TPS53819A Datasheet, PDF (1/43 Pages) Texas Instruments – High-Performance, Eco-mode, Single Synchronous Step-Down Controller with PMBus

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TPS53819A
SLUSB56 – NOVEMBER 2012
High-Performance, Eco-mode™, Single Synchronous Step-Down Controller with PMBus™
Check for Samples: TPS53819A
FEATURES
1
•23 Conversion Input Voltage Range: 3 V to 28 V
• VDD Input Voltage Range: 4.5 V to 28 V
• Output Voltage Range: 0.6 V to 5.5 V
• Supports All Ceramic Output Capacitors
• Reference Voltage: 600 mV ±0.5% Tolerance
• ±9% Voltage Adjustment via PMBus™
• Built-in 5-V LDO
• D-CAP2™ Mode with 100-ns Load Step
Response
• Auto-Skip Eco-mode™ for Light-Load
Efficiency
• Adaptive On-Time Control Architecture With
Eight Selectable Frequencies via PMBus
• Supports Voltage Margining via PMBus
• Programmable Soft-Start Time via PMBus
• Programmable Power-On Delay via PMBus
• Programmable VDD UVLO Level via PMBus
• Fault Report via PMBus
• Pre-Charged Start-Up Capability
• Built-In Output Discharge
• Power Good Output With Programmable Delay
• Internal Overvoltage, Undervoltage, and
Overcurrent Limit Protections
• Thermal Shutdown (Non-Latch)
• 3 mm × 3 mm 16-pin QFN Package
APPLICATIONS
• Point-of-Load Systems
– Storage Computers
– Server Computers
– Multi-Function Printers
– Embedded Computing
DESCRIPTION
TPS53819A is a small-sized, single buck controller
with adaptive on-time D-CAP2 mode control and
PMBus. The device is suitable for low output voltage
and high current, system power rail, or similar point-
of-load (POL) power supply in digital consumer
products. Small package with minimal pin-count
saves space on the PCB, while the programmability
and fault report via PMBus simplify the power supply
design. The skip-mode at light-load condition
combined with strong gate drivers and low-side FET
R_DS(on) current sensing can support low-loss and high
efficiency operation, over a broad load range. The
conversion input voltage, which is the high-side FET
drain voltage, ranges from 3 V to 28 V. The supply
voltage (VDD) for TPS53819A is from 4.5 V to 28 V.
The output voltage ranges from 0.6 V to 5.5 V. The
TPS53819A is available in a 16-pin, QFN package
and is specified from –40°C to 85°C.
V3P3
VREG
EN
16
15 14 13
ADDR PGOOD EN VBST
1 SCL
SW 12
2 SDA
3 ALERT
TPS53819A
4 TRIP
DRVH 11
DRVL 10
VREG 9
VIN
CSD87350
SW
VIN
SW
TG
SW
TGR
BG
PGND
V_IN
V_OUT
5
6
7
8
VDD
UDG-12118
1
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, D-CAP2 are trademarks of Texas Instruments.
2
PMBus is a trademark of SMIF, Inc.
3
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 © 2012, Texas Instruments Incorporated