FIXED 2.5 AND 5 VOLT
MINATURE VOLTAGE REGULATORS
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 a drive 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.
I_a!!al
FEATURES
.
Small outline SOT23 package
q
q
q
q
q
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
ZMR500
2.5V
5V
Contact Zetex Marketing
other voltages
for availabiiii
of
SCHEMATIC DIAGRAM
CONNECTION TABLE
Pin
1
B
1
G
nd
In
In
2
3
out
Pack
F
c
m
SOT223
T092
G
nd
out
see Diagrams Page 2-5
2-7
ZMR250
ZMR500
ABSOLUTE MAXIMUM
Input voltage
Package
power
dissipation
RATINGS
20V
SOT23
T092
500mW
(Note
3)
(Tatnt)=25 ‘C)
600mW
200mA
-55 to 125°C
-65 to 150”C
Output current (Io)
Operating temperature
Storage temperature
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
a ceramic substrate measuring 15 x 15 x 0.6mm.
Note:
The
1.
maximum
ZMR250
ELECTRICAL CHARACTERISTICS
TEST CONDITIONS (Unless otherwise stated) :Tj=250C, lo=lOmA, Vin=6.5V
SYMBOL
V.
PARAMETER
CONDITIONS
MIN.
TYP.
MAX.
UNITS
Output Voltage
l.=O to 50mA
T.=-55 to 125°C
vi”=4,5 to 20V
l.=O to 50mA
T.=-55 to 125°C
2.438
2.360
2.5
2.563
2.640
v
v
2.360
2.640
v
AVO
AVO
Iq
Line Regulation
Load Regulation
Vin=4.5
to 20V
5
20
12
30
1
2
65
15
mV
mV
mV
G
PA
I@
pV rms
l.=O to 50mA
l.=O to 10mA
Ti=-55 to 125°C
l.=O to 50mA
vin=4.5 to 20V
f=lOHz to IOKHZ
Vin=6.3 to 113V
f=120Hz
To
4.2
lo=5.0mA
Tj=-55 to 125°C
30
40
ilo
10
Quiescent
Quiescent
Current
Current Change
Alq
v“
Output Noise Voltage
Ripple Rejection
AViJAVo
V,n
55
75
dB
Input Voltage Required
Maintain Regulation
Average Temperature
Coefficient of V.
3.9
v
AVdAT
0.275
0.700
mVPC
2-8
ZMR250
ZMR500
TYPICAL CHARACTERISTICS
60
~
50
E
E
z
do
JO
3ZE33?I
20
i
3
0
–50
–25
0
25
50
73
100
25
02&88
10
12
!.
18
,r3
20
Temperature
- (“C)
Input Voltage
(V)
Output Voltage v Temperature Coefficient
Quiescent Current v Input VoltsgS
60
I
I
I
\
1+
Iwo
VIN=VO+4
/
56
52
48
.!4
I
–50
–25
0
,,
25
50
75
I
100
1
125
I
40
–50
-25
0
25
50
75
100
!25
Temperature
(“C)
Temperature
- (“C)
Quiescent Current v Temperature
Quiescent Current v Temperature
2.5
50
49
2.0
48
47
1.5
30
29
28
27
B
.
1.0
0.5
D
1
13
100
-50
-25
0
25
50
75
100
125
0,
Output
Current
- (mA)
Temperature
(“C)
I
Quiescent Current v Output Current
Drop-Out Voltage v Temperature
2-1o
Power technology
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