TPS5211

HIGH FREQUENCY PROGRAMMABLE HYSTERETIC

REGULATOR CONTROLLER

SLVS243 – SEPTEMBER 1999

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POST OFFICE BOX 655303

Temperature Range

Than 90% Efficiency

1.3 V to 3.5 V

Transient Regulation

Size

description

The TPS5211 is a hysteretic 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 equal the reference voltage or 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) is

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 TPS5211 is available in a 28-pin TSSOP PowerPAD

™ package. It operates over

a junction temperature range of 0

°C to 125°C.

AVAILABLE OPTIONS

PACKAGE

TJ

TSSOP

(PWP)

0

°C to 125°C

TPS5211PWPR

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

PWP PACKAGE

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