MIC5396/7/8/9
Low-Power Dual 300mA LDO in
1.2mm x 1.6mm Extra Thin DFN
Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • US A • tel +1 (408) 944-0800 • fax + 1 (408) 474-1000 • http://www.micrel.com
December 2012
M9999-120712-A
General Description
The MIC5396/7/8/9 is an advanced dual LDO ideal for
powering general purpose portable devices. The
MIC5396/7/8/9 provides two high-performance,
independent 300mA LDOs in a single package. This
makes it possible to improve system efficiency by
providing two independent supply inputs that can be
optimized for each individual LDO. The MIC5396/7/8/9
also features a wide out put vo ltag e ran ge do wn to 1.0V .
Its full f eature set and lo w dr opout v oltage m ake it ideal f or
battery-powered applications. The MIC5396/7/8/9 offers
2% accur acy, low drop out voltage ( 160mV at 300m A), and
low ground current (typically 42μA per LDO at full load).
The MIC5396/7/8/9 can also be put into a zero off mode
current state, drawing virtually no current when disabled.
When the MIC5397/9 is disabled an internal resistive load
is automatically applied to the output to discharge the
output capacitor. In addition, the MIC5398/9 offers an
internal en able pu ll-down r esistor to ensure th at the o utput
is disabled when the enable is in tri-state mode. These
LDO’s also offer fast transient response and high PSRR
while consuming a minimum operating current. The family
is available in a tin y 8-pin, 1.2mm x 1.6mm leadless Extra
Thin DFN package.
Data sheets and support documentation can be found on
Micrel’s web site at www.micrel.com.
Features
• 2.5V to 5.5V input voltage range
• Independent power inputs
• Output voltage range from 1V to 3.3V
• Two 300mA outputs
• High output accuracy (±2%)
• Low quiescent current – 37µA typical/LDO
• Stable with 1µF ceramic output capacitors
• Low dropout voltage (160mV at 300mA)
• Independent enable pins
• Internal enable pull-down (MIC5398, MIC5399)
• Output discharge circuit (MIC5397, MIC5399)
• Thermal-shutdown protec ti on
• Current-limit protection
• 8-pin 1.2mm x 1.6mm Extra Thin DFN package
Applications
• Camera phones
• Mobile phones
• DSC, GPS, PMP and PDAs
• Portable medical devices
• Portable electronics
_________________________________________________________________________________________________________________________
Typical Appli cation
Micrel, Inc.
MIC5396/7/8/9
December 2012
2 M9999-120712-A
Ordering Information
Part Number Marking VOUT1/VOUT2(1) EN
Discharge
Circuit
Output
Discharge
Circuit
Junction Temp.
Range Package
MIC5396-GMYMX F2 1.8V/2.8V –– – –40° to +125°C 8-Pin 1.2x1.6 XTDFN
MIC5397-GPYMX D4 1.8V/3.0V – X –40° to +125°C 8-Pin 1.2x1.6 XTDFN
MIC5398-P4YMX E5 3.0V/1.2V X – –40° to +125°C 8-Pin 1.2x1.6 XTDFN
MIC5399-SSYMX H4 3.3V/3.3V X X –40° to +125°C 8-Pin 1.2x1.6 XTDFN
MIC5399-SMYMX H6 3.3V/2.8V X X –40° to +125°C 8-Pin 1.2x1.6 XTDFN
MIC5399-SGYMX H5 3.3V/1.8V X X –40° to +125°C 8-Pin 1.2x1.6 XTDFN
MIC5399-MMYMX H7 2.8V/2.8V X X –40° to +125°C 8-Pin 1.2x1.6 XTDFN
MIC5399-GPYMX
(3)
H8 1.8V/3.0V X X –40° to +125°C 8-Pin 1.2x1.6 XTDFN
MIC5399-GMYMX H1 1.8V/2.8V X X –40° to +125°C 8-Pin 1.2x1.6 XTDFN
Notes:
1. Other voltages are available. Contact Micrel for details.
2. Extra Thi n DF N is a GREEN RoHS-com pliant package. Level finish is NiPdAu. Mold compound is Halogen Free.
3. Contact Mic rel Marketing to order.
Pin Configuration
8-Pin 1.2mm x 1.6mm Extra Thin DFN (MX)
Pin Description
Pin Number Pin Name Pin Function
1, 4 GND Ground.
2 VOUT1 Output regulator 1: Connect a capacitor to ground.
3 VOUT2 Output regulator 2: Connect a capacitor to ground.
5 EN2 Enable input for regulator 2: Active-high input. Logi c high = On; Logic low = Off. MIC5396/7 Do
not leave floating. MIC5398/9 internal pull-down resistor, tri-state = Off.
