PAM2320 Datasheet, PDF (1/11 Pages) Power Analog Micoelectronics – 3A Low Noise Step-Down DC-DC Converter

PAM2320
3A Low Noise Step-Down DC-DC Converter
Features
n Output Current: Up to 3A
n Output Voltage: 0.6V to V_IN
n Input Voltage: 2.7 to 5.5V
n Efficiency up to 95%
n 42 μA (Typ) No Load Quiescent Current
n Shutdown Current: <1 μA
n 100% Duty Cycle Operation
n 1.5MHz Switching Frequency
n Internal Soft Start
n No external Compensation Required
n Current Limit Protection
n Thermal Shutdown
n PSOP-8 Package
Applications
n 5V or 3.3V Point of Load Conversion
n Telecom/Networking Equipment
n Set Top Boxes
n Storage Equipment
n Video Cards
n DDR Power Supply
Description
The PAM2320 is a 3A step-down DC-DC
converter. At heavy load, the constant-frequency
PWM control performs excellent stability and
transient response. No external compensation
components are required.
The PAM2320 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,and other standard power sources. The
output voltage is adjustable from 0.6V to the input
voltage. The PAM2320 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 PAM2320 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 PAM2320 an ideal choice for high output
voltage, high current applications which require a
low dropout threshold.
The PAM2320 is available in PSOP8 package.
Typical Application
VIN
C IN
4202uuFF
0
VIN (2)
(3)SW
PPAAMM22331200
EN(7)
(5)FB
NC (1,6,8)
GND(4)
0
VO
=
0.6 1 +
R1
R2


L
VO
R1
Cf w
1 0 0p
R2
Co
3202uuFF
0
0
Power Analog Microelectronics, Inc
www.poweranalog.com
1
05/2011 Rev1.0