AP65101WU-7 Diodes Incorporated

NOT RECOMMENDED FOR NEW DESIGN AP65101 TSOT26 LIGHT LOAD IMPROVED 1.5A SYNCH DC/DC BUCK CONVERTER Description Pin Assignments The AP65101 is a 500kHz switching frequency internal compensated synchronous DC-DC buck converter. It has integrated low R DS(ON) Top View high and low side MOSFETs. FB The AP65101 enables continuous load current of up to 1.5A with IN 1 6 efficiency as high as 97%. 2 EN GND 5 The AP65101 implements an automatic custom light-load efficiency improvement algorithm. BST SW 3 4 The AP65101 features current mode control operation, which enables fast transient response times and easy loop stabilization. TSOT26 The AP65101 simplifies board layout and reduces space requirements with its high level of integration and minimal need for external components, making it ideal for distributed power Applications architectures. Gaming Consoles The AP65101 is available in a standard Green TSOT26 package and Flat Screen TV Sets and Monitors is RoHS compliant. Set-Top Boxes Distributed Power Systems Home Audio Features Consumer Electronics Network Systems V 4.5V to 16V IN FPGA, DSP and ASIC Supplies 1.5A Continuous Output Current, 2.5A Peak Green Electronics Efficiency Up to 97% Automated Light Load Improvement V Adjustable From 0.8V OUT 500kHz Switching Frequency Internal Soft-Start Enable Pin Overcurrent Protection (OCP) with Hiccup Thermal Protection Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2) Halogen and Antimony Free. Green Device (Note 3) Notes: 1. No purposely added lead. Fully EU Directive 2002/95/EC (RoHS) & 2011/65/EU (RoHS 2) compliant. 2. See NOT RECOMMENDED FOR NEW DESIGN AP65101 Pin Descriptions Pin Pin Number Function Name Power Input. IN supplies the power to the IC, as well as the step-down converter switches. Drive IN with a 4.5V IN 1 to 16V power source. Bypass IN to GND with a suitably large capacitor to eliminate noise on the input to the IC. See Input Capacitor. GND 2 Ground Power Switching Output. SW is the switching node that supplies power to the output. Connect the output LC SW 3 filter from SW to the output load. Note that a capacitor is required from SW to BS to power the high-side switch. High-Side Gate Drive Boost Input. BS supplies the drive for the high-side N-Channel MOSFET a 0.01F or BST 4 greater capacitor from SW to BS to power the high side switch. Enable Input. EN is a digital input that turns the regulator on or off. Drive EN high to turn on the regulator low to EN 5 turn it off. Attach to IN with a 100k pull up resistor for automatic startup. Feedback Input. FB senses the output voltage and regulates it. Drive FB with a resistive voltage divider FB 6 connected to it from the output voltage. The feedback threshold is 0.8V. See Setting the Output Voltage. Functional Block Diagram 0.3V INTERNAL EN 5 0.8V REFERENCE 1.1V Vcc REGULATOR + IN 1 OVP CURRENT RAMP SENSE - AMPLIFIER 1.1V OSCILLATOR E + 66 FB 500KHz CLK BST 4 - Logic 0.3 V + - SW 3 Internal - + SS CURRENT COMPARATOR + 0.8 V GND 2 2 of 14 AP65101 December 2016 Diodes Incorporated www.diodes.com Document number: DS38098 Rev. 2 - 3 ADVANCED INFORMATION - +