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RT9901 データシート(PDF) 1 Page - Richtek Technology Corporation |
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RT9901 データシート(HTML) 1 Page - Richtek Technology Corporation |
1 / 19 page RT9901 Preliminary 1 DS9901-12 August 2007 www.richtek.com Features 1.5V to 5.5V Battery Input Voltage Range Main step-up DC-DC Converter 1.5V to 5.5V Adjustable Output Voltage Up to 90% Efficiency 2.6A, 0.3 Ω Ω Ω Ω Ω Internal Power Switch Two Step-Down DC-DC Converters 0.8V to 5.5V Adjustable Output Voltage 94% Efficiency 100% Duty Cycle Step-up Charge Pump for Micro-Controller Build-in 0.8V Voltage Detector Up to 1.4MHz Switching Frequency 1 μμμμμA Supply Current in Shutdown Mode Programmable Soft Start Function Independent Enable Pin (CH1, CH2, CH3) External Compensation Network (CH1, CH2, CH3) Short Circuit Protection (CH1, CH2, CH3) Over Voltage Protection (CH2) 32-Lead VQFN Package RoHS Compliant and 100% Lead (Pb)-Free Applications Digital Still Camera PDAs Portable Device 4 Channel DC/DC Converters IC with High-Efficiency Step-Up and Step-Down Ordering Information General Description The RT9901 is a complete power-supply solution for digital still cameras and other hand-held devices. It integrates a high-efficiency main step-up DC-DC converter, two high- efficiency step-down converters, a charge pump, and voltage detector. The RT9901 is targeted for applications that use either two or three AA cells or a single lithiumion battery. The main step-up DC-DC converter accepts inputs from 1.5V to 5.5V and build in 2.6A Internal switch. The two step-down DC-DC converters (CH2, CH3) accept inputs from 1.5V to 5.5V and regulate a resistor-adjustable output from 0.8V to 5.5V. Each DC-DC converters have independent shutdown inputs. The feature of the charge pump is to deliver few current to micro-controller when the system operates in the standby mode. RT9901 include a low battery detector with 0.8V detection voltage. An adjustable operating frequency (up to 1.4MHZ) is utilized to get optimum size, cost, and efficiency. RT9901 is available in VQFN-32L 5x5 package. Pin Configurations (TOP VIEW) VQFN-32L 5x5 Note : Richtek Pb-free and Green products are : RoHS compliant and compatible with the current require- ments of IPC/JEDEC J-STD-020. Suitable for use in SnPb or Pb-free soldering processes. 100% matte tin (Sn) plating. RT9901 Package Type QV : VQFN-32L 5x5 (V-Type) Operating Temperature Range P : Pb Free with Commercial Standard G : Green (Halogen Free with Commer- cial Standard) COMP3 VDD3 LX3 PGND3 SS LBO RT GND VDD2 VDD2 LX2 LX2 PGND2 LX1 LX1 VDD1 1 2 3 4 5 6 7 21 20 19 18 17 16 15 8 910 11 12 14 13 28 27 26 25 24 22 23 32 31 30 29 GND 33 |
同様の部品番号 - RT9901 |
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同様の説明 - RT9901 |
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