AP1507-33D5L-13 [DIODES]
150KHz, 3A PWM BUCK DC/DC CONVERTER; 为150KHz ， 3A PWM降压型DC / DC转换器
| 型号： | AP1507-33D5L-13 |
| 厂家： | 
DIODES INCORPORATED |
| 描述： | 150KHz, 3A PWM BUCK DC/DC CONVERTER |
| 文件： | 总10页 (文件大小：200K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
AP1507
150KHz, 3A PWM BUCK DC/DC CONVERTER
General Description
Features
The AP1507 is a monolithic IC designed for a step-down DC/DC
converter and is capable of driving a 3A load without an external
transistor. Due to reducing the number of external components,
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 the feedback
control have good line and load regulation without an external
design. Regarding the protected function, the thermal shutdown
is to prevent over temperature operating from damaging the
device, and current limit is against over current operating of the
output switch. If the current limit function occurred and VFB is
down to 0.5V below, the switching frequency will be reduced. The
AP1507 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 included a fixed 3.3V,
5V, 12V, and an adjustable type. AP1507 is available in a 5-lead
TO-252 lead-free package.
•
•
Output Voltage: 3.3V, 5V, 12V and Adjustable Output
Version
Adjustable Version Output Voltage Range, 1.23V to
18V+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 22V
Output Load Current: 3A
Lead Free Package: TO252-5L
Low Power Standby Mode
Built-in Switching Transistor On Chip
Lead Free Package: TO252-5L
Lead Free Finish/RoHS Compliant (Note 1)
•
•
•
•
•
•
•
Applications
•
•
•
Simple High-Efficiency Step-Down Regulator
On-Card Switching Regulators
Positive to Negative Converter
Ordering Information
AP1507 - XX X X X
Package
Lead Free
Output Version
Packing
L : Lead Free
D5: TO252-5L
Blank : Adjustable
33 : 3.3V
-U : Tube
-13 : Taping
50 : 5.0V
12 : 12V
Note:
1. RoHS revision 13.2.2003. Glass and High Temperature Solder Exemptions Applied, see EU Directive Annex Notes 5 and 7.
Tube/Bulk
13” Tape and Reel
Package Packaging
Device
Part Number
Part Number
Code
(Note 2)
Quantity
Quantity
Suffix
Suffix
AP1507-XXD5
D5
TO252-5L
80
-U
2500/Tape & Reel
-13
Lead-free
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.
AP1507 Rev. 1
1 of 10
FEBRUARY 2007
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© Diodes Incorporated
AP1507
150KHz, 3A PWM BUCK DC/DC CONVERTER
Pin Descriptions
Pin Assignments
Name
Description
(Top View)
VIN
Output
GND
FB
Operating Voltage Input
Switching Output
5 SD
4 FB
3 GND
2 Output
1 VIN
Ground
Output Voltage Feedback Control
SD
ON/OFF Shutdown
Metal Tab GND
TO252-5L
Block Diagram
SD
VIN
200mV
220mV
Current
Source
Bias
1.235V
2.5V
Regulator
Start
Up
Reference
+
Comp
_
_
Comp
+
Frequency
Compen-
sation
+
_
Amp
3A
Switch
Pre-
Driver
_
Comp
+
FB
Output
GND
150kHz
OSC.
Thermal
Shutdown
AP1507 Rev. 1
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FEBRUARY 2007
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AP1507
150KHz, 3A PWM BUCK DC/DC CONVERTER
Absolute Maximum Ratings
Symbol
VCC
Parameter
Rating
+24
Unit
V
Supply Voltage
VSD
-0.3 to +18
-0.3 to +18
-1
V
ON/OFF Pin Input Voltage
Feedback Pin Voltage
Output Voltage to Ground
Power Dissipation
VFB
V
VOUT
PD
V
Internally Limited
-65 to +150
-40 to +125
+4.5 to +22
W
oC
oC
V
TST
Storage Temperature
Operating Temperature
Operating Voltage
TOP
VOP
Electrical Characteristics (All Output Voltage Versions)
Unless otherwise specified, VIN = 12V for 3.3V, 5V, adjustable version and VIN = 18V 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.
Max.
