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PAM2308 Datasheet

DUAL HIGH-EFFICIENCY PWM STEP-DOWN DC-DC CONVERTER

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A Product Line of
Diodes Incorporated
PAM2308
DUAL HIGH-EFFICIENCY PWM STEP-DOWN DC-DC CONVERTER
Description
The PAM2308 is a dual 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 PAM2308 provides a power-
saving Pulse- Skipping Modulation (PSM) mode to reduce quiescent
current under light load operation.
The PAM2308 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 dual output
voltages are available for 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 0.1µA. Other key features
include under-voltage lockout to prevent deep battery discharge.
Features
Efficiency up to 96%
Only 40μA (typ per channel) Quiescent Current
Output Current: Up to 1A per Channel
Internal Synchronous Rectifier
1.5MHz Switching Frequency
Soft-Start
Under-Voltage Lockout
Short Circuit Protection
Thermal Shutdown
Small WDFN3x3-10L Packages
Pb-Free Package and RoHS Compliant
Pin Assignments
Applications
Cellular Phone
Portable Electronics
Personal Information Appliances
Wireless and DSL Modems
MP3 Players
Typical Applications Circuit
PAM2308
Document number: DSxxxxx Rev. 1 - 1
VOUTx
=
VREF ⎜⎛1 +
Rx1
Rx2
⎟⎞
Figure
1.
Adjustable Voltage Regulator
1 of 15
www.diodes.com
January 2013
© Diodes Incorporated


Diodes Semiconductor Electronic Components Datasheet

PAM2308 Datasheet

DUAL HIGH-EFFICIENCY PWM STEP-DOWN DC-DC CONVERTER

No Preview Available !

Typical Applications Circuit (cont.)
A Product Line of
Diodes Incorporated
PAM2308
VOUTx = 1.2V, 1.5V, 1.8V, 2.5V, 2.8V or 3.3V
Figure 2. Fixed Voltage Regulator
Pin Descriptions
Pin
Name
EN1
FB1
VIN2
GND
LX2
EN2
FB2
VIN1
LX1
Pin
Number
1
2
3
4, 9
5
6
7
8
10
Function
Chip Enable of Channel 1(Active High). VEN1 VIN1.
Feedback of Channel 1.
Power Input of Channel 2.
Ground. The exposed pad must be soldered to a large PCB and connected to GND for maximum power
dissipation.
Pin for Switching of Channel 2.
Chip Enable of Channel 2 (Active High).VEN2 VIN2.
Feedback of Channel 2.
Power Input of Channel 1.
Pin for Switching of Channel 1.
PAM2308
Document number: DSxxxxx Rev. 1 - 1
2 of 15
www.diodes.com
January 2013
© Diodes Incorporated


Part Number PAM2308
Description DUAL HIGH-EFFICIENCY PWM STEP-DOWN DC-DC CONVERTER
Maker Diodes
Total Page 15 Pages
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