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Diodes Incorporated PAM2303

3A LOW NOISE STEP-DOWN DC-DC CONVERTER

Overview

TopologyBuck Converter
Input voltage2.7-5.5 V
Switching frequency1200-1800 kHz
Output 11.2 V / 3 A
IC revision1-2

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 RDS(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 VIN
  • 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

Remarks:the value of the inductor will fall in the range of 1μH to 3.3μH.Refer page no.8

Typical applications

  • Telecom/Networking Equipment
  • Storage Equipment
  • Video Cards
  • 5V or 3.3V Point of Load Conversion
  • DDR Power Supply
  • Set Top Boxes

Products

Order Code Data­sheet Downloads Product seriesL
(µH)
IR
(A)
ISAT
(A)
RDC typ.
(mΩ)
RDC max.
(mΩ)
fres
(MHz)
SizeVersion Samples
7447786001
IGS STP ALT EAG CAD LTS PSP SPE CADWE-PD SMT Power Inductor 1 5 5.5 28 34 180 6050 Robust
Order Code Data­sheet
7447786001
Samples
Order Code Data­sheet Downloads Product seriesL
(µH)
IR
(A)
ISAT
(A)
RDC typ.
(mΩ)
RDC max.
(mΩ)
fres
(MHz)
SizeVersion Samples