Zetex (Now Diodes) ZTR250C02, ZTR250F02, ZTR250Z02, ZTR500C02, ZTR500F02 Schematic [ru]
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FIXED 2.5 AND 5 VOLT
3-TERMINAL VOLTAGE REFERENCES
ISSUE 4 - MARCH 1998
ZTR250
ZTR500
DEVICE DESCRIPTION
The ZTR250 and ZTR500 are precision three
terminal references. These devices are ideal
for battery powered applications where
power saving is important. They offer low
power alternatives to other two terminal
shunt references.
The ZTR devices do not require an external
resistor and, in contrast to two terminal
references, waste none of the battery power
as load current varies. The ZTR only
consumes 30µA supply current.
The two devices require as low as 1.4 volts
between input and output for regulation.
Output voltage tolerance is ± 2.5%, with a
voltage variation of 0.275mV/°C over the
-55°C to 125°C operating range.
SCHEMATIC DIAGRAM
FEATURES
Small outline SOT23 and SOT89
•
packages
TO92 package
•
2.5V and 5V output
•
2.5% tolerance
•
Supply current independent of input
•
voltage over temperature
Output current up to 50mA
•
Very low supply current (30µA)
•
Unconditionally stable
•
Internal short circuit current limit
•
APPLICATIONS
Battery Powered Systems
•
Portable and Hand Held Equipment
•
Instrumentation
•
Metering
•
Vin
Vout
Gnd
4-388
ZTR250
ZTR500
ABSOLUTE MAXIMUM RATINGS
Input Voltage 20V
Output current (I
) 200mA
O
Operating temperature -55 to 125°C
Storage temperature -65 to 150°C
Power Dissipation (T
SOT23 500mW
TO92 600mW
SOT89 1.5W
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
2. The following data represents pulse test conditions with junction temperatures as indicated at the initiation
of the test. Continuous o peration of the devices with the stated conditions might exceed the po wer dissipation
limits of the chosen package.
3. This device does not contain a thermal shutdown circuit so care should be taken not to exceed the stated
maximum power dissipation rating.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.
amb
=125°C.
ZTR250
ELECTRICAL CHARACTERISTICS
TEST CONDITIONS (Unless otherwise stated):T
SYMBOL PARAMETER CONDITIONS MIN. TYP. MAX. UNITS
V
Output Voltage 2.438 2.5 2.563 V
O
I
=0 to 50mA
O
T
=-55 to 125°C
j
V
=4.5 to 20V
in
I
=0 to 50mA
O
T
=-55 to 125°C
j
∆V
Line Regulation Vin=4.5 to 20V 5 15 mV
O
∆V
Load Regulation IO=0 to 50mA
O
l
s
∆l
s
V
n
∆Vin/∆V
V
in
∆VO/∆T
Supply Current Tj=-55 to 125°C 30 40
Supply Current Change IO=0 to 50mA
Output Noise Voltage f=10Hz to 10kHz 65
Ripple Rejection Vin=6.3 to 18V
O
Input Voltage Required
To Maintain Regulation 4.2 3.9 V
Average Temperature
Coefficient of V
O
I
=0 to 10mA
O
V
=4.5 to 20V
in
f=120Hz 55 75 dB
IO=5.0mA
T
=-55 to 125°C 0.275 0.700 mV/°C
j
=25°C, IO=10mA, Vin=6.5V
j
2.360 2.640 V
2.360 2.640 V
20
12
1
2
amb
= 25°C, T
=150 °C)
jmax
30 mV
mV
µA
±10
10
µA
µA
µV
(rms)
4-389
ZTR250
ZTR500
ZTR500
ELECTRICAL CHARACTERISTICS
TEST CONDITIONS (Unless otherwise stated):T
SYMBOL PARAMETER CONDITIONS MIN. TYP. MAX. UNITS
V
Output Voltage 4.875 5 5.125 V
O
I
=0 to 50mA
O
T
=-55 to 125°C
j
V
=7 to 20V
in
I
=0 to 50mA
O
T
=-55 to 125°C
j
∆V
Line Regulation Vin=7 to 20V 5 15 mV
O
∆V
Load Regulation IO=0 to 50mA
O
l
s
∆l
s
V
n
∆Vin/∆V
V
in
∆VO/∆T
Supply Current Tj=-55 to 125°C 50 70
Supply Current Change IO=0 to 50mA
Output Noise Voltage f=10Hz to 10kHz 90
Ripple Rejection Vin=8 to 18V
O
Input Voltage Required
To Maintain Regulation 7 6.7 V
Average Temperature
Coefficient of V
O
I
=0 to 10mA
O
V
=7 to 20V
in
f=120Hz
IO=5.0mA
=-55 to 125°C 0.275 0.700 mV/°C
T
j
=25°C, IO=10mA, Vin=10V
j
4.780 5.160 V
4.780 5.175 V
25
40 mV
15
1
2
±10
10
55 72
mV
µA
µA
µA
µV
(rms)
dB
4-390
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