IR3638SPBF 查看數據表（PDF） - International Rectifier

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IR3638SPBF

HIGH FREQUENCY SYNCHRONOUS PWM BUCK CONTROLLER FOR TRACKING APPLIACTIONS

International Rectifier 

Block Diagram

IR3638SPbF

Vcc 4

3V

22uA

SS 13

POR

64uA

25K

VP 2

25K

Fb 1

Comp 12

250mV

4.25V

50mV

POR

0.65V

Error Amp

10 Vc

Ramp Oscillator

S

Error Comp

Q

R

Reset Dom

9 HDrv

Vcc

6 LDrv

FbLo Comp

0.4V

POR

2V

SS

Pre-Bias

Comparator

8 PGnd

7 Gnd

Fig. 2: Simplified block diagram of the IR3638

3/19/07

3

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