2

© 2006 Semtech Corp.

www.semtech.com

SC251

POWER MANAGEMENT

Exceeding the specifications below may result in permanent damage to the device or device malfunction. Operation outside of the parameters specifed in the

Electrical Characteristics section is not recommended.

Parameter

Symbol

Maximum

Units

Input Supply Voltage

V

IN

-0.3 to 7

V

Logic Inputs/Outputs

(EN, VMODE, VDAC, GD)

V

N

-0.3 to V

V

Output Voltage

V

OUT

-0.3 to V

V

LX Voltage

V

LX

-1 to V

V

θ

JA

49

°C/W

VOUT Short-Circuit to GND

t

SC

Continuous

s

Operating Ambient Temperature Range

T

A

-40 to +85

°C

Storage Temperature

T

S

-60 to +160

°C

Maximum Junction Temperature

T

J

-40 to +150

°C

Peak IR Reflow Temperature

T

LEAD

260

°C

V

ESD

2kV

Notes:

Calculated from package in still air, mounted to 3” x 4.5”, 4 layer FR4 PCB with thermal vias under exposed pad pre JESD51 standards.

Tested according JEDEC standard JESD22-A114-B

1.

2.

Unless otherwise noted: V

Parameter

Symbol

Conditions

Min

Typ

Max

Units

Input Voltage Range

V

IN

2.7

5

V

V

V

OUT

V

0.44

0.48

0.52

V

V

3.16

3.40

3.64

I

1.38

1.62

1.86

Line Regulation

V

OUT LINE

V

I

±1.2

%

Load Regulation (PWM)

V

OUT LOAD

I

±0.5

%

Peak Inductor Current

I

LX PK

1

1.7

A

Bypass FET current limit

I

PASS

1

2.5

A

Quiescent Current

I

Q NORM

2.5

mA

I

Q PASS

V

1.5

Absolute Maximum Ratings

Electrical Characteristics