Diodes PAM2319 - Manual

PAM2319
Document number: DSxxxxx Rev. 1 - 1
1 of 12
www.diodes.com
November 2012
© Diodes Incorporated
PAM2319
A Product Line of
Diodes Incorporated
DUAL HIGH-EFFICIENCY PWM STEP-DOWN DC-DC CONVERTER
Description
The PAM2319 is a dual step-down current-mode, DC-DC converter.
At heavy load, the constantf requency PWM control performs
excellent stability and transient response. To ensure the longest
battery life in portable applications, the PAM2319 provides a power-
saving Pulse-Skipping Modulation (PSM) mode to reduce quiescent
current under light load operation.
The PAM2319 supports a range of input voltages from 2.7V to 5.5V,
allowing the use of a single Li+/Li-polymer cell, multiple Alkaline/NiMH
cell, USB, and other standard power sources. The dual output
voltages are adjustable from 1.0V to 3.3V. Both channels 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, soft-start,
short circuit protection and thermal shutdown.
Features
 Supply Voltage: 2.7V to 5.5V
 Output Voltage:
 Vo1 ADJ/1000mA
 Vo2 ADJ/2000mA
 Low Quiescent Current: Channel 1: 40µA; Channel 2: 55µA
 High Efficiency:
 Switching Frequency: 3MHz(Channel 1)
2.5MHz(Channel 2)
 Internal Synchronous Rectifier
 Soft Start
 Under-Voltage Lockout
 Short Circuit Protection
 Thermal Shutdown
 Small W-DFN3X3-12L Pb-Free/Halogen Free Package
 RoHS/REACH Compliant
Pin Assignments
Applications
 Portable Electronics
 Personal Information Appliances
 Wireless and DSL Modems