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RT9262CS 数据表(PDF) 1 Page - Richtek Technology Corporation |
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RT9262CS 数据表(HTML) 1 Page - Richtek Technology Corporation |
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1 / 12 page  Preliminary RT9262/A DS9262/A-04 August 2002 www.richtek.com 1 High Efficiency, Low Supply Current, Step-up DC/DC Converter General Description The RT9262/A is a compact, high efficient, step-up DC/DC converter with an adaptive current mode PWM control loop, providing a stable and high efficient operation over a wide range of load currents. It operates in both continuous and discontinuous current modes in stable waveforms without external compensation. The low start-up input voltage below 1V makes RT9262/A suitable for 1 to 4 battery cell applications providing up to 400mA output current. The 550KHz high switching rate minimized the size of external components. Besides, the 17 µA low quiescent current together with high efficiency maintains long battery lifetime. The 1.8V to 5V output voltage is set with 2 external resistors. Both internal 2A switch and driver for driving external power devices (NMOS or NPN) are provided. A 300mA LDO is included in RT9262 to provide a secondary low noise output as well as an output current stop in the shutdown mode. Similarly, a 1.8V to 5V LDO output voltage can be set with 2 external resistors. For RT9262A, a low battery detector with 0.86V detection voltage is included. RT9262/A are provided in SOP-8 packages. Ordering Information RT9262A Features 1.0V Low Start-up Input Voltage High Supply Capability to Deliver 3.3V 100mA with 1V Input Voltage 17 µA Quiescent (Switch-off) Supply Current 90% Efficiency 550KHz Fixed Switching Rate Providing Flexibility for Using Internal and External Power Switches Built-in 300mA LDO, also for the Zero-Output- Current Shutdown Mode (RT9262) Boost DC-DC Integrating LDO for Up-Down Regulation (RT9262) Built-in 0.86V Voltage Detector (RT9262A) 8-Pin SOP Package Applications PDA Portable Instrument Wireless Equipment DSC LCD Back Bias Circuit RF-Tags Pin Configurations Part Number Pin Configurations RT9262CS (Plastic SOP-8) TOP VIEW RT9262ACS (Plastic SOP-8) TOP VIEW Operating temperature range C: Commercial standard Package type S : SOP-8 A : Include low battery detector Default : Include LDO GND EXT LFB LDOO CE LX VDD FB 1 2 3 4 8 7 6 5 GND EXT LBO LBI CE LX VDD FB 1 2 3 4 8 7 6 5 |
类似零件编号 - RT9262CS |
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类似说明 - RT9262CS |
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