FIXED 2.5 AND 5 VOLT
MINIATURE VOLTAGE REGULATORS
ISSUE 3- FEBRUARY 1998
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 as well as SOT89 for higher
power applications. The SOT23 package is
ideal for applications where space is
restricted. The device is also available in
through hole TO92 package.
ZMR SERIES
FEATURES
•
•
•
•
•
•
•
•
•
•
Small outline SOT23 and SOT89
packages
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
SOT89
1.5W (Note 3)
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 and SOT89 packages, 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
∆l
s
V
n
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
∆V
in
/∆V
O
Ripple Rejection
V
in
∆V
O
/∆T
Input Voltage Required
To Maintain Regulation
Average Temperature
Coefficient of V
O
0.700
mV/°C
DSP and ARM Processors
京公网安备 11010802033920号
EEWORLD