6 VIN2 Input voltage supply for regulator 2: Connect a capacitor to ground.
7 VIN1 Input voltage supply for regulator 1: Connect a capacitor to ground.
8 EN1 Enable input for regulator 1. Active-high input. Logi c high = On; Logic low = Off. MIC5396/7 Do
not leave floating. MIC5398/9 internal pull-down resistor, tri-state = Off.
EP ePad Heatsink pad: Connect to grou nd.
Micrel, Inc.
MIC5396/7/8/9
December 2012
3 M9999-120712-A
Absolute Maximum Ratings(1)
Supply Voltage (VIN1, VIN2) ............................... –0.3V to +6V
Enable Voltage (VEN1, VEN2). .............................. –0.3V to VIN
Power Dissipation (PD) ........................... I nterna lly Limited(3)
Lead Temperature (soldering, 10sec.) ....................... 260°C
Junction Temperature (TJ) ........................ –40°C to +125°C
Storage Temperature (Ts) ......................... –65°C to +150°C
ESD Rating(4) .................................................................. 3kV
Operating Ratings(2)
Supply Voltage (VIN1, VIN2) .............................. +2.5V to 5.5V
Enable Voltage (VEN1, VEN2). ................................... 0V to VIN
Junction Temperature (TJ) ........................ –40°C to +125°C
Junction Thermal Resistance
1.2mm x 1.6mm Extra Thin DFN (θJA).......... 172.6°C/W
Electrical Characteristics(4)
VIN1 = VEN1 = VOUT1 + 1V, VIN2 = VEN2 = VOUT2 + 1V, IOUT1 = IOUT2 = 100µA; CIN1 = C IN2 = COUT1 = COUT2 = 1µF;
TJ = 25°C. Bold v alues indicat e –40°C to +125°C, unless noted.
Parameter Condition Min Typ Max Units
Output Voltage Accuracy Variation from nominal VOUT –2.0 +2.0 %
Variation from nominal VOUT –3.0 +3.0 %
Line Regulation VIN = VOUT +1V to 5.5V, IOUT = 100µA 0.02 0.3 %/V
Load Regulation IOUT = 100µA to 300mA 8 40 mV
Dropout Voltage IOUT = 150mA
IOUT = 300mA 80
160 190
380 mV
mV
Ground Pin Current VEN1 = High; VEN2 = Low; IOUT1 = 0mA
VEN1 = Low; VEN2 = High; IOUT2 = 0m A
VEN1 = VEN2 = High; IOUT1 = IOUT2 = 0mA
VEN1 = High; VEN2 = Low; IOUT1 = 300mA
VEN1 = Low; VEN2 = High; IOUT2 = 300mA
VEN1 = VEN2 = High; IOUT1 = IOUT2 = 300mA
37
37
74
42
42
84
55
55
110
65
65
130
µA
µA
µA
µA
µA
µA
Shutdown Current VEN1 = VEN2 = 0V 0.05 1 µA
Ripple Rejection f = 1kHz; COUT = 1µF 60 dB
Current Limit VOUT = 0V 400 630 900 mA
Output Voltage Noise COUT = 1µF, 10Hz to 100kHz 93 µVRMS
Auto-Discharge NFET
Resistance MIC5397, MIC5399 Only; VEN1 = VEN2 = 0V; VIN = 3.6V;
IOUT = –3mA 25 Ω
Enable Inputs (EN1/EN2)
Enable Pull-Down Resistor MIC5398, MIC5399 4 MΩ
Enable Input Voltage Logic Low 0.2 V
Logic High 1.2 V
Enable Input Current
MIC5396, MIC5397 VEN = 0V 0.01 1 µA
VEN = 5.5V 0.01 1 µA
Enable Input Current
MIC5398, MIC5399 VEN = 0V 0.01 1 µA
VEN = 5.5V 1.4 2 µA
Turn-on Time COUT = 1µF 50
125
µs
Notes:
1. Exceeding the absolute maximum ratings can damage the device.
2. The device is not guaranteed to functi on outside its operat i ng rating.
3. The maximum allowable power dissipation of any TA (ambient temperature) is PD(max) = (TJ(m ax) – TA) / θJA. Exceeding the maximum allowable power
dissipati on will result in excessi ve die tem perat ure, and the regulat or will go into thermal shutdown.
4. Devices are ESD sensitive. Handling precautions recommended. Human body model, 1.5kΩ in series with 100pF.
5. Specific at i on for packaged product only.
Micrel, Inc.
