AP1513 PWM CONTROL 2A STEP-DOWN CONVERTER General Description Features Input voltage: 3.6V to 18V AP1513 consists of step-down switching regulator with PWM control. These devices include a reference voltage source, Output voltage: 0.8V to V CC oscillation circuit, error amplifier, and internal PMOS. Duty ratio: 0% to 100% PWM control Oscillation frequency: 300KHz typ. AP1513 provides low-ripple power, high efficiency, and excellent Soft-start, Current limit, Enable function transient characteristics. The PWM control circuit is able to vary Thermal Shutdown function the duty ratio linearly from 0 up to 100%. This converter also Built-in internal SW P-channel MOS contains an error amplifier circuit as well as a soft-start circuit that SOP-8L: Available in Green Molding Compound prevents overshoot at startup. An enable function, an over (No Br, Sb) current protect function and a short circuit protect function are built Lead Free Finish/ RoHS Compliant (Note 1) inside, and when OCP or SCP happens, the operation frequency will be reduced from 300KHz to 30KHz. Also, an internal compensation block is built in to minimum external component count. With the addition of an internal P-channel Power MOS, a coil, capacitors, and a diode connected externally, these ICs can function as step-down switching regulators. They serve as ideal power supply units for portable devices when coupled with the SOP8L mini-package, providing such outstanding features as low current consumption. Since this converter can accommodate an input voltage up to 18V, it is also suitable for the operation via an AC adapter. Applications PC Motherboard LCD Monitor Graphic Card DVD-Video Player Telecom Equipment ADSL Modem Printer and other Peripheral Equipment Microprocessor core supply Networking power supply Typical Application Circuit V = 5V/2A L1 OUT V Vcc Output IN 33uH R A R C C OCSET OCSET AP1513 C 6.8K 3K Option Optional + + FB C OCSET C C IN OUT 0.1uF 470uF 470uF V EN - - SS R EN CVcc R B D1 100K 1.3K SBR2U30P1 0.1uF C EN 0.1uF Note: V = V x (1+R /R ) OUT FB A B R =0.7K~5K ohm B V =12V, I =2A IN MAX V 2.5V 3.3V 5V OUT L1 Value 22uH 27uH 33uH AP1513 Rev. 4 1 of 9 JULY 2009 DS31053 www.diodes.com Diodes Incorporated AP1513 PWM CONTROL 2A STEP-DOWN CONVERTER Ordering Information AP1513 S X - 13 Package Packing Lead Free S : SOP-8L 13 : Tape & Reel L : Lead Free G : Green Package Packaging 13 Tape and Reel Device Code (Note 2) Quantity Part Number Suffix AP1513SL-13 S SOP-8L 2500/Tape & Reel -13 Lead-free AP1513SG-13 S SOP-8L 2500/Tape & Reel -13 Notes: 1. EU Directive 2002/95/EC (RoHS). All applicable RoHS exemptions applied. Please visit our website at