TPS53316 Datasheet, PDF (1/29 Pages) Texas Instruments – High-Efficiency, 5-A Step-Down Regulator with Integrated Switcher

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TPS53316
SLUSAP5 – DECEMBER 2011
High-Efficiency, 5-A Step-Down Regulator with Integrated Switcher
Check for Samples: TPS53316
FEATURES
1
•2 96% Maximum Efficiency
• Continuous 5-A Output Current Capability
• Support all MLCC Output Capacitor
• SmoothPWM™ Auto-Skip Eco-mode™ for
Light-Load Efficiency
• Voltage Mode Control
• Single Rail Input
• Selectable Frequency
• Selectable OCP Threshold
• Selectable Soft-Start Time
• 2.9 V to 6.0 V Input Voltage Range
• Adjustable Output Voltage Ranging from 0.6 V
up to 0.8 × V_IN
• Soft-Stop Output Discharge During Disable
• Overcurrent, Overvoltage and
Over-Temperature Protection
• Open-Drain Power Good Indication
• Internal Bootstrap Switch
• Supports Pre-Bias Start-Up Functionality
• Small 3 × 3, 16-Pin, QFN Package
• Low R_DS(on), 22-mΩ with 3.3-V input and 18-mΩ
with 5-V Input
LOW VOLTAGE APPLICATIONS
• Low-Voltage Applications for 5-V Step-Down
Rail
• Low-Voltage Applications for 3.3-V Step-Down
Rail
DESCRIPTION
TPS53316 provides a fully integrated 3.3-V or 5-V
input, synchronous buck converter with 16 total
components, in 200 mm² of PCB area. Due to low
R_DS(on) and TI proprietary SmoothPWM™ skip mode
of operation, it enables 96% peak efficiency and over
90% efficiency at load as light as 100 mA. It requires
only two 22-µF ceramic output capacitors for a
power-dense, 5-A solution.
TPS53316 features 750-kHz, 1.1-MHz and 2-MHz
switching frequency selections, pre-bias startup,
selectable internal softstart, output soft discharge,
Internal VBST switch, power good, EN/Input UVLO,
overcurrent, overvoltage, undervoltage and over
temperature protections and all ceramic output
capacitor support. It supports input voltages from 2.9
V to 6.0 V and no extra bias voltage is needed. The
output voltage is adjustable from 0.6 V up to 0.8 ×
V_IN.
TPS53316 is available in the 3 mm × 3 mm ,16-pin,
QFN package (Green RoHs compliant and Pb free)
and is specified from –40°C to 85°C.
TYPICAL APPLICATION CIRCUIT
2.9 V to 6 V
Output All MLCCs
VIN
VREG3
SW
VBST
C_BST
V_IN
AGND
TPS53316
EN
EN
PGD
PGD
RF/OC
FB
PS _PowerPad
COMP
UDG-11233
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Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas
Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
Eco-mode, SmoothPWM are trademarks of Texas Instruments.
2
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Copyright © 2011, Texas Instruments Incorporated