TPS6755 Datasheet, PDF (1/16 Pages) Texas Instruments – ADJUSTABLE INVERTING DC/DC CONVERTER

TPS6755
ADJUSTABLE INVERTING DC/DC CONVERTER
D 1-W Output (V_CC ≥ 4.5 V)
D 2.7-V to 9-V Input Operating Range
D 78% Typical Efficiency
D 160-kHz Fixed-Frequency Current-Mode
PWM Controller
D EN Input Inhibits Operation and Reduces
Supply Current to 1 µA
D Output Voltage Limited to  V_O ≤ 12 V– V_CC
D Soft Start
D 8-Pin SOIC and DIP Packages
D – 40°C to 85°C Free-Air Temperature Range
D Pin-for-Pin Compatible with MAX755
SLVS155A – NOVEMBER 1996 REVISED DECEMBER 1996
D OR P PACKAGE
(TOP VIEW)
EN 1
REF 2
SS 3
COMP 4
8 V_CC
7 OUT
6 GND
5 FB
description
The TPS6755 is an adjustable inverting dc/dc converter capable of operating from inputs as low as 2.7 V. The
only external components required are an inductor, an output filter capacitor, an input filter capacitor, a reference
filter capacitor, two resistors, and a Schottky rectifier. An enable input is provided to shut down the inverter when
an output voltage is not needed. The typical supply current is 1.9 mA at no-load and is further reduced to 1-µA
when the enable input is low.
The device features a 160-kHz current-mode pulse-width-modulation (PWM) controller with a p-channel
MOSFET power switch. The gate drive uses the converter output to reduce the die area needed to realize the
0.4-Ω 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 µA.
The TPS6755 is attractive for board-level dc/dc conversion in computer peripherals and in battery-powered
equipment requiring high efficiency and low supply current.
Available in an 8-pin DIP or an 8-pin SOIC package, the TPS6755 operates over a free-air temperature range
of – 40°C to 85°C.
VI
2.7 V to 9 V
+
47 µF
TPS6755
ENABLE
+
10 µF
10.2 kΩ
82 pF†
1
EN
2
REF
3
SS
4
COMP
8
VCC
7
OUT
6
GND
5
FB
42.2 kΩ
† _{Not required for loads of 100 mA or less}
1 µF ^1N5817
10 µH
Figure 1. Typical Circuit
–5V
100 µF
+
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.
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.
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Copyright © 1996, Texas Instruments Incorporated
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