FIXED 2.5 AND 5 VOLT
MINIATURE VOLTAGE REGULATORS
ISSUE 4 - MARCH 2002
DEVICE DESCRIPTION
The ZMR series of three terminal fixed
positive voltage regulators feature internal
current limit and will shut down under
thermal overload conditions making the
devices difficult to destroy.
The circuit design offers an exceptionally
low quiescent current, only 30µA for the 2.5
volt device, ideal for low power applications.
The initial devices in the series regulate to
2.5 or 5 volts with a drive capability up to
50mA, however, the flexible design will
allow other voltage selections to be made.
The device is designed with space saving in
mind and is available in the small outline
SOT23 package. The device is also available
in through hole TO92 package.
FEATURES
•Small outline SOT23 package
•TO92 package
•2.5V and 5V output
•22.5V maximum input voltage
(ZMR25H)
•25V maximum input voltage (ZMR50H)
•Output current up to 50mA
•Very low Quiesent current (30µA)
•Unconditionally stable
•Other output voltages possible
•Internal short circuit current limit
VOLTAGE RANGE
ZMR250 2.5V
ZMR500 5.0V
ZMR25H 2.5V
ZMR50H 5.0V
Vin
Vout
Gnd
SCHEMATIC DIAGRAM
ZMR SERIES
4-104
ABSOLUTE MAXIMUM RATINGS
Input voltage (ZMR25H) 22.5V ZMR250 20V
(ZMR50H) 25V ZMR500 20V
Package power dissipation SOT23 500mW (Note 3)
(Tamb=25 °C) TO92 600mW
Output current (IO) 100mA
Operating temperature -55 to 125°C
Storage temperature -65 to 150°C
Note:
1. The maximum operating input voltage and output current of the device will be governed by
the maximum power dissipation of the selected package. Maximum package power dissipation
is specified at 25 °C and must be linearly derated to zero at Tamb =125°C.
2. The following data represents pulse test conditions with junction temperatures as indicated at
the initiation of the test. Continuous operation of the devices with the stated conditions might
exceed the power dissipation limits of the chosen package.
3. Maximum power dissipation for the SOT23 package, is calculated assuming that the device is
mounted on a ceramic substrate measuring 15 x 15 x 0.6mm.
ZMR25H
ELECTRICAL CHARACTERISTICS
TEST CONDITIONS (Unless otherwise stated):Tj=25°C, IO=10mA, Vin=6.5V
SYMBOL PARAMETER CONDITIONS MIN. TYP. MAX. UNITS
VOOutput Voltage 2.438 2.5 2.563 V
IO=0 to 50mA
Tj=-55 to 125°C
2.360 2.640 V
Vin=4.5 to 22.5V
IO=0 to 50mA
Tj=-55 to 125°C
2.360 2.640 V
∆VOLine Regulation Vin=4.5 to 22.5V 5 15 mV
∆VOLoad Regulation IO=0 to 50mA
IO=0 to 10mA
20
12
30 mV
mV
lsSupply Current Tj=-55 to 125°C3040
µA
∆lsSupply Current Change IO=0 to 50mA
Vin=4.5 to 22.5V
1
2±10
10 µA
µA
VnOutput Noise Voltage f=10Hz to 10KHz 65 µV rms
∆Vin /∆VORipple Rejection Vin=6.3 to 18V
f=120Hz 55 75 dB
Vin Input Voltage Required
To Maintain Regulation 4.2 3.9 V
∆VO /∆TAverage Temperature
Coefficient of VO
IO=5.0mA
Tj=-55 to 125°C 0.275 0.700 mV/°C
ZMR SERIES
4-105
ZMR50H
ELECTRICAL CHARACTERISTICS
TEST CONDITIONS (Unless otherwise stated):Tj=25°C, IO=10mA, Vin=10V
SYMBOL PARAMETER CONDITIONS MIN. TYP. MAX. UNITS
