US1175

2-2

Rev. 1.2

11/29/99

ABSOLUTE MAXIMUM RATINGS

ABSOLUTE MAXIMUM RATINGS

Input Voltage (Vin)

........................................................... 6V

Control Input Voltage (Vctrl) .................................................. 14V

Power Dissipation............................................. Internally Limited

Storage Temperature Range ................................... -65

Operating Junction Temperature Range ..................... 0

PACKAGE INFORMATION

PACKAGE INFORMATION

8 PIN PLASTIC SOIC ( S )

5 PIN PLASTIC TO263 ( M )

5 PIN PLASTIC POWER FLEX (P)

ELECTRICAL SPECIFICATIONS

ELECTRICAL SPECIFICATIONS

Unless otherwise specified ,these specifications apply over ,Cin=1uF,Cout=10uF, and Tj=0 to 125

values refer to Tj=25

PARAMETER

SYM

TEST CONDITION

MIN

TYP

MAX

UNITS

Reference Voltage

Vref

Vctrl=2.75V,Vin=2V,Io=10mA

1.243

1.250

1.257

V

Tj=25,Vadj=0V

Vctrl=2.7to12V,Vin=2.05V to 5.5V, 1.237

1.250

1.263

Io=10mA to 7.5A,Vadj=0V

Line Regulation

Vctrl=2.5Vto7V,Vin=1.75Vto5.5V

,Io=10mA ,Vadj=0V

0.5

3

mV

Load Regulation (note 1)

Vctrl=2.75V,Vin=2.1V,Io=10mA

to 7.5A,Vadj=0V

2

6

mV

Dropout Voltage (note 2)

Vadj=0V for all conditions below.

(Vctrl - Vout)

Vin=2.05V,Io=1.5A

0.95

V

Vin=2.05V,Io=3A

1.00

Vin=2.05V,Io=5A

1.05

Vin=2.05V,Io=7.5A

1.15

1.30

Dropout Voltage (note 2)

Vadj=0V for all conditions below.

(Vin - Vout)

Vctrl=2.75V,Io=1.5A

0.100

0.130

V

Vctrl=2.75V,Io=3A

0.200

0.260

Vctrl=2.75V,Io=5A

0.330

0.430

Vctrl=2.75V,Io=7.5A

0.500

0.650

Current Limit

Vctrl=2.75V,Vin=2.05V,

dVo=100mV Vadj=0V

7.7

9

A

Minimum Load Current (note 3)

Vctrl=5V,Vin=3.3V,Vadj=0V,

5

10

mA

Thermal Regulation

30 mS Pulse

0.01

0.02

%/W

Ripple Rejection

Vctrl=5V,Vin=5V,Io=3A,Vadj=0V

60

70

dB

Tj=25,Vripple=1Vpp at 120Hz

FRONT VIEW

1

2

3

4

5

Vsense

Adj

Vout

Vctrl

Vin

4

3

2

1

5

6

7

8

TOP VIEW

Vout

Vsense

Adj

Vin

Vctrl

Vout

Vout

Vout

FRONT VIEW

1

2

3

4

5

Vsense

Adj

Vout

Vctrl

Vin