LTC3443 データシートの表示（PDF） - Linear Technology

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LTC3443

High Current Micropower 600kHz Synchronous Buck-Boost DC/DC Converter

Linear Technology 

LTC3443

U

OPERATIO

PVIN

9

PMOS A

SW1

4

NMOS B

VOUT

8

VOUT

PMOS D

SW2

5

NMOS C

3443 F01

Figure 1. Simplified Diagram of Output Switches

75%

DMAX

BOOST

DMIN

BOOST

DMAX

BUCK

A ON, B OFF

PWM CD SWITCHES

BOOST REGION

FOUR SWITCH PWM

BUCK/BOOST REGION

D ON, C OFF

PWM AB SWITCHES

BUCK REGION

0%

DUTY

CYCLE

3443 F02

Figure 2. Switch Control vs Internal Control Voltage, VCI

3443fa

8

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