NOT RECOMMENDED FOR NEW DESIGN - Use AP61100 PAM2304 3MHz, 1A STEP-DOWN DC-DC CONVERTER Description Pin Assignments The PAM2304 is a step-down current-mode, DC-DC converter. At heavy load, the constant frequency PWM control performs excellent stability and transient response. To ensure the longest battery life in portable applications, the PAM2304 provides a power-saving Pulse- Skipping Modulation (PSM) mode to reduce quiescent current under light load operation to save power. The PAM2304 supports a range of input voltages from 2.5V to 5.5V, allowing the use of a single Li+/Li-polymer cell, multiple Alkaline/NiMH cell, USB and other standard power sources. The output voltage is adjustable from 0.6V to the input voltage. All versions employ internal power switch and synchronous rectifier to minimize external part count and realize high efficiency. During shutdown, the input is disconnected from the output and the shutdown current is less than 1A. Other key features include under-voltage lockout to prevent deep battery discharge. The PAM2304 is available in TSOT25 and U-DFN2020-6 (Type C) packages. Applications Features Smart Phone MID Efficiency up to 95% Portable Electronics Only 40A (typical) Quiescent Current Wireless Devices Output Current: up to 1A Cordless Phone Internal Synchronous Rectifier Computer Peripherals 3MHz Switching Frequency Battery Powered Widgets Soft Start Electronic Scales Under Voltage Lockout Digital Frame Short Circuit Protection Thermal Shutdown Small TSOT25 and U-DFN2020-6 (Type C) Packages 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) & 2015/863/EU (RoHS 3) compliant. 2. See NOT RECOMMENDED FOR NEW DESIGN - PAM2304 Use AP61100 Pin Descriptions Function Pin Name TSOT25 U-DFN2020-6 (Type C) Enable Control Input. Force this pin voltage above 1.5V, enables the chip, and below 0.3V EN 1 4 shuts down the device. GND 2 6 Ground. SW 3 1 The drains of the internal main and synchronous power MOSFET. 4 5 Chip main power supply pin. VIN FB 5 3 Feedback voltage to internal error amplifier, the threshold voltage is 0.6V. AGND Analog Ground. PGND Main power ground return pin. NC 2 Not Connected. Functional Block Diagram 2 of 13 PAM2304 September 2019 Diodes Incorporated www.diodes.com Document number: DS36386 Rev. 3 - 3