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PAM2301 Datasheet

800mA STEP-DOWN DC-DC CONVERTER

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A Product Line of
Diodes Incorporated
PAM2301
800mA STEP-DOWN DC-DC CONVERTER
Description
The PAM2301 is a step-down current-mode, DC-DC converter. At
heavy load, the constant frequency PWM control performs excellent
stability and transient response. To ensure the longest battery life in
portable applications, the PAM2301 provides a power-saving Pulse-
Skipping Modulation (PSM) mode to reduce quiescent current under
light load operation to save power.
The PAM2301 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, while the part number suffix
PAM2301-XX indicates pre-set output voltage of 3.3V, 2.8V, 2.5V,
1.8V, 1.5V, 1.2V or adjustable. All versions employ 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 0.1mA. Other
key features include under-voltage lockout to prevent deep battery
discharge.
The PAM2301 is available in TSOT25 package.
Features
Efficiency up to 96%
Only 40μA (typ) Quiescent Current
Output Current: Up to 800mA
Internal Synchronous Rectifier
1.5MHz Switching Frequency
Soft Start
Under-Voltage Lockout
Short Circuit Protection
Thermal Shutdown
5-Pin Small TSOT25 Package
Pb-Free Package
Pin Assignments
TSOT25
Applications
Cellular Phone
Portable Electronics
Wireless Devices
Cordless Phone
Computer Peripherals
Battery-Powered Widgets
Electronic Scales
Digital Frame
Typical Applications Circuit
Fixed Output Voltage
Adjustable Output Voltage
PAM2301
Document number: DSxxxxx Rev. 2 - 7
1 of 13
www.diodes.com
VO
=
0.6
×
⎜⎛1+
R1
R2
⎟⎞
January 2013
© Diodes Incorporated


Diodes Semiconductor Electronic Components Datasheet

PAM2301 Datasheet

800mA STEP-DOWN DC-DC CONVERTER

No Preview Available !

A Product Line of
Diodes Incorporated
PAM2301
Pin Descriptions
Pin Number
1
2
3
4
5
Pin Name
EN
GND
SW
VIN
VOUT/FB
Function
Enable Control Input. Force this pin voltage above 1.5V, enables the chip, and
below 0.3V shuts down the device.
Ground
The drains of the internal main and synchronous power MOSFET.
Power Supply
VOUT: Output voltage feedback pin, an internal resistive divider divides the
output voltage down for comparison to the internal reference voltage.
FB: Feedback voltage to internal error amplifier, the threshold voltage is 0.6V.
Functional Block Diagram
PAM2301
Document number: DSxxxxx Rev. 2 - 7
2 of 13
www.diodes.com
January 2013
© Diodes Incorporated


Part Number PAM2301
Description 800mA STEP-DOWN DC-DC CONVERTER
Maker Diodes
Total Page 13 Pages
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