AVAILABLE
EVALUATION KIT AVAILABLE
Functional Diagrams
Pin Configurations appear at end of data sheet.
Functional Diagrams continued at end of data sheet.
UCSP is a trademark of Maxim Integrated Products, Inc.
For pricing, delivery, and ordering information, please contact Maxim Direct
at 1-888-629-4642, or visit Maxim’s website at www.maximintegrated.com.
200mA, Automotive, Ultra-Low
Quiescent Current, Linear Regulator
General Description
The MAX16910 ultra-low quiescent current, high-voltage
linear regulator is ideal for use in automotive and battery-
operated systems. The device operates from a +3.5V to
+30V input voltage, delivers up to 200mA of load cur-
rent, and consumes only 20µA of quiescent current at
no load. The device consumes only 1.6µA current when
in shutdown. The input is +45V transient tolerant and is
designed to operate under load-dump conditions. The
MAX16910 can be configured as either fixed output volt-
age (+3.3V or +5V) or adjustable output voltage using an
external resistive divider.
The MAX16910 features an open-drain, active-low RESET
output with fixed thresholds offered at 92.5% and 87.5%
of the output voltage. The RESET output remains low for
a fixed period of 60µs after the output voltage exceeds
its threshold. The RESET delay can be extended with an
external capacitor.
The MAX16910 includes an enable input, short-circuit
protection, and thermal shutdown. The MAX16910 oper-
ates over the -40°C to +125°C automotive temperature
range. The device is available in a space-saving, ther-
mally enhanced, 3mm x 3mm, 8-pin TDFN package and
5mm x 4mm, 8-pin SO package.
Applications
Automotive
Industrial
Telecom
Features
S Low 20µA Quiescent Current
S +3.5V to +30V Wide Input Voltage Range, +45V
Tolerant
S Operates Through Cold-Crank Conditions
S Low-Dropout Voltage of 280mV at 200mA
S Up to 200mA Output Current Capability
S Stable Operation with Tiny 4.7µF Output Capacitor
S User-Selectable Output Voltage
+3.3V or +5V Fixed
+1.5V to +11V Adjustable with External
Resistive Divider
S Open-Drain RESET Output with Adjustable Delay
S Fixed-Reset Threshold Options: 87.5% or 92.5%
S High-Voltage Enable Input (+45V)
S Thermal and Short-Circuit Protection
S Operating -40°C to +125°C Temperature Range
S Operating -40°C to +150°C (TJ) Temperature
Range
S Automotive Qualified
19-4816; Rev 3; 4/12
Typical Operating Circuits
Typical Operating Circuits continued on next page.
Ordering Information/Selector Guide appears at end of data sheet.
MAX16910
IN
+
-
1µF
OUT
SETOV
RESET
ENABLE
1nF
(1.25ms DELAY)
4.7µF
VCC
RESET
I/O
5V FIXED OUTPUT
TIMEOUT
SET
GND
14V
BATTERY
µC
10kI
MAX16910
200mA, Automotive, Ultra-Low
Quiescent Current, Linear Regulator
Typical Operating Circuits (continued)
MAX16910
IN
+
-
1µF
OUT
SETOV
RESET
ENABLE
1nF
(1.25ms DELAY)
4.7µF
VCC
RESET
I/O
3.3V FIXED OUTPUT
TIMEOUT
SET
GND
14V
BATTERY
µC
10kI
MAX16910
IN
+
-
1µF
OUT
SETOV
RESET
SET
1nF
(1.25ms DELAY)
4.7µF
VCC
RESET
I/O
ADJUSTABLE OUTPUT
TIMEOUT
GND
ENABLE
14V
BATTERY
µC
10kI
R2
R1
MAX16910
2
200mA, Automotive, Ultra-Low
Quiescent Current, Linear Regulator
Pin Configurations
+
TDFN
MAX16910
TOP VIEW
8
1
7
2
6
3
5
TIMEOUT
SETOV
GND
OUT
RESET
SET
ENABLE
IN
4
*EP
*CONNECT EXPOSED PAD TO GND.
