MOSFET Drivers. TPS2839 Datasheet

TPS2839 Datasheet PDF, Equivalent


Part Number

TPS2839

Description

Synchronous-Buck MOSFET Drivers

Manufacture

etcTI

Total Page 23 Pages
PDF Download
Download TPS2839 Datasheet PDF


TPS2839 Datasheet
TPS2838, TPS2839
TPS2848, TPS2849
ą
SLVS367A − MARCH 2001 − REVISED JUNE 2001
SYNCHRONOUSĆBUCK MOSFET DRIVERS
WITH DRIVE REGULATOR
FEATURES
D Integrated Drive Regulator (4 V to 14 V)
D Adjustable/Adaptive Dead-Time Control
D 4-A Peak current at VDRV of 14 V
D 10-V to 15-V Supply Voltage Range
D TTL-Compatible Inputs
D Internal Schottky Diode Reduces Part Count
D Synchronous or Nonsynchronous Operation
D Inverting and Noninverting Options
D TSSOP PowerPadPackage for Excellent
Thermal Performance
APPLICATIONS
D Single or Multiphase Synchronous-Buck
Power Supplies
D High-Current DC/DC Power Modules
DESCRIPTION
The TPS2838/39/48/49 devices are MOSFET
drivers designed for high-performance
synchronous power supplies. The drivers can
source and sink up to 4-A peak current at a 14-V
drive voltage. These are ideal devices to use with
power supply controllers that do not have on-chip
drivers. The low-side driver is capable of driving
loads of 3.3 nF in 10-ns rise/fall times and has
40-ns propagation delays at room temperature.
The MOSFET drivers have an integrated 150-mA
regulator, so the gate drive voltage can be
optimized for specific MOSFETs. The TPS2848
and TPS2849 have a fixed 8-V drive regulator,
while the TPS2838/39 allow the drive regulator to
be adjusted from 4 V to 14 V by selection of two
external resistors.
The devices feature VDRV to PGND shoot-
through protection with adaptive/adjustable
deadtime control. The deadtime, for turning on the
high-side FET from LOWDR transitioning low, is
adjustable with an external capacitor on the
DELAY pin. This allows compensation for the
effect the gate resistor has on the synchronous
FET turn off. The adaptive deadtime prevents the
turning on of the low-side FET until the voltage on
the BOOTLO pin falls below a threshold after the
high-side FET stops conducting. The high-side
drive can be configured as a ground referenced
driver or a floating bootstrap driver. The internal
Schottky diode minimizes the size and number of
external components needed for the bootstrap
driver circuit. Only one external ceramic capacitor
is required to configure the bootstrap driver.
TPS2838, TPS2839
PWP PACKAGE
(TOP VIEW)
TPS2848, TPS2849
PWP PACKAGE
(TOP VIEW)
ENABLE
IN
PWRRDY
DELAY
SYNC
ADJ
DT
AGND
1 16
2 15
3 14
4 Thermal 13
5 Pad 12
6 11
7 10
89
BOOT
HIGHDR
BOOTLO
VCC
VDRV
LOWDR
NC
PGND
ACTUAL SIZE
(5,1 mm x 6,6 mm)
ENABLE
IN
PWRRDY
DELAY
NC
ACTUAL SIZE
DT
(5,1 mm x 6,6 mm) AGND
1 14
2 13
3 12
4
Thermal
Pad
11
5 10
69
78
BOOT
HIGHDR
BOOTLO
VCC
VDRV
LOWDR
PGND
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.
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 2001, Texas Instruments Incorporated
www.ti.com
1

TPS2839 Datasheet
TPS2838, TPS2839
TPS2848, TPS2849
ą
SLVS367A − MARCH 2001 − REVISED JUNE 2001
description (continued)
The SYNC pin can be used regardless of load to disable the synchronous FET driver and operate the power
supply nonsynchronously.
A power ready/undervoltage lockout function outputs the status of the VCC-pin voltage and driver regulator
output on the open-drain PWRRDY pin. This feature can be used to enable a controller’s output once the VCC
voltage reaches the threshold and the regulator output is stable. This function ensures both FET drivers are off
when the VCC voltage is below the voltage threshold.
The TPS2838/39/48/49 devices are offered in the thermally enhanced 14-pin and 16-pin PowerPAD TSSOP
package. The PowerPAD package features an exposed leadframe on the bottom that can be soldered to the
printed-circuit board to improve thermal efficiency. The TPS2838/48 are noninverting control logic while the
TPS2839/49 drivers are inverting control logic.
2 www.ti.com


Features Datasheet pdf TPS2838, TPS2839 TPS2848, TPS2849 ą SL VS367A − MARCH 2001 − REVISED JUNE 2001 SYNCHRONOUSĆBUCK MOSFET DRIVERS W ITH DRIVE REGULATOR FEATURES D Integra ted Drive Regulator (4 V to 14 V) D Adj ustable/Adaptive Dead-Time Control D 4- A Peak current at VDRV of 14 V D 10-V t o 15-V Supply Voltage Range D TTL-Compa tible Inputs D Internal Schottky Diode Reduces Part Count D Synchronous or Non synchronous Operation D Inverting and Noninverting Options D TSSOP PowerPad Package for Excellent Thermal Perform ance APPLICATIONS D Single or Multiphas e Synchronous-Buck Power Supplies D Hig h-Current DC/DC Power Modules DESCRIPT ION The TPS2838/39/48/49 devices are MO SFET drivers designed for high-performa nce synchronous power supplies. The dri vers can source and sink up to 4-A peak current at a 14-V drive voltage. These are ideal devices to use with power su pply controllers that do not have on-ch ip drivers. The low-side driver is capa ble of driving loads of 3.3 nF in 10-ns rise/fall times and has 40-ns p.
Keywords TPS2839, datasheet, pdf, etcTI, Synchronous-Buck, MOSFET, Drivers, PS2839, S2839, 2839, TPS283, TPS28, TPS2, Equivalent, stock, pinout, distributor, price, schematic, inventory, databook, Electronic, Components, Parameters, parts, cross reference, chip, Semiconductor, circuit, Electric, manual, substitute




@ 2014 :: Datasheetspdf.com :: Semiconductors datasheet search & download site (Privacy Policy & Contact)