US1176

2-2

Rev. 1.1

9/24/99

ABSOLUTE MAXIMUM RATINGS

ABSOLUTE MAXIMUM RATINGS

Input Voltage (Vin)

........................................................... 7V

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

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

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

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

PACKAGE INFORMATION

PACKAGE INFORMATION

7 PIN PLASTIC TO263 ( M )

7 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

°C.Typical

values refer to Tj=25

°C. Vout=Vsense.

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

mV

Load Regulation (note 1)

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

to 7.5A,Vadj=0V

5

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=4A

1.05

Vin=2.05V,Io=7.5A

1.15

Dropout Voltage (note 2)

Vadj=0V for all conditions below.

(Vin - Vout)

Vctrl=2.75V,Io=1.5A

0.075

V

Vctrl=2.75V,Io=3A

0.150

Vctrl=2.75V,Io=4A

0.200

Vctrl=2.75V,Io=7.5A

0.375

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=4A,Vadj=0V

60

70

dB

Tj=25,Vripple=1Vpp at 120Hz

S.D Threshold Voltage

Vctrl - 1.4 Vctrl - 2.2

V

S.D Input Current

Vctrl=5V, S.D=0V

94

130

uA

FRONT VIEW

1

2

3

4

5

6

7

Vsense

SD

Vout

Vin

Vin

Adj

Vctrl

Vsense

SD

Vout

Vin

Vin

FRONT VIEW

1

2

3

4

5

6

7

Adj

Vctrl