Datasheet

1.6-MHz
Oscillator
D
S
VFB
1.146 V
Comparator
VFB
1.146 V
D
S
D
S
Vref
1.213 V
Vin
~1 V
D
S
SUP
SUP
D
S
D
S
SUP
C1−
C1+
Vo3
C2+
C2−
D
S
Vref
1.214 V
Soft Start
Vref
1.213 V
SUP
ENR BASE
FB4
REF
FB2
DRV
COMP
FB1
VIN
SW SW
FB3
PG
GND GND PGND PGND
Q1
Q3
Q4
Q5
Q6
Q7
D
S
D
S
Q8
Q9
Q10
SUP
EN
Linear
Regulator
Controller
Reference
Output
Negative
Charge Pump
Positive
Charge Pump
Main boost
converter
Vref
0 V
Current
Control
D1
D4
D2
D3
FB1
FB2
FB3
D
S
Q2
SUP
Vref
1.213 V
FB1
FB2
FB3
System Power
Good
Bias V
ref
= 1.213 V
Thermal Shutdown
Start−Up Sequencing
Undervoltage Detection
Overvoltage Detection
Short Circuit Protection
Current Limit
and
Soft Start
Control Logic
Gate Drive Circuit
Gain Select
(Doubler or
Tripler Mode)
Current
Control
Soft Start
Logic and
1-µs Glitch
Filter
D
S
Short Circuit
Detect
Soft Start
Iref = 20 mA
GM Amplifier
Low Gain
SUP
(V
O
)
Sawtooth
Generator
TPS65140, TPS65141
TPS65145
www.ti.com SLVS497E –SEPTEMBER 2003–REVISED NOVEMBER 2012
FUNCTIONAL BLOCK DIAGRAM
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