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TPS62403 Datasheet(PDF) 6 Page - Texas Instruments

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Part No. TPS62403
Description  2.25MHz 400mA/600mA Dual Step-Down Converter In Small 3x3mm QFN Package
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Maker  TI [Texas Instruments]
Homepage  http://www.ti.com
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TPS62403 Datasheet(HTML) 6 Page - Texas Instruments

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FUNCTIONAL BLOCK DIAGRAM
Internal
compensated
Error Amp.
Sawtooth
Generator
Skip Comp.Low
PWM
Comp.
Average
CurrentDetector
Skip ModeEntry
VREF
Control
Stage
GateDriver
PMOSCurrent
LimitComparator
NMOSCurrent
LimitComparator
LoadComparator
VREF-1%
FB
VOUT1
FB_VOUT
Undervoltage
Lockout
Thermal
Shutdown
Softstart
VIN
GND
MODE
Error Amp.
Sawtooth
Generator
PWM
Comp.
VREF
Control
Stage
GateDriver
PMOSCurrent
LimitComparator
NMOSCurrent
LimitComparator
LoadComparator
FB_VOUT2
Thermal
Shutdown
Softstart
VIN
GND
MODE
CLK180°
Easy Scale
Interface
CLK0°
CLK180°
2.25MHz
Oscillator
Converter1
Converter2
SW1
SW2
ADJ2
FB1
DEF1
Mode/
DATA
EN1
EN2
VIN
GND
Ext. res. network
Reference
Average
CurrentDetector
Skip ModeEntry
ACK
MOSFET
Opendrain
Internal
compensated
Skip Comp.
VREF+1%
FB_VOUT
Skip Comp.Low
VREF-1%
FB_VOUT
Skip Comp.
VREF+1%
FB_VOUT
Note1
RI1
RI..N
Int.Resistor
Network
C
ff
25pF
Register
DEF1_High
DEF1_Low
RI1
RI..N
Int.Resistor
Network
C
ff 25pF
Register
DEF2
Note2
TPS62400
,, TPS62401
TPS62403
SLVS681C – JUNE 2006 – REVISED DECEMBER 2006
(1)
In fixed output voltage version, the PIN DEF_1 is connected to an internal digital input and disconnected from the
error amplifier
(2)
To set the output voltage of Converter 2 via EasyScale™ Interface, ADJ2 pin must be directly connected to VOUT2
6
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