NOT RECOMMENDED FOR NEW DESIGN CONTACT US AP1507 150kHz, 3A PWM BUCK DC/DC CONVERTER Description Pin Assignments The AP1507 is a monolithic IC designed for a step-down DC/DC (Top View) converter and is capable of driving a 3A load without an external transistor. Due to reducing the number of external components, the 5 SD board space can be saved easily. 4 FB 3 GND The external shutdown function can be controlled by logic level and 2 Output then go into standby mode. The internal compensation makes the 1 V IN feedback control have good line and load regulation without an Metal Tab GND external design. Regarding the protected function, the thermal TO252-5 shutdown prevents overtemperature operation from damaging the device, and current limit protects against overcurrent operation of the output switch. If the current limit function occurs, and V is down to FB 0.5V below, the switching frequency reduces. The AP1507 series operates at a switching frequency of 150kHz, which allows smaller-sized filter components than the requirements with lower frequency switching regulators. Other features include a guaranteed 4% tolerance on output voltage under specified input voltage and output load conditions and 15% on the oscillator frequency. The output version included a fixed 3.3V, 5V, 12V, and an adjustable type. AP1507 is available in a 5-lead TO252-5 green package. Applications Simple High-Efficiency Step-Down Regulator Features On-Card Switching Regulators Output Voltage: 3.3V, 5V, 12V and Adjustable Output Version Positive to Negative Converter Adjustable Version Output Voltage Range, 1.23V to 18V 4% 150kHz 15% Fixed Switching Frequency Voltage Mode Non-Synchronous PWM Control Thermal-Shutdown and Current-Limit Protection ON/OFF Shutdown Control Input Operating Voltage up to 22V Output Load Current: 3A Low Power Standby Mode Built-in Switching Transistor On Chip Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2) Halogen and Antimony Free. Green Device (Note 3) For automotive applications requiring specific change control (i.e. parts qualified to AEC-Q100/101/200, PPAP capable, and manufactured in IATF 16949 certified facilities), please contact us or your local Diodes representative. AP1507 Typical Application Circuit (1) Fixed Type Circuit (2) Adjustable Type Circuit R2 R1 FB L1 12V 4 5V/ 3A 47uH DC Input Output Output Load 1 AP1507 2 V in 5 3 SD GND C Co in D1 Capacitor Capacitor Schottky Diode R1 V = V (1 + ) OUT FB R2 V = 1.23V, R2 = 1K ~ 3K FB (3) Delay Start Circuit R2 R1 FB L1 12V 4 5V/ 3A 47uH DC Input Output Output Load 1 AP1507 2 V in C DELAY 5 3 0.1uF SD GND Co C in D1 Capacitor Capacitor R DELAY Schottky Diode 10K 2 of 12 February 2020 AP1507 Diodes Incorporated www.diodes.com Document number: DS31067 Rev. 6 - 3