SETOV
TIMEOUT
*EP
RESET
1
2
8
7
OUT
GNDENABLE
SET
IN
SO
+
TOP VIEW
3
4
6
5
MAX16910
*CONNECT EXPOSED PAD TO GND.
3
MAX16910
200mA, Automotive, Ultra-Low
Quiescent Current, Linear Regulator
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute
maximum rating conditions for extended periods may affect device reliability.
(All voltages referenced to GND.)
IN, ENABLE, SET.................................................. -0.3V to +45V
OUT, RESET (open-drain output)............................-0.3V to +12V
SETOV, TIMEOUT....................................................-0.3V to +6V
Maximum Current (all pins except IN and OUT)...............50mA
Continuous Power Dissipation (TA = +70°C)
TDFN (derate 24.4mW/°C above +70°C)*.............1951mW
SO (derate 23.3mW/°C above +70°C)*................1861mW
Operating Temperature Range..........................-40°C to +125°C
Junction Temperature......................................................+150°C
Storage Temperature Range..............................-65°C to +150°C
Lead Temperature (soldering, 10s).................................+300°C
Soldering Temperature (reflow) ......................................+260°C
ABSOLUTE MAXIMUM RATINGS
Note 1: Package thermal resistances were obtained using the method described in JEDEC specification JESD51-7, using a four-layer
board. For detailed information on package thermal considerations, refer to www.maxim-ic.com/thermal-tutorial.
ELECTRICAL CHARACTERISTICS
(VIN = VENABLE = +14V, CTIMEOUT = open, CIN = 1µF, COUT = 4.7µF, unless otherwise noted. TA = -40°C to +125°C, TA P TJ P
+150°C, unless otherwise noted. Typical values are TA = +25°C.) (Note 2)
*As per JEDEC51 Standard (multilayer board).
PACKAGE THERMAL CHARACTERISTICS (Note 1)
TDFN
Junction-to-Ambient Thermal Resistance (qJA) ........... 41°C/W
Junction-to-Case Thermal Resistance (qJC) ..................8°C/W
SO
Junction-to-Ambient Thermal Resistance (qJA) ........... 43°C/W
Junction-to-Case Thermal Resistance (qJC) ..................7°C/W
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
Supply Voltage Range VIN Continuous 3.5 30 V
For P 400ms 45
Supply Current ILOAD = 0mA, SET = GND, VOUT = 5V 20 30 FA
Shutdown Supply Current ISHDN ENABLE = GND, TA = +25NC1.6 3 FA
ENABLE = GND, -40NC P TA P +125NC3
Output Voltage
(5V Fixed Output Setting) VOUT50
1mA P ILOAD P 200mA,
VIN = 6V to 30V (Note 3) 4.9 5.0 5.1
V
1mA P ILOAD P 50mA,
VIN = 6V to 30V, TJ = +150°C (Notes 3, 4) 4.9 5.0 5.1
Output Voltage
(3.3V Fixed Output Setting) VOUT33
1mA P ILOAD P 200mA, VIN = 4.8V to 30V
(Note 3) 3.234 3.3 3.366
V
1mA P ILOAD P 50mA, VIN = 4.8V to 30V,
TJ = +150°C (Notes 3, 4) 3.234 3.3 3.366
Adjustable Output-Voltage Range VOUT 1.5 11.0 V
SETOV FB Voltage VSETOV ILOAD = 1mA (Note 4) 1.225 1.25 1.275 V
Dropout Voltage (Note 5) DVDO
ILOAD = 200mA, SET = GND, SETOV =
HIGH, VOUT(NORM) = +5.0V 280 600
mV
ILOAD = 50mA, SET = GND, SETOV =
HIGH, VOUT(NORM) = +5.0V, TJ = +150°C
(Notes 3, 4)
600
MAX16910
4
200mA, Automotive, Ultra-Low
Quiescent Current, Linear Regulator
ELECTRICAL CHARACTERISTICS (continued)