MIC5396/7/8/9
December 2012
4 M9999-120712-A
Typical Characteris tics
-100
-90
-80
-70
-60
-50
-40
-30
-20
-10
010 100 1,000 10,000 100,0001,000,000
PSRR (dB)
FREQUENCY (Hz)
Power Supply
Rejection Ratio
V
IN
= 2.8V
V
OUT
=1.8V
C
OUT
=1µF
300mA
150mA
100µA
10 100 1K 10K 100K 1M
0.0
0.5
1.0
1.5
2.0
2.5
3.0
2.5 3.0 3.5 4.0 4.5 5.0 5.5
OUTPUT VOLTAGE (V)
INPUT VOLTAGE (V)
Output Voltage
vs. Input Voltage
LDO1-100µA
LDO2-100µA LDO2-300mA
V
OUT1
= 1.8V
V
OUT2
= 2.8V
C
IN
= C
OUT
= 1µF
2.0
2.1
2.2
2.3
2.4
2.5
2.6
2.7
2.8
2.9
3.0
050 100 150 200 250 300
OUTPUT VOLTAGE (V)
OUTPUT CURRENT (mA)
Output Voltage
vs. Output Current
VIN2 = VEN2= VOUT2 +1V
VOUT2 = 2.8V
CIN = COUT = 1µF
0
10
20
30
40
50
60
2.5 3.0 3.5 4.0 4.5 5.0 5.5
GROUND CURRENT (µA)
INPUT VOLTAGE (V)
Ground Curre nt
vs. Input Voltage
150mA 100µA
150mA 100µA
300mA
VOUT =2.8V
CIN = COUT= 1µF
0
10
20
30
40
50
60
70
80
90
100
050 100 150 200 250 300
GROUND CURRENT ( µA)
OUTPUT CURRENT (mA)
Ground Curre nt
vs. Output Current
DUAL OUTPUT
SINGLE OUTPUT
V
EN
= 3.8V
V
IN
=3.8V
V
OUT
=2.8V
C
IN
= C
OUT
= 1µF
0
10
20
30
40
50
60
70
80
90
-40 -20 020 40 60 80 100 120
GROUND CURRENT (µA)
TEMPERATURE (°C)
Ground Curre nt
vs. Temperature
DUAL OUTPUT
SINGLE OUT PUT
V
IN
= V
EN
= 3.8V
V
OUT
= 2.8V
C
IN
=C
OUT
= 1µF
0
20
40
60
80
100
120
140
160
180
050 100 150 200 250 300
DROPOUT VOLTAGE (mV)
OUTPUT CURRENT (mA)
Dropout Voltage
vs. Output Current
V
OUT
= 2.8V
C
IN
= C
OUT
= 1µF
0
20
40
60
80
100
120
140
160
180
200
220
240
-40 -20 020 40 60 80 100 120
DROPOUT VOLTAGE (mV)
TEMPERATURE (°C)
Dropout Voltage
vs. Temperature
300mA
150mA
C
IN
= C
OUT
=1µF 10mA
400
450
500
550
600
650
700
750
800
850
900
2.5 3.0 3.5 4.0 4.5 5.0 5.5
CURRENT LIMIT (mA )
INPUT VOLTAGE (V)
Current Limit
vs. Input Voltage
LDO1
LDO2
V
OUT1
= 1.8V
V
OUT2
= 2.8V
C
IN
= C
OUT
= 1µF
Micrel, Inc.
MIC5396/7/8/9
December 2012
5 M9999-120712-A
Typical Characteristics (Continued)
0.0001
0.001
0.01
0.1
1
10
10 100 1,000 10,000 100,000 1,000,00010,000,000
NOISE (µV/√Hz)
FREQUENCY (Hz)
Output Noise
Spectral Density
V
IN
=V
EN
= 4.5V
COUT = 1µF
VOUT = 1.8V
10 100 1K 10K 100K 1M 10M
Micrel, Inc.
MIC5396/7/8/9
December 2012
6 M9999-120712-A
Functional Characteristics
Micrel, Inc.
MIC5396/7/8/9
December 2012
7 M9999-120712-A
Functional Diagram
MIC5396/7/8/9 Block Diagram
Micrel, Inc.
MIC5396/7/8/9
December 2012
8 M9999-120712-A
Application Information
MIC5396/7/8/9 is a dual 300mA LDO in a tiny 8-pin
1.2mm x 1.6mm extra thin DFN package. The MIC5397
and MIC5399 include an auto-discharge circuit for each
LDO output, which is activated when the output is
disabled. The MIC5398 and MIC5399 have an internal
pull-down resistor on the enable pin to ensure that the
output is disabled if the control signal is tri-stated. The
MIC5396/7/8/9 regulator is fully protected from damage
due to fault conditions using linear current limiting and
thermal shutdown.
