ACT4070YH datasheet(7/10 Pages) ACTIVE-SEMI

Part #	ACT4070YH

Description	Wide Input 3A Step Down Converter

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Manufacturer	ACTIVE-SEMI [Active-Semi, Inc]

Direct Link	http://www.active-semi.com

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ACT4070

Figure 3:

ACT4070 2.5V/3A Output Application

: D1 is a 40V, 3A Schottky diode with low forward voltage, an IR 30BQ040 or SK34 equivalent. C4 can be either a ceramic capacitor

(Panasonic ECJ-3YB1C226M) or SP-CAP (Specialty Polymer) Aluminum Electrolytic Capacitor such as Panasonic EEFCD0J470XR.

The SP-Cap is based on aluminum electrolytic capacitor technology, but uses a solid polymer electrolyte and has very stable capaci-

tance characteristics in both operating temperature and frequency compared to ceramic, polymer, and low ESR tantalum capacitors.

IC1

ACT4070

BS

IN

EN

COMP

FB

SW

G

VIN

ENABLE

4.5V to 30V

+

C1

10µF/35V

C2

(CCOMP)

3.3nF

R3

(RCOMP)

5.6k

C5

(CCOMP2)

220pF

R2

13k

D1

40V

3A

L1 10µH/4A

C3

10nF

R1 14k

VOUT

C4 (COUT)

22µF/10V

ceramic or

47µH/6.3 SP

Cap

2.5V/3A

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