TPS5210

PROGRAMMABLE SYNCHRONOUS-BUCK REGULATOR CONTROLLER

SLVS171A – SEPTEMBER 1998 – REVISED MAY 1999

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POST OFFICE BOX 655303

Temperature Range

Than 90% Efficiency

1.3 V to 3.5 V

Transient Regulation

description

The TPS5210 is a synchronous-buck regulator controller which provides an accurate, programmable supply

voltage to microprocessors. An internal 5-bit DAC is used to program the reference voltage to within a range

of 1.3 V to 3.5 V. The output voltage can be set to be equal to the reference voltage or to some multiple of the

reference voltage. A hysteretic controller with user-selectable hysteresis and programmable droop

compensation is used to dramatically reduce overshoot and undershoot caused by load transients. Propagation

delay from the comparator inputs to the output drivers is less than 250 ns. Overcurrent shutdown and crossover

protection for the output drivers combine to eliminate destructive faults in the output FETs. The softstart current

source is proportional to the reference voltage, thereby eliminating variation of the softstart timing when

changes are made to the output voltage. PWRGD monitors the output voltage and pulls the open-collector

output low when the output drops 7% below the nominal output voltage. An overvoltage circuit disables the

output drivers if the output voltage rises 15% above the nominal value. The inhibit pin can be used to control

power sequencing. Inhibit and undervoltage lockout assures the 12-V supply voltage and system supply voltage

(5 V or 3.3 V) are within proper operating limits before the controller starts. Single-supply (12 V) operation is

easily accomplished using a low-current divider for the required 5-V signals. The output driver circuits include

2-A drivers with internal 8-V gate-voltage regulators. The high-side driver can be configured either as a

ground-referenced driver or as a floating bootstrap driver. The TPS5210 is available in a 28-pin SOIC package

and a 28-pin TSSOP PowerPAD

™ package. It operates over a junction temperature range of 0°C to 125°C.

AVAILABLE OPTIONS

PACKAGES

TJ

SOIC

(DW)

TSSOP

(PWP)

0

°C to 125°C

TPS5210DW

TPS5210PWPR

The DW package is available taped and reeled. Add R suffix to device

type (e.g., TPS5210DWR).

Copyright

© 1999, Texas Instruments Incorporated

PRODUCTION DATA information is current as of publication date.

Products conform to specifications per the terms of Texas Instruments

standard warranty. Production processing does not necessarily include

testing of all parameters.

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.

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IOUT

DROOP

OCP

VHYST

VREFB

VSENSE

ANAGND

SLOWST

BIAS

LODRV

LOHIB

DRVGND

LOWDR

DRV

PWRGD

VID0

VID1

VID2

VID3

VID4

INHIBIT

IOUTLO

LOSENSE

HISENSE

BOOTLO

HIGHDR

BOOT

DW OR PWP PACKAGE

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