Zetex (Now Diodes) ZTR250C02, ZTR250F02, ZTR250Z02, ZTR500C02, ZTR500F02, ZTR500Z02 Schematic [ru]

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

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				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

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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

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