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Diodes Semiconductor Electronic Components Datasheet

AP3409 Datasheet

4MHz HIGH EFFICIENCY SYNCHRONOUS BUCK CONVERTER

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AP3409 pdf
A Product Line of
Diodes Incorporated
AP3409/A
3A, 4MHz HIGH EFFICIENCY SYNCHRONOUS BUCK CONVERTER
Description
Pin Assignments
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 RDSON 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. GreenDevice (Note 3)
(Top View)
Pin 1 Mark
SHDN/RT 1
GND 2
SW 3
SW 4
PGND 5
Exposed Pad
Connected to
PGND
10 COMP
9 FB
8 VDD
7 PVDD
6 PVDD
U-DFN3030-10 (DN Package)
For AP3409
(Top View)
Pin 1 Mark
SHDN/RT 1
GND 2
SW 3
SW 4
PGND 5
Exposed Pad
Connected to
PGND
10 COMP
9 FB
8 PGOOD
7 VDD
6 PVDD
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.
AP3409/A
Document number: DS36789 Rev. 2 - 2
1 of 11
www.diodes.com
January 2014
© Diodes Incorporated


Diodes Semiconductor Electronic Components Datasheet

AP3409 Datasheet

4MHz HIGH EFFICIENCY SYNCHRONOUS BUCK CONVERTER

No Preview Available !

AP3409 pdf
Typical Applications Circuit (Note 4)
A Product Line of
Diodes Incorporated
AP3409/A
VIN
5V
ROSC 330k
SHDN/RT COMP
GND
SW
PGND
FB
VDD
PVDD
L1 2.0mH
RCOMP 30k CCOMP 1000pF
R2 240k
C1
22pF
CIN
22mF
R1
510k
COUT
22mF ×2
Typical Application of AP3409
VOUT
2.5V/3A
VIN
5V
ROSC 330k
SHDN/RT COMP
GND
SW
PGND
FB
PGOOD
R4
VDD 100k
(PVDD)
L1 2.0mH
RCOMP 30k CCOMP 1000pF
R2 240k
C1
22pF
CIN
22mF
R1
510k
COUT
22mF ×2
VOUT
2.5V/3A
Notes 4:
VOUT
VFB (R1 R2)
R2
Typical Application of AP3409A
AP3409/A
Document number: DS36789 Rev. 2 - 2
2 of 11
www.diodes.com
January 2014
© Diodes Incorporated


Part Number AP3409
Description 4MHz HIGH EFFICIENCY SYNCHRONOUS BUCK CONVERTER
Maker Diodes Incorporated
Total Page 11 Pages
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