Zetex ZMR250C, ZMR250F, ZMR25HC, ZMR25HF, ZMR500C Datasheet

FIXED 2.5 AND 5 VOLT		ZMR SERIES
MINIATURE VOLTAGE REGULATORS
ISSUE 4 - MARCH 2002
DEVICE DESCRIPTION	FEATURES

The ZMR series of three terminal fixed positive voltage regulators feature internal current limit and will shut down under thermal overload conditions making the devices difficult to destroy.

The circuit design offers an exceptionally low quiescent current, only 30 A 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 is designed with space saving in mind and is available in the small outline SOT23 package. The device is also available in through hole TO92 package.

•Small outline SOT23 package

•TO92 package

•2.5V and 5V output

•22.5V maximum input voltage (ZMR25H)

•25V maximum input voltage (ZMR50H)

•Output current up to 50mA

•Very low Quiesent current (30 A)

•Unconditionally stable

•Other output voltages possible

•Internal short circuit current limit

VOLTAGE RANGE

ZMR250 2.5V

ZMR500 5.0V

ZMR25H 2.5V

ZMR50H 5.0V

SCHEMATIC DIAGRAM

Vin

Vout

Gnd

ZMR SERIES

ABSOLUTE MAXIMUM RATINGS

Input voltage (ZMR25H)	22.5V	ZMR250	20V
(ZMR50H)	25V	ZMR500	20V
Package power dissipation		SOT23	500mW (Note 3)
(Tamb=25 °C)		TO92	600mW
Output current (IO)		100mA
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 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 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.

ZMR25H

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 22.5V	2.360		2.640	V
		IO=0 to 50mA
		Tj=-55 to 125°C
∆VO	Line Regulation	Vin=4.5 to 22.5V		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	A
∆ls	Supply Current Change	IO=0 to 50mA		1	±10	A
		Vin=4.5 to 22.5V		2	10	A
Vn	Output Noise Voltage	f=10Hz to 10KHz		65		V 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

ZMR SERIES

ZMR50H

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 25V	4.780		5.175	V
		IO=0 to 50mA
		Tj=-55 to 125°C
∆VO	Line Regulation	Vin=7 to 25V		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	A
∆ls	Supply Current Change	IO=0 to 50mA		1	±10	A
		Vin=7 to 25V		2	10	A
Vn	Output Noise Voltage	f=10Hz to 10KHz		90		V 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