PAM2307
3A Low Noise Step-Down DC-DC Converter
Features
n
n
n
n
n
n
n
n
n
n
n
n
n
Output Current: Up to 3A
Output Voltage: 0.6V to V
IN
Input Voltage: 2.7 to 5.5V
Efficiency up to 95%
42
μ
A (Typ) No Load Quiescent Current
Shutdown Current: <1
μ
A
100% Duty Cycle Operation
1.5MHz Switching Frequency
Internal Soft Start
No external Compensation Required
Current Limit Protection
Thermal Shutdown
QFN3x3 16-Pin and SOP-8(EP) Package
Description
T h e PA M 2 3 0 7 i s a 3 A s t e p - d o w n D C - D C
converter. At heavy load, the constant-frequency
PWM control performs excellent stability and
transient response. No external compensation
components are required
.
The PAM2307 supports a range of input voltages
from 2.7V to 5.5V, allowing the use of a single
L i + /L i - p o l y m e r c e l l , m u l ti p l e A l k a l i n e /N i M H
cell,and other standard power sources. The
output voltage is adjustable from 0.6V to the input
voltage. The PAM2307 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
1
μ
A. Other key features include over-temperature
and short circuit protection, and under-voltage
lockout to prevent deep battery discharge.
The PAM2307 delivers 3A maximum output
current while consuming only 42
μ
A of no-load
quiescent current. Ultra-low RDS(ON) integrated
MOSFETs and 100% duty cycle operation make
the PAM2307 an ideal choice for high output
voltage, high current applications which require a
low dropout threshold.
The PAM2307 is available in QFN3x3 16-Pin and
SOP-8(EP) package.
Applications
n
n
n
n
n
n
5V or 3.3V Point of Load Conversion
Telecom/Networking Equipment
Set Top Boxes
Storage Equipment
Video Cards
DDR Power Supply
Typical Application
U1
L1
VIN
R3
PVIN
SW
2
1
C3
R 1 100pF
FB
R2
C2
VOU T
1k
VI N
C1
EN
C4
PAM2307
22uF
22uF
1uF
TEST
R
1
V
O
=
0.6
1
+
R
2
Power Analog Microelectronics
,
Inc
www.poweranalog.com
03/2011 Rev2.1
1
PAM [ POWER ANALOG MICOELECTRONICS ]