Unit
-50
-100
173
173
IFB
Feedback Bias Current
-10
nA
127
110
150
FOSC
FSCP
Oscillator Frequency
KHz
KHz
When current limit Occurred
and VFB < 0.5V, Ta = 25 oC
Oscillator Frequency of
Short Circuit Protect
10
30
50
1.6
1.7
I
OUT = 3A
No Outside Circuit
FB = 0V Force Driver On
VSAT
DC
ICL
Saturation Voltage
1.4
V
%
A
V
Max. Duty Cycle (ON)
Min. Duty Cycle (OFF)
VFB = 0V Force Driver On
VFB = 12V Force Driver Off
Peak Current
100
0
5.5
6.5
Current Limit
No Outside Circuit
3.6
4.5
VFB = 0V Force Driver On
Output No Outside Circuit
leakage VFB =12V Force Driver Off
Output = 0V
-200
uA
ILEAK
current
Quiescent Current
Output = -1V
VIN = 22V
VFB = 12V Force Driver Off
-5
5
mA
mA
IQ
10
150
Standby Quiescent
Current
ON/OFF Pin = 5V
VIN = 22V
Low (Regulator ON)
ISTBY
70
uA
V
200
0.6
-
VIL
VIH
-
ON/OFF Pin Logic Input
Threshold Voltage
1.3
High (Regulator OFF)
VLOGIC = 2.5V (OFF)
VLOGIC = 0.5V (ON)
2.0
ON/OFF Pin Logic Input
Current
IH
-0.01
-1
uA
IL
-0.1
10
ON/OFF Pin Input Current
Thermal Resistance
Junction to
TO252-5L
ΘJC
oC/W
oC/W
Case
Thermal Resistance
with copper area of
approximately 2cm ×2cm
Junction to
TO252-5L
ΘJA
50
Ambient
AP1507 Rev. 1
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FEBRUARY 2007
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AP1507
150KHz, 3A 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
Parameter
Conditions
VMin
Typ
VMax
Unit
5V < VIN < 22V
0.2A < ILOAD < 3A
VOUT Programmed for
3V
Output
Feedback
1.193
1.18
1.267
1.28
VFB
1.23
V
AP1507-ADJ
η
Efficiency
VIN = 12V, ILOAD = 3A
74
3.3
75
5
%
V
Output
Voltage
5.5V < VIN < 22V
0.2A < ILOAD < 3A
3.168
3.135
3.432
3.465
VOUT
AP1507-3.3V
AP1507-5V
AP1507-12V
η
Efficiency
VIN = 12V, ILOAD = 3A
%
V
Output
Voltage
8V < VIN < 22V
0.2A < ILOAD < 3A
4.8
4.75
5.2
5.25
VOUT
η
Efficiency
VIN = 12V, ILOAD = 3A
80
12
89
%
V
Output
Voltage
15V < VIN < 22V
0.2A < ILOAD < 3A
11.52
11.4
12.48
12.6
VOUT
η
Efficiency
VIN = 16V, ILOAD = 3A
%
AP1507 Rev. 1
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AP1507
150KHz, 3A PWM BUCK DC/DC CONVERTER
Typical Performance Characteristics
AP1507 Efficiency vs. Temperature
(Vin = 12V, Vout = 5V, Io = 3A)
AP1507 Efficiency vs. Temperature
(Vin = 12V, Vout = 3.3V, Io = 3A)
78
83
82
81
80
79
78
77
76
75
74
73
72
77
76
75
74
73
72
71
70
-50 -30 -10 10 30 50 70 90 110 130 150
Temperature (TA) (°C)
-50 -30 -10 10 30 50 70 90 110 130 150
Temperature (TA) (°C)
AP1507 Saturation Voltage vs. Temperature
(Vcc = 12V, Vfb = 0V, VSD = 0)
AP1507 Switch Current Limit vs. Temperature
(Vcc = 12V, Vfb = 0V)
1.6
1.5
5.5
5
3A
1.4
1.3
2A
4.5
4
1.2
1A
1.1
0.5A
1
0.9
0.8
0.7
3.5
3
-50
-30
-10
10
30
50
70
90
-50
-25
0
25
50
75
100
125
Temperature (TA)ꢀ(°C)
Temperature (TA) (°C)
AP1507 Supply Current vs. Temperature
(Vcc = 12V, No Load, Von/off = 0V (Switch ON), Von/off = 5V (Switch OFF))
15
60
55
50
14
13
12
11
10
9
8
7
6
5
45
40
35
30
Switch OFF
Switch ON
-50 -30 -10 10 30 50 70 90 110 130 150
Temperature (TA) (°C)
-50 -30 -10 10 30 50 70 90 110 130 150
Temperature (TA) (°C)
AP1507 Rev. 1
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FEBRUARY 2007
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AP1507
150KHz, 3A PWM BUCK DC/DC CONVERTER
Typical Performance Characteristics (Continued)
AP1507 Threshold Voltage vs. Temperature
(Vcc = 12V, Io = 100mA)
AP1507 ON/OFF Current vs. ON/OFF Voltage
(Vin= 12V)
1.7
1.6
1.5
1.4
1.3
1.2
1.1
1
10
0
-10
-20
-30
-40
-50
-60
-70
-80
-90
-100
0.9
0.8
0
3
6
9
12
15
18
21
-50 -30 -10 10 30 50 70 90 110 130 150
Temperature (TA) (°C)
ON/OFF Voltage (V)
AP1507 Frequency vs. Temperature
(Vcc = 12V, Io = 500mA, Vout = 5V)
AP1507 Feedback Current vs. Temperature
(Vcc = 12V, Vout = 5V, Vfb = 1.3V)
170
165
160
155
150
145
140
10
0
-10
-20
-30
-40
-50
-50 -30 -10 10 30 50 70 90 110 130 150
Temperature (TA) (°C)
-50 -30 -10 10 30 50 70 90 110 130 150
Temperature (TA) (°C)
