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參數(shù)資料
| 型號： | TPS6734I |
| 廠商： | Texas Instruments, Inc. |
| 英文描述： | FIXED 12-V 120-mA BOOST-CONVERTER SUPPLY |
| 中文描述： | 固定12伏120毫安升壓轉(zhuǎn)換器供電 |
| 文件頁數(shù)： | 1/19頁 |
| 文件大小： | 285K |
| 代理商： | TPS6734I |
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.
TPS6734I
FIXED 12-V 120-mA BOOST-CONVERTER SUPPLY
SLVS127A – AUGUST 1995 – REVISED JANUARY 1999
1
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
Pin-for-Pin Compatible With MAX734
Programming Voltage for Flash Memory
2.7-V to 11-V Input Operating Range
Output Current of 120 mA or Greater From
3.75-V or Higher Input
3-
μ
A Maximum Supply Current in
Shutdown
Only 5 External Components Required
High Efficiency . . . 85% Typical (5-V Input,
120-mA Output)
8-Pin SOIC and DIP Packages
–40
°
C to 85
°
C Free-Air Operating
Temperature Range
description
The TPS6734 is a fixed 12-V output boost converter capable of delivering 120 mA from inputs as low as
3.75 V. The device is pin-for-pin compatible with the MAX734 regulator and offers the following advantages:
lower supply current, wider operating input-voltage range, and higher output currents. As shown in Figure 1,
the only external components required are: an inductor, a Schottky rectifier, an output filter capacitor, an input
filter capacitor, and a small capacitor for loop compensation. The entire converter occupies less than 0.7 in
2
of
PCB space when implemented with surface-mount components. An enable input is provided to shut down the
converter and reduce the supply current to 3
μ
A when 12 V is not needed.
The TPS6734 is a 170-kHz current-mode PWM ( pulse-width modulation) controller with an n-channel MOSFET
power switch. Gate drive for the switch is derived from the 12-V output after start-up to minimize the die area
needed to realize the 0.7-
MOSFET and improve efficiency at input voltages below 5 V. Soft start is
accomplished with the addition of one small capacitor. A 1.22-V reference (pin 2) is brought out for external use.
High efficiency at low supply voltages and low supply current in shutdown make the TPS6734 particularly
attractive for flash memory programming supplies, PCMCIA cards, and operational amplifiers in
battery-powered equipment. The TPS6734 is available in 8-pin DIP and SOIC packages and operates over a
free-air temperature range of –40
°
C to 85
°
C.
VCC
FB
OUT
GND
EN
REF
SS
COMP
1
2
3
4
8
7
6
5
TPS6734
0.001
μ
F
18
μ
H
1A, 20 V
VI
3.75 V to 12 V
ENABLE
+
33
μ
F
VO
12 V, 120 mA
Figure 1. Typical Operating Circuit
1
2
3
4
8
7
6
5
EN
REF
SS
COMP
V
CC
FB
OUT
GND
D OR P PACKAGE
(TOP VIEW)
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
1999, Texas Instruments Incorporated
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| TPS6734ID | 功能描述:直流/直流開關(guān)調(diào)節(jié)器 120mA 12V RoHS:否 制造商:International Rectifier 最大輸入電壓:21 V 開關(guān)頻率:1.5 MHz 輸出電壓:0.5 V to 0.86 V 輸出電流:4 A 輸出端數(shù)量: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:PQFN 4 x 5 |
| TPS6734IDG4 | 功能描述:直流/直流開關(guān)調(diào)節(jié)器 120mA 12V RoHS:否 制造商:International Rectifier 最大輸入電壓:21 V 開關(guān)頻率:1.5 MHz 輸出電壓:0.5 V to 0.86 V 輸出電流:4 A 輸出端數(shù)量: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:PQFN 4 x 5 |
| TPS6734IDR | 功能描述:直流/直流開關(guān)調(diào)節(jié)器 120mA 12V RoHS:否 制造商:International Rectifier 最大輸入電壓:21 V 開關(guān)頻率:1.5 MHz 輸出電壓:0.5 V to 0.86 V 輸出電流:4 A 輸出端數(shù)量: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:PQFN 4 x 5 |
| TPS6734IDRG4 | 功能描述:直流/直流開關(guān)調(diào)節(jié)器 Fixed 12-V 120-MA Boost-Conv Supply RoHS:否 制造商:International Rectifier 最大輸入電壓:21 V 開關(guān)頻率:1.5 MHz 輸出電壓:0.5 V to 0.86 V 輸出電流:4 A 輸出端數(shù)量: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:PQFN 4 x 5 |
| TPS6734IP | 功能描述:直流/直流開關(guān)調(diào)節(jié)器 120mA 12V RoHS:否 制造商:International Rectifier 最大輸入電壓:21 V 開關(guān)頻率:1.5 MHz 輸出電壓:0.5 V to 0.86 V 輸出電流:4 A 輸出端數(shù)量: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:PQFN 4 x 5 |
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