AP3405

ADVANCED INFORMATION AP3405 600mA Step-down DC/DC Converter with Synchronous Rectifier Description The AP3405 is a 2.0MHz fixed frequency, current mode, PWM synchronous buck (step-down) DC-DC converter, capable of driving a 600mA load with high efficiency, excellent line and load regulation. The high efficiency is easily configured by using an inductor, resistors and capacitors as the external components. Current mode control provides fast transient response and cycle-by-cycle current limit. The AP3405 employs complete protection to ensure system security, including input Undervoltage Lockout, Over-Temperature Protection and hiccup mode Short Circuit Protection. Pin Assignments (Top View) Pin 1 Mark NC 1 NC 2 AGND 3 EP This IC is available in U-DFN2020-8 package. PGND 4 8 EN 7 FB 6 VIN 5 SW U-DFN2020-8 (Type E) Features  High-Efficiency Buck Power Converter  Input Voltage Range: 2.3V to 5.5V  Output Voltage Range: 0.7V to 5.5V  Fixed 2.0MHz Oscillator Frequency  Built-in Soft-Start Time  Built-in Overcurrent Protection  Built-in Thermal Shutdown Function  Built-in UVLO Function  Hiccup Mode SCP  Output Current: 600mA  Package: U-DFN2020-8 (Type E)  Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2)  Halogen and Antimony Free. “Green” Device (Note 3) Applications  Post DC-DC Voltage Regulation  Mobile Phones and Wearable Devices Notes: 1. No purposely added lead. Fully EU Directive 2002/95/EC (RoHS) & 2011/65/EU (RoHS 2) compliant. 2. See http:...