(VIN = VENABLE = +14V, CTIMEOUT = open, CIN = 1µF, COUT = 4.7µF, unless otherwise noted. TA = -40°C to +125°C, TA P TJ P
+150°C, unless otherwise noted. Typical values are TA = +25°C.) (Note 2)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
Short-Circuit Output Current Limit ISC Output shorted to GND (MAX16910C__) 230 330 mA
Thermal Shutdown (Note 6) +180 NC
Thermal Shutdown Hysteresis (Note 6) +25 NC
Line Regulation
(5V Fixed Output Setting) VIN = 6V to 30V, ILOAD = 1mA 1 mV
Line Regulation
(3.3V Fixed Output Setting) VIN = 4.8V to 30V, ILOAD = 1mA 1 mV
Load Regulation
(5V Fixed Output Setting) ILOAD = 1mA to 200mA 12 mV
Load Regulation
(3.3V Fixed Output Setting) ILOAD = 1mA to 200mA 12 mV
Power-Supply Rejection Ratio PSRR ILOAD = 10mA, f = 100Hz, 500mVP-P
(Note 6) 60 dB
Startup Response Time tSTART Rising edge of VIN to VOUT, ILOAD = 50mA
(Note 6) 160 Fs
TIMEOUT INPUT
TIMEOUT Ramp Current ITO TIMEOUT connected to GND 0.600 1.0 1.650 FA
TIMEOUT Ramp Delay 1.25 ms/nF
RESET Default Timeout Period VOUT rising, TIMEOUT = OPEN 30 60 90 Fs
RESET OUTPUT
RESET Threshold MAX16910__9/V+, VOUT falling 90 92.5 94 % of
VOUT
MAX16910__8/V+, VOUT falling 85 87.5 89
RESET Threshold Hysteresis VOUT rising 5% of
VOUT
OUT to RESET Delay VOUT falling (Note 6) 4Fs
RESET Output-Voltage Low
(Open-Drain) VOL ISINK = 0.5mA, RESET asserted 0.4 V
RESET Open-Drain Leakage
Current
RESET not asserted, RESET = 7V,
TA = +25NC1FA
RESET Open-Drain Leakage
Current RESET not asserted, RESET = 7V 0.03 FA
ENABLE
ENABLE Logic-Low VIL 0.4 V
ENABLE Logic-High VIH 2.4 V
ENABLE Pulldown Current (Note 7) 0.65 FA
SET INPUT
SET Input Current (All Modes) TA = +25NC-50 +50 nA
TJ = +150NC0.2 FA
SET Logic-Low VILSET 0.4 V
Set Logic-High VIHSET 2.4 V
5
MAX16910
200mA, Automotive, Ultra-Low
Quiescent Current, Linear Regulator
Note 2: Production tested at TA = +25°C. Overtemperature limits are guaranteed by ATE characterization between -40°C P TJ ≤
+150°C, unless otherwise noted.
Note 3: Observe the absolute maximum power dissipation limits.
Note 4: Specification characterized up to +150°C operating junction temperature. Limits are guaranteed by bench characterization.
Note 5: Dropout voltage is defined as (VIN - VOUT) when VOUT is 2% below the value of VOUT for VIN = VOUT + 3V.
Note 6: Not production tested.
Note 7: ENABLE is internally pulled to GND.
ELECTRICAL CHARACTERISTICS (continued)
(VIN = VENABLE = +14V, CTIMEOUT = open, CIN = 1µF, COUT = 4.7µF, unless otherwise noted. TA = -40°C to +125°C, TA P TJ P
+150°C, unless otherwise noted. Typical values are TA = +25°C.) (Note 2)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
SETOV INPUT (TRI-MODE)
SETOV Input Leakage Current SET = HIGH, VSETOV = 5V
or SET = GND, VSETOV = 5V 1FA
SETOV Low-Level Input Voltage VILSETOV SET = GND, VSETOV < VILSETOV or places
device in +3.3V fixed output-voltage mode 0.4 V
SETOV High-Level Input Voltage VIHSETOV SET = GND, VSETOV > VIHSETOV or places
device in +5V fixed output-voltage mode
VOUT
- 0.4 V
MAX16910
6
200mA, Automotive, Ultra-Low
Quiescent Current, Linear Regulator
Typical Operating Characteristics
(VIN = VEN = +14V, CIN = 1µF, COUT = 4.7µF ceramic, TA = +25°C, unless otherwise noted.)
