AP6015 Evaluation Module High-Efficiency Step-Down DC-DC Converter Features Description • The AP6015 is the first device in a family of low-noise current mode synchronous step-down DC-DC converters. It is ideally suited for systems powered by either a 1-cell Li-ion battery or a 2- to 3-cell NiCd/ NiMH/ Alkaline battery. The AP6015 is a synchronous PWM converter with integrated N- and P-channel power MOSFET switches. Compared to the asynchronous topology, synchronous rectification offers the benefits of higher efficiency and reduced component count. The high operating frequency of 1MHz allows small inductor and capacitor to be used. This results in small pcb area. During shut-down, the standby current drops to 1µA or less. The AP6015 is available in the 10-pin MSOP package. It operates over a free-air temperature range of -40°C to 85°C. • • • • • • • • • • • High-efficiency (>94%) synchronous step-down converter Current Mode Operation for faster transient response and better loop stabilization 2.5V to 5.5V operating input voltage range Adjustable output voltage range from 0.8V to VIN Fixed output voltage options: 1.8V, 2.5V and 3.3V Up to 800mA output current High efficiency over a wide range of load currents PWM operation mode Internal soft-start function Typical quiescent current of 150µA MSOP-10L: Available in “Green” Molding Compound (No Br, Sb) Lead Free Finish/ RoHS Compliant EVM Features • • • Input voltage : 3V to 5.5V Output voltage : 2.5V and up (adjustable) Output current : up to 0.8A Ordering Information Device Package Code Packaging EVM Part Number AP6015-xxM10G M10 MSOP-10L AP6015-EVM AP6015-EVM Rev. 0.1 1 of 5 www.diodes.com MARCH 2009 © Diodes Incorporated AP6015 Evaluation Module High-Efficiency Step-Down DC-DC Converter Schematic AP6015-EVM Rev. 0.1 2 of 5 www.diodes.com MARCH 2009 © Diodes Incorporated AP6015 Evaluation Module High-Efficiency Step-Down DC-DC Converter PCB Layout Top Layer Layout of AP6015-EVM Bottom Layer Layout of AP6015-EVM AP6015-EVM Rev. 0.1 3 of 5 www.diodes.com MARCH 2009 © Diodes Incorporated AP6015 Evaluation Module High-Efficiency Step-Down DC-DC Converter Bill of Material Bill of Material for AP6015 EVM Ref C1 C2, C3 C4 C5 C6 R1 R2 R3 R4 R5 R6 L1 U1 Count Size 1 0805 2 1210 1 0805 1 0805 1 0805 1 0805 1 0805 1 1 0805 1 0805 1 0805 1 8x10mm 1 SOP8 Mfr STD STD STD STD STD STD STD STD STD STD STD Part Number STD STD STD STD STD STD STD STD STD STD STD Description Not soldered 10 µF ceramic capacitor 1 µF ceramic capacitor Not soldered 100 pF ceramic capacitor 100 Ω resistor 680 kΩ resistor 200 kΩ potentiometer 0 Ω resistor (jumper) 39 kΩ resistor 82 kΩ resistor 3.3 µH inductor AP1212xSG Dual-channel USB power switch Diodes I/O Terminals and Test Points Terminals and Jumpers for AP6015 EVM I/O and Test Points Description Comments Input and Ground Connect to input power supply Output and Ground Connect to load J5 (LX) LX pin Test point for LX pin of AP6015 J6 (PG) PG pin J1 (VCC), J3 (GND) J2 (OUT), J4 (GND) JP1 AP6015-EVM Rev. 0.1 Test point for PG pin of AP6015 Place a jumper to get filtered control supply from Control power supply jumper input voltage source 4 of 5 www.diodes.com MARCH 2009 © Diodes Incorporated AP6015 Evaluation Module High-Efficiency Step-Down DC-DC Converter Quick Start Guide 1. Connect a +5V power supply between the VIN and GND terminals. Make sure the power supply is turned off. 2. Connect an adjustable current or resistive load to the OUT and GND terminals (up to 0.8A). 3. Turn on the power supply. Adjust potentiometer R3 until Vout=2.5V. 4. Increase the load current and monitor the output voltage. 5. Vary the input voltage between 3.0V and 5.0V and monitor the output voltage. AP6015-EVM Rev. 0.1 5 of 5 www.diodes.com MARCH 2009 © Diodes Incorporated