3

© 2008 Semtech Corp.

SC471/SC471A

www.semtech.com

POWER MANAGEMENT

Absolute Maximum Rating

Electrical Characteristics

Parameter

Symbol

Min

Max

Units

DH, BST to GND (DC)

DH, BST to GND (transient - 100nsec max)

-0.3

-2.0

+30

+33

V

DL to GND (DC)

DL to GND (transient - 100nsec max)

-0.3

-2.0

+6.0

+6.0

V

LX to GND (DC)

LX to GND (transient - 100nsec max)

-0.3

-2.0

+25

+28

V

BST to LX

-0.3

+6.0

V

RTN to GND

-0.3

+0.3

V

VCC to RTN

-0.3

+6.0

V

D0, D1, EN, FB, G0, G1, ILIM, PGOOD, VOUT to RTN

-0.3

VCC + 0.3

V

Operating Junction Temperature Range

T

J

-40

+125

o

C

Storage Temperature Range

T

STG

-65

+150

o

C

θ

JA

45

o

C/Watt

Peak IR Reflow Temperature, (10-40sec)

T

PKG

+260

o

C

ESD Rating (Human Body Model)

2

kV

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

Electrical Characteristics section is not implied. Exposure to Absolute Maximum rated conditions for extended periods of time may affect device reliability.

Note:

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

Test Conditions: V

o

C, 0.1% resistor dividers; VCC = 5.0V.

Parameter

Conditions

25°C

-40° to 85°C

Units

Min

Typ

Max

Min

Max

Input Supplies

VBAT Input Voltage

3.0

25

V

VCC Input Voltage

4.5

5.5

V

VCC Shutdown Current

EN = 0V

1

5

μA

VCC Operating Current

FB > 0.8V

500

1000

μA

Controller

FB On-Time Threshold

0 to 85°C

0.75

0.7436 0.7564

V

-40 to 85°C

0.7425 0.7575

0.75

5.25

V

D0/D1 Pull-Down Resistance

D0/D1 to RTN;

SC471 G0/G1 = 5V; SC471A G0/G1 = 0V

15

40

Ω