AP5001
PWM CONT RO L 1. 5A S TE P -DOWN CONVERTER
AP5001 Rev. 1 1 of 9 OCTOBER 2007
www.diodes.com © Diodes Incorporated
• Input voltage: 3.6V to 20V
• Output voltage: 0.8V to VCC
• Duty ratio: 0% to 100% PWM control
• Oscillation frequency:800KHz typ
• Soft-start Current Limit, Enable function
• Thermal Shutdown function
• Built-in internal SW P-channel MOS
• Low ESR output capacitor (MLCC, multi-layer ceramic
capacitor) support
• Efficiency 86%
• SOP-8L: Available in “Gr een” Molding Compound
(No Br, Sb)
• Lead Free Finish / RoHS Compliant (Note 1)
AP5001 consists of step-down switching regulator with PWM
control. These devices include a reference voltage source,
oscillation circuit, error amplifier, internal PMOS.
AP5001 provides low-ri pple power, high efficiency, and excellent
transient characteristics. The PWM control circuit is able to vary
the duty ratio linearly from 0 up to 100%. This converter also
contains an error amplifier circuit as well as a soft-start circuit that
prevents overshoot at startup. An enable function, an over
current protect fun ction and a sh ort circuit protect function are b uilt
inside, and when OCP or SCP happens, the operation frequency
will be reduced from 800KHz to 50KHz. Also, an internal
compensation block is built in to minimum external component
count.
With the addition of an internal P-channel Power MOS, a coil,
capacitors, and a diode c onnected externally, th ese ICs can
function as step-down switching regulators. They serve as ideal
power supply units for portable devices when coupled with the
SOP–8L mini-p ackage, providing such outstanding feat ures as
low current consumption. Since this converter can accommodate
an input voltage up to 20V, it is also suitable for the operation via
an AC adapter.
• PC Motherboard
• LCD Monitor
• Graphic Card
• DVD-Video Pla yer
• Telecom Equipment
• ADSL Mo dem
• Printer and other Peripheral Equipment
• Microprocessor co re supply
• Networking power supply
AP5001 X X X
Package Packing
S: SOP-8L -U : Tube
-13 : Tape & Reel
Lead Free
G:Green
Note: 1. RoHS revision 13.2.2003. Glass and High Temperature Solder Exemptions Applied, see EU Directive Annex Notes 5 and 7.
Tube 13” Tape and Reel
Device Package
Code Packaging
(Note 2) Quantity Part Number
Suffix Quantity Part Number
Suffix
AP5001S S SOP-8L 100 -U 2500/Tape & Reel -13
Note: 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.
Features General Description
Applications
Ordering Information
AP5001
PWM CONT RO L 1. 5A S TE P -DOWN CONVERTER
AP5001 Rev. 1 2 of 9 OCTOBER 2007
www.diodes.com © Diodes Incorporated
( Top View )
1
2
3
4
8
7
6
5
FB
Output
Comp
SOP-8L
AP5001
Output
EN
Vss
Vss
VCC
Name Pin Description
FB 1 Feedback pin
EN 2
Power-off pin
H: Normal operation
(Step-down operation)
L: Step-down operation stopped
(All circuits deactivated)
Comp 3 Compensation pin
VCC 4 IC power supply pin
Output 5、6 Switch Pin. Connect external
inductor/diode here. Minimize trace
area at this pin to reduce EMI.
VSS 7、8 GND Pin
Block Diagram
Oscillation
Circuit Reference Voltage Source
PWM-Switched
Control Circuit
+
-
Vss
VEN
EN
100uA
Comp
FB
Vcc
Thermal
Shutdown
Output
Pin Assignments Pin Descriptions
AP5001
PWM CONT RO L 1. 5A S TE P -DOWN CONVERTER
AP5001 Rev. 1 3 of 9 OCTOBER 2007
www.diodes.com © Diodes Incorporated
Absolute Maximum Ratings
Symbol Parameter Rating Unit
ESD HBM Human Body Model ESD Protection 5 KV
ESD MM Machine Model ESD Protection 200 V
VCC VCC Pin Voltage VSS - 0.3 to VSS + 22 V
VFB Feedback Pin Voltage VSS - 0.3 to VCC V
VEN EN Pin Volt age VSS - 0.3 to VIN V
VOUTPUT Switch Pin Voltage VSS - 0.3 to VIN V
PD Power Dissipat ion 1000 mW
TJ Operating Junction Temperature Range -20 to +125 oC
TST Storage Temperature Range -65 to +150 oC
Caution: The absolute maximum ratings are rated values exceeding which the product could suffer physical damage. These values must theref ore not be
exceeded under any conditions.
