AP1501A-12K5L-13 [DIODES]
150KHz, 5A PWM BUCK DC/DC CONVERTER; -40℃-85℃ ， 5A PWM降压型DC / DC转换器
| 型号： | AP1501A-12K5L-13 |
| 厂家： | 
DIODES INCORPORATED |
| 描述： | 150KHz, 5A PWM BUCK DC/DC CONVERTER |
| 文件： | 总12页 (文件大小：238K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
AP1501A
150KHz, 5A PWM BUCK DC/DC CONVERTER
General Description
Features
The AP1501A series are monolithic ICs that are designed for a
step-down DC/DC converter, and possess the ability to drive a
5A load without additional transistor component. Due to reducing
the number of external component, the board space can be
saved easily. The external shutdown function can be controlled
by logic level and then come into standby mode. The internal
compensation makes feedback control have good line and load
regulation without external design. Regarding protected function,
thermal shutdown is to prevent over temperature operating from
damage, and current limit is against over current operating of the
output switch. The AP1501A series operates at a switching
frequency of 150Khz thus allowing smaller sized filter
components than what would be needed with lower frequency
switching regulators. Other features include a guaranteed +4%
tolerance on output voltage under specified input voltage and
output load conditions, and +15% on the oscillator frequency.
The output version includes fixed 3.3V, 5V, 12V, and an
adjustable type. The packages are available in a standard 5-lead
TO263 and TO220 packages.
•
•
Output voltage: 3.3V, 5V, 12V and adjustable output
version
Adjustable version output voltage range, 1.23V to
37V+4%
150Khz +15% fixed switching frequency
Voltage mode non-synchronous PWM control
Thermal-shutdown and current-limit protection
ON/OFF shutdown control input
Operating voltage can be up to 40V
Output load current: 5A
•
•
•
•
•
•
•
•
•
•
Low power standby mode
Built-in switching transistor on chip
Lead Free packages: TO263-5L and TO220-5L(R)
TO263-5L: Available in “Green” Molding Compound
(No Br, Sb)
•
Lead Free Finish/RoHS Compliant (Note 1)
Applications
•
•
•
Simple High-efficiency step-down regulator
On-card switching regulators
Positive to negative converter
Ordering Information
AP1501A - XX XXX X - X
Lead Free
Packing
U : Tube
13 : Tape & Reel
Package
Output Version
L : Lead Free
G : Green
K5 : TO263-5L
T5 : TO220-5L
Blank : Adjustable
33 : 3.3V
T5R : TO220-5L(R)
50 : 5.0V
12 : 12V
Tube
Part Number
13” Tape and Reel
Package Packaging
Device
Part Number
Quantity
Quantity
Code
(Note 2)
Suffix
-U
NA
-U
NA
-U
-U
Suffix
AP1501A-XXK5L-U
AP1501A-XXK5L-13
AP1501A-XXK5G-U
AP1501A-XXK5G-13
AP1501A-XXT5L-U
AP1501A-XXT5RL-U
K5
K5
K5
K5
T5
TO263-5L
TO263-5L
TO263-5L
TO263-5L
TO220-5L
TO220-5L(R)
50
NA
50
NA
50
NA
NA
-13
NA
-13
NA
NA
Lead-free
Lead-free
800/Tape & Reel
NA
800/Tape & Reel
NA
NA
Lead-free
Lead-free
T5R
50
Notes:
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.
AP1501A Rev. 7
1 of 12
SEPTEMBER 2008
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AP1501A
150KHz, 5A PWM BUCK DC/DC CONVERTER
Pin Assignments
( Top View )
( Top View )
5 SD
4 FB
3 Gnd
2 Output
1 VIN
5 SD
4 FB
3 Gnd
2 Output
1 VIN
Metal Tab GND
TO220-5L/TO220-5L(R)
TO263-5L
Pin Descriptions
Name
Description
VIN
Output
Gnd
FB
Operating voltage input
Switching output
Ground
Output voltage feedback control
ON/OFF shutdown
SD
AP1501A Rev. 7
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AP1501A
150KHz, 5A PWM BUCK DC/DC CONVERTER
Block Diagram
SD
VIN
200mV
220mV
Current
Source
bias
1.235V
Reference
2.5V
Regulator
Start
up
+
Comp
_
_
Comp
+
+
Freq.
Compensation
_
Amp
5A
Switch
_
Comp
Pre-driver
FB
+
Output
Gnd
150kHz
OSC.
