Zetex (Now Diodes) ZTR250C02, ZTR250F02, ZTR250Z02, ZTR500C02, ZTR500F02, ZTR500Z02 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.

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

SCHEMATIC DIAGRAM

Vin

Vout

Gnd

4-388

 

 

 

 

ZTR250

 

 

 

 

ZTR500

ABSOLUTE MAXIMUM RATINGS

 

 

 

Input Voltage

20V

Power Dissipation (Tamb= 25°C, Tjmax=150 °C)

Output current (IO)

200mA

SOT23

500mW

Operating temperature

-55 to 125°C

TO92

600mW

Storage temperature

-65 to 150°C

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 Tamb=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 thepower 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.

ZTR250

ELECTRICAL CHARACTERISTICS

TEST CONDITIONS (Unless otherwise stated):Tj=25°C, IO=10mA, Vin=6.5V

SYMBOL

PARAMETER

CONDITIONS

MIN.

TYP.

MAX.

UNITS

 

 

 

 

 

 

 

 

VO

 

Output Voltage

 

2.438

2.5

2.563

V

 

 

 

IO=0 to 50mA

2.360

 

2.640

V

 

 

 

Tj=-55 to 125°C

 

 

 

 

 

 

 

Vin=4.5 to 20V

2.360

 

2.640

V

 

 

 

IO=0 to 50mA

 

 

 

 

 

 

 

Tj=-55 to 125°C

 

 

 

 

VO

Line Regulation

Vin=4.5 to 20V

 

5

15

mV

VO

Load Regulation

IO=0 to 50mA

 

20

30

mV

 

 

 

IO=0 to 10mA

 

12

 

mV

ls

 

Supply Current

Tj=-55 to 125°C

 

30

40

μA

ls

 

Supply Current Change

IO=0 to 50mA

 

1

±10

μA

 

 

 

Vin=4.5 to 20V

 

2

10

μA

Vn

 

Output Noise Voltage

f=10Hz to 10kHz

 

65

 

μV

 

 

 

 

 

 

 

(rms)

 

 

 

 

 

 

 

 

Vin/

VO

Ripple Rejection

Vin=6.3 to 18V

 

 

 

 

 

 

 

f=120Hz

55

75

 

dB

Vin

 

Input Voltage Required

 

 

 

 

 

 

 

To Maintain Regulation

 

4.2

3.9

 

V

 

 

 

 

 

 

 

 

VO/

T

Average Temperature

IO=5.0mA

 

 

 

 

 

 

Coefficient of VO

Tj=-55 to 125°C

 

0.275

0.700

mV/°C

4-389

ZTR250

ZTR500

ZTR500

ELECTRICAL CHARACTERISTICS

TEST CONDITIONS (Unless otherwise stated):Tj=25°C, IO=10mA, Vin=10V

SYMBOL

PARAMETER

CONDITIONS

MIN.

TYP.

MAX.

UNITS

 

 

 

 

 

 

 

 

VO

 

Output Voltage

 

4.875

5

5.125

V

 

 

 

 

 

 

 

 

 

 

 

IO=0 to 50mA

4.780

 

5.160

V

 

 

 

Tj=-55 to 125°C

 

 

 

 

 

 

 

Vin=7 to 20V

4.780

 

5.175

V

 

 

 

IO=0 to 50mA

 

 

 

 

 

 

 

Tj=-55 to 125°C

 

 

 

 

VO

Line Regulation

Vin=7 to 20V

 

5

15

mV

VO

Load Regulation

IO=0 to 50mA

 

25

40

mV

 

 

 

IO=0 to 10mA

 

15

 

mV

ls

 

Supply Current

Tj=-55 to 125°C

 

50

70

μA

 

 

 

 

 

 

 

 

ls

 

Supply Current Change

IO=0 to 50mA

 

1

±10

μA

 

 

 

Vin=7 to 20V

 

2

10

μA

Vn

 

Output Noise Voltage

f=10Hz to 10kHz

 

90

 

μV

 

 

 

 

 

 

 

(rms)

 

 

 

 

 

 

 

 

Vin/

VO

Ripple Rejection

Vin=8 to 18V

55

72

 

 

 

 

 

f=120Hz

 

 

 

dB

 

 

 

 

 

 

 

 

Vin

 

Input Voltage Required

 

 

 

 

 

 

 

To Maintain Regulation

 

7

6.7

 

V

 

 

 

 

 

 

 

 

VO/

T

Average Temperature

IO=5.0mA

 

 

 

 

 

 

Coefficient of VO

Tj=-55 to 125°C

 

0.275

0.700

mV/°C

4-390

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