MIC5159YM6 TR Microchip

MIC5159 Programmable Current Limit Cap LDO Regulator Controller General Description Features Micrels MIC5159 is a precision-voltage regulator Fast transient response controller. Used with an external P-Channel MOSFET, the Input voltage range: V 1.65V to 5.5V IN MIC5159 forms a two-chip low-dropout regulator capable 1.0% initial output tolerance of driving a wide range of output currents. Fixed 1.8V or adjustable output voltage down to 1.25V The MIC5159 operates from an input of 1.65V to 5.5V. The Stable with ceramic output capacitor low input voltage allows the MIC5159 to operate off of high power 1.8V rails to generate lower voltages such as 1.5V. Capable up to 10A Features of the MIC5159 include enable input and current- Excellent line and load regulation specifications limit protection. As a Cap design, the MIC5159 is stable Logic-controlled shutdown with ceramic output capacitors. Programmable current limit The MIC5159 is packaged in the IttyBitty SOT-23-6, and Current-limit protection is offered in fixed and adjustable output voltages. Junction IttyBitty SOT-23-6 package temperature range of the MIC5159 is from 40C to Available temperature range:40C to +125C +125C. Applications Ultra-high current, ultra-low dropout voltage regulator High-efficiency linear power supplies Low-voltage distributed power Fixed telecom Multimedia and PC power supplies Battery chargers Low-voltage DSP, microprocessor and microcontroller power supplies Typical Application Q1Q4 SUB15P0152 4 V IN V OUT U1 MIC5159BM6/YM6 R1 5 10A C1 EN GATE C1 C1 1 IN FB 3 IS GND 100mA R2 V = 3.3V IN V = 2.5V GND GND OUT C = 200F OUT Adjustable Output Voltage IttyBitty is a registered trademark of Micrel, Inc. Micrel Inc. 2180 Fortune Drive San Jose, CA 95131 USA tel +1 (408) 944-0800 fax + 1 (408) 474-1000 Micrel, Inc. MIC5159 Ordering Information Junction Part Number Marking Voltage* Package Temp. Range Standard Pb-Free MIC5159BM6 MIC5159YM6 LZAA Adj. 40 to +125C SOT-23-6 MIC5159-1.8BM6 MIC5159-1.8YM6 LZ18 1.8V. 40 to +125C SOT-23-6 MIC5159-3.0BM6 MIC5159-3.0YM6 LZ30 3.0V 40 to +125C SOT-23-6 Note: Other Voltage available. Contact Micrel for details. Pin Configuration ADJ EN GATE OUT EN GATE 6 5 4 6 5 4 Pin 1 Pin 1 LZAA LZxx Index Index 132 132 IN GND IS IN GND IS SOT-23-6 (M6) SOT-23-6 (M6) Adjustable Voltage Version Fixed Voltage Version Pin Description Pin Number Pin Name Pin Function 1 IN Input Voltage. 2 GND Ground. 3 IS Current Sense: IS must be tied to VIN pin if the current limit feature is not used. 4 GATE Gate drive of the external P-Channel MOSFET. 5 EN Enable Input: Logic Level ON/OFF control. Logic high = ON logic low = OFF. ADJ Adjustable Regulator Feedback Input: Connect to resistor voltage divider. 6 OUT Output Voltage: Connect to drain of P-Channel MOSFET to regulate output to proper voltage. M9999-062706 June 2006 2