LTC3350_15 Datasheet, PDF (13/46 Pages) Linear Technology – High Current Supercapacitor Backup Controller and System Monitor

Block Diagram
LTC3350
34
V_IN
33
31
INFET
VOUTSP
32
VOUTM5
30
VOUTSN
20
OUTFET
17
18
CFP CFM
+–
+–
30mV
V_REF
D/A
vcapfb_dac[3:0]
6 ^CAPFB
OUTFB
7
VC
5
–5V LDO
– ^VREF ⁺
+^x37.5
–
I_IN
Vcapfb_dac ₊
–
V_REF +
–
RT
9
OSC
INTV_CC
29
INTV_CC
CHARGE
PUMP
30mV
x37.5
I_REF
I_CHG
5V LDO
V_OUTSP
BIDIRECTIONAL
SWITCHING
CONTROLLER
VCC2P5
23
CAPGD
4
INTV_CC
Vcapfb_dac
CAPFB
2.5V LDO
BANDGAP VREF
BALANCER
SHUNT
CONTROLLER
VCAPP5
19
VCAP
21
22
ICAP
BST
26
TGATE
25
SW ₂₄
DRV_CC
28
BGATE
27
CAP4
16
CAP3
15
INTV_CC
V_REF +
PFI
37
–
PFO
38
CAP_SLCT0
35
CAP_SLCT1
36
SMBALERT
3
SDA
2
SCL
1
GPI
10
SGND
8
V_REF
A/D
LOGIC
I_IN
ICHG
VCAP
V_OUT
V_IN
CAP4
CAP3
CAP2
CAP1
CAPRTN
DTEMP
BALANCER
BALANCER
BALANCER
–
+
GPIBUF
SHUNT
CONTROLLER
CAP2
14
SHUNT
CONTROLLER
CAP1
13
SHUNT
CONTROLLER
CAPRTN
12
V_REF
ITST
11
PGND
39
For more information www.linear.com/LTC3350
3350 BD
3350fb
13