4-2

Rev. 1.0

5/6/98

US3012/3012A

ELECTRICAL SPECIFICATIONS

ELECTRICAL SPECIFICATIONS

Unless otherwise specified ,these specifications apply over ,V12 = 12V, V5 = 5V and Ta=0 to 70

°C. Typical values

refer to Ta =25

°C. Low duty cycle pulse testing are used which keeps junction and case temperatures equal to the

ambient temperature.

ABSOLUTE MAXIMUM RATINGS

ABSOLUTE MAXIMUM RATINGS

V5 supply Voltage

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

V12 Supply Voltage ............................................ 20V

Storage Temperature Range ................................. -65 TO 150

Operating Junction Temperature Range .......... 0 TO 125

PACKAGE INFORMATION

PACKAGE INFORMATION

20 PIN WIDE BODY PLASTIC SOIC (W)

PARAMETER

SYM

TEST CONDITION

MIN

TYP

MAX

UNITS

VID Section

DAC output voltage

0.99Vs

Vs

1.01Vs

V

(note 1)

DAC Output Line Regulation

0.1

%

DAC Output Temp Variation

0.5

%

VID Input LO

0.4

V

VID Input HI

2

V

VID input internal pull-up

27

k

Ω

resistor to V5

Power Good Section

Under voltage lower trip point

Vout ramping down

0.89Vs

0.90Vs

0.91Vs

V

Under voltage upper trip point

Vout ramping up

0.92Vs

V

UV Hysterises

.015Vs

.02Vs

.025Vs

V

Over voltage upper trip point

Vout ramping up

1.09Vs

1.10Vs

1.11Vs

V

Over voltage lower trip point

Vout ramping down

1.08Vs

V

OV Hysterises

.015Vs

.02Vs

.025Vs

V

Power Good Output LO

RL=3mA

0.4

V

Power Good Output HI

RL=5K pull up to 5V

4.8

V

Soft Start Section

Soft Start Current

CS+ =0V , CS- =5V

10

uA

4

3

2

1

7

6

5

18

19

20

TOP VIEW

11

13

12

14

10

15

9

16

8

17

SS

D0

D1

D2

D3

Gnd

Vfb

V12

HDrv

NC

Ct

En

PGd

CS+

CS-

V5

NC

D4

LDrv

PGnd