Thermal
Shutdown
Absolute Maximum Ratings
Symbol
ESD MM
VCC
Parameter
Rating
400
Unit
Machine Model ESD Protection
Supply Voltage
V
V
+45
VSD
ON/OFF Pin input voltage
Feedback Pin voltage
Output voltage to Ground
Power dissipation
-0.3 to +40
-0.3 to +40
-1
V
VFB
V
VOUT
PD
V
Internally limited
-65 to +150
W
oC
oC
TST
Storage temperature
TJ
Operating Junction Temperature
-20 to +125
AP1501A Rev. 7
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AP1501A
150KHz, 5A PWM BUCK DC/DC CONVERTER
Recommended Operating Conditions
Symbol
VOP
Parameter
Operating voltage
Operating Ambient Temperature
Rating
4.5 to 40
-20 to 85
Units
V
oC
TA
Electrical Characteristics ( All Output Voltage Versions )
Unless otherwise specified, VIN = 12V for 3.3V, 5V, adjustable version and VIN = 24V for the 12V version. ILOAD = 0.5A
Specifications with boldface type are for full operating temperature range, the other type are for TJ = 25ºC.
Symbol
Parameter
Conditions
VFB = 1.3V
(Adjustable version only)
Min
Typ.
40
Max
60
100
173
173
1.6
Unit
IFB
Feedback Bias Current
nA
127
110
150
FOSC
VSAT
DC
ICL
Oscillator Frequency
Saturation Voltage
Khz
IOUT = 5A
1.5
V
%
A
no outside circuit
1.7
VFB = 0V force driver on
VFB = 0V force driver on
VFB = 12V force driver off
peak current
no outside circuit
VFB = 0 force driver on
Max. Duty Cycle(ON)
Min. Duty Cycle(OFF)
100
0
6.5
Current Limit
5.5
6.0
7.5
Output
no outside circuit
Output = 0V
200
uA
IL
Leakage VFB = 12 force driver off (Note 3)
Current
Output = -1V
VIN = 40V
2
5
60
10
250
300
mA
mA
IQ
Quiescent Current
Standby Quiescent
Current
VFB = 12 force driver off
ON/OFF pin = 5V
VIN = 40V
ISTBY
150
uA
VIL
VIH
Low (regulator ON)
0.6
ON/OFF Pin Logic Input
Threshold Voltage
1.3
V
High (regulator OFF)
2.0
ON/OFF Pin Logic
Input Current
ON/OFF Pin Input
Current
IH
IL
VLOGIC = 2.5V (OFF)
VLOGIC = 0.5V (ON)
TO263-5L (Note 4)
15
0.02
37
25
5
uA
Thermal Resistance
Junction-to-Ambient
θJA
oC/W
oC/W
TO220-5L(R) (Note 4)
31
TO263-5L (Note 4)
6
5
Thermal Resistance
Junction-to-Case
θJC
TO220-5L(R) (Note 4)
Notes:
3. Feedback pin removed from output and connected to 0V to force the output transistor switch ON. Feedback pin removed from output and
connected to 12V for the 3.3V, 5V, and the ADJ. version, and 15V for the 12V version, to force the output transistor switch OFF.
4. Test condition: Device mounted with copper area of approximately 3in2, 1oz, no air flow.
AP1501A Rev. 7
4 of 12
SEPTEMBER 2008
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© Diodes Incorporated
AP1501A
150KHz, 5A PWM BUCK DC/DC CONVERTER
Electrical Characteristics ( Continued )
Specifications with boldface type are for full operating temperature range, the other type are for TJ = 25ºC.
Symbol
VFB
Parameter
Conditions
5V < VIN < 40V
0.2A < ILOAD < 5A
VOUT programmed for 3V
Typ.
