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TPS6735D Datasheet

  • TPS6735D

  • FIXED NEGATIVE 5-V 200-mA INVERTING DC/DC CONVERTER

  • 307.50KB

  • 18頁

  • TI

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TPS6735
FIXED NEGATIVE 5-V 200-mA INVERTING DC/DC CONVERTER
SLVS141A 鈥?JULY 1996 鈥?REVISED JANUARY 1997
D
D
D
D
D
D
D
D
D
Negative 5-V 200-mA Output (V
CC
鈮?/div>
4.5 V)
4-V to 6.2-V Input Operating Range
78% Typical Efficiency
160-kHz Fixed-Frequency Current-Mode
PWM Controller
EN Input Inhibits Operation and Reduces
Supply Current to 1
碌A(chǔ)
Soft Start
8-Pin SOIC and DIP Packages
鈥?0擄C to 85擄C Free-Air Temperature Range
Pin-for-Pin Compatible with MAX735
D OR P PACKAGE
(TOP VIEW)
EN
REF
SS
COMP
1
2
3
4
8
7
6
5
V
CC
OUT
GND
FB
description
The TPS6735 is a fixed negative 5-V output inverting dc/dc converter capable of delivering 200 mA from inputs
as low as 4.5 V. The only external components required are an inductor, an output filter capacitor, an input filter
capacitor, a reference filter capacitor, and a Schottky rectifier. An enable input is provided to shut down the
inverter when a 鈥?-V output is not needed. The typical supply current is 1.9 mA at no-load and is further reduced
to 1-碌A(chǔ) when the enable input is low.
The TPS6735 is a 160-kHz current-mode pulse-width-modulation (PWM) controller with a p-channel MOSFET
power switch. The gate drive uses the 鈥?-V output to reduce the die area needed to realize the 0.4-鈩?MOSFET.
Soft start is accomplished with the addition of one small capacitor at SS. A 1.22-V reference is available for
external loads up to 125
碌A(chǔ).
The TPS6735 is attractive for board-level dc/dc conversion in computer peripherals and in battery-powered
equipment requiring high efficiency and low supply current.
The TPS6735 is available in 8-pin DIP and SOIC packages and operates over a free-air temperature range of
鈥?0擄C to 85擄C.
VI
4 V to 6.2 V
+
47
碌F
1
2
TPS6735
EN
REF
SS
COMP
VCC
OUT
GND
FB
8
7
6
5
10
碌H
+
1
碌F
1N5817
鈥?V
100
碌F
ENABLE
+
10
碌F
3
4
82 pF鈥?/div>
鈥?Not required for loads of 100 mA or less
Figure 1. Typical Circuit
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
漏
1997, 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.
POST OFFICE BOX 655303
鈥?/div>
DALLAS, TEXAS 75265
1

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