Recommended Operating Conditions
Symbol Parameter Min Max Unit
VIN Input Voltage 3.6 20 V
IOUT Output Current 0 1.5 A
TA Operating Ambient Temperature -20 85 oC
AP5001
PWM CONT RO L 1. 5A S TE P -DOWN CONVERTER
AP5001 Rev. 1 4 of 9 OCTOBER 2007
www.diodes.com © Diodes Incorporated
Electrical Characteristics (VIN = 12V, TA = 25°C, unless otherwise specified)
Symbol Parameter Conditions Min Typ. Max Unit
VFB Feedback Voltage IOUT = 0.1A 0.784 0.8 0.816 V
IFB Feedback Bias Current IOUT = 0.1A - 0.1 0.5 µA
ISW Switch Current -- 2.5 - - A
ISSS Current Consumption
During Power Off VEN = 0V - 10 - µA
∆VOUT
/VOUT Line Regulation VIN = 5V~18V, IOUT = 0.2A - 1 2 %
∆VOUT
/VOUT Load Regulation IOUT = 0.1 to 1.5A - 1 2 %
fOSC Oscillation Frequency Measure waveform at SW pin 700 800 900 KHz
fOSC1 Frequency of Current Limit
or Short Circuit Protect Measure waveform at SW pin 40 - - KHz
VSH Evaluate oscillation at SW pin 2.0 - -
VSL EN Pin Input Voltage Evaluate oscillation stop at SW pin - - 0.8 V
ISH Ven = 2V -10 - 10 µA
ISL EN Pin Input Leakage
Current Ven = 0.8V -10 - 10 µA
TSS Soft-Start Time -- 0.3 2 5 ms
VIN = 5V, VFB = 0V - 110 150
RDSON Internal MOSFET Rdson VIN = 12V, VFB = 0V - 70 100 mΩ
Thermal shutdown 145
oC
Minimum Duty Cycle 6.5 %
θJA Thermal Resistance
Junction-to-Ambient SOP -8L (Note 3) 124 oC/W
θJC
T
hermal Resistance
Junction-to-Case SOP-8L (Note 3) 25 oC/W
Note: 3. Test con d it ion: Device mounted on 2oz copper, minimum recommended pad layout, FR-4 PCB.
AP5001
PWM CONT RO L 1. 5A S TE P -DOWN CONVERTER
AP5001 Rev. 1 5 of 9 OCTOBER 2007
www.diodes.com © Diodes Incorporated
Typical Application Circuit
U1
AP5001
1
2
3
4 5
6
7
8
FB
EN
COMP
VCC Output
Output
VSS
VSS
C8
0.1uF
C3
0.1uF
C6
0.1uF
C7
0.1uF
C1
330pF C4
22uF
D1
Dii 229
B230A
L1 10uH
1 2
R4
0.8~2K
R1
3.3K
VIN+12V
R2
1K
R5
100K VOUT = 3.3V
C2
22uF
ON/OFF
Note: 4. VOUT=VFB )
R2
R1
(1 +×
VOUT (V) R1 (KΩ) R2 (KΩ)
1 3.3K (1%) 11K (1%)
2.5 2.2K (1%) 1K (1%)
3.3 3.3K (1%) 1K (1%)
5 6.4K (1%)
1.2K (1%)
AP5001
PWM CONT RO L 1. 5A S TE P -DOWN CONVERTER
AP5001 Rev. 1 6 of 9 OCTOBER 2007
www.diodes.com © Diodes Incorporated
Typical Performance Characteristics
AP5001 Vin vs. Frequency
(Vout=3.3V; Iout=0.2A)
848
850
852
854
856
858
860
862
864
866
05101520
Vin(V)
Frequency(KHZ)
AP 5001 Vi n vs. FB
(V out=3.3V; Iout=0.2A)
0.8
0.802
0.804
0.806
0.808
0 5 10 15 20 25
Vin(V)
VFB(V)
AP 5 001 L in e Reg u lati o n
( Iout=0.2A)
3.43
3.435
3.44
3.445
3.45
3.455
3.46
0 5 10 15 20
Vin(V)
Vout(V)
AP 5 001 L o ad Reg u latio n
(Vin=12V)
3.42
3.43
3.44
3.45
3.46
00.511.52
Iout(A)
Vout(V)
AP 5001 Effic i ency
0
10
20
30
40
50
60
70
80
90
100
0 0.5 1 1.5Iout(A)
Efficiency(%)
Vout=5V
Vout=3.3V
AP5001
PWM CONT RO L 1. 5A S TE P -DOWN CONVERTER