Input Capacitor
The MIC5396/7/8/9 is a high-performance, high-
bandwidth device. An input capacitor of 1µF is required
from the input pin to ground to provide stability. Low-
ESR ceramic capacitors provide optimal performance in
a small board area. Additional high-frequency
capacitors, such as small-valued NPO dielectric type
capacitors, help filter out high-frequency noise and are
good practice in any RF-based circuit. X5R or X7R
dielectrics are recommended for the input capacitor. Y5V
dielectrics lose most of their capacitance over
temperature and are therefore not recommended.
Output Capacitor
The MIC5396/7/8/9 requires an output capacitor of 1µF
or greater to maintain stability. The design is optimized
for use with low-ESR cera m ic c hip capacit ors. Hi gh-ESR
capacitors may cause high frequency oscillation. The
output capacitor can be increased, but performance has
been optimized for a 1µF ceramic output capacitor and
does not improve significantly with larger capacitance.
X7R and X5R dielectric ceramic capacitors are
recommended because of their temperature
performance. X7R capacitors change capacitance by
15% over their operating tem perature range and are the
most stable type of ceramic capacitors. Z5U and Y5V
dielectric capacitors change value by as much as 50%
and 60%, respectively, over their operating temperature
ranges. To use a ceramic chip capacitor with Y5V
dielectric the value must be much higher than an X7R
ceramic capacitor to ensure the same minimum
capacitance over the equivalent operating temperature
range.
No Load Stability
Unlik e man y other volta ge regu lators, t he MI C5396/7 /8/9
will remain stable and in regulation with no load.
Enable/Shutdown
The MIC5396/7/8/9 comes with two active-high enable
pins that allow each regulator to be disabled
independently. Forcing the enable pin low disables the
regulator and sends it into an off mode current state
drawing virtually zero current. When disabled, the
MIC5397 and MIC5399 switch an internal 25Ω load on
the regulator output to discharge the external capacitor.
Forcing the enable pin high enables the output voltage.
The MIC5396 and MIC5397 active-high enable pin uses
CMOS technology and cannot be left floating. A floating
enable pin may cause an indeterminate state on the
output. The MIC5398 and MIC5399 have an internal
pull-down r esis t or on th e e nab le pin to d isabl e t he output
when the enable pin is float ing.
Thermal Considerations
The MIC5396/7/8/9 is designed to provide two 300mA
continuous current outputs in a very small package.
Maximum operating temperature can be calculated
based on the output currents and the voltage drop
across the part. For exam ple, if the inp ut volt age is 3.6 V,
VOUT1 = 3.3V, VOUT2 = 2.8V, each with an output current
of 300mA. The actual power dissipation of the regulator
circuit can be determined using the equation:
PD = (VIN – VOUT1) IOUT1 + (VIN – VOUT2) I OUT2 + VIN IGND
Because this is a CMOS device and the ground current
is typically <100µA over the load range, the power
dissipation contributed by the ground current is <1%
which can be ignored for this calculation.
PD = (3.6V – 3.3V) × 300mA + (3.6V – 2.8V) × 300mA
PD = 0.33W
To determine the maximum ambient operating
temperature of the pack age, use the junction to ambient
thermal resistance of the device and the following basic
equation:
−
=
JA
AJ(MAX)
D(MAX)
θ
TT
P
TJ(MAX) = 125°C
θJA = 172.6°C/W
Micrel, Inc.
MIC5396/7/8/9
December 2012
9 M9999-120712-A
Substituting PD for PD(MAX) and solving for the ambient
operating temperature gives the maximum operating
conditions for the regulator circuit. The junction to
ambient thermal resistance for the minimum footprint is
172.6°C/W.
For proper operation, do not exceed the maximum
power dissipation.
For example, when operating a 3.3V/2.8V application
with an input voltage of 3.6V and 300mA at each output
with a minimum footprint layout, the maximum ambient
operating temperature TA can be determined as follows:
0.33W = (125°C – TA)/(172.6°C/W)
TA = 68.04°C
Therefore, a MIC5396-SMYMX application with 300mA
at each output current can accept an ambient operating
temperature of 68.04°C in a 1.6mm x 1.2mm Extra Thin
DFN package. For a full discussion of heat sinking and
thermal effects on voltage regulators refer to the
“Regulator Thermals” section of Micrel’s Designing with
Low-Dropout Voltage Regulators handbook. This
information can be found on Micrel's website at:
http://www.micrel.com/_PDF/other/LDOBk_ds.pdf
Micrel, Inc.
