ltc3440 Linear Technology Corporation, ltc3440 Datasheet - Page 7

• Manufacturer Part Number: ltc3440
• Description: Micropower Synchronous Buck-boost Dc/dc Converter
• Manufacturer: Linear Technology Corporation

BLOCK DIAGRA
+
2.5V TO 5.5V
1 = Burst Mode
0 = FIXED FREQUENCY
MODE/SYNC
OPERATION
V
R
IN
T
R
T
7
1
2
2.7A
2.4V
SYNC
OSC
+
–
+
–
SW A
W
SW1
CURRENT
SW B
SUPPLY
SLEEP
LIMIT
UVLO
3
CONDUCTION
ANTICROSS
OPERATION
Burst Mode
5μs DELAY
CONTROL
DRIVERS
PHASING
OUTPUT
LOGIC
GATE
PWM
AND
AND
5
GND
COMPARATORS
PWM
4
SW C
SW2
I
SENSE
AMP
–
+
–
+
–0.4A
–
SHUTDOWN
SW D
+
CURRENT
REVERSE
LIMIT
ERROR
AMP
CLAMP
+
–
1.22V
10
6
9
8
SHDN/SS
V
FB
V
OUT
C
R
C
SS
SS
LTC3440
V
IN
2.5V TO 5.5V
R1
R2
V
OUT
3440fb
7
3440 BD