SHUTDOWN SUPPLY CURRENT
vs. TEMPERATURE
TEMPERATURE (NC)
125
1007550250-25
2
4
6
8
10
0
-50 150
MAX16910 toc04
IIN (FA)
VIN = 30V
VIN = 14V
VIN = 6V
RESET THRESHOLD
vs. TEMPERATURE
TEMPERATURE (NC)
125
1007550250-25
4.3
4.6
4.9
5.2
5.5
4.0
-50 150
MAX16910 toc05
RESET THRESHOLD VOLTAGE (V)
MAX16910_9/V RISING
MAX16910_9/V FALLING
MAX16910_8/V RISING
MAX16910_8/V FALLING
VOUT = 5V
DROPOUT VOLTAGE vs. LOAD CURRENT
(5V OUTPUT)
LOAD CURRENT (mA)
DROPOUT VOLTAGE (V)
180160120 14040 60 80 10020
0.05
0.10
0.15
0.20
0.25
0.30
0.35
0.40
0.45
0.50
0
0 200
MAX16910 toc06
TA = +150NC
TA = +125NC
TA = +25NC
TA = -40NC
SUPPLY CURRENT
vs. SUPPLY VOLTAGE
MAX16910 toc01
VIN (V)
IIN (FA)
252015105
18
21
24
27
30
15
03
0
ILOAD = 0
GROUND CURRENT
vs. LOAD CURRENT
ILOAD (mA)
IGND (FA)
18016014012010080604020
20
40
60
80
0
0 200
MAX16910 toc02
TA = +125NCTA = +25NC
TA = -40NC
VOUT = 3.3V
SHUTDOWN SUPPLY CURRENT
vs. SUPPLY VOLTAGE
VIN (V)
IIN (FA)
252015105
2
4
6
8
10
0
03
0
MAX16910 toc03
7
MAX16910
200mA, Automotive, Ultra-Low
Quiescent Current, Linear Regulator
Typical Operating Characteristics (continued)
(VIN = VEN = +14V, CIN = 1µF, COUT = 4.7µF ceramic, TA = +25°C, unless otherwise noted.)
DROPOUT VOLTAGE vs. LOAD CURRENT
(3.3V OUTPUT)
LOAD CURRENT (mA)
DROPOUT VOLTAGE (V)
180160120 14040 60 80 10020
0.05
0.10
0.15
0.20
0.25
0.30
0.35
0.40
0.45
0.50
0
0 200
MAX16910 toc07
TA = +150NC
TA = +125NC
TA = +25NC
TA = -40NC
OUTPUT VOLTAGE vs.
SUPPLY VOLTAGE
VIN (V)
VOUT (V)
3530252015105
0.5
1.0
1.5
2.0
2.5
3.0
3.5
0
04
0
MAX16910 toc08
ILOAD = 0mA
SETOV = GND
SET = GND
OUTPUT VOLTAGE vs.
SUPPLY VOLTAGE
353020 2510 155
0.5
1.0
1.5
2.0
2.5
3.0
3.5
4.0
4.5
5.0
5.5
0
04
0
MAX16910 toc09
VIN (V)
VOUT (V)
ILOAD = 0mA
SETOV = OUT
SET = GND
OUTPUT VOLTAGE
vs. TEMPERATURE
MAX16910 toc10
TEMPERATURE (°C)
OUTPUT VOLTAGE (V)
12080400
4.96
4.97
4.98
4.99
5.00
5.01
5.02
5.03
5.04
5.05
4.95
-40
IOUT = 10mA
RESET TIMEOUT PERIOD vs.
TEMPERATURE
TEMPERATURE (NC)
TIMEOUT PERIOD (Fs)
125100-25 0 25 50 75
25
30
35
40
45
50
55
60
20
-50 150
CTIMEOUT UNCONNECTED
MAX16910 toc11
POWER-SUPPLY REJECTION RATIO
vs. FREQUENCY
FREQUENCY (kHz)
PSRR (dB)
1001010.1
-60
-50
-40
-30
-20
-10
0
-70
0.01 1000
MAX16910 toc12
ILOAD = 10mA
VIN = 14V + 0.5VP-P
MAX16910
8
200mA, Automotive, Ultra-Low
Quiescent Current, Linear Regulator
Typical Operating Characteristics (continued)
(VIN = VEN = +14V, CIN = 1µF, COUT = 4.7µF ceramic, TA = +25°C, unless otherwise noted.)