1.23
72
Limit
Unit
V
VMIN
VMAX
Output
Feedback
1.193/1.18
1.267/1.28
AP1501A-ADJ
AP1501A-3.3V
AP1501A-5V
AP1501A-12V
η
Efficiency
Output Voltage
Efficiency
VIN = 12V, ILOAD=5A
%
V
VMIN
VMAX
5.5V < VIN < 40V
0.2A < ILOAD < 5A
3.168/3.135
3.432/3.465
VOUT
3.3
71
η
VIN = 12V, ILOAD=5A
%
V
VMIN
VMAX
8V < VIN < 40V
0.2A < ILOAD < 5A
4.8/4.75
5.2/5.25
VOUT
Output Voltage
Efficiency
5
η
VIN = 12V, ILOAD = 5A
78
%
V
VMIN
VMAX
15V < VIN < 40V
0.2A < ILOAD < 5A
11.52/11.4
12.48/12.6
VOUT
Output Voltage
Efficiency
12
η
VIN = 16V, ILOAD = 5A
88
%
AP1501A Rev. 7
5 of 12
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© Diodes Incorporated
AP1501A
150KHz, 5A PWM BUCK DC/DC CONVERTER
Typical Performance Characteristics
Typical Performance Characteristics
Normalized Output Voltage
Efficiency
100
5.10
5.05
5.00
4.95
4.90
VIN =20V, ILOAD=3A
Normalized at TJ = 25°C
95
90
5A Load
85
80
75
70
65
5V
3.3V
-50 -25
0
25
50 75 100 125
30
INPUT VOLTAGE
40
8
10 15
20
25
35
JUNCTION TEMPERATURE(°C)
Switch Saturation Voltage
Switch Current Limit
7.5
7.0
6.5
6.0
5.5
1.7
1.6
1.5
1.4
1.3
1.2
1 : -40oC
VIN =12V, VOUT=5V
2 : 25oC
3 : 125oC
1
2
3
2.0
4
5
3
-50 -25
0
25 50 75 100 125
JUNCTION TEMPERATURE(°C)
SWITCH CURRENT(A)
Shutdown Quiescent Current
Operating Quiescent Current
200.0
160.0
120.0
80.0
40.0
0.0
25.0
20.0
15.0
10.0
5.0
Switch ON
1
2
VON/OFF=5V
1 : -40oC
3
Switch OFF
2 : 25 oC
3 : 125 oC
0.0
-50 -25
0
25
50 75 100 125
10
20
30
40
SUPPLY VOLTAGE (V)
JUNCTION TEMPERATURE(°C)
AP1501A Rev. 7
6 of 12
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AP1501A
150KHz, 5A PWM BUCK DC/DC CONVERTER
Typical Performance Characteristics (Continued)
ON/OFF Threshold Voltage
Minimum Operating Supply Voltage
5.0
4.0
3.0
2.0
1.0
0.0
5.0
4.0
3.0
2.0
1.0
0.0
VOUT=1.23V
ILOAD=120mA
-50
0
100 125
25 50 75
-25
-50 -25
0
25 50 75 100 125
JUNCTION TEMPERATURE (oC)
JUNCTION TEMPERATURE (oC)
Switch Frequency
ON/OFF Pin Current (Sinking)
200.0
150.0
100.0
50.0
150.0
VIN=40V
120.0
90.0
60.0
30.0
0.0
-40oC
T
125oC
≤
≤
J
0.0
-50 -25
0
25 50 75 100 125
1.4
5
10 15 20 22 23 24 25
JUNCTION TEMPERATURE (oC)
ON/OFF PIN VOLTAGE (V)
Feedback Pin Bias Current
50.0
40.0
30.0
20.0
10.0
0.0
Adjustable Version Only
-50 -25
0
25 50 75 100 125
JUNCTION TEMPERATURE(oC)
AP1501A Rev. 7
7 of 12
SEPTEMBER 2008
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© Diodes Incorporated
AP1501A
150KHz, 5A PWM BUCK DC/DC CONVERTER
Typical Application Circuit
(1) Fixed Type Circuit
FB
12V
DC Input
L1
18uH
4
3.3V/5A
Output Load
Output
AP1501A
-33
1
2
Vin
Inductor
5
3
D1
Schottky
Diode
SD
Gnd
Cin
Co
Capacitor
Capacitor
(2) Adjustable Type Circuit
R1
R2
FB
L1
22uH
12V
DC Input
4
5V/ 5A
Output Load
Output
1
AP1501A 2
Vin
5
SD
3
Gnd
Cin
Capacitor
Co
Capacitor
D1
Schottky Diode
R1
R2
Vout = VFB ×(1 +
)
VFB = 1.23V
R2 = 1K ~ 3K
(3) Delay Start Circuit
R2
R1
FB
4
L1
22uH
12V
DC Input
5V/ 5A
Output Load
Output
1
AP1501A 2
Vin
CDELAY
0.1uF
5
3
SD
RDELAY
10K
Gnd
Cin
Capacitor
Co
Capacitor
D1
Schottky Diode
AP1501A Rev. 7
8 of 12
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© Diodes Incorporated
AP1501A
150KHz, 5A PWM BUCK DC/DC CONVERTER
Functional Description
Pin Functions
+VIN
The AP1501A (TO-263 package) junction temperature rise above
ambient temperature with a 2A load for various input and output voltages.
This data was taken with the circuit operating as a buck switching
regulator with all components mounted on a PC board to simulate the
junction temperature under actual operating conditions. This curve can
be used for a quick check for the approximate junction temperature for
various conditions, but be aware that there are many factors that can
affect the junction temperature. When load currents higher than 3A are
used, double sided or multilayer PC boards with large copper areas
and/or airflow might be needed, especially for high ambient temperatures
This is the positive input supply for the IC switching regulator. A suitable
input bypass capacitor must be present at this pin to minimize voltage
transients and to supply the switching currents needed by the regulator.
Ground
Circuit ground.
Output
and high output voltages.
