AP2014/A
SYNCHRONOUS PWM CONTROLLER
Features
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Synchronous Controller in 8-Pin Package
Operating with single 5V or 12V supply voltage
Internal 200KHz Oscillator (400KHz for AP2014A)
Soft-Start Function
Fixed Frequency Voltage Mode
500mA Peak Output Drive Capability
Protects the output when control FET is shorted
Lead Free Package SOP-8L
SOP-8L: Available in “Green” Molding Compound
(No Br, Sb)
Lead Free Finish/ RoHS Compliant (Note 1)
General Description
The AP2014 controller IC is designed to provide a low cost
synchronous Buck regulator for on-board DC to DC converter
applications. With today’s ASIC products requiring supply voltages
at 1.8V and lower, when the output current is as much as 3A and
the input voltage is at either 3.3V or 5V, traditional linear regulator
simply incurs too much loss within itself. The AP2014 together with
dual N-channel MOSFETs provide a low cost solution for such
applications. This device features an internal 200KHz oscillator
(400KHz for "A" version), under-voltage lockout for both Vcc and
Vc supplies, an external programmable soft-start function as well
as output under-voltage detection that latches off the device when
an output short is detected.
Applications
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Graphic Card
Hard Disk Drive
DDR memory source sink Vtt application
Low cost on-board DC to DC such as 5V to 3.3V, 2.5V or 1.8V
Ordering Information
AP 2014/A S X - 13
Package
S : SOP-8L
Lead Free
L : Lead Free
G : Green
Packing
13 : Tape & Reel
Device
Lead-free
Lead-free
AP2014SL-13
AP2014SG-13
AP2014ASL-13
AP2014ASG-13
Notes:
Package
Code
S
S
S
S
Packaging
(Note 2)
SOP-8L
SOP-8L
SOP-8L
SOP-8L
13” Tape and Reel
Quantity
Part Number Suffix
2500/Tape & Reel
-13
2500/Tape & Reel
-13
2500/Tape & Reel
-13
2500/Tape & Reel
-13
1. EU Directive 2002/95/EC (RoHS). All applicable RoHS exemptions applied, see
EU Directive 2002/95/EC Annex Notes.
2. Pad layout as shown on Diodes Inc. suggested pad layout document AP02001, which can be found on our website at
http://www.diodes.com/datasheets/ap02001.pdf.
AP2014/A Rev. 5
1 of 14
FEBRUARY 2009
www.diodes.com
©
Diodes Incorporated
AP2014/A
SYNCHRONOUS PWM CONTROLLER
Pin Assignment
( Top View )
FB
VCC
LDrv
GND
1
2
3
4
8
7
6
5
SS
Comp
Vc
HDrv
SOP-8L
Pin Descriptions
Pin Name
FB
Vcc
LDrv
GND
HDrv
Vc
Pin No.
1
2
3
4
5
6
Description
This pin is connected directly to the output of the switching regulator via resistor
divider to provide feedback to the Error amplifier.
This pin provides biasing for the internal blocks of the IC as well as power for the
low side driver. A minimum of 1uF, high frequency capacitor must be connected
from this pin to ground to provide peak drive current capability.
Output driver for the synchronous power MOSFET.
This pin serves as the ground pin and must be connected directly to the ground
plane. A high frequency capacitor (0.1 to 1uF) must be connected from V5 and
V12 pins to this pin for noise free operation.
Output driver for the high side power MOSFET.
This pin is connected to a voltage that must be at least 4V higher than the bus
voltage of the switcher (assuming 5V threshold MOSFET) and powers the high
side output driver. A minimum of 1uF, high frequency capacitor must be
connected from this pin to ground to provide peak drive current capability.
Compensation pin of the error amplifier. An external resistor and capacitor
network is typically connected from this pin to ground to provide loop
compensation.
This pin provides soft-start for the switching regulator. An internal current source
charges an external capacitor that is connected from this pin to ground which
ramps up the output of the switching regulator, preventing it from overshooting as
well as limiting the input current. The converter can be shutdown by pulling this
pin below 0.5V.
Comp
7
SS
8
AP2014/A Rev. 5
2 of 14
FEBRUARY 2009
www.diodes.com
©
Diodes Incorporated
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