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CM3016-48ST Datasheet(PDF) 1 Page - California Micro Devices Corp |
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CM3016-48ST Datasheet(HTML) 1 Page - California Micro Devices Corp |
1 / 10 page © 2004 California Micro Devices Corp. All rights reserved. 430 N. McCarthy Blvd., Milpitas, CA 95035-5112 ● Tel: 408.263.3214 ● Fax: 408.263.7846 ● www.calmicro.com CM3016-48 V2.XX 12/22/04 1 Micropower, 4.75V/500mA Low Noise CMOS LDO Regulator Features • Linear LDO regulator with 4.75V output • 500mA output current capability - 500mA peak in SOT-23 package • 500mV maximum dropout voltage at full load • 150mV maximum dropout at 150mA load • Excellent line and load regulation • Stable with low ESR output capacitor • Ultra low noise with optional bypass capacitor • Fast power-up with bypass capacitor • "Zero" current in Shutdown mode • Thermal Overload Protection • Foldback Current Limiting Protection • Reverse current protection • Lead-free version available Applications • Notebook computers • Consumer and personal electronics • Ideal for powering audio codecs Product Description The CM3016-48 is a CMOS linear voltage regulator with low quiescent current, very low drop out voltage and better than 1% initial output voltage accuracy. The quiescent cur- rent is typically 150 µA at light loads and only 165µA at 500mA. This is 5% more efficient than equivalent Bi-CMOS devices that can waste up to 25mA at 500mA load. The CM3016-48 can maintain load regulation for peak currents up to 500mA, which is useful for supplying inrush currents during power-up and transient conditions. Continuous out- put current is limited by package type and board layout. A dedicated control input (EN, Active High) has been included for power-up sequencing flexibility. When this input is taken low, the regulator is disabled. In this state, the sup- ply current will drop to near zero. The device also features reverse current protection. This protects the device by blocking the pass transistors parasitic diode when the out- put voltage is forced higher than the input. For low noise performance and increased power supply rip- ple rejection a noise bypass capacitor can be connected to the BYP pin. Connecting this capacitor will not significantly delay the speed of power-up. The CM3016-48 is fully protected, offering both overload current limiting and high temperature thermal shutdown. To reduce board cost and layout size, the CM3016 was designed to be stable with or without an output capacitor. This includes tiny, low ESR ceramic capacitors. The CM3016-48 is housed in a 5-pin SOT23 package and is ideal for space critical applications. It is available with optional lead-free finishing. Simplified Electrical Schematic Typical Application Circuit EN + IN GND OUT - BYP VREF Enable Control Thermal Overload Fast Power-Up Current Limit EN AMP Reverse Current Protection IN EN OUT GND 1µF 2.2µF OUT + + COUT CIN CM3016-48 100nF + CBYP BYP IN EN |
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