TPS2834, TPS2835
SYNCHRONOUS-BUCK MOSFET DRIVERS
WITH DEAD-TIME CONTROL
SLVS223A – NOVEMBER 1999 – REVISED JANUARY 2001
D PACKAGE
(TOP VIEW)
Floating Bootstrap or Ground-Reference
High-Side Driver
Adaptive Dead-Time Control
1
2
3
4
5
6
7
14
13
12
11
10
9
ENABLE
IN
CROWBAR
NC
BOOT
NC
HIGHDR
BOOTLO
LOWDR
NC
50-ns Max Rise/Fall Times With 3.3-nF Load
2.4-A Typical Output Current
4.5-V to 15-V Supply Voltage Range
TTL-Compatible Inputs
SYNC
DT
PGND
8
V
Internal Schottky Bootstrap Diode
CC
SYNC Control for Synchronous or
Nonsynchronous Operation
PWP PACKAGE
(TOP VIEW)
CROWBAR for OVP, Protects Against
Faulted High-Side Power FETs
1
2
3
4
5
6
7
14
13
12
11
10
9
ENABLE
IN
CROWBAR
NC
BOOT
NC
HIGHDR
BOOTLO
LOWDR
NC
Low Supply Current....3 mA Typical
Ideal for High-Current Single or Multiphase
Power Supplies
Thermal
Pad
SYNC
DT
PGND
–40°C to 125°C Operating Virtual Junction
Temperature Range
8
V
CC
Available in SOIC and TSSOP PowerPAD
Packages
NC – No internal connection
description
The TPS2834 and TPS2835 are MOSFET drivers for synchronous-buck power stages. These devices are ideal
for designing a high-performance power supply using switching controllers that do not include on-chipMOSFET
drivers. The drivers are designed to deliver minimum 2-A peak currents into large capacitive loads. The
high-side driver can be configured as ground-reference or as floating-bootstrap. An adaptive dead-time control
circuit eliminates shoot-through currents through the main power FETs during switching transitions, and
provides high efficiency for the buck regulator. The TPS2834 and TPS2835 have additional control functions:
ENABLE, SYNC, and CROWBAR. Both high-side and low-side drivers are off when ENABLE is low. The driver
isconfiguredasanonsynchronous-buckdriverdisablingthelow-sidedriverwhenSYNCislow. TheCROWBAR
function turns on the low-side power FET, overriding the IN signal, for overvoltage protection against faulted
high-side power FETs.
The TPS2834 has a noninverting input, while the TPS2835 has an inverting input. These drivers are available
in 14-terminal SOIC and thermally enhanced TSSOP PowerPAD
packages and operate over a junction
temperature range of –40°C to 125°C.
Related Synchronous MOSFET Drivers
DEVICE NAME
TPS2830
TPS2831
TPS2832
TPS2833
TPS2836
TPS2837
ADDITIONAL FEATURES
INPUTS
Noninverted
ENABLE, SYNC, and CROWBAR
CMOS
CMOS
TTL
Inverted
Noninverted
Inverted
W/O ENABLE, SYNC, and CROWBAR
W/O ENABLE, SYNC, and CROWBAR
Noninverted
Inverted
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.
Copyright 2001, 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.
1
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265