AP1507 Output Voltage vs. Temperature
(Vin = 12V, Io = 3A)
3.5
3.45
3.4
3.35
3.3
3.25
3.2
3.15
3.1
3.05
3
2.95
2.9
-40 -20
0
20 40 60 80 100 120 140 160
Temperature (TA) (°C)
AP1507 Rev. 1
6 of 10
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© Diodes Incorporated
AP1507
150KHz, 3A PWM BUCK DC/DC CONVERTER
Typical Application Circuit
(1) Fixed Type Circuit
FB
12V
DC Input
L1
33uH
4
3.3V/3A
Output Load
Output
AP1507
-33
1
2
Inductor
Vin
5
3
D1
Schottky
Diode
SD
GND
Co
Cin
Capacitor
Capacitor
(2) Adjustable Type Circuit
R1
R2
FB
L1
47uH
12V
DC Input
4
5V/ 3A
Output Load
Output
1
AP1507
2
Vin
5
3
SD
GND
Co
Capacitor
Cin
Capacitor
D1
Schottky Diode
R1
R2
Vout = VFB × (1 +
)
VFB = 1.23V
R2 = 1K ~ 3K
(3) Delay Start Circuit
R2
R1
FB
L1
47uH
12V
DC Input
4
5V/ 3A
Output Load
Output
1
AP1507
2
Vin
CDELAY
0.1uF
5
3
SD
GND
Co
Capacitor
Cin
Capacitor
D1
RDELAY
10K
Schottky Diode
AP1507 Rev. 1
7 of 10
FEBRUARY 2007
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© Diodes Incorporated
AP1507
150KHz, 3A PWM BUCK DC/DC CONVERTER
Applications Information
Pin Functions
+VIN
The AP1507 (TO-252 package) junction temperature rises above
ambient temperature with a 3A 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
there are many factors that can affect the junction temperature.
When load currents higher than 3A are used, double sided or
multi-layer PC boards with large copper areas and/or airflow
might be needed, especially for high ambient temperatures and
high output voltages.
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
Internal switch. The voltage at this pin switches between (+VIN
SAT) and approximately – 0.5V, with a duty cycle of
approximately VOUT / VIN. To minimize coupling to sensitive
–
V
For the best thermal performance, wide copper traces and
generous amounts of printed circuit board copper should be used
in the board layout. (One 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.
circuitry, the PC board copper area connected to this pin should
be kept at a minimum.
Feedback (FB)
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, multi-layer 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. 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.
ON/OFF (SD)
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 18V) shuts the regulator down.
If this shutdown feature is not needed, the
wired to the ground pin.
/OFF pin can be
ON
Thermal Considerations
The TO-252 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 which improves the
thermal characteristics. With copper areas greater than
approximately 6 in2, only small improvements in heat dissipation
are realized. If further thermal improvements are needed, double
sided, multi-layer PC board with large copper areas and/or airflow
will be recommended.
AP1507 Rev. 1
8 of 10
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FEBRUARY 2007
© Diodes Incorporated
AP1507
150KHz, 3A PWM BUCK DC/DC CONVERTER
Marking Information
TO252-5L
(Top view)
Part Number
Output Type:
Blank: Adjustable
33: 3.3V
50: 5.0V
12: 12V
Logo
L: Lead Free Package
1507 - XX
X X X X X X
ID Code
Xth Week:01~52
Year: "01" = 2001
"02" = 2002
Package Information ( in mm )
Package Type: TO252-5L
AP1507 Rev. 1
9 of 10
FEBRUARY 2007
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© Diodes Incorporated
AP1507
150KHz, 3A PWM BUCK DC/DC CONVERTER
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 DiodesIncorporatedand all the companieswhose productsare represented onour website, harmlessagainst all damages.
LIFE SUPPORT
Diodes Incorporated productsare notauthorizedfor use ascriticalcomponentsin lifesupportdevices or systemswithout theexpressed written approval ofthe
PresidentofDiodesIncorporated.
AP1507 Rev. 1
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FEBRUARY 2007
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