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LMK212BJ225MG PDF预览

LMK212BJ225MG

更新时间： 2024-11-27 22:11:31
品牌 Logo 应用领域
德州仪器 - TI 泵
页数 文件大小 规格书
23页 431K
描述
UNREGULATED 60-mA CHARGE PUMP VOLTAGE INVERTER

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LMK212BJ225MG 数据手册

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TPS60400, TPS60401, TPS60402, TPS60403  
UNREGULATED 60-mA CHARGE PUMP VOLTAGE INVERTER  
SLVS324 – JULY 2001  
features  
applications  
D
Inverts Input Supply Voltage  
Up to 60-mA Output Current  
D
D
D
D
D
D
LCD Bias  
D
GaAs Bias for RF Power Amps  
Sensor Supply in Portable Instruments  
Bipolar Amplifier Supply  
Medical Instruments  
D
D
D
Only Three Small 1-µF Ceramic Capacitors  
Needed  
Input Voltage Range From 1.6 V to 5.5 V  
PowerSave-Mode for Improved Efficiency  
at Low Output Currents (TPS60400)  
Battery-Operated Equipment  
DBV PACKAGE  
(TOP VIEW)  
D
Device Quiescent Current Typical 100 µA  
D
Integrated Active Schottky-Diode for  
Start-Up Into Load  
1
2
3
5
4
C
FLY+  
OUT  
IN  
D
D
Small 5-Pin SOT23 Package  
Evaluation Module Available  
TPS60400EVM–178  
GND  
C
FLY–  
description  
The TPS6040x is a family of devices that generate an unregulated negative output voltage from an input voltage  
ranging from 1.6 V to 5.5 V. The devices are typically supplied by a preregulated supply rail of 5 V or 3.3 V. Due  
to its wide input voltage range, two or three NiCd, NiMH, or alkaline battery cells, as well as one Li-Ion cell can  
also power them.  
Only three external 1-µF capacitors are required to build a complete dc/dc charge pump inverter. Assembled  
2
in a 5-pin SOT23 package, the complete converter can be built on a 50 mm board area. Additional board area  
and component count reduction is achieved by replacing the Schottky diode that is typically needed for start-up  
into load by integrated circuitry.  
The TPS6040x can deliver a maximum output current of 60 mA with a typical conversion efficiency of greater  
than 90% over a wide output current range. Three device options with 20-kHz, 50-kHz, and 250-kHz fixed  
frequency operation are available. One device comes with a variable switching frequency to reduce operating  
current in applications with a wide load range and enables the design with low-value capacitors.  
typical application circuit  
TPS60400  
OUTPUT VOLTAGE  
vs  
INPUT VOLTAGE  
C
1 µF  
(fly)  
0
–1  
–2  
–3  
–4  
–5  
I
O
= 60 mA  
3
5
I
O
= 30 mA  
C
C
FLY+  
FLY–  
I
O
= 1 mA  
TPS60400  
Output  
–1.6 V to –5 V,  
Max 60 mA  
2
1
Input  
IN  
OUT  
1.6 V to 5.5 V  
C
1 µF  
C
O
1 µF  
I
GND  
4
T
A
= 25°C  
0
1
2
3
4
5
V – Input Voltage – V  
I
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 2001, 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.  
1
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265  
1234567...23

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