Diodes PAM2303 - Manual

PAM2303
Document number: DSxxxxx Rev. 1 - 2
1 of 14
www.diodes.com
November 2012
© Diodes Incorporated
PAM2303
A Product Line of
Diodes Incorporated
3A LOW NOISE STEP-DOWN DC-DC CONVERTER
Description
The PAM2303 is a 3A step-down DC-DC converter. It operates in two
different modes: PSM and PWM modes. At light load, it
automactically enters into the PSM mode to improve efficiency. At
heavy load, the constant frequency PWM control performs excellent
stability and transient response. No external compensation
components are required.
The PAM2303 supports a range of input voltages from 2.7V to 5.5V.
The output voltage is adjustable from 0.6V to the input voltage. The
PAM2303 employs 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 1µA. Other key features include over-
temperature and short circuit protection, and under-voltage lockout to
prevent deep battery discharge.
The PAM2303 delivers 3A maximum output current while consuming
only 42µA of no-load quiescent current. Ultra-Low R
DS(ON)
integrated
MOSFETs and 100% duty cycle operation make the PAM2303 an
ideal choice for high-output voltage, high-current applications which
require a low dropout threshold.
The PAM2303 is available in SOP-8(EP), DFN3X3-10 and QFN3X3-
16 package.
Features
• Output Current: Up to 3A
• Output Voltage: 0.6V to V
IN
• Input Voltage: 2.7 to 5.5V
• Efficiency up to 95%
• 42µA (typ) No Load Quiescent Current
• Shutdown Current: <1A
• 100% Duty Cycle Operation
• 1.5MHz Switching Frequency
• Analog Soft Start
• No external Compensation Required
• Current Limit Protection
• Thermal Shutdown
• SOP-8(EP), DFN3X3-10 and QFN3X3-16 Package
Pin Assignments
Applications
• 5V or 3.3V Point of Load Conversion
• Telecom/Networking Equipment
• Set Top Boxes
• Storage Equipment
• Video Cards
• DDR Power Supply