MIC49150 1.5A Low Voltage LDO Regulator w/Dual Input Voltages General Description Features The MIC49150 is a high-bandwidth, low-dropout, 1.5A volt- Input Voltage Range: age regulator ideal for powering core voltages of low- V : 1.4V to 6.5V IN power microprocessors. The MIC49150 implements a dual V : 3.0V to 6.5V BIAS supply conguration allowing for very low output Stable with 1F ceramic capacitor impedance and very fast transient response. 1% initial tolerance The MIC49150 requires a bias input supply and a main Maximum dropout voltage (V V ) of 500mV input supply, allowing for ultra-low input voltages on the IN OUT over temperature main supply rail. The input supply operates from 1.4V to 6.5V and the bias supply requires between 3V and 6.5V Adjustable output voltage down to 0.9V for proper operation. The MIC49150 offers xed output Ultra fast transient response (Up to 10MHz bandwidth) voltages from 0.9V to 1.8V and adjustable output voltages Excellent line and load regulation specications down to 0.9V. Logic controlled shutdown option The MIC49150 requires a minimum of output capacitance Thermal shutdown and current limit protection for stability, working optimally with small ceramic capacitors. Power MSOP-8 and S-Pak packages The MIC49150 is available in an 8-pin power MSOP pack- Junction temperature range: 40C to 125C age and a 5-pin S-Pak. Its operating temperature range is 40C to +125C. Applications Data sheets and support documentation can be found on Graphics processors Micrels web site at www.micrel.com. PC add-in cards Microprocessor core voltage supply Low voltage digital ICs High efficiency linear power supplies SMPS post regulators Typical Application MIC49150BR V = 1.8V V = 1.0V IN OUT IN OUT R1 V = 3.3V BIAS BIAS ADJ C = 1F R2 OUT C = 1F Ceramic BIAS GND Ceramic C = 1F IN Ceramic Low Voltage, Fast Transient Response Regulator Micrel Inc. 2180 Fortune Drive San Jose, CA 95131 USA tel +1 (408) 944-0800 fax + 1 (408) 474-1000 Micrel, Inc. MIC49150 Ordering Information Part Number Output Junction Voltage Package Pb-Free / Standard Current Temp. Range RoHS Compliant MIC49150-0.9BMM MIC49150-0.9YMM 1.5A 0.9V 40 to +125C 8-Pin Power MSOP MIC49150-1.2BMM MIC49150-1.2YMM 1.5A 1.2V 40 to +125C 8-Pin Power MSOP MIC49150-1.5BMM MIC49150-1.5YMM 1.5A 1.5V 40 to +125C 8-Pin Power MSOP MIC49150-1.8BMM MIC49150-1.8YMM 1.5A 1.8V 40 to +125C 8-Pin Power MSOP MIC49150BMM MIC49150YMM 1.5A Adj. 40 to +125C 8-Pin Power MSOP MIC49150-0.9BR MIC49150-0.9WR* 1.5A 0.9V 40 to +125C 5-Pin S-PAK MIC49150-1.2BR MIC49150-1.2WR* 1.5A 1.2V 40 to +125C 5-Pin S-PAK MIC49150-1.5BR MIC49150-1.5WR* 1.5A 1.5V 40 to +125C 5-Pin S-PAK MIC49150-1.8BR MIC49150-1.8WR* 1.5A 1.8V 40 to +125C 5-Pin S-PAK MIC49150BR MIC49150WR* 1.5A Adj. 40 to +125C 5-Pin S-PAK * RoHS Compliant with high-melting solder exemption. Pin Configuration GND 1 8 EN/ADJ. 5 VOUT 4 VIN VBIAS GND 2 7 3 GND 2 VBIAS GND VIN 3 6 1 EN/ADJ. GND VOUT 4 5 8-Pin Power MSPO (MM) 5-Pin S-Pak (R) Pin Description Pin Number Pin Number Pin Name Pin Name 8-MSOP 5-SPak 1 1 EN Enable (Input): CMOS compatible input. Logic high = enable, logic low = shutdown. ADJ Adjustable regulator feedback input. Connect to resistor voltage divider. 2 2 VBIAS Input Bias Voltage for powering all circuitry on the regulator with the exception of the output power device. 3 4 VIN Input voltage which supplies current to the output power device. 4 5 OUT Regulator Output. 5/6/7/8 3 GND Ground (TAB is connected to ground on S-Pak). M9999-111306 November 2006 2 TAB