AS13985 micropower 150ma low-noise ldo www.austriamicrosystems.co m revision 1.03 1 - 2 austria micro systems product brief 1 general description the AS13985 is a high-performance low-dropout 150ma voltage regulator designed for use with very-low esr out- put capacitors. the device can deliver superior perfor- mance in all specifications critical to battery-powered designs, and is perfectly suited for mobile phones, pdas, mp3 players, and other battery powered devices. stability is guaranteed with a ceramic output capacitor of from 1 to 22f. the low equivalent series resistance (5 ? ) of these capacitors ensures low output impedance at high fre- quencies. automatic sleep mode requires less than 1a quiescent current when pin en is pulled low. regulation performance is excellent even under low drop- out conditions, when the power tr ansistor has to operate in linear mode. a 10nf bypass capacitor can be added to reduce output noise to 30v. the low-noise performance allows direct connection of noise sensitive ci rcuits without additional fil- tering networks. multiple output voltage options are available as standard products. contact austriamic rosystems, ag for details. the AS13985 is available in a 5-bump wlp package and a 5-pin sot23 package. figure 1. block diagram 2 key features ultra-low dropout voltage: (typically 45mv @ 150ma, 0.3mv @ 1ma) supply range: 2.5 to 5.5v output voltage range: 1.2 to 5.0v (in 25mv steps) output current: 150ma (guaranteed) stable with low-esr output capacitor integrated over-temperature /over-current protection low gnd pin current (only 95a) output voltage accuracy: 1% minimal external components required high peak-current capability low shutdown current: 1a operating temperature junction range: -40 to +125c smallest available packages: - 5-bump wlp -5-pin sot23 3 applications the AS13985 is ideal for powering cordless and mobile phones, mp3 players, cd and dvd players, pdas, hand- held computers, digital cameras, and any other hand-held battery-powered device. v ref AS13985 over-current/ over-temperature protection + ? 3 en 1 v in 5 v out 4 bypass 2 gnd
www.austriamicrosystems.co m revision 1.03 2 - 2 AS13985 austria micro systems product brief copyrights copyright ? 1997-200 6, austriamicrosystems ag, schloss premstaett en, 8141 unterpremstae tten, austria-europe. trademarks registered ?. all rights reserved. the materi al herein may not be reprodu ced, adapted, merged, trans- lated, stored, or used witho ut the prior written consent of the copyright owner. all products and companies mentioned are trademarks or registered trademarks of their respective companies. disclaimer devices sold by austriamicrosystems ag are covered by t he warranty and patent indemni fication provisions appearing in its term of sale. austriamicrosystems ag makes no warranty, express, statutory, implied, or by description regarding the information set forth herein or regarding the freedom of the described devices from pa tent infringement. austriami- crosystems ag reserves the right to chang e specifications and prices at any ti me and without notice . therefore, prior to designing this product into a system, it is necessary to check with austriamicrosystems ag for current information. this product is intended for use in normal commercial a pplications. applications requiring extended temperature range, unusual environmental requirements, or high reliability app lications, such as military, medical life-support or life- sustaining equipment are specifically not recommended wit hout additional processing by austriamicrosystems ag for each application. for shipments of less than 100 parts the m anufacturing flow might show deviations from the standard production flow, such as test flow or test location. the information furnished here by austriamicrosystems ag is believed to be correct and accurate. however, austriamicrosystems ag shall not be liable to recipient or any third party for any damages, including but not limited to personal injury, property damage, loss of profits, loss of use, interruption of business or indirect, special, incidental or consequential damages, of any kind, in connection with or ar ising out of the furnishing, performance or use of the tech- nical data herein. no obligation or liability to recipient or any third party shall arise or flow out of austriamicrosystems ag rendering of technical or other services. contact information headquarters austriamicrosystems ag a-8141 schloss premstaetten, austria tel: +43 (0) 3136 500 0 fax: +43 (0) 3136 525 01 e-mail: info@austriamicrosystems.com for sales offices, distributors a nd representatives, please visit: http://www.austriamicrosystems.com austria micro systems ? a leap ahead
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