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188宝金博页面版: ME2129系列-E30

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内容提示: Nanjing Micro One Electronics Inc. 1/13 TEL: 025-847311 86 www. microne. com. cn ULTRA-SMALL PACKAGE PWM/PFM SWITCHING CONTROL STEP-UP SWITCHING REGULATOR Ver 03 ULTRA-SMALL PACKAGE PWM/PFM SWITCHING CONTROL STEP-UP SWITCHING REGULATOR Feature: Selection Guide: Description: The ME21 29 series is a CMOS step-up switching regulator which mainly consists of a reference voltage source, an oscillation circuit, an error amplifier, a phase compensat...

文档格式:PDF | 页数:13 | 浏览次数:33 | 上传日期:2012-07-25 21:14:52 | 文档星级:
Nanjing Micro One Electronics Inc. 1/13 TEL: 025-847311 86 www. microne. com. cn ULTRA-SMALL PACKAGE PWM/PFM SWITCHING CONTROL STEP-UP SWITCHING REGULATOR Ver 03 ULTRA-SMALL PACKAGE PWM/PFM SWITCHING CONTROL STEP-UP SWITCHING REGULATOR Feature: Selection Guide: Description: The ME21 29 series is a CMOS step-up switching regulator which mainly consists of a reference voltage source, an oscillation circuit, an error amplifier, a phase compensation circuit, a PWM/PFM switching control circuit. With an external low-ON-resistance Nch Power MOS, this product is applicable to applications requiring high efficiency and high output current. The ME21 29 series switches its operation to the PFM control circuit whose duty ratio is 15 % with to the PWM/PFM switching control circuit under a light load and to prevent decline in the efficiency by IC operation current. l Low voltage operation: Start-up is guaranteed from 0.9 V(IOUT =1 mA ) l Duty ratio: Built-in PWM/PFM switching control circuit 1 5 to 78 % . l oscillator frequency: 300KHz l External parts: coil, diode, capacitor, and transistor l Output voltage range: 1.5V ~6.5 V l Output voltage accuracy: ±2% l Soft start function: 2 ms. l PACKAGE: SOT-23-5 Typical Application: l Mobile phones (PDC, GSM, CDMA, IMT200 etc.) l Bluetooth equipment l PDA l Portable communication modem l Portable games l Cameras l Digital cameras l Cordless phones l Notebook computers

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