Internal switch. The voltage at this pin switches between (+VIN – VSAT
)
and approximately – 0.5V, with a duty cycle of approximately
VOUT / VIN. To minimize coupling to sensitive circuitry, the PC board
copper area connected to this pin should be kept a minimum.
For the best thermal performance, wide copper traces and generous
amounts of printed circuit board copper should be used in the board
layout. (Once exception to this is the output (switch) pin, which should not
have large areas of copper.) Large areas of copper provide the best
transfer of heat (lower thermal resistance) to the surrounding air, and
moving air lowers the thermal resistance even further.
Feedback
Senses the regulated output voltage to complete the feedback loop.
Package thermal resistance and junction temperature rise numbers are
all approximate, and there are many factors that will affect these
numbers. Some of these factors include board size, shape, thickness,
position, location, and even board temperature. Other factors are, trace
width, total printed circuit copper area, copper thickness, single or
double-sided, multilayer board and the amount of solder on the board.
The effectiveness of the PC board to dissipate heat also depends on the
size, quantity and spacing of other components on the board, as well as
whether the surrounding air is still or moving.
ON/OFF
Allows the switching regulator circuit to be shutdown using logic level
signals thus dropping the total input supply current to approximately
150uA. Pulling this pin below a threshold voltage of approximately
1.3V turns the regulator on, and pulling this pin above 1.3V (up to a
maximum of 40V) shuts the regulator down. If this shutdown feature is
not needed, the ON/OFF pin can be wired to the ground pin or it can be
left open, in either case the regulator will be in the ON condition.
Furthermore, some of these components such as the catch diode will
add heat to the PC board and the heat can vary as the input voltage
changes. For the inductor, depending on the physical size, type of core
material and the DC resistance, it could either act as a heat sink taking
heat away from the board, or it could add heat to the board.
Thermal Considerations
The AP1501A is available in two packages, a 5-pin surface mount
TO-263 and TO-220.
The TO-220 package needs a heat sink under most conditions. The size
of the heat sink depends on the input voltage, the output voltage, the
load current and the ambient temperature. The AP1501A junction
temperature rises above ambient temperature for a 5A load and different
input and output voltages. The data for these curves was taken with the
AP1501A (TO-220 package) operating as a buck switching regulator in
an ambient temperature of 25oC (still air). These temperature rise
numbers are all approximate and there are many factors that can affect
these temperatures. Higher ambient temperatures require more heat
sinking.
The TO-263 surface mount package tab is designed to be soldered to
the copper on a printed circuit board. The copper and the board are the
heat sink for this package and the other heat producing components,
such as the catch diode and inductor. The PC board copper area that
the package is soldered to should be at least 0.8 in2, and ideally should
have 2 or more square inches of 2 oz. Additional copper area improves
the thermal characteristics, but with copper areas greater than
approximately 6 in2, only small improvements in heat dissipation are
realized. If further thermal improvements are needed, double sided,
multilayer PC boards with large copper areas and/or airflow are
recommended.
AP1501A Rev. 7
9 of 12
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© Diodes Incorporated
AP1501A
150KHz, 5A PWM BUCK DC/DC CONVERTER
Marking Information
(1) TO263-5L
( Top View )
Logo
L : Lead Free
G : Green
ID code
Xth week : 01~52
Year : "07" = 2007
"08" = 2008
Output Type :
1501A : ADJ
1501A-33 : 3.3V
1501A-50 : 5.0V
1501A-12 : 12V
1501A XX
YY WW X X
(2) TO220-5L(R)
( Top view )
Output Type:
1501A : ADJ
Logo
1501A33 : 3.3V
1501A50 : 5.0V
1501A12 : 12V
1501AXX
YY WW X X
L : Lead Free Package
ID code
Xth week: 01~52
Year: "07" = 2007
"08" = 2008
AP1501A Rev. 7
10 of 12
SEPTEMBER 2008
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© Diodes Incorporated
AP1501A
150KHz, 5A PWM BUCK DC/DC CONVERTER
Package Information (All Dimensions in mm)
(1) Package Type: TO263-5L
(2) Package Type: TO220-5L
AP1501A Rev. 7
11 of 12
SEPTEMBER 2008
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© Diodes Incorporated
AP1501A
150KHz, 5A PWM BUCK DC/DC CONVERTER
Package Information (Continued)
(3) Package Type: TO220-5L(R) Mechanical drawing
IMPORTANT NOTICE
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
agreeto hold Diodes Incorporatedand all the companies whose productsare represented onour website, harmless against all damages.
LIFE SUPPORT
Diodes Incorporated products are notauthorizedfor use as criticalcomponents in lifesupportdevices or systemswithout theexpressed written approval ofthe
PresidentofDiodes Incorporated.
AP1501A Rev. 7
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SEPTEMBER 2008
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