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TPS60111 Datasheet

Part NameDescriptionManufacturer
TPS60111 REGULATED 5-V 150-mA LOW-NOISE CHARGE PUMP DC/DC CONVERTER TI
Texas Instruments TI
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description
The TPS60111 step-up, regulated charge pump generates a 5-V ±4% output voltage from a 2.7-V to 5.4-V input voltage (three alkaline, NiCd, or NiMH batteries; or, one lithium or lithium ion battery). Output current is 150 mA from a 3-V input. Only four external capacitors are needed to build a complete low-noise 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. From a 3-V input, the TPS60111 can start into full load with loads as low as 33 Ω.
The TPS60111 features either constant frequency mode to minimize noise and output voltage ripple or the power-saving pulse-skip mode to extend battery life at light loads. The TPS60111 switching frequency is 300 kHz. The logic shutdown function reduces the supply current to 1-µA (max) and disconnects the load from the input. Special current-control circuitry prevents excessive cur rent from being drawn from the battery during start-up. This dc/dc converter requires no inductors and has low EMI. It is available in the small 20-pin TSSOP PowerPAD™ package (PWP).

features
● Up to 150-mA Output Current
● Less Than 10-mV
   pp Output Voltage Ripple
● No Inductors Required/Low EMI
● Regulated 5-V ±4% Output
● Only Four External Components Required
● Up to 90% Efficiency
● 2.7-V to 5.4-V Input Voltage Range
● 60-µA Quiescent Supply Current
● 0.05-µA Shutdown Current
● Load Isolated in Shutdown
● Space-Saving Thermally-Enhanced TSSOP
   PowerPAD™ Package
● Evaluation Module Available
   (TPS60110EVM−132)

applications
Replaces DC/DC Converters With Inductors in
   − Battery-Powered Applications
   − Li-Ion Battery to 5-V Conversion
   − Portable Instruments
   − Battery-Powered Microprocessor
      Systems
   − Miniature Equipment
   − Backup-Battery Boost Converters
   − PDAs
   − Laptops
   − Handheld Instrumentation
   − Medical Instruments

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