PAM2304
3MHz, 1A Step-Down DC-DC Converter
Features
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Efficiency up to 95%
Only 40
μ
A(TYP.) Quiescent Current
Output Current: Up to 1A
Internal Synchronous Rectifier
3MHz Switching Frequency
Soft Start
Under-Voltage Lockout
Short Circuit Protection
Thermal Shutdown
Small TSOT23-5, TDFN22-8 and
TDFN22-6 Packages
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RoHS Pass and Green Package
General Description
The PAM2304 is a step-down current-mode, DC-
DC converter. At heavy load, the constant-
frequency P WM cont rol per for ms exc ellent
stability and transient response. To ensure the
longest battery life in portable applications, the
PA M 2 3 0 4 p r o v i d e s a p o w e r - s a v i n g P u l s e -
Skipping Modulation (PSM) mode to reduce
quiescent current under light load operation to
save power.
The PAM2304 supports a range of input voltages
from 2.5V to 5.5V, allowing the use of a single
Li+/Li-polymer cell, multiple Alkaline/NiMH cell,
USB, and other standard power sources. The
output voltage is adjustable from 0.6V to the input
voltage. All versions employ internal power switch
and synchronous rectifierfor 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 under-voltage lockout
to prevent deep battery discharge.
The PAM2304 is available in TSOT23-5, TDFN22-
8 and TDFN22-6 packages.
Applications
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Smart Phone
MID
Portable Electronics
Wireless Devices
Cordless Phone
Computer Peripherals
Battery Powered Widgets
Electronic Scales
Digital Frame
Typical Application
V
IN
C
IN
10µF
L
1uH
VIN
GND
SW
R1
Cfw
100pF
Vo
Co
10µF
FB
R2
EN
R
1
V
O
=
0.6
1
+
R
2
Power Analog Microelectronics
,
Inc
www.poweranalog.com
11/2011 Rev1.1
1
PAM [ POWER ANALOG MICOELECTRONICS ]
