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.
ZMR SERIES
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
ZMR500
ZMR25H
ZMR50H
2.5V
5.0V
2.5V
5.0V
SCHEMATIC DIAGRAM
Vin
Vout
Gnd
4-104
ZMR SERIES
ABSOLUTE MAXIMUM RATINGS
Input voltage (ZMR25H)
(ZMR50H)
22.5V
25V
ZMR250
ZMR500
20V
20V
Package power dissipation
(T
amb
=25 °C)
Output current (I
O
)
Operating temperature
Storage temperature
SOT23 500mW (Note 3)
TO92
600mW
100mA
-55 to 125°C
-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 T
amb
=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):T
j
=25°C, I
O
=10mA, V
in
=6.5V
SYMBOL PARAMETER
V
O
CONDITIONS
MIN.
2.438
TYP.
2.5
MAX.
2.563
2.640
2.640
UNITS
V
V
V
Output Voltage
I
O
=0 to 50mA
T
j
=-55 to 125°C
V
in
=4.5 to 22.5V
I
O
=0 to 50mA
T
j
=-55 to 125°C
2.360
2.360
∆
V
O
∆
V
O
l
s
Line Regulation
Load Regulation
Supply Current
Supply Current Change
Output Noise Voltage
V
in
=4.5 to 22.5V
I
O
=0 to 50mA
I
O
=0 to 10mA
T
j
=-55 to 125°C
I
O
=0 to 50mA
V
in
=4.5 to 22.5V
f=10Hz to 10KHz
V
in
=6.3 to 18V
f=120Hz
55
4.2
I
O
=5.0mA
T
j
=-55 to 125°C
4-105
5
20
12
30
1
2
65
75
3.9
0.275
15
30
40
±10
10
mV
mV
mV
µA
µA
µA
µV
rms
dB
V
∆
l
s
V
n
∆
V
in
/
∆
V
O
Ripple Rejection
V
in
Input Voltage Required
To Maintain Regulation
Average Temperature
Coefficient of V
O
∆
V
O
/
∆
T
0.700
mV/°C
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