SC4501 View Datasheet(PDF) - Semtech Corporation

Part Name

Description

MFG CO.

SC4501

2Amp, 2MHz Step-Up Switching Regulator with Soft-Start

Semtech Corporation 

POWER MANAGEMENT

Typical Application Circuits

SC4501

4-CELL

3.6 - 6V

L1

C6

D1

4.9µH

2.2µF

10BQ015

6

5

C1

2.2µF

OFF ON 3

8

IN

SHDN

SW

FB 2

SC4501

SS

COMP 1

C3

47nF

GND

4

ROSC

7

R4

7.68K

L2

R3

4.9µH

20K

C4

560pF

C5 R1

47pF 60.4K

R2

20K

VOUT

5V

C2

10µF

L1 and L2: Coiltronics CTX5-1

Figure 12(a). 1.5 MHz All Ceramic Capacitor 4-Cell to 5V SEPIC Converter. Pinout Shown is for MSOP-8.

VIN=3.6V

VIN=6V

40µs/div

Upper Trace : Output Voltage, AC Coupled, 0.2V/div

Lower Trace : Input Inductor Current, 0.2A/div

Figure 12(b). Load Transient Response of the Circuit in Figure

12(a). ILOAD is switched between 50mA and 350mA

at 1A/µs.

40µs/div

Upper Trace : Output Voltage, AC Coupled, 0.2V/div

Lower Trace : Input Inductor Current, 0.2A/div

Figure 12(c). Load Transient Response of the Circuit in Figure

12(a). ILOAD is switched between 80mA and 600mA

at 1A/µs.

© 2005 Semtech Corp.

17

www.semtech.com

Share Link: