LTC3443 Datasheet, PDF (8/16 Pages) Linear Technology – High Current Micropower 600kHz Synchronous Buck-Boost DC/DC Converter

LTC3443
U
OPERATIO
PV_IN
9
PMOS A
SW1
4
NMOS B
V_OUT
8
V_OUT
PMOS D
SW2
5
NMOS C
3443 F01
Figure 1. Simplified Diagram of Output Switches
75%
D_MAX
BOOST
D_MIN
BOOST
D_MAX
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, V_CI
8
sn3443 3443fs