RESET OUTPUT VOLTAGE
vs. SINK CURRENT
RESET SINK CURRENT (mA)
RESET OUTPUT VOLTAGE (V)
10.10.01
0.3
0.6
0.9
1.2
1.5
0
0.001 10
MAX16910 toc13
LOAD-TRANSIENT RESPONSE
(5V OUTPUT)
MAX16910 toc15
IOUT
VOUT
(AC-COUPLED)
100mV/div
180mA
10mA
200Fs/div
LOAD-TRANSIENT RESPONSE
(3V OUTPUT)
MAX16910 toc16
IOUT
VOUT
(AC-COUPLED)
100mV/div
180mA
10mA
200Fs/div
LINE-TRANSIENT RESPONSE
(5V OUTPUT)
MAX16910 toc17
VIN
VOUT
(AC-COUPLED)
200mV/div
28V
6V
2ms/div
LINE-TRANSIENT RESPONSE
(3.3V OUTPUT)
MAX16910 toc18
VIN
VOUT
(AC-COUPLED)
200mV/div
28V
4.8V
2ms/div
RESET TIMEOUT PERIOD vs.
TIMEOUT CAPACITANCE
CTIMEOUT (nF)
TIMEOUT PERIOD (ms)
1010.1
1
10
100
1000
0.1
0.01 100
MAX16910 toc14
POWER-UP RESPONSE
MAX16910 toc20
VIN
0V
0A
VOUT
IOUT
0V
170mA
14V
3.3V
40Fs/div
IOUT = 170mA
VEN = VIN
POWER-UP RESPONSE
MAX16910 toc19
VIN
0V
0V
VOUT
14V
3.3V
40Fs/div
IOUT = 0A
VIN = VEN
9
MAX16910
200mA, Automotive, Ultra-Low
Quiescent Current, Linear Regulator
Pin Description
Typical Operating Characteristics (continued)
(VIN = VEN = +14V, CIN = 1µF, COUT = 4.7µF ceramic, TA = +25°C, unless otherwise noted.)
ENABLE STARTUP RESPONSE
MAX16910 toc21
5V
0A
VOUT
0V
VIN
3.3V
40Fs/div
ENABLE STARTUP RESPONSE
MAX16910 toc22
5V
0A
VOUT
IOUT
0V
0V
VEN
3.3V
175mA
40Fs/div
LOAD-DUMP TRANSIENT RESPONSE
MAX16910 toc23
14V
VIN
42V
100ms/div
VOUT
(AC-COUPLED)
100mV/div
PIN NAME FUNCTION
1 IN Regulator Input. Bypass IN to GND with a 1FF (min) low-ESR ceramic capacitor.
2 ENABLE
Active-High Enable Input. Force ENABLE high (or connect to IN) to turn the regulator on. Pull
ENABLE low (or leave unconnected) to place the device in a low-power shutdown mode. ENABLE
is internally pulled down to GND through a 0.65FA current sink.
3 SET
Feedback Network Selector. Connect SET to GND when operating the MAX16910 in fixed output-
voltage mode (3.3V or 5V) using the internal feedback network. Connect SET to IN or any voltage
higher than 2.4V when an external feedback network (resistive divider) is used, operating the
MAX16910 in adjustable output-voltage mode.
4RESET
Active-Low, Open-Drain Reset Output. RESET asserts low when OUT is below the reset threshold,
and remains low for the duration of the reset timeout period after the reset conditions end. RESET
also asserts low when ENABLE is low and during thermal shutdown.
5 TIMEOUT
Reset-Timeout-Period Adjust Input. Internal capacitance produces a 60Fs default delay when
TIMEOUT is left unconnected. Connect a capacitor from TIMEOUT to GND to set a longer timeout
period than default.
6 SETOV
Regulated Output-Voltage Selector. Connect SETOV to OUT for a 5V fixed output, or connect
SETOV to GND for a 3.3V fixed output. SETOV becomes the feedback path when using an exter-
nal resistive divider for an adjustable output.
