MIC5259 300mA High PSRR, Low Noise Cap CMOS LDO General Description Features The MIC5259 is an efficient CMOS voltage regulator Input voltage range: 2.7V to 6.0V optimized for low-noise applications. It offers 1.5% initial PSRR = 70dB 1kHz accuracy, low dropout voltage (300mV at 300mA) and low Low output noise: 30V(rms) ground current (typically 105A at light load). The Stability with ceramic output capacitors MIC5259 provides a very-low-noise output, ideal for RF applications where a clean voltage source is required. The Low-dropout: 300mV 300mA MIC5259 has a high PSRR even at low supply voltages, High-output accuracy: critical for battery operated electronics. A noise bypass pin 1.5% initial accuracy is also available for further reduction of output noise. 3.0% over temperature Designed specically for handheld and battery-powered Low quiescent current: 105A devices, the MIC5259 provides a TTL-logic-compatible Tight load and line regulation enable pin. When disabled, power consumption drops to nearly zero. TTL-Logic-controlled enable input The MIC5259 also works with low-ESR ceramic Zero off-mode current capacitors, reducing the amount of board space necessary Thermal shutdown and current limit protection for power applications critical issue in handheld wireless devices. Applications Key features include current limit, thermal shutdown, faster Cellular phones and pagers transient response, and an active clamp to speed up Cellular accessories device turn-off. The MIC5259 is available in the 6-pin Battery-powered equipment 2mm 2mm MLF package and the 5-pin Thin SOT-23 package in a wide range of output voltages. Laptop, notebook, and palmtop computers Data sheets and support documentation can be found on Consumer/personal electronics Micrels web site at www.micrel.com. Industrial portable electronics PC peripherals Typical Application MIC5259-x.xBD5/YD5 V V V IN OUT V IN OUT 15 MIC5259-x.xBML/YML C = 1.0F IN ENABLE Ceramic C = 1.0F 2 1 6 EN OUT SHUTDOWN C BYP C = 1.0F OUT (optional) 3 4 Enable 2 5 Ceramic Shutdown C = 1.0F EN 0.01F IN 3 4 EN (pin 3) may be C = 0.01F connected directly BYP to IN (pin 1). Ultra-Low Noise Regulator Application MLF and MicroLeadFrame are registered trademarks of Amkor Technology, Inc. Micrel Inc. 2180 Fortune Drive San Jose, CA 95131 USA tel +1 (408) 944-0800 fax + 1 (408) 474-1000 Micrel, Inc. MIC5259 (1) Ordering Information Part Number Marking Junction Voltage Temp. Range** Package Standard Pb-Free Standard Pb-Free* MIC5259-1.5BD5 MIC5259-1.5YD5 NY15 NY15 1.5V 40C to +125C 5-Pin Thin SOT23-5 MIC5259-1.8BD5 MIC5259-1.8YD5 NY18 NY18 1.8V 40C to +125C 5-Pin Thin SOT23-5 MIC5259-2.5BD5 MIC5259-2.5YD5 NY25 NY25 2.5V 40C to +125C 5-Pin Thin SOT23-5 MIC5259-2.8BD5 MIC5259-2.8YD5 NY28 NY28 2.8V 40C to +125C 5-Pin Thin SOT23-5 MIC5259-2.85BD5 MIC5259-2.85YD5 NY2J NY2J 2.85V 40C to +125C 5-Pin Thin SOT23-5 MIC5259-3.0BD5 MIC5259-3.0YD5 NY30 NY30 3.0V 40C to +125C 5-Pin Thin SOT23-5 MIC5259-3.3BD5 MIC5259-3.3YD5 NY33 NY33 3.3V 40C to +125C 5-Pin Thin SOT23-5 MIC5259-1.5YML Y15 1.5V 40C to +125C 6-Pin 2mm x 2mm MLF MIC5259-1.8YML Y18 1.8V 40C to +125C 6-Pin 2mm x 2mm MLF MIC5259-2.1YML Y21 2.1V 40C to +125C 6-Pin 2mm x 2mm MLF MIC5259-2.5BML MIC5259-2.5YML Y25 Y25 2.5V 40C to +125C 6-Pin 2mm x 2mm MLF MIC5259-2.8BML MIC5259-2.8YML Y28 Y28 2.8V 40C to +125C 6-Pin 2mm x 2mm MLF MIC5259-2.85BML MIC5259-2.85YML Y2J Y2J 2.85V 40C to +125C 6-Pin 2mm x 2mm MLF MIC5259-3.0BML MIC5259-3.0YML Y30 Y30 3.0V 40C to +125C 6-Pin 2mm x 2mm MLF MIC5259-3.3BML MIC5259-3.3YML Y33 Y33 3.3V 40C to +125C 6-Pin 2mm x 2mm MLF * Under bar / Over bar symbol ( / ) may not be to scale. ** Other voltages available, please contact Micrel Marketing for details. Pin Configuration EN GND IN 3 2 1 EN 1 6 BYP Yxx NYxx GND 2 5 NC NYxx Yxx 45 IN 3 4 OUT BYP OUT MIC5259-x.xBD5/YD5 MIC5259-x.xBML/YML 5-Pin Thin SOT-23 (D5) 6-Pin 2mm x 2mm MLF (ML) (Top View) (Top View) Pin Description Pin Number Pin Number Pin Name Pin Name TSOT-23-5 MLF -6 1 3 IN Supply Input 2 2 GND Ground 3 1 EN Enable/Shutdown (Input): CMOS compatible input. Logic high = enable logic low = shutdown. Do not leave open. Reference Bypass: Connect external 0.01F CBYP 1.0F 4 6 BYP capacitor to GND to reduce output noise. May be left open. 5 4 OUT Regulator Output 5 NC No Connect M9999-091406 September 2006 2