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TPS60204 Datasheet

  • TPS60204

  • 具有電池低電量指示信號的穩(wěn)壓 3.3V 低紋波充電泵

  • 19頁

  • TI

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TPS60204, TPS60205
REGULATED 3.3-V, 100-mA LOW-RIPPLE CHARGE PUMP
LOW POWER DC/DC CONVERTERS
SLVS354A 鈥?FEBRUARY 2001 鈥?REVISED SEPTEMBER 2001
features
D
Compact Converter Solution in UltraSmall
D
10-pin MSOP With Only Four External
Capacitors Required
Evaluation Module Available
(TPS60200EVM-145)
D
Regulated 3.3-V Output Voltage With up to
D
D
D
D
D
D
路
100-mA Output Current From a 1.8-V to
3.6-V Input Voltage
Less Than 5-mV
(PP)
Output Voltage Ripple
Achieved With Push-Pull Topology
Integrated Low-Battery and Power-Good
Detector
Switching Frequency Can Be Synchronized
to External Clock Signal
Extends Battery Usage With up to 90%
Efficiency and 35-碌A(chǔ) Quiescent Supply
Current
Easy-to-Design, Low Cost, Low EMI Power
Supply Since No Inductors Are Used
0.05-碌A(chǔ) Shutdown Current, Battery is
Isolated From Load in Shutdown Mode
applications
D
Replaces DC/DC Converters With Inductors
in Battery Powered Applications Like:
鈥?Two Battery Cells to 3.3-V Conversion
鈥?MP3 Portable Audio Players
鈥?Battery-Powered Microprocessor
Systems
鈥?Backup-Battery Boost Converters
鈥?PDA鈥檚, Organizers, and Cordless Phones
鈥?Handheld Instrumentation
鈥?Glucose Meters and Other Medical
Instruments
description
The TPS6020x step-up, regulated charge pumps generate a 3.3-V
鹵4%
output voltage from a 1.8-V to 3.6-V
input voltage. The devices are typically powered by two Alkaline, NiCd, or NiMH battery cells and operate down
to a minimum supply voltage of 1.6 V. Continuous output current is a minimum of 100 mA from a 2-V input. Only
four external capacitors are needed to build a complete low-ripple dc/dc converter. The push-pull operating
mode of two single-ended charge pumps assures the low output voltage ripple, as current is continuously
transferred to the output.
INPUT
1.6 V to 3.6 V
Ci
2.2
碌F
R1
1
R2
4
C1
1
碌F
3
9
OFF/ON
C1+
C1鈥?/div>
EN
GND
2
LBI
LBO
10
Low Battery
Warning
I O 鈥?Peak Output Current 鈥?mA
TPS60204
7
IN
OUT
OUTPUT
3.3 V, 100 mA
Co
2.2
碌F
TPS60204
5
R3
PEAK OUTPUT CURRENT
vs
INPUT VOLTAGE
350
300
250
200
150
100
50
0
1.6
C2+
C2鈥?/div>
6
8
C2
1
碌F
Figure 1. Typical Application Circuit
With Low-Battery Warning
2.0
2.4
2.8
3.2
VI 鈥?Input Voltage 鈥?V
3.6
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
錚?/div>
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.
POST OFFICE BOX 655303
鈥?/div>
DALLAS, TEXAS 75265
1

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