7 GND Ground
8 OUT
Regulator Output. Bypass OUT to GND with a minimum of 4.7FF. Use a low-ESR, ceramic capaci-
tor (X7R, X5R) for optimal performance. The SETOV input controls the output voltage when in fixed
+3.3V or fixed +5V output-voltage mode. Using an external resistive divider between OUT and
SETOV sets adjustable output voltage from +1.5V to +11V.
— EP
Exposed Pad. EP is internally connected to GND. Connect EP to the ground plane to provide a
low thermal-resistance path from the thermal junction to the PCB. Do not use EP as the only elec-
trical connection to GND.
MAX16910
10
200mA, Automotive, Ultra-Low
Quiescent Current, Linear Regulator
Functional Diagram
_______________Detailed Description
The MAX16910 low-quiescent current, high-voltage lin-
ear regulator is ideal for use in automotive and battery-
operated systems. The device operates from an input
voltage of +3.5V to +30V, delivers up to 200mA of load
current, and consumes only 20µA of quiescent current
at no load. The input is +45V tolerant and is designed
to operate under load-dump conditions. The MAX16910
can be user configured as either a fixed output voltage
(+3.3V or +5V) or an adjustable output voltage using an
external resistive divider.
The MAX16910 features an open-drain, active-low
RESET output with fixed thresholds offered at 92.5%
and 87.5% of the output voltage. The RESET output
remains low for a fixed period of 60µs after the output
voltage exceeds its threshold. The RESET delay can be
extended with an external capacitor. The MAX16910
includes an enable input short-circuit protection and
thermal shutdown.
Fixed Output-Voltage Mode
The SET and SETOV inputs determine the output mode.
For the 5V fixed output-voltage mode (see the 5V fixed
output circuit in the Typical Operating Circuits), con-
nect SET to GND and SETOV to OUT. For the 3.3V fixed
output-voltage mode (see the 3.3V fixed output circuit
in the Typical Operating Circuits) connect SET to GND
and SETOV to GND.
Adjustable Output-Voltage Mode
For the adjustable output-voltage mode (see the adjust-
able output circuit in the Typical Operating Circuits),
connect SET to IN or a voltage > 2.4V and connect
SETOV to a resistive divider R1 and R2 between OUT
and GND. An output voltage between 1.5V and 11V can
be selected using the following equation:
VOUT = VSETOV x (1 + R1/R2)
where VSETOV = 1.25V and R2 should be less than or
equal to 100kω.
MAX16910
1.253V
ENABLE
IN
1.156V (92.5%)
or
1.094V (87.5%)
OVERCURRENT
PROTECTION
THERMAL
PROTECTION
CONTROL
LOGIC
RESET
TIMEOUT
OUTPUT-
VOLTAGE
SELECT MUX
GND
TIMEOUT
RESET
SETOV
SET
OUT
11
MAX16910
200mA, Automotive, Ultra-Low
Quiescent Current, Linear Regulator
ENABLE
ENABLE is an active-high, logic-level enable input that
turns the device on or off. Drive ENABLE high to turn
the device on. An internal 0.65µA pulldown current
keeps the MAX16910 in shutdown mode when driven
by a three-state driver in high-impedance mode, or an
open-drain driver. When in shutdown, the MAX16910
consumes only 1.6µA. ENABLE withstands voltages up
to 45V, allowing it to be driven by high-input level volt-
ages or connected to IN for always-on operation.
Thermal Protection
The MAX16910 features thermal protection. When the
junction temperature exceeds +180°C, an internal ther-
mal sensor turns off the pass transistor, and allows the
device to cool. The thermal sensor turns on the pass
transistor again after the junction temperature cools by
25°C. This results in a cycled output during continuous
thermal-overload conditions. Thermal protection protects
the MAX16910 in the event of fault conditions. For con-
tinuous operation, do not exceed the absolute maximum
junction temperature rating of +150°C.
Output Short-Circuit Current Limit
The MAX16910 features a 330mA current limit. The out-
put can be shorted to GND continuously without dam-
age to the device. During a short circuit, the power dis-
sipated across the pass transistor can quickly heat the
device. When the die temperature reaches +180°C, the
MAX16910 turns off the pass transistor and automatically
restarts after the die temperature has cooled by 25°C.
