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T494C156K010AS Datasheet(PDF) 1 Page - Texas Instruments |
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T494C156K010AS Datasheet(HTML) 1 Page - Texas Instruments |
1 / 25 page TPS60111 REGULATED 5V 150mA LOW NOISE CHARGE PUMP DC/DC CONVERTER SLVS216B − JUNE 1999 − JUNE 2008 1 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 features D Up to 150-mA Output Current D Less Than 10-mVpp Output Voltage Ripple D No Inductors Required/Low EMI D Regulated 5-V ±4% Output D Only Four External Components Required D Up to 90% Efficiency D 2.7-V to 5.4-V Input Voltage Range D 60-µA Quiescent Supply Current D 0.05-µA Shutdown Current D Load Isolated in Shutdown D Space-Saving Thermally-Enhanced TSSOP PowerPAD Package D 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 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). Copyright 1999 − 2008, 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. 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. PowerPAD is a trademark of Texas Instruments Incorporated. output voltage ripple typical operating circuit Figure 1 SKIP =COM = CLK = 0 V VIN = 3.6 V IO = 150 mA CO = 22 µF + 10 µF X5R Ceramic 5.2 5 5.05 5.1 5.15 4.8 4.85 4.9 4.95 5 2.5 0 0.5 1 1.5 2 3 3.5 4 4.5 t − Time − µs IN IN C1+ C1− ENABLE OUT OUT FB C2+ C2− SYNC SKIP COM CLK PGND GND INPUT 2.7 V to 5.4 V CIN 4.7 µF OUTPUT 5 V 150 mA CO 15 µF C2F 1 µF C1F 1 µF + OFF/ON TPS60110 + |
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