VOOutput Voltage 4.875 5 5.125 V
IO=0 to 50mA
Tj=-55 to 125°C
4.780 5.160 V
Vin=7 to 25V
IO=0 to 50mA
Tj=-55 to 125°C
4.780 5.175 V
∆VOLine Regulation Vin=7 to 25V 5 15 mV
∆VOLoad Regulation IO=0 to 50mA
IO=0 to 10mA
25
15
40 mV
mV
lsSupply Current Tj=-55 to 125°C5070
µA
∆lsSupply Current Change IO=0 to 50mA
Vin=7 to 25V
1
2±10
10 µA
µA
VnOutput Noise Voltage f=10Hz to 10KHz 90 µV rms
∆Vin /∆VORipple Rejection Vin=8 to 18V
f=120Hz
55 72
dB
Vin Input Voltage Required
To Maintain Regulation 7 6.7 V
∆VO /∆TAverage Temperature
Coefficient of VO
IO=5.0mA
Tj=-55 to 125°C 0.275 0.700 mV/°C
ZMR SERIES
4-106
ZMR250
ELECTRICAL CHARACTERISTICS
TEST CONDITIONS (Unless otherwise stated):Tj=25°C, IO=10mA, Vin=6.5V
SYMBOL PARAMETER CONDITIONS MIN. TYP. MAX. UNITS
VOOutput Voltage 2.438 2.5 2.563 V
IO=0 to 50mA
Tj=-55 to 125°C
2.360 2.640 V
Vin=4.5 to 20V
IO=0 to 50mA
Tj=-55 to 125°C
2.360 2.640 V
∆VOLine Regulation Vin=4.5 to 20V 5 15 mV
∆VOLoad Regulation IO=0 to 50mA
IO=0 to 10mA
20
12
30 mV
mV
lsSupply Current Tj=-55 to 125°C3040
µA
∆lsSupply Current Change IO=0 to 50mA
Vin=4.5 to 20V
1
2±10
10 µA
µA
VnOutput Noise Voltage f=10Hz to 10KHz 65 µV rms
∆Vin /∆VORipple Rejection Vin=6.3 to 18V
f=120Hz 55 75 dB
Vin Input Voltage Required
To Maintain Regulation 4.2 3.9 V
∆VO /∆TAverage Temperature
Coefficient of VO
IO=5.0mA
Tj=-55 to 125°C 0.275 0.700 mV/°C
ZMR SERIES
4-107
ZMR500
ELECTRICAL CHARACTERISTICS
TEST CONDITIONS (Unless otherwise stated):Tj=25°C, IO=10mA, Vin=10V
SYMBOL PARAMETER CONDITIONS MIN. TYP. MAX. UNITS
VOOutput Voltage 4.875 5 5.125 V
IO=0 to 50mA
Tj=-55 to 125°C
4.780 5.160 V
Vin=7 to 20V
IO=0 to 50mA
Tj=-55 to 125°C
4.780 5.175 V
∆VOLine Regulation Vin=7 to 20V 5 15 mV
∆VOLoad Regulation IO=0 to 50mA
IO=0 to 10mA
25
15
40 mV
mV
lsSupply Current Tj=-55 to 125°C5070
µA
∆lsSupply Current Change IO=0 to 50mA
Vin=7 to 20V
1
2±10
10 µA
µA
VnOutput Noise Voltage f=10Hz to 10KHz 90 µV rms
∆Vin /∆VORipple Rejection Vin=8 to 18V
f=120Hz
55 72 dB
Vin Input Voltage Required
To Maintain Regulation 7 6.7 V
∆VO /∆TAverage Temperature
Coefficient of VO
IO=5.0mA
Tj=-55 to 125°C 0.275 0.700 mV/°C
ZMR SERIES
4-108
-50 -25 025 50 75 100 125
-50 -25 025 50 75 100 125
2.5
2.0
1.5
1.0
0.5
0
Drop-Out Voltage (V)
Drop-Out Voltage v Temperature
Quiescent Current v Temperature
-50 -25 025 50 75 100 125
Temperature (°C)
Output Voltage Temperature
0
20
40
2468
10 12 14 16 18 20
60
10
30
50
Input Voltage (V)
Quiescent Current v Voltage
28
0.1 110 100
27
29
47
48
49
50
30
75
Quiescent Current v Temperature
Quiescent Current
(µA)
-50 -25
26
28
02550
32
30
34
125100 40
44
48
52
56
60
Output Current Temperature (°C)
Temperature (°C) Temperature (°C)
5.00
5.02
4.98
4.96
2.50
2.48
2.46
2.52
ZMR50H
ZMR25H
Output Voltage
Quiescent Current v Output Current
Io=5mA
Vin=Vo+4
Io=5mA
Vin=Vo+4
Io=10mA
Io=0
Vin=Vo+4
Io=0
Vin=V o+4
Io=0
Vin=Vo+4
Io=0
Vin=Vo+4
Io=10mA
TYPICAL CHARACTERISTICS
Quiescent Current (µA) Quiescent Current (µA)
Quiescent Current (µA)
ZMR25H
ZMR50H
ZMR25H ZMR50H
ZMR25H
ZMR25H
ZMR50H
ZMR50H
ZMR SERIES