AP5001 Rev. 1 7 of 9 OCTOBER 2007
www.diodes.com © Diodes Incorporated
Typical Performance Characteristics (Continued)
AP5001 Vout Ripple
(Vin=12V; Vout=5V; Iout=0.2A)
AP5001 Vout Ripple
(Vin=12V; Vout=5V; Iout=1.5A)
Test Circuit
A
FBVCC
VSS
EN
open
open
FBVCC
VSS
EN
+
-
Oscillation
OUTPUT OUTPUT
A
FB
VCC
VSS
EN
+
-+
-
V
OUTPUT
COMP COMP
COMP
Enable function test Feedback function test
Oper ation func tion tes t
1.2K
6.8K
22u
6.8K 1500p
AP5001
PWM CONT RO L 1. 5A S TE P -DOWN CONVERTER
AP5001 Rev. 1 8 of 9 OCTOBER 2007
www.diodes.com © Diodes Incorporated
Function Description
PWM Control
The AP5001 consists of DC/DC converters that employ a
pulse-width modulation (PWM) system.
In converters of the AP5001, the pulse width varies in a range
from 0 to 100%, according to the load current. The ripple voltage
produced by the switching can easily be removed through a filter
because the switching frequency remains constant. Therefore,
these converters provide a low-ripple power over broad ran ges of
input voltage and load current.
Under Voltage Lockout
The under voltage lockout circuit of the AP5001 assures that the
high-side MOSFET driver outputs remain in the off state
whenever the supply volta ge drops below 3 .3V. Normal operat ion
resumes once VCC rises above 3.5V.
RDS(ON) Current Limiting
The current limit threshold is setting by the internal circuit.
Marking Information
AP5001
(Top view)
YY XX
Part Number
Logo
Xth week: 01~52
Year: "07" = 2007
"08" = 2008
XG : Green
XInternal Code
8765
1234
~
Package Information (unit: mm)
1.27typ 0.3/0.5
7°~9°
4.80/5.30
3.70/4.10
5.79/6.20
0.20typ
7°~9°
3.70/4.10
0.38/1.27
0.08/0.25
Gauge Plane
0.254
Seating Plane
0.35max. 45°
Detail "A"
Detail "A"
1.30/1.50
1.75max.
Land Pattern Recommendation
0.78
6x-1.27
8x-1.0
5.1
8x-0.41
(Unit: mm)
AP5001
PWM CONT RO L 1. 5A S TE P -DOWN CONVERTER
AP5001 Rev. 1 9 of 9 OCTOBER 2007
www.diodes.com © Diodes Incorporated
IMPORTANT NOTICE
LIFE SUPPORT
Diodes Incorporated and its subsidiaries reserve the right to make modifications, enhancements, improvements, corrections or other changes without further
notice to any product herein. Diodes Incorporated does not assume any liability arising out of the application or use of any product described herein; neither
does it convey any license under its patent rights, nor the rights of others. The user of products in such applications shall assume all risks of such use and will
agree to hold Diodes Incorporated and all the companies whose products are represented on our website, harmless against all damages.
Diodes Incorporated products are not authorized for use as critical components in life support devices or systems without the expressed written approval of the
President of Diodes Incorporated.
