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TPS53311RGTTTIN/a501avai2.9V to 6V Input, 3A Synchronous Step-Down Converter with Eco-Mode and Smooth PWM 16-QFN -40 to 85


TPS53311RGTT ,2.9V to 6V Input, 3A Synchronous Step-Down Converter with Eco-Mode and Smooth PWM 16-QFN -40 to 85 SLUSA41B–JUNE 2010–REVISED SEPTEMBER 20165 Pin Configuration and FunctionsRGT Package16-Pin VQFNTo ..
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TPS53311RGTT
2.9V to 6V Input, 3A Synchronous Step-Down Converter with Eco-Mode and Smooth PWM
TPS53311
VIN
VIN 75 SW SW
VIN
2.9Vto6V
VINVDD
2.9Vto3.5V
OutputAll MLCCs
PGD
CBST
PGD
COMP
VDD
AGND
SYNC
PGND
PGND
VBST
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TPS53311

SLUSA41B–JUNE 2010–REVISED SEPTEMBER 2016
TPS53311 3-A Step-Down Regulator With Integrated Switcher Features
95.5% Maximum Efficiency Continuous 3-A Output Current SupportsAll MLCC Output Capacitor SmoothPWM™ Auto-Skip Eco-mode™ for Light-
Load Efficiency Voltage Mode Control Supports Master-Slave Interleaved Operation Synchronizationupto ±20%of Nominal
Frequency Conversion Voltage Range From 2.9Vto6V Soft-Stop Output Discharge During Disable Adjustable Output Voltage Ranging From
0.6Vto 0.84V× VIN Overcurrent, Overvoltage, and Overtemperature
Protection Small,3 mm×3 mm, 16-Pin VQFN Package Open-Drain Power Good Indication Internal Boot Strap Switch Low RDS(on),24 mΩ With 3.3-V Input and 19-mΩ
With 5-V Input Supports Prebias Start-Up Functionality Applications 5-V Step-Down Rail 3.3-V Step-Down Rail Description
The TPS53311 providesa fully integrated 3-Vto 5-V
VIN integrated synchronous FET converter solution
with 16 total components,in 200 mm2of PCB area.
Due to the low RDS(on) and TI Proprietary
SmoothPWM™ skip modeof operation,it enables
95.5% peak efficiency, and over 90% efficiencyat
loads as light as 100 mA.It requires only two 22-µF
ceramic output capacitors fora power-dense, 3-A
solution.
The TPS53311 features a 1.1-MHz switching
frequency, SKIP mode operation support, prebias
start-up, internal soft start, output soft discharge,
internal VBST switch, power good, EN/input UVLO,
overcurrent, overvoltage, undervoltage, and
overtemperature protections and all ceramic output
capacitor support.It supports supply voltage from
2.9Vto 3.5V and conversion voltage from 2.9VtoV, and output voltageis adjustable from 0.6Vto
0.84V× VIN.
The TPS53311is availablein the3 mm×3 mm
16-pin VQFN package (Green RoHs compliant and free) and operates between –40°C and 85°C.
Device Information(1)

(1) Forall available packages, see the orderable addendumat
the endofthe data sheet.
Typical Application Circuit
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