Diodes PAM2305 - Manual

PAM2305
Document number: DSxxxxx Rev. 2 - 6
1 of 17
www.diodes.com
January 2013
© Diodes Incorporated
PAM2305
A Product Line of
Diodes Incorporated
1A STEP-DOWN DC-DC CONVERTER
Description
The PAM2305 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 PAM2305 provides a power-saving Pulse-
Skipping Modulation (PSM) mode to reduce quiescent current under
light load operation to save power.
The PAM2305 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, while the part number suffix
PAM2305-XX indicates pre-set output voltage of 3.3V, 2.8V, 2.5V,
1.8V, 1.5V, 1.2V or adjustable. 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 0.1µA. Other
key features include under-voltage lockout to prevent deep battery
discharge.
The PAM2305 is available in TSOT25, DFN2x2-6 Pin and QFN3x3-16
Pin packages.
Features
• Efficiency up to 96%
• Only 40µA(typ) Quiescent Current
• Output Current: Up to 1A
• Internal Synchronous Rectifier
• 1.5MHz Switching Frequency
• Soft Start
• Under-Voltage Lockout
• Short Circuit Protection
• Thermal Shutdown
• 5-pin Small TSOT25, DFN2x2-6 Pin and QFN3x3-16 Pin
Packages
• Pb-Free Package
Applications
• Cellular Phone
• Portable Electronics
• Wireless Devices
• Cordless Phone
• Computer Peripherals
• Battery Powered Widgets
• Electronic Scales
• Digital Frame
Pin Assignments
Top View
TSOT25