TPS2834_15 Datasheet, PDF (1/25 Pages) Texas Instruments – SYNCHRONOUS-BUCK MOSFET DRIVERS WITH DEAD-TIME CONTROL

D Floating Bootstrap or Ground-Reference
High-Side Driver
D Adaptive Dead-Time Control
D 50-ns Max Rise/Fall Times With 3.3-nF Load
D 2.4-A Typical Output Current
D 4.5-V to 15-V Supply Voltage Range
D TTL-Compatible Inputs
D Internal Schottky Bootstrap Diode
D SYNC Control for Synchronous or
Nonsynchronous Operation
D CROWBAR for OVP, Protects Against
Faulted High-Side Power FETs
D Low Supply Current....3 mA Typical
D Ideal for High-Current Single or Multiphase
Power Supplies
D −40°C to 125°C Operating Virtual Junction
Temperature Range
D Available in SOIC and TSSOP PowerPAD
Packages
TPS2834, TPS2835
SYNCHRONOUSĆBUCK MOSFET DRIVERS
WITH DEADĆTIME CONTROL
SLVS223B − NOVEMBER 1999 − REVISED AUGUST 2002
D PACKAGE
(TOP VIEW)
ENABLE
1
IN
2
CROWBAR
3
NC
4
SYNC
5
DT
6
PGND
7
14
BOOT
13
NC
12
HIGHDR
11
BOOTLO
10
LOWDR
9
NC
8
V_CC
ENABLE
IN
CROWBAR
NC
SYNC
DT
PGND
PWP PACKAGE
(TOP VIEW)
1
14
2
13
3
12
4
Thermal
Pad
11
5
10
6
9
7
8
NC − No internal connection
BOOT
NC
HIGHDR
BOOTLO
LOWDR
NC
V_CC
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-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 driver
is configured as a nonsynchronous-buck driver disabling the low-side 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 thermally enhanced TSSOP PowerPAD packages and operate over a junction
temperature range of −40°C to 125°C.
DEVICE NAME
TPS2830
TPS2831
TPS2832
TPS2833
TPS2836
TPS2837
Related Synchronous MOSFET Drivers
ADDITIONAL FEATURES
INPUTS
ENABLE, SYNC, and CROWBAR
CMOS
Noninverted
Inverted
W/O ENABLE, SYNC, and CROWBAR CMOS
Noninverted
Inverted
W/O ENABLE, SYNC, and CROWBAR TTL
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.
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  2002, Texas Instruments Incorporated
• POST OFFICE BOX 655303 DALLAS, TEXAS 75265
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