Diodes AP3409/A - Manual

AP3409/A
Document number: DS36789 Rev. 2 - 2
1 of 11
www.diodes.com
January 2014
© Diodes Incorporated
AP3409/A
A Product Line of
Diodes Incorporated
3A, 4MHz HIGH EFFICIENCY SYNCHRONOUS BUCK CONVERTER
Description
The AP3409/A is a current mode, PWM synchronous buck DC/DC
converter, capable of driving a 3A load with high efficiency, excellent
line and load regulation. It operates in continuous PWM mode.
The AP3409/A integrates synchronous P-channel and N-channel
power MOSFET switches with low on-resistance. It is ideal for
portable applications powered from a single Li-ion battery. 100% duty
cycle and low on-resistance P-channel internal power MOSFET can
maximize the battery life.
The switching frequency of AP3409/A can be programmable from
300kHz to 4MHz, which allows small-sized components, such as
capacitors and inductors. A standard series of inductors from several
different manufacturers are available. This feature greatly simplifies
the design of switch-mode power supplies.
The AP3409/A is available in U-DFN3030-10 package.
Features

Input Voltage Range: 2.6V to 5.5V
 Adjustable Output from 0.8V to 5V

0.8V Reference Voltage with ± 2% Precision

Output Current: 3A
 High Efficiency up to 95%

Low R
DSON
Internal Switches

Programmable Frequency: 300kHz to 4MHz

Current Mode Control
 Forced Continuous-mode Operation

100% Duty Cycle

Built-in Soft-start

Built-in Short Circuit Protection
 Built-in Thermal Shutdown Protection

Built-in Current Limit Function

PGOOD Output Voltage Monitoring (For AP3409A)

U-DFN3030-10 package
 Totally Lead-free & Fully RoHS Compliant (Note 1 & 2)

Halogen and Antimony Free. “Green” Device (Note 3)
Pin Assignments
(Top View)
U-DFN3030-10 (DN Package)
For AP3409
(Top View)
U-DFN3030-10 (DN Package)
For AP3409A
Applications

Portable Media Player

Digital Still and Video Cameras
 Notebook
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/quality/lead_free.html 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.
SHDN/RT
GND
SW
SW
PGND
COMP
FB
VDD
PVDD
PVDD
Pin 1 Mark
1
2
3
4
5 6
7
8
9
10
Exposed Pad
Connected to
PGND
SHDN/RT
GND
SW
SW
PGND
COMP
FB
PGOOD
VDD
PVDD
Pin 1 Mark
1
2
3
4
5 6
7
8
9
10
Exposed Pad
Connected to
PGND