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PAM2319AYAA

P1-P3P4-P6P7-P9P10-P12
PAM2319
Document number: DSxxxxx Rev. 1 - 1
1 of 12
www.diodes.com
November 2012
© Diodes Incorporated
PAM2319
A
Product Line o
f
Diodes Incorporated
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.
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
Pin Assignments
Applications
Portable Electronics
Personal Information Appliances
Wireless and DSL Modems
PAM2319
Document number: DSxxxxx Rev. 1 - 1
2 of 12
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November 2012
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Diodes Incorporated
Typical Applications Circuit
Figure 1. Adjustable Voltage Regulator
Pin Descriptions
Pin
Number
W-DFN3x3-12L
Pin Name
Function
1 FB2 Channel 2 feedback pin internally set to 0.6V.
2 VIN2 Input voltage pin of channel 2.
3 AGND2 Signal ground of channel 2 for small signal components.
4 VIN1 Input voltage pin of channel 1.
5 PGND1 Main power ground pin of channel 1
6 SW1 Channel 1 switching pin. The drains of the internal main and synchronous power MOSFET.
7 FB1 Channel 1 feedback pin internally set to 0.6V.
8 AGND1 Signal ground of channel 1 for small signal components.
9 EN1 Enable control input. Pull logic high to enable Vo1. Pull logic low to disable.
10 EN2 Enable control input. Pull logic high to enable Vo2. Pull logic low to disable.
11 PGND2 Main power ground pin of channel 2.
12 SW2 Channel 2 switching pin. The drains of the internal main and synchronous power MOSFET.
— Exposed Pad Connect to GND
PAM2319
Document number: DSxxxxx Rev. 1 - 1
3 of 12
www.diodes.com
November 2012
© Diodes Incorporated
PAM2319
A
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Diodes Incorporated
Functional Block Diagram
Note: 1. The diagram above just shows one channel.
Absolute Maximum Ratings (@T
A
= +25°C, unless otherwise specified.)
These are stress ratings only and functional operation is not implied. Exposure to absolute maximum ratings for prolonged time periods may
affect device reliability. All voltages are with respect to ground.
Parameter Rating Unit
Input Voltage -0.3 to 6.5 V
EN1, FB1, SW1, EN2, FB2 and SW2 Pin Voltage
-0.3 to (V
IN
+0.3)
V
Maximum Junction Temperature 150 °C
Storage Temperature Range -65 to +150 °C
Soldering Temperature 260, 10sec °C
Recommended Operating Conditions (@T
A
= +25°C, unless otherwise specified.)
Parameter Rating Unit
Supply Voltage 2.7 to 5.5 V
Ambient Temperature Range -40 to +85
°C
Junction Temperature Range -40 to +1255
Thermal Information
Parameter Symbol Package Max Unit
Thermal Resistance (Junction to Ambient)
θ
JA
W-DFN3x3-12L 60
°C/W
Thermal Resistance (Junction to Case)
θ
JC
W-DFN3x3-12L 8.5
P1-P3P4-P6P7-P9P10-P12

PAM2319AYAA

Mfr. #:
Buy PAM2319AYAA
Manufacturer:
Diodes Incorporated
Description:
Switching Voltage Regulators DUAL HI-EFF PWM SD DC/DC CNVTR
Lifecycle:
New from this manufacturer.
Delivery:
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