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PAM2322AGEAR Datasheet

Dual High-Efficiency PWM Step-Down DC-DC Converter

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A Product Line of
Diodes Incorporated
PAM2322AGEAR
Dual High-Efficiency PWM Step-Down DC-DC Converter
Description
The PAM2322AGEAR is a dual step-down current-mode, DC-DC
converter. At heavy load, the constant-frequency PWM control
performs with excellent stability and transient response. To ensure
the longest battery life in portable applications, the PAM2322AGEAR
provides a power-saving Pulse-Skipping Modulation (PSM) mode to
reduce quiescent current under light load operation
Pin Assignments
The PAM2322AGEAR 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. Output 1
is a 1.8V fixed output. Output 2 is adjustable from 0.9V to VIN. Both
outputs employ an internal power switch and synchronous rectifier to
minimize external part count and realize high efficiency.
Output 1 delivers up to 1000mA output current while output 2 delivers
up to 2000mA. Each regulator has an independent enable pin.
Each output of the PAM2322AGEAR can be disabled when a logic
low is applied to the channel enable pin. During shutdown, the input is
disconnected from the output and the shutdown current is less than
0.1μA
W-FLGA2520-17
Other key features include under-voltage lockout, soft-start, hiccup
mode short circuit protection and thermal shutdown.
Features
Supply Voltage:2.7V to 5.5V
Output Current:
OUT1: 1000mA/Buck, 1.8V Fixed Output
OUT2: 2000mA/Buck
Switching Frequency:1.2MHz
Internal Synchronous Rectifier
Fast Transient Response
Fast Turn On and Turn Off
Internal Soft Start
Internal Compensation
100% Duty Cycle Operation
Power Good Indicator for OUT1
Under-Voltage Lockout
Hiccup Mode Short Circuit Protection
Thermal Shutdown
Small W-FLGA2520-17 Package
Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2)
Halogen and Antimony Free. “Green” Device (Note 3)
Applications
Portable Electronics
Personal Information Appliances
Wireless and DSL Modems
Notes:
1. No purposely added lead. Fully EU Directive 2002/95/EC (RoHS) & 2011/65/EU (RoHS 2) compliant.
2. See http://www.diodes.com for more information about Diodes Incorporated’s definitions of Halogen- and Antimony-free, "Green" and Lead-free.
3. Halogen- and Antimony-free "Green” products are defined as those which contain <900ppm bromine, <900ppm chlorine (<1500ppm total Br + Cl) and
<1000ppm antimony compounds.
PAM2322AGEAR
Document Number: DS36234 Rev. 2 - 2
1 of 13
www.diodes.com
September 2014
© Diodes Incorporated


Diodes Semiconductor Electronic Components Datasheet

PAM2322AGEAR Datasheet

Dual High-Efficiency PWM Step-Down DC-DC Converter

No Preview Available !

Typical Applications Circuit
VIN
3.3V
CIN
10uF
EN1
EN2
CIN
10uF
SW1
VIN OUT1
PG1
EN1
PAM2322
EN2
GND
SW2
OUT2
FB2
A Product Line of
Diodes Incorporated
PAM2322AGEAR
L1
1.5µH
COUT1
10uF
VOUT1
1.8V
PG1
L2
1.0µH
Rfb_up
205kΩ
Rfb_dn
200kΩ
COUT2
10uF
COUT2
10uF
VOUT2
1.22V
Pin Descriptions
W-FLGA2520-17 Name
Function
1, 15
2, 9, 16, 17
3
4
5
6
7
8
10
11, 12, 13, 14
SW2 Switch PIN for Output 2, PIN 1 and 15 can be connected on the PCB
GND
OUT2
FB2
Ground pin, PIN 2, 9, 16, 17 can be connected on the PCB
Output sense pin of Output 2
Feedback pin for Output 2, the reference is set internally to 0.6V
EN2 Enable for Output 2. Pull high to enable channel 2. Pull low to disable
PG1 Output 1 power good indicator pin, open drain output
EN1 Enable for Output 1. Pull high to enable channel 1. Pull low to disable
OUT1 Output pin of Output 1, Channel one is internally fixed to 1.8V
SW1 Switch Pin for Output 1
VIN Input voltage pin. PIN 11, 12, 13, 14 can be connected on the PCB
PAM2322AGEAR
Document Number: DS36234 Rev. 2 - 2
2 of 13
www.diodes.com
September 2014
© Diodes Incorporated


Part Number PAM2322AGEAR
Description Dual High-Efficiency PWM Step-Down DC-DC Converter
Maker Diodes
Total Page 13 Pages
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