AP65200S-13 Diodes Incorporated

PART OBSOLETE AP65200 NO ALTERNATE PART LIGHT LOAD IMPROVED 2A SYNCH DC/DC BUCK CONVERTER Description Pin Assignments The AP65200 is a 340kHz switching frequency external compensated ( Top View ) ( Top View ) synchronous DC/DC buck converter. It has integrated low R DS(ON) high and low side MOSFETs. BST 1 8 BST 1 8 SS SS The AP65200 enables continues load current of up to 2A with EN 2 7 EN IN 2 7 IN efficiency as high as 95%. 3 6 COMP SW 3 6 COMP SW The AP65200 implements an automatic custom light load efficiency improvement algorithm. GND 4 5 FB GND 4 5 FB The AP65200 features current mode control operation, which enables SO-8EP SO-8 fast transient response times and easy loop stabilization. ( Top View ) ( Top View ) The AP65200 simplifies board layout and reduces space 1 10 SS AGND BST 1 8 SS 2 9 requirements with its high level of integration and minimal need for BST EN IN 2 7 EN 3 8 IN COMP external components, making it ideal for distributed power SW 3 6 COMP 4 7 FB SW architectures. GND 4 5 FB GND 5 6 GND The AP65200 is available in a standard Green SO-8, MSOP-8EP, MSOP-8EP U-DFN2626-10 U-DFN2626-10 and SO-8EP package and is RoHS compliant. Features Applications V 4.7V to 18V IN Gaming Consoles 2A Continuous Output Current, 3A Peak Flat Screen TV Sets and Monitors Efficiency Up to 95% Set Top Boxes Automated Light Load Improvement Distributed Power Systems V Adjustable to 0.925V to 16V OUT Home Audio 340kHz Switching Frequency Consumer Electronics External Programmable Soft-Start Network Systems Enable Pin FPGA, DSP and ASIC Supplies OCP and Thermal Protection Green Electronics 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 PART OBSOLETE AP65200 NO ALTERNATE PART Pin Descriptions Pin Number Pin SO-8 Function Name SO-8EP U-DFN2626-10 MSOP-8EP High-Side Gate Drive Boost Input. BST supplies the drive for the high-side N-Channel MOSFET a BST 1 2 0.01F or greater capacitor from SW to BST to power the high side switch. Power Input. IN supplies the power to the IC, as well as the step-down converter switches. Drive IN 2 3 IN with a 4.7V to 18V power source. Bypass IN to GND with a suitably large capacitor to eliminate noise on the input to the IC. See Input Capacitor. Power Switching Output. SW is the switching node that supplies power to the output. Connect the SW 3 4 output LC filter from SW to the output load. Note that a capacitor is required from SW to BST to power the high-side switch. GND 4 5. 6 Ground Feedback Input. FB senses the output voltage and regulates it. Drive FB with a resistive voltage FB 5 7 divider connected to it from the output voltage. The feedback threshold is 0.925V. See Setting the Output Voltage. Compensation Node. COMP is used to compensate the regulation control loop. Connect a series COMP 6 8 RC network from COMP to GND. In some cases, an additional capacitor from COMP to GND is required. See Compensation Components. Enable Input. EN is a digital input that turns the regulator on or off. Drive EN high to turn on the regulator low to turn it off. EN 7 9 Attach EN to IN with a 100k pull up resistor for automatic startup. With this configuration an internal voltage clamp ensures that a safe voltage is set for Enable not to exceed the absolute maximum voltage for this pin. Soft-Start Control Input. SS controls the soft-start period. Connect a capacitor from SS to GND to SS 8 10 set the soft-start period. A 0.1F capacitor sets the soft-start period to 15ms. To disable the soft- start feature, leave SS floating. AGND NA 1 Analog GND PAD - - Exposed PAD for thermal performance improvement connect to GND (Note 4) Note: 4. PADs soldering area needs to be at least 80%. Functional Block Diagram + 2 IN OVP CURRENT RAMP SENSE - AMPLIFIER 1.1V OSCILLATOR E 5 + FB 100/340 KHz CLK BS 1 - Logic 0.3 V 100m + - 3 SW SS - 8 + CURRENT 100m COMPARATOR + ERROR 6uA 0.923 V AMPLIFIER 4 GND COMP 6 + 2.5V EN OK disable LOCKOUT IN < 4.10V - COMPARATOR IN EN 7 + INTERNAL 5V REGULATORS SHUTDOWN - COMPARATOR 0.9V 2 of 18 AP65200 February 2018 Diodes Incorporated www.diodes.com Document number: DS35548 Rev. 9 - 4 OBSOLETE PANRETW DPIRSOCDOUNCTTIN UED - +