MIC5396/7/8/9
December 2012
10 M9999-120712-A
Typical Application Schematic
Bill of Materials
Item Part Number Manufacturer Description Qty.
C1, C2 C1608X5R0J106K TDK
(1)
Capacitor, 10µ F Cer ami c, 6.3V, X5R, Size 0603 2
C3, C4 C1005X5R1A105K TDK Capacitor, 1µF Ceramic, 10V, X5R, Size 0402 2
R1, R2 CR0603100KFKEA Vishay
(2)
Resistor, 100kΩ, 1/16W, Size 0603 2
U1 MIC5396/7/8/9-xxYMX Micrel, Inc.
(3)
Dual, 300mA LDO, Size 1.2mm × 1.6mm Extra Thin DFN 1
Notes:
1. TDK: www.tdk.com.
2. Vishay: www.vishay.com.
3. Micrel, Inc.: www.website.com.
Micrel, Inc.
MIC5396/7/8/9
December 2012
11 M9999-120712-A
PCB Layout Recommendations
Top Layer
Bottom Layer
Micrel, Inc.
MIC5396/7/8/9
December 2012
13 M9999-120712-A
MICREL, INC. 2180 FORTUNE DRIVE SAN JOSE, CA 95131 USA
TEL +1 (408) 944-0800 FAX +1 (408) 474-1000 WEB http://www.micrel.com
Micrel makes no representati ons or warranties with respect to the accuracy or completeness of the information furnished in this data sheet. This
informat i on is not intended as a warranty and Micrel does not assume responsibilit y for its use. Micrel reserves the right to change circuitry,
specificat i ons and descript i ons at any time without notice. No license, whether express , im plied, ar isi ng by estoppel or otherwise, t o any intellectual
property rights is granted by this document. Except as provided in Micrel’s term s and condit i ons of sale for such products, Micrel assumes no liabil ity
whatsoever, and Micrel disclaims any express or impli ed warranty relati ng to t he sale and/or use of Micrel products including liabil it y or warranties
relating to fitness for a particular purpose, merchantability, or infringem ent of any patent, copyright or other intel l ect ual property ri ght.
Micrel Products are not designed or authorized for use as components in life support applianc es, devic es or syst ems where malfuncti on of a product
can reasonably be expected to result in personal injury. Life support devices or systems are devices or syst ems that (a) are intended for surgical implant
into the body or (b) support or sustain life, and whose failure to perform can be reasonably expected to result in a signific ant inj ury t o the user. A
Purchaser’s use or sale of Micrel Products for use in life support applianc es, devices or syst ems is a Purchaser’s own risk and Purchaser agrees to fully
indemnify Micrel f or any damages resulting from such use or sale.
© 2012 Micrel, Incorporated.
Mouser Electronics
Authorized Distributor
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Micrel:
MIC5399-GMYMX TR MIC5399-GMYMX T5 MIC5397-GPYMX T5 MIC5396-P4YMT T5 MIC5397-GPYMX TR
MIC5399-SSYMX T5 MIC5399-SSYMX TR MIC5396-P4YMT TR MIC5399-SMYMT T5 MIC5399-MMYMX TR
MIC5399-SMYMX TR MIC5397-GPYMT T5 MIC5399-SMYMX T5 MIC5397-GPYMT TR MIC5399-GMYMT TR
MIC5399-MMYMT TR MIC5398-P4YMX T5 MIC5399-GMYMT T5 MIC5399-SGYMX T5 MIC5399-MMYMX T5
MIC5399-SGYMX TR MIC5399-SMYMT TR MIC5396-GMYMX TR MIC5396-GMYMX T5 MIC5398-P4YMX TR
MIC5399-MMYMT T5 MIC5397-GPYMT-TR MIC5396-GMYMX-TR MIC5399-GMYMT-TR MIC5399-SGYMX-TR
MIC5397-GPYMX-T5 MIC5399-MMYMX-T5 MIC5399-GMYMX-T5 MIC5399-SGYMX-T5 MIC5396-P4YMT-TR
MIC5397-GPYMX-TR MIC5396-GMYMX-T5 MIC5399-GMYMX-TR MIC5396-P4YMT-T5 MIC5399-SSYMX-TR
MIC5399-SMYMX-T5 MIC5399-MMYMT-TR MIC5397-GPYMT-T5 MIC5399-GMYMT-T5 MIC5399-SMYMT-T5
MIC5398-P4YMX-TR MIC5399-SMYMT-TR MIC5399-MMYMX-TR MIC5399-SSYMX-T5 MIC5399-MMYMT-T5
MIC5398-P4YMX-T5 MIC5399-SMYMX-TR
