MIC5254 Dual 150mA Cap LDO with Error Flag Outputs General Description Features The MIC5254 is an efficient, precise, dual CMOS voltage Input voltage range: 2.7V to 6.0V regulator. It offers better than 1% initial accuracy, Dual, independent 150mA LDOs extremely low dropout voltage (typically 135mV at 150mA) Error flags indicate fault condition and low ground current (typically 90A) over load. The Stable with ceramic output capacitor MIC5254 features two independent LDOs with error flags that indicate an output fault condition such as overcurrent, Ultra-low dropout: 135mV 150mA thermal shut-down and dropout. High output accuracy: 1.0% initial accuracy 2.0% over Designed specifically for handheld and battery-powered temperature devices, the MIC5254 provides a TTL-logic-compatible Low quiescent current: 90A each LDO enable pin. When disabled, power consumption drops Tight load and line regulation nearly to zero. Thermal shutdown and current limit protection The MIC5254 also works with low-ESR ceramic Zero off-mode current capacitors, reducing the amount of board space necessary TTL logic-controlled enable input for power applications, critical in handheld wireless devices. 10-pin MSOP package Key features include current limit, thermal shutdown, faster transient response, and an active clamp to speed up Applications device turnoff. The MIC5254 is available in the 10-pin MSOP package and is rated over a 40C to +125C Cellular phones and pagers junction temperature range. Cellular accessories Data sheets and support documentation can be found on Battery-powered equipment Micrels web site at www.micrel.com. Laptop, notebook, and palmtop computers Consumer/personal electronics Typical Application MIC5254 V V INA OUTA 9 10 VINA OUTA 1F 2 1 1F FLGA ENA FLGA Ceramic V OUTB 3 8 GNDA OUTB V INB 6 4 VINA FLGB 1F FLGB Ceramic 5 7 1F ENB GNDB Dual Output LDO with Error Flag Micrel Inc. 2180 Fortune Drive San Jose, CA 95131 USA tel +1 (408) 944-0800 fax + 1 (408) 474-1000 Micrel, Inc. MIC5254 Ordering Information Part Number VOUTA VOUTB Temperature Range Package Lead Finish MIC5254-SJBMM 3.3V 2.5V 40 to +125C 10-Pin MSOP Standard MIC5254-SJYMM 3.3V 2.5V 40 to +125C 10-Pin MSOP Pb-Free Note: Other voltages available. Contact Micrel Marketing for details. Pin Configuration 10-Pin MSOP (MM) Pin Description Pin Number Pin Name Channel Pin Name 1 FLGA A Error Flag (Output): Open-drain output. Active low indicates an output undervoltage condition. 2 ENA A Enable/Shutdown (Input): CMOS compatible input. Logic high = enable logic low = shutdown. Do not leave open. 3 GNDA A Ground 9 INA A Supply Input 10 OUTA A Regulator Output 4 FLGB B Error Flag (Output): Open-drain output. Active low indicates an output undervoltage condition. 5 ENB B Enable/Shutdown (Input): CMOS compatible input. Logic high = enable logic low = shutdown. Do not leave open. 7 GNDB B Ground 6 INB B Supply Input 8 OUTB B Regulator Output M9999-121107 December 2007 2