TPS2834, TPS2835
SYNCHRONOUS-BUCK MOSFET DRIVERS
WITH DEADTIME CONTROL
SLVS223 – NOVEMBER 1999
D OR PWP PACKAGE
(TOP VIEW)
Floating Bootstrap or Ground-Reference
High-Side Driver
Active Deadtime 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-A Min Peak 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
NC – No internal connection
CROWBAR for OVP, Protects Against
Faulted High-Side Power FETs
Low Supply Current . . . 3 mA Typ
Ideal for High-Current Single- or Multiphase
Applications
–40°C to 125°C Junction-Temperature
Operating Range
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 a switching controller that does not include suitable
on-chip MOSFET 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 low-side driver is configured as a nonsynchronous-buck driver when SYNC is low. The CROWBAR
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 TSSOP packages and operate over a junction temperature range of –40°C to 125°C.
AVAILABLE OPTIONS
PACKAGED DEVICES
T
J
SOIC
(D)
TSSOP
(PWP)
TPS2834D
TPS2835D
TPS2834PWP
TPS2835PWP
–40°C to 125°C
The D and PWP packages are available taped and reeled. Add R
suffix to device type (e.g., TPS2834DR)
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.
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.
1
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