RESET Output
The MAX16910 features an active-low, open-drain reset
output. Once the monitored output voltage exceeds the
reset threshold voltage, RESET remains low for the reset
timeout period and then goes high. RESET changes from
high to low whenever the monitored output voltage drops
below the reset threshold voltage. RESET also asserts
low when ENABLE is low and during thermal shutdown.
Timeout
The MAX16910 features a reset timeout period adjustable
input. The internal capacitance produces a 60µs default
delay when TIMEOUT is left unconnected. Connect a
capacitor from TIMEOUT to GND to set a higher timeout
period than default. Use the following formula to deter-
mine the reset timeout capacitor:
CTIMEOUT = 0.8 x ITO x TTIMEOUT
where CTIMEOUT is in nF, ITO is in µA, and TTIMEOUT is
in ms.
For example, if ITO is 1µA, CTIMEOUT needs to be 8nF to
get a 10ms delay.
___________Applications Information
Output-Capacitor Selection and
Regulator Stability
For stable operation over the full temperature range,
with fixed 3.3V and 5.0V output voltages, use a low-ESR
4.7µF capacitor. For resistor-programmed output voltag-
es, a 10µF low-ESR ceramic capacitor is recommended
for stable operation. Use larger output-capacitor values
such as 22µF to reduce noise, improve load-transient
response and power-supply rejection. Some ceramic
dielectrics exhibit large capacitance and ESR variations
with temperature. To improve power-supply rejection
and transient response, use a capacitor larger than the
minimum 1µF capacitor between IN and GND.
Available Output-Current Calculation
The MAX16910 provides up to 200mA of continuous
output current. The input voltage range extends to
30V. Package power dissipation limits the amount of
output current available for a given input/output voltage
and ambient temperature. Figure 1 shows the maxi-
mum allowable power dissipation for these devices to
keep the junction temperature below +150°C. Figure 1
assumes that the exposed metal pad of the MAX16910 is
soldered to a 1in2 of multilayer copper board. Use Figure
1 to determine the allowable package dissipation for a
given ambient temperature. Alternately, use the following
formulas to calculate the allowable power dissipation PD.
For the TDFN-EP package:
( )
A
D
AA
1.951W for T 70 C
PW
1.951W 0.0244 T 70 C for 70 C T 125 C
C
≤+ °

=

− × − ° + ° ≤ <+ °

°
For the SO-EP package:
( )
A
D
AA
1.861W for T 70 C
PW
1.861W 0.0233 T 70 C for 70 C T 125 C
C
≤+ °

=

− × − ° + ° ≤ <+ °

°
MAX16910
12
200mA, Automotive, Ultra-Low
Quiescent Current, Linear Regulator
After determining the allowable power dissipation, cal-
culate the maximum allowable output current, without
exceeding the +150°C junction temperature, using the
following formula:
D
OUT(MAX) IN OUT
P
I VV
=−
The above equations do not include the negligible power
dissipation from self-heating due to the device ground
current.
Example 1 (TDFN-EP Package):
TA = +125°C, VIN = 16V, VOUT = 3.3V
Calculate the maximum allowable power dissipation at
the given temperature as follows:
( )
D
W
P 1.951W 0.0244 125 C 70 C 609mW
C
= − × °− ° =
°
And establish the maximum output current:
OUT(MAX) 609mW
I 48mA
16V 3.3V
= ≅
−
Example 2 (TDFN-EP Package):
TA = +50°C, VIN = 9V, VOUT = 5V
Calculate the maximum allowable power dissipation at
the given temperature as follows:
PD = 1.951W
Find the maximum output current:
OUT(MAX) OUT(MAX) SC
1.951W
I 488mA I I = 330mA (typ)
9V 5V
==⇒=
−
In Example 2, the maximum output current is calculated
as 488mA. The allowable output current cannot exceed
the given internal current limit for the device of 330mA
(typ).
Selecting Timeout Capacitor
The reset timeout period is adjustable to accommodate
a variety of microprocessor applications. Adjust the
reset timeout period by connecting a capacitor between
TIMEOUT and GND.
