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TPS60205DGSTIN/a1138avaiRegulated 3.3-V Low Ripple Charge Pump with Power Good Indicator


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TPS60205DGS
Regulated 3.3-V Low Ripple Charge Pump with Power Good Indicator
Less Than 5-mV(PP) Output Voltage RippleAchieved 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-µA Quiescent Supply
Current
Easy-to-Design, Low Cost, Low EMI Power
Supply Since No Inductors Are Used
0.05-µA Shutdown Current, Battery is
Isolated From Load in Shutdown Mode
applications
Replaces DC/DC Converters With Inductors
in Battery Powered Applications Like:
− Two Battery Cells to 3.3-V Conversion
− MP3 Portable Audio Players
− Battery-Powered Microprocessor
Systems
− Backup-Battery Boost Converters
− PDA’s, Organizers, and Cordless Phones
− Handheld Instrumentation
− Glucose Meters and Other Medical
Instruments

·
description

The TPS6020x step-up, regulated charge pumps generate a 3.3-V ±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.
Figure 1. Typical Application Circuit
With Low-Battery Warning
OUTPUT
INPUT
1.6 V to 3.6 V
OFF/ON
TPS60204
TPS60204
PEAK OUTPUT CURRENT
INPUT VOLTAGE
1001.6 2.0 2.4 2.8
3.2 3.6
VI − Input Voltage − V
− Peak Output Current − mA1 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.
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