TPS5211 Datasheet, PDF (1/32 Pages) Texas Instruments – HIGH FREQUENCY PROGRAMMABLE HYSTERETIC REGULATOR CONTROLLER

TPS5211
HIGH FREQUENCY PROGRAMMABLE HYSTERETIC
REGULATOR CONTROLLER
SLVS243 – SEPTEMBER 1999
D 700 KHz Operation
D 1.25 MHz Operation With External Driver
D 1.5% Reference Over Full Operating
Temperature Range
D Synchronous Rectifier Driver for Greater
Than 90% Efficiency
D Programmable Reference Voltage Range of
1.3 V to 3.5 V
D User–Selectable Hysteretic Type Control
D Droop Compensation for Improved Load
Transient Regulation
D Adjustable Overcurrent Protection
D Programmable Softstart
D Overvoltage Protection
D Active Deadtime Control
D Power Good Output
D Internal Bootstrap Schottky Diode
D Low Supply Current . . . 3-mA Typ
D Reduced System Component Count and
Size
IOUT
DROOP
OCP
VHYST
VREFB
VSENSE
ANAGND
SLOWST
BIAS
LODRV
LOHIB
DRVGND
LOWDR
DRV
PWP PACKAGE
(TOP VIEW)
1
28
2
27
3
26
4
25
5
24
6
23
7
22
8
21
9
20
10
19
11
18
12
17
13
16
14
15
PWRGD
VID0
VID1
VID2
VID3
VID4
INHIBIT
IOUTLO
LOSENSE
HISENSE
BOOTLO
HIGHDR
BOOT
V_CC
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
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.
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.
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Copyright © 1999, Texas Instruments Incorporated
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