Datasheet

VIN
38
Internal ref
(Band gap)
37
EXTSUP
Gate Driver
Supply
35
VREG
35
RT
22
SYNC
20
4
Internal
Oscillator
SYNC and
LPM
180 deg
Source
and
Sink
Logic
GC2
ENC
18
23
14
SSA
1 µA
VIN
500 nA
ENA
16
ENA
25
SSB
1 µA
ENB
17
VIN
500 nA
ENB
COMPC
1
36
VBAT
DIV
Gm
2
DS
OCP
0.2 V
3
GC1
19
ENC
AGND
PWM
Logic
Duplicate for second
Buck controller channel
VREG
5
CBA
6
GA1
7
PHA
8
GA2
9
PGNDA
Slope
Comp
Current sense
Amp
PWM
comp
OTA
10
SA1
12
FBA
11
SA2
SSA
15
PGA
FBA
Filter timer
SA2
21
DLYAB
40 µA
40 µA
21
DLYAB
34
33
32
31
30
29
28
27
26
24
CBB
GB1
PHB
GB2
PGNDB
SB1
SB2
FBB
COMPB
PGB
Second
Buck
Controller
Channel
13
COMPA
0.8 V
OTA
VIN
V
boostxV
Gm
V
boost7V-th
V
boost10V-th
V
boost11V-th
MUX
VREG
PGNDA
Ramp
PWM
comp
PWM
Logic
TPS43330-Q1
TPS43332-Q1
SLVSA82E –MARCH 2011–REVISED APRIL 2013 www.ti.com
Figure 2. Functional Block Diagram
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