LTC3440_15 Datasheet, PDF (7/20 Pages) Linear Technology – Micropower Synchronous Buck-Boost DC/DC Converter

Block Diagram
V_IN
2.5V TO 5.5V
7
+
SW1
3
SW A
SW B
GATE
DRIVERS
AND
ANTICROSS
CONDUCTION
SW2
4
SW D
–0.4A
SW C
I_SENSE
AMP
REVERSE
CURRENT
LIMIT
LTC3440
V_OUT
6
V_OUT
2.5V TO 5.5V
SUPPLY
CURRENT
LIMIT
+
ERROR
AMP
1.22V
2.7A
–
UVLO
+
PWM
LOGIC
AND
OUTPUT
PHASING
PWM
COMPARATORS
R1
FB
9
CLAMP
2.4V
–
R_{T RT 1}
OSC
SYNC
MODE/SYNC 2
1 = Burst Mode
OPERATION
0 = FIXED FREQUENCY
SLEEP
Burst Mode
OPERATION
CONTROL
5µs DELAY
5
GND
SHUTDOWN
V_C
10
R2
SHDN/SS
8
R_SS
V_IN
C_SS
3440 BD
For more information www.linear.com/LTC3440
3440fc
7