RC5057 데이터 시트보기 (PDF) - Fairchild Semiconductor

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RC5057

High Performance Programmable Synchronous DC-DC Controller for Low Voltage Microprocessors

Fairchild Semiconductor 

RC5057

Typical Operating Characteristics (continued)

Output Startup from Enable

Time (10ms/division)

2.042

2.040

2.038

2.036

2.034

2.030

2.028

2.026

0

PRODUCT SPECIFICATION

VOUT Temperature Variation

25

70

100

Temperature (°C)

Application Circuit

+12V

+5V

L1 (Optional)

2.5µH

CIN*

R6

10Ω

C1

4.7µF

VID4

VID3

VID2

VID1

VID0

R1

33Ω

9

8

10

7

11

12

U1

6

RC5057 5

13

4

14

3

15

2

16

1

ENABLE/SS

C4

0.1µF

C5

1µF

R2

4.7Ω

C2

1µF

Q1

L2

1.3µH

R3

VO

4.7Ω

Q2

D1

MBRD835L

COUT*

C3

0.1µF

R5*

VCC

R4

10KΩ

PWRGD

C6

0.1µF

*Refer to Appendix for values

of COUT, R5, and CIN.

Figure 1. Typical Application Circuit

(Worst Case Analyzed! See Appendix for Details)

8

REV. 1.2.0 2/10/00

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