FIXED 2.5 AND 5VOLT
MINATURE VOLTAGE REGULATORS I_a!!al
ISSUE 2- OCTOBER 1995
DEVICE DESCRIPTION
The ZMR250 and 500 three terminal fixed
positive voltage regulators feature internel
current limit and will shut down under thermal
overload conditions making the devices
almost impossible to destroy.
The circuit design offers an exceptionally small
quiescent current, only 30@4 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 adrive capability up to 50mA,
however, the flexible design will allow other
voltage selections to be made.
The device was designed with space saving in
mind and so is available in the small outline
SOT23 package. This tiny package is ideal for
applications where space is restricted. The
device is also available in the through hole
T092 package.
FEATURES
.Small outline SOT23 package
●T092 package
●2.5V and 5V
●Output current up to 50mA
●Very low Quiesent current (30pA)
●Uncond~ionally stable
.Other output voltages possible
.Internal short circuit current Iimit
VOLTAGE RANGE
ZMR250 2.5V
ZMR500 5V
Contact Zetex Marketing for availabiiii of
other voltages
SCHEMATIC DIAGRAM
1
m
2-7
CONNECTION TABLE
B
Pin SOT223 T092
1Gnd In
2In Gnd
3out out
Pack Fc
see Diagrams Page 2-5
ZMR250
ZMR500
ABSOLUTE MAXIMUM RATINGS
Input voltage 20V
Package power dissipation SOT23 500mW (Note 3)
(Tatnt)=25 ‘C) T092 600mW
Output current (Io) 200mA
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 T,~tF1250C.
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 excead 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
aceramic substrate measuring 15 x 15 x 0.6mm.
ZMR250
ELECTRICAL CHARACTERISTICS
TEST CONDITIONS (Unless otherwise stated) :Tj=250C, lo=lOmA, Vin=6.5V
SYMBOL PARAMETER CONDITIONS MIN. TYP. MAX. UNITS
V. Output Voltage 2.438 2.5 2.563 v
l.=O to 50mA 2.360 2.640 v
T.=-55 to 125°C
vi”=4,5 to 20V 2.360 2.640 v
l.=O to 50mA
T.=-55 to 125°C
AVO Line Regulation Vin=4.5 to 20V 515 mV
AVO Load Regulation l.=O to 50mA 20 30 mV
l.=O to 10mA 12 mV
Iq Quiescent Current Ti=-55 to 125°C 30 40 G
Alq Quiescent Current Change l.=O to 50mA 1ilo PA
vin=4.5 to 20V 210 I@
v“ Output Noise Voltage f=lOHz to IOKHZ 65 pV rms
AViJAVo Ripple Rejection Vin=6.3 to 113V
f=120Hz 55 75 dB
V,n Input Voltage Required To
Maintain Regulation 4.2 3.9 v
AVdAT Average Temperature lo=5.0mA
Coefficient of V. Tj=-55 to 125°C 0.275 0.700 mVPC
2-8
ZMR250
ZMR500
ZMR500
ELECTRICAL CHARACTERISTICS
TEST CONDITIONS (Unless otherwise stated) :Tj=25”C, 10=lOmA, Vin=lOV
;YMBOL PARAMETER CONDITIONS MIN. TYP. MAX. UNITS
V. Output Voltage 4.875 55,125 v
l.=O to 50mA 4.780 5.160 v
Tj=-55 to 125°C
vin=7 to 20V 4.780 5.175 v
l.=O to 50mA
Tj=-55 to 125°C
AVO Line Regulation vin=7 to 20V 5 15 mV
AVO Load Regulation l.=O to 50mA 25 40 mV
l.=O to 10mA 15 mV
Iq Quiescent Current Tj=-55 to 125°C 50 70 VA
Alq Quiescent Current Change l.=O to 50mA 1+10 LA
v,n=7 to 20V 210 VA
v“ Output Noise Voltage f=l OHz to IOKHZ 90 WV rms
AViJAVo Ripple Rejection Vin=8 to 18V 55 72
f=120Hz dB
V,n Input Voltage Required To
Maintain Regulation -1 6.7 v
AVdAT Average Temperature lo=5.0mA
Coefficient of V. Tj=-55 to 125°C 0.275 0.700 mVpC
2-9
TYPICAL CHARACTERISTICS
ZMR250
ZMR500
3ZE33?I
–50 –25 0 25 50 73 100 25
Temperature -(“C)
Output Voltage vTemperature Coefficient
I,, I1I
–50 –25 0 25 50 75 100 125
Temperature (“C)
Quiescent Current vTemperature
50
49
48
47
30
29
28
B
27 .
0, 113 100
Output Current -(mA)
IQuiescent Current vOutput Current
60
~50
Edo
E
zJO
i
20
3 0
02&88 10 12 !. 18 ,r3 20
Input Voltage (V)
Quiescent Current vInput VoltsgS
60 IIIwo
I
\1+ VIN=VO+4 /
56
52
48
.!4
40
–50 -25 025 50 75 100 !25
Temperature -(“C)
Quiescent Current vTemperature
2.5
2.0
1.5
1.0
0.5
D
-50 -25 025 50 75 100 125
Temperature (“C)
Drop-Out Voltage vTemperature
2-1o
TYPICAL CHARACTERISTICS
ZMR250
ZMR500
2-11
