TPS5618EVM-106 Datasheet, PDF (1/26 Pages) Texas Instruments – SYNCHRONOUS-BUCK HYSTERETIC REGULATOR CONTROLLER

TPS5615, TPS5618, TPS5625, TPS5633
SYNCHRONOUS-BUCK HYSTERETIC REGULATOR CONTROLLER
SLVS177B – SEPTEMBER 1998 – REVISED JULY 2000
D ±1% Reference Over Full Operating
Temperature Range
D Synchronous Rectifier Driver for >90%
Efficiency
D Fixed Output Voltage Options of 1.5 V,
1.8 V, 2.5 V, and 3.3 V
D User-Selectable Hysteretic-Type Control
D Low Supply Current . . . 3 mA Typ
D 11.4-V to 13-V Input Voltage Range, V_CC
D Power Good Output
D Programmable Soft-Start
D Overvoltage/Overcurrent Protection
D Active Deadtime Control
description
PWP PACKAGE
(TOP VIEW)
IOUT
1
28
AGND2
2
27
OCP
3
26
VHYST
4
25
VREFB
5
24
VSENSE
6
23
ANAGND
7
22
SLOWST
8
21
BIAS
9
20
LODRV
10
19
LOHIB
11
18
DRVGND
12
17
LOWDR
13
16
DRV
14
15
NC – No internal connection
PWRGD
NC
NC
NC
NC
NC
INHIBIT
IOUTLO
LOSENSE
HISENSE
BOOTLO
HIGHDR
BOOT
V_CC
The TPS5615 family of synchronous-buck regulator controllers provides an accurate supply voltage to DSPs.
The output voltage is internally set by a resistive divider with an accuracy of 1% over the full operating
temperature range. A hysteretic controller with user-selectable hysteresis 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. PWRGD monitors the output voltage and pulls the
open-collector output low when the output drops below 93% of 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 that the 12-V supply voltage and system
supply voltage (5 V or 3.3 V) are within proper operating limits before the controller starts. The output driver
circuits include 2-A drivers with internal 8-V gate-voltage regulators that can easily provide sufficient power for
today’s high-powered DSPs. The high-side driver can be configured either as a ground-referenced driver or as
a floating bootstrap driver. The TPS5615 family 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
OUTPUT VOLTAGE
TSSOP†
(PWP)
1.5 V
TPS5615PWP
0°C to 125°C
1.8 V
2.5 V
TPS5618PWP
TPS5625PWP
3.3 V
TPS5633PWP
† _{The PWP package is availble taped and reeled. Add R suffix to}
device type (e.g., TPS5615PWPR).
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.
PowerPAD is a trademark of 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.
Copyright © 2000, Texas Instruments Incorporated
• POST OFFICE BOX 655303 DALLAS, TEXAS 75265
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