PRODUCT SUMMARY SKY87201-11: Low Noise, Fast Transient 600 mA Step-Down Converter with Output Auto Discharge Applications Description The SKY87201-11 is a 2 MHz step-down converter with an input Cellular phones voltage range of 2.7 V to 5.5 V and output voltage as low as 0.6 V. Digital cameras It is optimized to react quickly to a load variation. The SKY87201- Handheld instruments 11 incorporates a unique low-noise architecture that reduces ripple and spectral noise. Microprocessor, DSP Core, I/O power The SKY87201-11 is programmable with external feedback PDAs and handheld computers resistors. It can deliver 600 mA of load current while maintaining USB devices a low 37 A no-load quiescent current. The 2 MHz switching frequency minimizes the size of external components while keeping switching losses low. Features The SKY87201-11 is designed to maintain high efficiency Output auto discharge when disabled throughout the operating range, which is critical for portable VIN range: 2.7 V to 5.5 V applications. Low-noise, light-load mode The device has an output auto discharge feature. This enables the device to quickly discharge the output when the device is disabled Low ripple power management mode (VEN = VIN to 0 V). Output voltage adjustable from 0.6 V to VIN The SKY87201-11 is provided in a small, 8-pin, 2 x 2 mm Thin No load quiescent current: 37 A Dual Flat No-Lead (STDFN) package. A functional block diagram is Up to 98% efficiency shown in Figure 1. Maximum output current: 600 mA Switching Frequency: 2 MHz Soft start: 150 s Fast load transient Over-temperature protection Current limit protection 100% duty cycle low-dropout operation Shutdown current: <1 A Available in an STDFN (8-pin, 2 x 2 mm) package (MSL1, 260 C per JEDEC J-STD-020) Skyworks Solutions, Inc. Phone 781 376-3000 Fax 781 376-3100 sales skyworksinc.com www.skyworksinc.com 202528B Skyworks Proprietary Information Products and Product Information Are Subject To Change Without Notice December 11, 2012 1 PRODUCT SUMMARY SKY87201-11 LOW-NOISE STEP-DOWN CONVERTER Figure 1. SKY87201-11 Block Diagram Ordering Information Model Name Manufacturing Part Number Evaluation Board Part Number SKY87201-11 Low-Noise, Step-Down Converter with SKY87201-11 SKY87201-11-EVB Output Auto Discharge Copyright 2012 Skyworks Solutions, Inc. All Rights Reserved. Information in this document is provided in connection with Skyworks Solutions, Inc. (Skyworks) products or services. These materials, including the information contained herein, are provided by Skyworks as a service to its customers and may be used for informational purposes only by the customer. Skyworks assumes no responsibility for errors or omissions in these materials or the information contained herein. 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Skyworks assumes no liability for applications assistance, customer product design, or damage to any equipment resulting from the use of Skyworks products outside of stated published specifications or parameters. Skyworks, the Skyworks symbol, and Breakthrough Simplicity are trademarks or registered trademarks of Skyworks Solutions, Inc., in the United States and other countries. Third-party brands and names are for identification purposes only, and are the property of their respective owners. Additional information, including relevant terms and conditions, posted at www.skyworksinc.com, are incorporated by reference. Skyworks Solutions, Inc. Phone 781 376-3000 Fax 781 376-3100 sales skyworksinc.com www.skyworksinc.com 2 December 11, 2012 Skyworks Proprietary Information Products and Product Information Are Subject To Change Without Notice 202528B