AME5110AEEV180Y

AME, Inc. AME5110 n General Description The AME5110 family of Fixed Frequency,High Efficiency, Synchronous Buck, DC-DC Converters, apply the latest innovations in Current-Mode Technology. Available in SOT25 package, these devices are typically twice as efficient as standard LDO’ s, making them well suited for most portable applications. The AME5110 is simple to use. As with standard LDO’ s,(1) Input, and (1) Output capacitor are required. The only other element is a small, low cost, 2.2µH inductor. The AME5110 is availabe with fixed output voltages of 1.5V and 1.8V, or adjustable at 600mA. Using a proprietary “ Extreme Green” Technology, battery life is maximized with Frequency Foldback at light Load, and 100% duty when Vin approaches Vout. 600mA / 1.2MHz PWM Buck DC-DC Converter n Typical Application Fixed Voltage Version VIN 2.2µH VIN SW VOUT CIN 4.7µ F CER AME5110 EN GND V OUT COUT 10µF CER n Features l High Efficiency “ Extreme Green” l 2.5V to 5.5V Input l Short Circuit Protection l Over-Temperature Shutdown l Under-Volatge Lockout l Superb Transient Response l All AME’ s Lead Free Products Meet RoHS Standards C IN 4.7µ F CER VIN VIN SW 22pF 2.2µH VOUT Adjustable Voltage Version AME5110 EN GND VFB R1 COUT 10µ F CER R2 n Applications l Cellular Phones l Digital Cameras l Portable Electronics l USB Devices l MP3 Players l LDO Replacement VOUT=VFB (R1+R2)/R2 Rev. A.03 1 AME, Inc. AME5110 n Function Diagram 600mA / 1.2MHz PWM Buck DC-DC Converter 4 AMP OUT-SENSE 5 ERROR AMP SLOPE COMP OSC 0.6V REF SYNC SWITCH COMP R LATCH S Q 3 VIN SW AMP 1 RUN Light-Load / Short-Circuit Frequency Foldback COMP 2 GND 2 Rev. A.03 AME, Inc. AME5110 n Pin Configuration SOT-25 Top View 5 4 600mA / 1.2MHz PWM Buck DC-DC Converter SOT-25 Top View AME5110AEEVxxx 1. EN 2. GND 5 4 AME5110BEEVADJ 1. EN 2. GND AME5110 3. SW 4. VIN 5. VOUT AME5110 3. SW 4. VIN 5. VFB 1 2 3 1 2 3 * Die Attach: Conductive Epoxy * Die Attach: Conductive Epoxy n Pin Description Pin Number Pin Name AME5110AEEVxxx AME5110BEEVADJ Enable Control Input. Forcing this pin above 1.5V enables the part. Forcing this pin below 0.3V shuts down the device. In shutdown, all functions are disabled drawing