NOT RECOMMENDED FOR NEW DESIGN CONTACT US AP1501A 150kHz, 5A PWM BUCK DC/DC CONVERTER Description Pin Assignments The AP1501A series are monolithic ICs that are designed for a step- down DC/DC converter, and possess the ability to drive a 5A load (Top View) without additional transistor component. Due to reducing the number of external component, the board space can be saved easily. The 5 SD external shutdown function can be controlled by logic level and then 4 FB come into standby mode. The internal compensation makes feedback 3 Gnd control have good line and load regulation without external design. 2 Output Regarding protected function, thermal shutdown is to prevent over 1 V IN temperature operating from damage, and current limit is against over Metal Tab GND current operating of the output switch. The AP1501A series operates TO263-5 at a switching frequency of 150kHz thus allowing smaller sized filter components than what would be needed with lower frequency switching regulators. Other features include a guaranteed (Top View) 4% tolerance on output voltage under specified input voltage and output load conditions, and 15% on the oscillator frequency. The 5 SD output version includes fixed 3.3V, 5V, 12V and an adjustable type. 4 FB The packages are available in a standard 5-lead TO263-5, TO220-5 3 Gnd and TO220-5 (R) packages. 2 Output 1 V IN Features TO220-5/TO220-5 (R) Output Voltage: 3.3V, 5V, 12V and Adjustable Output Version Adjustable Version Output Voltage Range, 1.23V to 37V4% Applications 150kHz 15% Fixed Switching Frequency Simple High-efficiency Step-down Regulator Voltage Mode Non-synchronous PWM Control On-card Switching Regulators Thermal-shutdown and Current-limit Protection Positive to Negative Converter ON/OFF Shutdown Control Input Operating voltage can be up to 40V Output Load Current: 5A Low power Standby Mode Built-in Switching Transistor On Chip Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2) Halogen and Antimony Free. Green Devices (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. AP1501A Typical Applications Circuit (1) Fixed Type Circuit FB 12V L1 4 3.3V/5A DC Input 18uH Output Output Load AP1501A 1 2 -33 Vin Inductor 5 3 D1 SD Gnd Cin Co Schottky Capacitor Capacitor Diode (2) Adjustable Type Circuit R1 R2 FB L1 12V 4 5V/ 5A 22uH DC Input Output Output Load 1 AP1501A 2 Vin 5 3 Cin SD Gnd Co D1 Capacitor Capacitor Schottky Diode R1 V = V (1 + ) OUT FB R2 V = 1.23V FB R2 = 1k to 3k (3) Delay Start Circuit 2 of 15 February 2020 AP1501A Diodes Incorporated www.diodes.com Document number: DS31191 Rev. 13 - 3