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TPS51124 Datasheet(PDF) 6 Page - Texas Instruments

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Part No. TPS51124
Description  DUAL SYNCHRONOUS STEP-DOWN CONTROLLER FOR LOW VOLTAGE POWER RAILS
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Maker  TI [Texas Instruments]
Homepage  http://www.ti.com
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TPS51124 Datasheet(HTML) 6 Page - Texas Instruments

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FUNCTIONAL BLOCK DIAGRAM
−30%
UV
OV
+15%
Ref
758 mV
SSx
VFBx
TRIPx
10
µA
GND
LLx
PGNDx
LLx
VOx
LLx
PGNDx
LLx
ONx
ZC
OCP
PWM
+5/10%
−5/10%
Control Logic
1
Shot
On/Off T ime
Minimum On/Off
Light Load,
OVP/UVP,
Discharge
Control
PGNDx
Delay
XCON
T ONSEL
Sdn
Fault
DR VLx
V5IN
V5IN
LLx
DR VHx
VBSTx
THOK
V5OK
PGNDx
PGOODx
V5IN
4 V/3.7 V
V5OK
THOK
BGR
V5FIL T
VO1
VBST1
DR VH1
LL1
DR VL1
PGND1
Switcher Controller
V5DRV
Ref
Fault
Sdn
ANALOG/SUB GND
EN/SS
Control
Sdn
Fault
Ref
V5DRV
Switcher Controller
VO2
VBST2
DR VH2
LL2
LL2
DR VL2
PGND2
1 V
T ONSEL
4 V
Frequency Control
FAST
SLOW
160 °C/
150 °C
MID
TPS51124
SLVS616A – NOVEMBER 2005 – REVISED NOVEMBER 2005
6


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