4-109
0
Time (µs) Line Transient Response
Load Current
01020
30 40 50
Time (µs)
Output Voltage Deviation (V)
Load Transient Response
0
10
20
30
40
50
60
70
80
90
10 100 1K 10K 100K
Ripple Frequency (Hz)
Ripple Rejection (dB)
100 1K 10K 100K
10
1.0
0.1
0.01
Frequency (Hz)
Output Impedance (Ω)
I = 10mA
V = V + 4V
O
IN OUT
Output Impedance v Frequency Ripple Rejection v Ripple Frequency
ZMR50H
ZMR25H
ZMR50H
ZMR25H
ZMR25H
ZMR50H
20 40 60 80 100
0
10mA
ZMR50H
ZMR25H
Vin
0
-0.4
0
-0.4
0.4
0.4
0V
5V
0
0.4
-0.4
0
-0.4
0.4
Output Voltage Deviation (V)
0
1
2
Power Dissipation
Power Dissipation
800
600
400
200
0
Power Derating Power Derating
TO92
(mW)
(mW)
o
I = 2mA
-50 -25 025 50 75 100 125
Temperature (°C)
-50 -25 025 50 75 100 125
Temperature (°C)
Io= 10mA
SOT23
Surface Mount Devices Through Hole Device
TYPICAL CHARACTERISTICS
COUT=0
VIN=V o+4
dVIN/dt=5V/µs
COUT=0
VIN=V o+4
dIo/dt=1A/µs
ZMR SERIES
4-110
-50 -25 025 50 75 100 125
-50 -25 025 50 75 100 125
2.5
2.0
1.5
1.0
0.5
0
Drop-Out Voltage (V)
Drop-Out Voltage v Temperature
Quiescent Current v Temperature
-50 -25 025 50 75 100 125
Temperature (°C)
Output Voltage Temperature
0
20
40
2468
10 12 14 16 18 20
60
10
30
50
Input Voltage (V)
Quiescent Current v Voltage
28
0.1 110 100
27
29
47
48
49
50
30
75
Quiescent Current v Temperature
Quiescent Current
(µA)
-50 -25
26
28
02550
32
30
34
125100 40
44
48
52
56
60
Output Current Temperature (°C)
Temperature (°C) Temperature (°C)
5.00
5.02
4.98
4.96
2.50
2.48
2.46
2.52
ZMR500
ZMR250
Output Voltage
Quiescent Current v Output Current
Io=5mA
Vin=Vo+4
Io=5mA
Vin=Vo+4
Io=10mA
Io=0
Vin=Vo+4
Io=0
Vin=V o+4
Io=0
Vin=Vo+4
Io=0
Vin=Vo+4
Io=10mA
TYPICAL CHARACTERISTICS
Quiescent Current (µA) Quiescent Current (µA)
Quiescent Current (µA)
ZMR250
ZMR500
ZMR250 ZMR500
ZMR250
ZMR250
ZMR500
ZMR500
ZMR SERIES
4-111
0
Time (µs) Line Transient Response
Load Current
01020
30 40 50
Time (µs)
Output Voltage Deviation (V)
Load Transient Response
0
10
20
30
40
50
60
70
80
90
10 100 1K 10K 100K
Ripple Frequency (Hz)
Ripple Rejection (dB)
100 1K 10K 100K
10
1.0
0.1
0.01
Frequency (Hz)
Output Impedance (Ω)
I = 10mA
V = V + 4V
O
IN OUT
Output Impedance v Frequency Ripple Rejection v Ripple Frequency
ZMR500
ZMR250
ZMR500
ZMR250
ZMR250
ZMR500
20 40 60 80 100
0
10mA
ZMR500
ZMR250
Vin
0
-0.4
0
-0.4
0.4
0.4
0V
5V
0
0.4
-0.4
0
-0.4
0.4
Output Voltage Deviation (V)
0
1
2
Power Dissipation
Power Dissipation
800
600
400
200
0
Power Derating Power Derating
TO92
(mW)
(mW)
o
I = 2mA
-50 -25 025 50 75 100 125
Temperature (°C)
-50 -25 025 50 75 100 125
Temperature (°C)
Io= 10mA
SOT23
Surface Mount Devices Through Hole Device
TYPICAL CHARACTERISTICS
COUT=0
VIN=Vo+4
dVIN/dt=5V/µs
COUT=0
VIN=V o+4
dIo/dt=1A/µs
ZMR SERIES
4-112
ORDERING INFORMATION
CONNECTION DIAGRAMS
Part Number Package Part Mark
ZMR250C TO92 ZMR250
ZMR250F SOT23 25K
ZMR25HC T092 ZMR25H
ZMR25HF SOT23 25X
ZMR500C TO92 ZMR500
ZMR500F SOT23 50K
ZMR50HC TO92 ZMR50H
ZMR50HF SOT23 5OR
TO92 Package Suffix – C
Bottom View
SOT23 Package Suffix – F
Top View
ZMR SERIES
