LTC3331_15 Datasheet, PDF (15/34 Pages) Linear Technology – Nanopower Buck-Boost DC/DC with Energy Harvesting Battery Charger

BLOCK DIAGRAM
LTC3331
10 ^VIN
20V
AC1
8
AC2
9
26 ^VIN3
V_REF
BANDGAP
REFERENCE
BB_IN
16
V_IN3
EH_ON
29
CHARGE
27
V_IN2
SLEEP-UVLO
UVLO
UVLO_SET
INTERNAL
RAIL
GENERATION
SLEEP
PRIORITIZER
BUCK
CONTROL
ILIM_SET
BUCK-BOOST
CONTROL
V_REF –
SLEEP
+
CAP
11
SW
12
V_IN2
3
GND
33
SWA
15
SWB
14
V_OUT
13
V_IN2 BB_IN V_OUT
BAT_OUT
20
BODY
DIODE
21
BAT_IN
SHUNT
PMOS
+ VREF
EA
–
–
+ V_REF
+
SLEEP
0.925*V_{REF –}
UVLO_SET
PGVOUT
28
SCAP
2
+
BAL
1
–
ILIM_SET
BB_IN
BB_IN
V_IN3
V_IN2
V_IN3
SHIP
25
2
FLOAT[1:0]
23, 24
LBSEL
22
3
OUT[2:0]
32, 31, 30
4
UV[3:0]
4, 5, 6, 7
3
IPK[2:0]
19, 18, 17
3331 BD
For more information www.linear.com/LTC3331
3331fb
15