RP TO
TIMEOUT
1.25 C
t I
×
=
where tRP is in ms and CTIMEOUT is in nF.
Leave TIMEOUT unconnected to select the internally
fixed timeout period. CTIMEOUT must be a low-leakage
(< 10nA) type capacitor. Ceramic capacitors are recom-
mended; do not use capacitor values lower than 100pF
to avoid the influence of parasitic capacitances.
Exposed Pad
The MAX16910 package features an exposed thermal
pad on its underside that should be used as a heatsink.
This pad lowers the package’s thermal resistance by
providing a direct heat-conduction path from the die
to the PCB. Connect the exposed pad and GND to the
system ground using a large pad or ground plane, or
multiple vias to the ground plane layer.
Figure 1. Calculated Maximum Power Dissipation vs. Ambient
Temperature
0
0.2
0.4
0.6
0.8
1.0
1.2
1.4
1.6
1.8
2.0
2.2
2.4
0 20 40 60 80 100 120 140
TEMPERATURE (°C)
PD (W)
1.951W
8-PIN TDFN-EP
1.861W
8-PIN SO-EP DERATE
24.4mW/°C
DERATE
23.3mW/°C
13
MAX16910
200mA, Automotive, Ultra-Low
Quiescent Current, Linear Regulator
+Denotes a lead(Pb)-free/RoHS-compliant package.
/V denotes an automotive qualified part.
*EP = Exposed pad.
__________________________Chip Information
PROCESS: BiCMOS DMOS
Package Information
For the latest package outline information and land patterns,
go to www.maxim-ic.com/packages. Note that a “+”, “#”, or
“-” in the package code indicates RoHS status only. Package
drawings may show a different suffix character, but the drawing
pertains to the package regardless of RoHS status.
Ordering Information/Selector Guide
PACKAGE
TYPE
PACKAGE
CODE
OUTLINE
NO.
LAND
PATTERN NO.
8 TDFN-EP T833+2 21-0137 90-0059
8 SO-EP S8E+12 21-0111 90-0150
PART RESET THRESHOLD PIN-PACKAGE TOP MARK
MAX16910CATA8/V+ 87.5 8 TDFN-EP*
(3mm x 3mm) +BLW
MAX16910CATA9/V+ 92.5 8 TDFN-EP*
(3mm x 3mm) +BLV
MAX16910CASA8/V+ 87.5 8 SO-EP*
(5mm x 4mm) —
MAX16910CASA9/V+ 92.5 8 SO-EP*
(5mm x 4mm) —
MAX16910CATA8+ 87.5 8 TDFN-EP*
(3mm x 3mm) +BOW
MAX16910CATA9+ 92.5 8 TDFN-EP*
(3mm x 3mm) +BOV
MAX16910CASA8+ 87.5 8 SO-EP*
(5mm x 4mm) —
MAX16910CASA9+ 92.5 8 SO-EP*
(5mm x 4mm) —
MAX16910
14
200mA, Automotive, Ultra-Low
Quiescent Current, Linear Regulator
Revision History
REVISION
NUMBER
REVISION
DATE DESCRIPTION PAGES
CHANGED
0 7/09 Initial release —
1 10/10
Added a junction temperature range of -40°C to +150°C in the Features section,
updated Electrical Characteristics table with +150°C junction temperature in “5V
Output Voltage,” “3.3V Output Voltage,” and “Dropout Voltage” parameters, added
new Note 4, updated TOC 10 and Figure 1
1, 4, 5, 6, 8, 13
2 7/11 Removed the typ value from the “Dropout Voltage” ILOAD = 50mA parameter in the
Electrical Characteristics table 4
3 4/12 Added consumer-grade products to data sheet 1,14
15
Maxim Integrated 160 Rio Robles, San Jose, CA 95134 USA 1-408-601-1000
Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied.
Maxim reserves the right to change the circuitry and specifications without notice at any time. The parametric values (min and max limits) shown in the Electrical
Characteristics table are guaranteed. Other parametric values quoted in this data sheet are provided for guidance.
© 2012 Maxim Integrated The Maxim logo and Maxim Integrated are trademarks of Maxim Integrated Products, Inc.
MAX16910