AT1528 Global Mixed-mode Technology 1MHz, All-Ceramic, 2A PWM Buck DC/DC Converter General Description Features The AT1528 high-efficiency, DC/DC buck converter delivers up to 2A of output current. The device operates from an input voltage of 2.5V to 6V and provides an output voltage from 0.8V to VIN, making the AT1528 ideal for on-board post-regulation applications. Ceramic Input and Output Capacitors Efficiency Up to 94% Guaranteed 2A Output Current Operate from 2.5V to 6V Supply Adjustable Output from 0.8V to VIN Internal Soft-Start Short-Circuit and Thermal-Overload Protection Input Over Voltage Protection RoHS Compliant The AT1528 operate at a fixed frequency of 1MHz with an efficiency of up to 94%. The high operating frequency minimizes the size of external components. Internal soft-start control circuitry reduces inrush current. Short-circuit and thermal-overload protections improve design reliability. The AT1528 are available in a space-saving 8-pin SOP and MSOP package. Applications ASIC/DSP/µP/FPGA Core and I/O Voltages Set-Top Boxes Cellular Base Stations Networking and Telecommunications Ordering Information ORDER NUMBER MARKING TEMP. RANGE PACKAGE (Green) A1528 A1528 -40°C to +85°C -40°C to +85°C SOP-8 MSOP-8 AT1528P11U AT1528P81U Note: P1:SOP-8 P8: MSOP-8 1: Bonding Code U: Tape & Reel Pin Configuration Typical Application Circuit Input 2.5V to 6V AT1528 VCC REF 1 8 7 2 VIN 1 10µF 3 6 PGND FB 4 5 EN VIN LX 7 Output 0.8V to VIN , Up to 2A 2.2µH CFB * (option) 10Ω LX GND AT1528 8 VCC FB 4 R1 0.1µF 5 ON OFF PGND 6 SOP-8/MSOP-8 VOUT = 0.8V × (1+ REF EN R1 R2 22µF 2 R2 GND 3 0.1µF ) TEL: 886-3-5788833 http://www.gmt.com.tw Ver: 1.1 Dec 05, 2012 1 AT1529 Global Mixed-mode Technology 1MHz, All-Ceramic, 3.2A PWM Buck DC/DC Converter General Description Features The AT1529 high-efficiency, DC/DC buck converter delivers up to 3.2A of output current. The device operates from an input voltage of 2.5V to 6V and provides an output voltage from 0.8V to VIN, making the AT1529 ideal for on-board post-regulation applications. Ceramic Input and Output Capacitors Efficiency Up to 94% Operate from 2.5V to 6V supply Adjustable Output from 0.8V to VIN Internal Soft-Start Short-Circuit and Thermal-Overload Protection Input Over Voltage Protection RoHS Compliant The AT1529 operate at a fixed frequency of 1MHz with an efficiency of up to 94%. The high operating frequency minimizes the size of external components. Internal soft-start control circuitry reduces inrush current. Short-circuit and thermal-overload protections improve design reliability. Applications The AT1529 are available in a space-saving SOP-8 and TDFN3X3-8 package. ASIC/DSP/µP/FPGA Core and I/O Voltages Set-Top Boxes Cellular Base Stations Networking and Telecommunications Ordering Information ORDER NUMBER AT1529F11U AT1529RD1U Note: F1:SOP-8 (FD) RD: TDFN3X3-8 1: Bonding Code U: Tape & Reel MARKING TEMP. RANGE PACKAGE (Green) A1529 A1529 -40°C to +85°C -40°C to +85°C SOP-8 (FD) TDFN3X3-8 Pin Configuration Typical Application Circuit AT1529 AT1529 AT1529 VCC 1 8 VIN REF 2 7 LX GND 3 FB 4 Thermal Pad SOP-8 (FD) 6 PGND 5 EN VCC 1 REF 2 GND 3 FB 4 Thermal Pad 8 VIN 5V 8 VIN 7 LX 6 PGND 5 EN VIN LX 7 2.2µH CFB * (option) 10Ω 10µF 1 VCC FB 4 0.1µF 5 ON OFF EN PGND 6 REF GND 3 2 0.1µF R2 16k R1 50k VOUT 3.3V 22µF TDFN3X3-8 Note: Recommend connecting the Thermal Pad to the Ground for excellent power dissipation. VOUT = 0.8V × (1+ R1 ) R2 TEL: 886-3-5788833 http://www.gmt.com.tw Ver: 1.1 Dec 05, 2012 1