Diodes AP3513E User Manual
Description, Features, Pin assignments
AP3513E
Document number: DS36692 Rev.
2 - 2
1 of 11
January 2014
© Diodes Incorporated
AP3513E
A Product Line of
Diodes Incorporated
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18V, 3A SYNCHRONOUS DC-DC BUCK CONVERTER
Description
The AP3513E is a 500kHz fixed frequency, current mode, PWM
synchronous buck (step-down) DC-DC converter, capable of driving a
3A load with high efficiency, excellent line and load regulation. The
AP3513E exhibits high efficiency at light load. The device integrates
N-channel power MOSFET switch with low on-resistance. Current
mode control provides fast transient response and cycle-by-cycle
current limit.
The AP3513E employs complete protection to ensure system
security, including output Over Voltage Protection, input Under
Voltage Lock Out, programmable Soft-start, Over Temperature
Protection and hiccup mode Short Circuit Protection.
This IC is available in SO-8EP package.
Features
Input Voltage Range: 4.5V to 18V
Fixed 500kHz Frequency
High Efficiency at Light Load
Output Current: 3A
Current Mode Control
Built-in Over Current Protection
Built-in Thermal Shutdown Function
Built-in UVLO Function
Built-in Over Voltage Protection
Programmable Soft-start
Hiccup Mode SCP
Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2)
Halogen and Antimony Free. “Green” Device (Note 3)
Pin Assignments
(Top View)
(SO-8EP/ MP Package)
Applications
Monitor
TV
STB
Datacom
Notes:
1. No purposely added lead. Fully EU Directive 2002/95/EC (RoHS) & 2011/65/EU (RoHS 2) compliant.
2. See
r 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.
Typical Applications Circuit
C
C
C
OUT
22
μF*2
L
R
EN
100k
R2
R1
R
C
C
P
Optional
C
BS
10nF
C
SS
0.1
μF
3
5
1
6
7
8
2
4
AP3513E
BS
IN
SW
GND
FB
COMP
EN
SS
Input Voltage=12V
Output Voltage=3.3V
C
IN
10
μF*2
4.7
μH
3.3nF
13k
10k
26.1k
1
2
3
4
8
7
6
5
BS
IN
SW
GND
SS
EN
COMP
FB
EP