Semtech Corporation EZ1583CT-2.5, EZ1583CT-1.5, EZ1583CT, EZ1583CM.TR, EZ1583CM-2.5.TR Datasheet

	DUAL INPUT	EZ1580/EZ1581
	LOW DROPOUT REGULATOR	EZ1582/EZ1583
February 26, 1999	TEL:[phone] FAX:[phone] WEB:http://www.semtech.com

DESCRIPTION

The EZ158X family of high performance positive voltage regulators are designed for use in applications requiring very low dropout voltage at 7, 5, 3 and 1.5 amps. When supplying 2.5V on motherboards where both 5V and 3.3V supplies are available, the superior dropout characteristics of the EZ158X result in reduced heat dissipation compared to regular LDOs, thus allowing heat sink size reduction. Additionally, the EZ158X provides excellent regulation over variations in line, load and temperature. Remote sense operation allows compensating for trace, connector and other resistive losses.

Outstanding features include very low dropout performance at rated current, fast transient response, remote sense, internal current limiting, thermal shutdown and safe operating area protection of the output device. The EZ158X is a five terminal adjustable voltage regulator available in the popular 5 pin TO-220 and TO-263 plastic packages.

ORDERING INFORMATION

DEVICE	PACKAGE	IOUT (A)	VOUT (V)
EZ1580CT-X.X	TO-220,	7	See Note (1)
EZ1581CT-X.X	5-pin	5
EZ1582CT-X.X		3
EZ1583CT-X.X		1.5
EZ1580CM-X.X	TO-263,	7	See Note (1)
	5-pin(2)
EZ1581CM-X.X		5
EZ1582CM-X.X		3
EZ1583CM-X.X		1.5

Notes:

(1)Where -X.X denotes voltage options. Available voltages are: 1.5V and 2.5V. Leave blank for adjustable version (1.3 to 5.7V).

(2)Add suffix ‘TR’ for tape and reel (TO-263).

FEATURES

•540mV dropout @ 7A in dual supply mode (EZ1580)

•Remote sense operation

•Fast transient response

•0.5% initial accuracy

•5 Pin TO-220 and TO-263 packages

APPLICATIONS

•Microprocessor supplies

•Split plane microprocessor supplies

•Pentium® Processor P54C and P55C

•PowerPC™ 603/604EV

•AMD5K86™, AMD K6

BLOCK DIAGRAM

ABSOLUTE MAXIMUM RATINGS

Parameter	Symbol	Maximum	Units
Input Voltage	VP	7	V
VPOWER
VCONTROL	VC	13.2
Power	PD	Internally	W
Dissipation		Limited
Thermal Resistance
Junction to Case		2
EZ1580/1 TO-220	θ JC		°C/W
EZ1580/1 TO-263		2
EZ1582/3 TO-220		3
EZ1582/3 TO-263		3
Thermal Resistance
Junction to Ambient		50	°C/W
EZ158X TO-220	θ JA
EZ158X TO-263		60
Operating Junction	TJ	0 to 125	°C
Temperature Range
Storage Temperature
Range	TSTG	-65 to 125	°C
Lead Temperature	TLEAD	260	°C
(Soldering) 10 Sec.

Pentium is a registered trademark of Intel Corporation.

PowerPC is a trademark of IBM.

AMD5K86 and K6 are trademarks of Advanced Micro Devices. 1

© 1999 SEMTECH CORP.

652 MITCHELL ROAD NEWBURY PARK CA 91320

				DUAL INPUT	EZ1580/EZ1581
				LOW DROPOUT REGULATOR	EZ1582/EZ1583

February 26, 1999

PIN CONFIGURATION

PIN DESCRIPTION

Pin	Pin Name	Pin Function
1	SENSE	This pin is the positive side of the reference voltage for this device. With this pin it is possible to
		Kelvin sense the output voltage at the load.
2	ADJUST /	This pin is the negative side of the reference voltage for the device. Transient response can be
		improved by adding a small bypass capacitor from the adjust pin to ground.
	GROUND	This pin is the bottom end of the internal resistor feedback chain for fixed output voltage parts,
		and should be connected to ground.
3	OUTPUT	This is the power output of the device, and is electrically connected to the TAB.
4	CONTROL	This pin is the supply pin for the control circuitry for the device. The current flow into this pin will
		be approximately 1% of the output current. For the device to regulate, the voltage at this pin must
		be between 1.0V and 1.3V greater than the output voltage (see dropout specifications).
5	POWER	This is the collector input to the power device of the EZ158X. The output load current is supplied
		through this pin. For the device to regulate, the voltage on this pin must be between 0.1V and
		0.7V greater than the output voltage, depending upon load current (see dropout specifications).

2

© 1999 SEMTECH CORP.

652 MITCHELL ROAD NEWBURY PARK CA 91320