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TPS53125TIN/a1398avaiDual Synchronous Step-Down Controller for Low Voltage Power Rails
TPS53125PWTIN/a72avai4.5V-24V input Synchronous DCAP2 Mode Dual Step-Down Controller 24-TSSOP -40 to 85
TPS53125PWBB/TIN/a200avai4.5V-24V input Synchronous DCAP2 Mode Dual Step-Down Controller 24-TSSOP -40 to 85
TPS53125PWRTI/BBN/a2801avai4.5V-24V input Synchronous DCAP2 Mode Dual Step-Down Controller 24-TSSOP -40 to 85


TPS53125PWR ,4.5V-24V input Synchronous DCAP2 Mode Dual Step-Down Controller 24-TSSOP -40 to 85Maximum Ratings(1)over operating free-air temperature range (unless otherwise noted)MIN MAX UNITVIN ..
TPS53126PWR ,4.5V-24V input Synchronous DCAP2 Mode Dual Step-Down Controller 24-TSSOP -40 to 85Electrical Characteristics...... 512.1 Trademarks..... 237.6 Timing Requirements... 612.2 Electrost ..
TPS53126PWR ,4.5V-24V input Synchronous DCAP2 Mode Dual Step-Down Controller 24-TSSOP -40 to 85 SLUS909B–MAY 2009–REVISED AUGUST 20146 Pin Configurations and Functions24 Pin VQFN24 Pin TSSOPRGE ..
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TPS53125-TPS53125PW-TPS53125PWR
Dual Synchronous Step-Down Controller for Low Voltage Power Rails
13 kΩ
13 kΩ10 kΩ
3.52 kΩ
C10
TPS53125PW
DRVH1
VBST1
EN1
VO1
VFB1
GND
SS1
VFB2
VO2
SW1
DRVL1
PGND1
TRIP1
VIN
VREG5
SS2
0.1Fµ
3.3 kΩFµ22Fx4µFµ
FDS8878
SPM 6530T
1.5Hµ
FDS8878
VO1
1.8 V/4A
PGND
Input Voltage
4.5 V to 24 V
TPS53125RGE
(QFN)
SW1
DRVH1
VBST1
EN1
VFB2
VO2 VO
VFB
SW210µF
Input Voltage
PGND
10µF
PGND
3.52kΩ
10kΩ23456
Power PAD
SGND
SS1
4.5V to24V
VO1
1.8V/4A
FDS8878
FDS8690SPM6530T
1.5Hµ0.1µF10kΩ13kΩ22Fx4
C10
4700pFC9
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TPS53125

SLVS947C –OCTOBER 2009–REVISED AUGUST 2014
TPS53125 Dual Synchronous Step-Down Controller for Low Voltage Power Rails Features
D-CAP2™ Mode Control Fast Transient Response No External Parts Requiredfor Loop
Compensation Compatible With Ceramic Output Capacitors High Initial Reference Accuracy (±1%) Low Output Ripple Wide Input Voltage Range: 4.5Vto 24V Output Voltage Range: 0.76Vto 5.5V Low-Side RDS(ON) Loss-Less Current Sensing Adaptive Gate Drivers with Integrated Boost Diode Adjustable Soft Start Non-Sinking Pre-Biased Soft Start 350-kHz Switching Frequency Cycle-by-Cycle Over-Current Limiting Control 30-mVto 300-mV OCP Threshold Voltage Thermally Compensated OCPby 4000 ppm/°Cat
ITRIP Applications Point-of-Load Regulationin Low Power Systems
for Wide Rangeof Applications Digital TV Power Supply Networking Home Terminal Digital Set-Top Box (STB) DVD Player/Recorder Gaming Consoles Description
The TPS53125isa dual, adaptive on-time D-CAP2™
mode synchronous buck controller. The part enables
system designers to cost effectively complete the
suite of various end equipment's power bus
regulators witha low external component count and
low standby consumption. The main control loop for
the TPS53125 uses the D-CAP™ Mode topology
which providesa very fast transient response with no
external component.
The TPS53125 also hasa proprietary circuit that
enables the deviceto adapt not only low equivalent
series resistance (ESR) output capacitors such as
POSCAP/SP-CAP, but also ceramic capacitor. The
part providesa convenient and efficient operation
with conversion voltages from 4.5Vto 24V and
output voltage from 0.76Vto 5.5V.
The TPS53125is availablein 24-pin RGE and PW
packages, and is specified from –40°C to 85°C
ambient temperature range.
Device Information(1)

(1) Forall available packages, see the orderable addendumat
the endofthe datasheet. Simplified Schematics
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