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PAM2305D Datasheet

1A STEP-DOWN DC-DC CONVERTER

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A Product Line of
Diodes Incorporated
PAM2305D
1A STEP-DOWN DC-DC CONVERTER
Description
The PAM2305D is a step-down current-mode, DC-DC converter. At
heavy load, the constant frequency PWM control per forms excellent
stability and transient response. To ensure the longest battery life in
portable applications, the PAM2305D provides a power-saving Pulse-
Skipping Modulation (PSM) mode to reduce quiescent current under
light load operation to save power.
The PAM2305D 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 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
0.1µA. Other key features include under-voltage lockout to prevent
deep battery discharge.
The PAM2305D is available in TSOT25, DFN2x2-6 Pin and QFN3x3-
16 Pin packages.
Pin Assignments
Top View
TSOT25
Features
Efficiency up to 96%
Only 40µA (typ) Quiescent Current
Output Current: Up to 1A
Internal Synchronous Rectifier
1.5MHz Switching Frequency
Soft Start
Under-Voltage Lockout
Short Circuit Protection
Thermal Shutdown
5-pin Small TSOT25, DFN2x2-6 Pin and QFN3x3-16 Pin
Packages
Pb-Free Packages
Applications
Cellular Phone
Portable Electronics
Wireless Devices
Cordless Phone
Computer Peripherals
Battery Powered Widgets
Electronic Scales
Digital Frame
PAM2305D
Document number: DS36396 Rev. 3 - 2
1 of 15
www.diodes.com
December 2014
© Diodes Incorporated


Diodes Semiconductor Electronic Components Datasheet

PAM2305D Datasheet

1A STEP-DOWN DC-DC CONVERTER

No Preview Available !

Typical Applications Circuit
A Product Line of
Diodes Incorporated
PAM2305D
VO
0.6
1
R1
R2

Pin Descriptions
Pin
Name
VIN
GND
EN
FB
SW
NC
TSOT25
1
2
3
4
5
Package Name
DFN2x2-6L QFN3x3-16L
Function
3 9, 10, 11, 12 Chip main power supply pin.
5 1, 2, 3, 5 Ground.
2
7
Enable Control Input. Force this pin voltage above 1.5V, enables the chip, and
below 0.3V shuts down the device.
6 4 Feedback voltage to internal error amplifier, the threshold voltage is 0.6V.
4 13, 14, 15 The drains of the internal main and synchronous power MOSFET.
1 6, 8, 16 No connection.
Functional Block Diagram
PAM2305D
Document number: DS36396 Rev. 3 - 2
2 of 15
www.diodes.com
December 2014
© Diodes Incorporated


Part Number PAM2305D
Description 1A STEP-DOWN DC-DC CONVERTER
Maker Diodes
Total Page 15 Pages
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