MIC37501/37502 5A, Low Voltage Cap LDO Regulator General Description Features The MIC37501 and MIC37502 are 5A, low dropout 5A minimum guaranteed output current linear voltage regulator that provide low voltage, high 500mV maximum dropout voltage current outputs with a minimum of external components. Ideal for 3.0V to 2.5V conversion They offer high precision, ultra-low dropout (500mV), Ideal for 2.5V to 1.8V, 1.65V, or 1.5V and low ground current. conversion The MIC37501and MIC37502 operate from an input of Stable with ceramic or tantalum capacitor 2.3V to 6.0V. They are designed to drive digital circuits Wide input voltage range: requiring low voltage at high currents (i.e., PLDs, DSPs, - V : 2.3V to 6.0V IN microcontrollers, etc.). They are available in fixed and 1.0% initial output tolerance adjustable output voltages. Fixed voltages include 1.5V, Fixed and adjustable output voltages: 1.65V, 1.8V, 2.5V, and 3.3V. The adjustable version is MIC375017 terminal fixed voltage capable of 1.24V to 5.5V. MIC375025 (TO-263) and 7 (SPAK) terminal MIC37501 and MIC37502 LDOs feature thermal and adjustable voltage currentlimit protection and reverse current protection. Excellent line and load regulation specifications Logic enable and error flag pins are available. Logic controlled shutdown Junction temperature range of the MIC37501/02 is from Thermal shutdown and current-limit protection 40C to 125C. Reverse-leakage protection For applications requiring input voltage greater than Low profile S-Pak and TO-263 packages 6.0V, see MIC3910x, MIC3915x, MIC3930x, and MIC3950x LDOs. Applications All support documentation can be found on Micrels web site at www.micrel.com. LDO linear regulator for low-voltage digital IC PC add-in cards High efficiency linear power supplies SMPS post regulator Battery charger Typical Applications MIC37501 V = 3.0V V = 2.5V IN OUT VIN VOUT Dropout C VIN VOUT 100k C IN OUT vs. Output Current 100F, Ceramic 450 VEN FLG 400 GND 350 300 2.5V OUT Fixed 2.5V Regulator with Error Flag 250 200 MIC37502 V 1.3V IN 150 VIN VOUT 100 VIN VOUT R1 C IN C 50 OUT VEN ADJ 100F, Ceramic 0 R2 GND 012345 OUTPUT CURRENT (A) Adjustable Regulator Super eta 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. MIC37501/37502 Ordering Information Part Number Output (2) Voltage Junction Temp. Range Package (1) Current Standard RoHS Compliant MIC37501-1.5BR MIC37501-1.5WR 5A 1.5V 40C to +125C S-Pak-7 MIC37501-1.65BR MIC37501-1.65WR 5A 1.65V 40C to +125C S-Pak-7 MIC37501-1.8BR MIC37501-1.8WR 5A 1.8V 40C to +125C S-Pak-7 MIC37501-2.5BR MIC37501-2.5WR 5A 2.5V 40C to +125C S-Pak-7 MIC37501-3.3BR MIC37501-3.3WR 5A 3.3V 40C to +125C S-Pak-7 MIC37502BR MIC37502WR 5A Adj. 40C to +125C S-Pak-7 MIC37502BU MIC37502WU 5A Adj. 40C to +125C To-263-5 Notes: 1. RoHS compliant with high-melting solder exemption. 2. Other Voltage available. Contact Micrel for detail. Pin Configuration 7 FLG/ADJ 5 ADJ 6 VOUT 4 VOUT 5 VOUT 4 GND 3 GND 3 VIN 2 VIN 2 VIN 1EN 1EN TO-263-5 S-PAK-7 Pin Description Pin Number Pin Number Pin Name Pin Name TO-263-5 S-PAK-7 1 1 EN Enable (input): CMOS-compatible input. Logic high = enable, logic low = shutdown. 2 2, 3 VIN Input voltage which supplies current to the output power device. Connect pins 2 and 3 together externally. 3 4 GND Ground (TAB is connected to ground). 4 5, 6 VOUT Regulator Output: Connect pins 5 and 6 together externally. Error Flag (output): Open collector output. Active low indicates an 7 FLG output fault condition. 5 7 ADJ Adjustable regulator feedback input. Connect to resistor voltage divider. 2 M9999-050511-B May 2011 TAB TAB