SC1157

PROGRAMMABLE SYNCHRONOUS DC/DC

CONTROLLER FOR ADVANCED PROCESSORS

© 2000 SEMTECH CORP.

652 MITCHELL ROAD NEWBURY PARK CA 91320

Preliminary - August 7, 2000

2

NOTE:

(1) Specification refers to application circuit (Figure 1.).

(2) This device is ESD sensitive. Use of standard ESD handling precautions is required.

ELECTRICAL CHARACTERISTICS

Unless specified: V

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

Output Voltage

See Table 1.

Supply Voltage

V

CC

4.5

7

V

Supply Current

V

8

15

mA

Load Regulation

I

(1)

1%

Line Regulation

All VID codes

(1)

+0.15

%

Gain (A

35

dB

Current Limit Voltage

60

70

80

mV

Oscillator Frequency

125

140

155

kHz

Buffered Reference Voltage

I

=1mA

1.25

V

Oscillator Max Duty Cycle

90

95

%

DH Sink/Source Current

BST

1

A

DL Sink/Source Current

BST

1

A

Dead Time

50

100

ns

VID Pin Source current

VIDx < 2.4V

30

100

uA

ABSOLUTE MAXIMUM RATINGS

Parameter

Symbol

Maximum

Units

V

V

IN

-0.3 to 7

V

PGND to GND

± 1

V

BST to GND

-0.3 to 15

V

Thermal Resistance Junction to Case

θ

JC

30

°C/W

Thermal Resistance Junction to Ambient

θ

JA

130

°C/W

Operating Temperature Range

T

A

0 to 70

°C

Storage Temperature Range

T

STG

-65 to +150

°C

Lead Temperature (Soldering) 10 sec

T

LEAD

300

°C

ESD Rating (Human Body Model)

ESD

1.5

kV