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PAM2319 Datasheet

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

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A Product Line of
Diodes Incorporated
PAM2319
DUAL HIGH-EFFICIENCY PWM STEP-DOWN DC-DC CONVERTER
Description
The PAM2319 is a dual step-down current-mode, DC-DC converter.
At heavy load, the constantf requency PWM control performs
excellent stability and transient response. To ensure the longest
battery life in portable applications, the PAM2319 provides a power-
saving Pulse-Skipping Modulation (PSM) mode to reduce quiescent
current under light load operation.
The PAM2319 supports a range of input voltages from 2.7V 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 adjustable from 1.0V to 3.3V. Both channels 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, soft-start,
short circuit protection and thermal shutdown.
Pin Assignments
Features
Supply Voltage: 2.7V to 5.5V
Output Voltage:
Vo1 ADJ/1000mA
Vo2 ADJ/2000mA
Low Quiescent Current: Channel 1: 40µA; Channel 2: 55µA
High Efficiency:
Switching Frequency: 3MHz(Channel 1)
2.5MHz(Channel 2)
Internal Synchronous Rectifier
Soft Start
Under-Voltage Lockout
Short Circuit Protection
Thermal Shutdown
Small W-DFN3X3-12L Pb-Free/Halogen Free Package
RoHS/REACH Compliant
Applications
Portable Electronics
Personal Information Appliances
Wireless and DSL Modems
PAM2319
Document number: DSxxxxx Rev. 1 - 1
1 of 12
www.diodes.com
November 2012
© Diodes Incorporated


Diodes Semiconductor Electronic Components Datasheet

PAM2319 Datasheet

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

No Preview Available !

Typical Applications Circuit
A Product Line of
Diodes Incorporated
PAM2319
Figure 1. Adjustable Voltage Regulator
Pin Descriptions
Pin
Number
1
2
3
4
5
6
7
8
9
10
11
12
W-DFN3x3-12L
Pin Name
FB2
VIN2
AGND2
VIN1
PGND1
SW1
FB1
AGND1
EN1
EN2
PGND2
SW2
Exposed Pad
Function
Channel 2 feedback pin internally set to 0.6V.
Input voltage pin of channel 2.
Signal ground of channel 2 for small signal components.
Input voltage pin of channel 1.
Main power ground pin of channel 1
Channel 1 switching pin. The drains of the internal main and synchronous power MOSFET.
Channel 1 feedback pin internally set to 0.6V.
Signal ground of channel 1 for small signal components.
Enable control input. Pull logic high to enable Vo1. Pull logic low to disable.
Enable control input. Pull logic high to enable Vo2. Pull logic low to disable.
Main power ground pin of channel 2.
Channel 2 switching pin. The drains of the internal main and synchronous power MOSFET.
Connect to GND
PAM2319
Document number: DSxxxxx Rev. 1 - 1
2 of 12
www.diodes.com
November 2012
© Diodes Incorporated


Part Number PAM2319
Description DUAL HIGH-EFFICIENCY PWM STEP-DOWN DC-DC CONVERTER
Maker Diodes
Total Page 12 Pages
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