TPS53313 Datasheet, PDF (1/23 Pages) Texas Instruments – 6-A Step-Down Regulator with Integrated Switcher

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6-A Step-Down Regulator with Integrated Switcher
Check for Samples: TPS53313
TPS53313
SLUSAS8 – DECEMBER 2011
FEATURES
1
•2 4.5-V to 16-V Conversion Voltage Range
• Adjustable Output Voltage Ranging from 0.6 V
to 0.7×V_IN
• Continuous 6-A Output Current
• Supports All MLCC Output Capacitors
• Selectable SKIP Mode or Forced CCM
• Selectable Soft-Start Time (1 ms, 3 ms, or 6
ms)
• Selectable 4-5 A, 6-A or 9-A Peak Current Limit
• Optimized Efficiency at Light and Heavy Loads
• Voltage Mode Control
• Programmable Switching Frequency from
250 kHz to 1.5 MHz
• Synchronizes to External Clock
• R_DS(on) Sensing for Zero Crossing Detection
and Overcurrent Protection
• Soft-Stop Output Discharge During Disable
• Overcurrent, Overvoltage and Undervoltage
Protection with Hiccup
• Over-Temperature Protection
• Open-Drain, Power Good Indication
• Internal Bootstrap Switch
• 4 mm × 4 mm, 24-Pin, QFN Package
LOW VOLTAGE APPLICATIONS
• POL Applications for 5-V or 12-V Step-Down
Rail
DESCRIPTION
TPS53313 provides a 5-V or 12-V synchronous buck
converter that integrates two N-Channel MOSFETs.
Due to low R_DS(on) and TI proprietary SmoothPWM™
skip mode of operation, it optimizes the efficiency at
light-load condition without compromising the output
voltage ripple.
The TPS53313 features programmable (from 250
kHz to 1.5MHz) switching frequency with selectable
skip mode or forced CCM mode operation. The
device provides pre-biased startup, soft-stop,
integrated bootstrap switch, power good function,
EN/input UVLO protection. It supports input voltages
from 4.5 V to 16 V and no extra bias voltage is
needed. The output voltage is adjustable from 0.6 V
up to 0.7 × V_IN.
The TPS53313 is available in a 4 mm × 4 mm,
24-pin, QFN package (Green RoHs compliant and Pb
free) and operates between -40°C and 85°C.
TYPICAL APPLICATION CIRCUIT
V_IN
Output All MLCCs
V_OUT
VIN
BP7
BP3
SW
VBST
C_BST
V_IN
AGND ^TPS53313
PG
EN
EN
RT/SYNC
FB
MODE/SS
PowerPad
PGND
COMP
PGOOD
UDG-11254
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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.
SmoothPWM is a trademark 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