LTC3789_15 Datasheet, PDF (11/30 Pages) Linear Technology – High Efficiency, Synchronous, 4-Switch Buck-Boost Controller

Block Diagram
CHARGE
PUMP
BOOST1
CHARGE
PUMP
BOOST2
V_FLD
1.2µA
RUN
SHDN
MODE/
PLLIN
F_IN
PHASE DET
220k
FREQ
10µA
OSCILLATOR
V_IN
V_IN
4.8V +
EXTV_CC
–
+^5.5V
INTV_CC
SGND
LTC3789
I_DREV
V_IN
+
SW1
–
I_REV
+
–
I_CMP
+
–
SLOPE
INTV_CC V_IN
BOOST1
FCB
TG1
BUCK
LOGIC
SW1
INTV_CC
BG1
PGND
BG2
FCB
BOOST
LOGIC
INTV_{CC SW2}
TG2
BOOST2
OV
I_OS
EA
3µA
I_OSENSE+
I_OSENSE–
I_LIM
INTV_CC
V_FB
0.80V _SS
R_SENSE
R_SENSE2
+
V_OUT
EXTV_CC
5.5V
5.5V
LDO
LDO
REG
REG
–
0.86V
+
V_FB
–
INTERNAL
SUPPLY
+
0.74V
I_TH
SENSE⁺
SENSE^–
OV
PGOOD
3789 BD
For more information www.linear.com/LTC3789
3789fc
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