AP1507-12D5LU [DIODES]
SWITCHING REGULATOR;
| 型号： | AP1507-12D5LU |
| 厂家： | 
DIODES INCORPORATED |
| 描述： | SWITCHING REGULATOR 开关 |
| 文件： | 总12页 (文件大小：125K) |
| 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
Description
Pin Assignments
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 or green package.
(Top View)
5 SD
4 FB
3 GND
2 Output
1 VIN
Metal Tab GND
TO252-5L
Applications
Features
•
•
•
Simple High-Efficiency Step-Down Regulator
On-Card Switching Regulators
•
•
•
•
•
•
•
•
•
•
•
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
Positive to Negative Converter
Operating Voltage can be up to 22V
Output Load Current: 3A
Low Power Standby Mode
Built-in Switching Transistor On Chip
AP1507-XXD5L-XX
Totally Lead-Free; RoHS Compliant (Notes 1 & 2)
•
AP1507-XXD5-XX
Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2)
Halogen and Antimony Free. “Green” Device (Note 3)
Notes:
1. No purposely added lead. Fully EU Directive 2002/95/EC (RoHS) & 2011/65/EU (RoHS 2) compliant.
2. See http://www.diodes.com for 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.
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May 2012
© Diodes Incorporated
AP1507
Document number: DS31067 Rev. 3 - 2
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
V
OUT = VFB × (1 +
)
R2
V
FB = 1.23V, R2 = 1K ~ 3K
(3) Delay Start Circuit
R2
R1
FB
L1
47uH
12V
DC Input
4
5V/ 3A
Output Load
Output
2
1
AP1507
Vin
CDELAY
0.1uF
5
3
SD
GND
Co
Capacitor
Cin
Capacitor
D1
Schottky Diode
RDELAY
10K
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May 2012
© Diodes Incorporated
AP1507
Document number: DS31067 Rev. 3 - 2
AP1507
150KHz, 3A PWM BUCK DC/DC CONVERTER
Pin Descriptions
Pin Number
Pin Name
Description
Operating Voltage Input
VIN
Output
GND
FB
1
2
3
4
Switching Output
Ground
Output Voltage Feedback Control
ON / OFF Shutdown
5
SD
Functional 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
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May 2012
© Diodes Incorporated
AP1507
Document number: DS31067 Rev. 3 - 2
AP1507
150KHz, 3A PWM BUCK DC/DC CONVERTER
Absolute Maximum Ratings (TA = 25°C) (Note4)
Symbol
ESD HBM
ESD MM
VCC
Parameter
Human Body Model ESD Protection
Machine Model ESD Protection
Supply Voltage
Rating
2
Unit
KV
V
200
+24
V
VSD
ON/OFF Pin Input Voltage
Feedback Pin Voltage
-0.3 to +18
-0.3 to +18
-1
V
VFB
V
VOUT
PD
Output Voltage to Ground
Power Dissipation
V
Internally Limited
-65 to +150
-40 to +125
W
oC
oC
TST
Storage Temperature
TJ
Operating Junction Temperature
Note:
4. Stresses greater than the 'Absolute Maximum Ratings' specified above, may cause permanent damage to the device. These are stress ratings
only; functional operation of the device at these or any other conditions exceeding those indicated in this specification is not implied. Device
reliability may be affected by exposure to absolute maximum rating conditions for extended periods of time.
Recommended Operating Conditions (TA = 25°C)
Symbol
IOUT
Parameter
Min
0
Max
3
Unit
A
Output Current
VOP
Operating Voltage
4.5
-20
22
V
oC
TA
Operating Ambient Temperature
+85
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© Diodes Incorporated
AP1507
Document number: DS31067 Rev. 3 - 2
AP1507
150KHz, 3A PWM BUCK DC/DC CONVERTER
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 = 25°C.
Symbol
Parameter
Conditions
Min
Typ
Max
-50
Unit
VFB = 1.3V
IFB
Feedback Bias Current
-10
nA
( Adjustable Version Only )
-100
173
173
127
150
FOSC
Oscillator Frequency
KHz
KHz
110
Oscillator Frequency of Short
Circuit Protect
When current limit Occurred and
VFB < 0.5V, TA = 25oC
FSCP
10
30
50
1.6
1.7
IOUT = 3A
VSAT
DC
Saturation Voltage
No Outside Circuit
VFB = 0V Force Driver On
1.4
V
%
A
V
V
FB = 0V Force Driver On
FB = 12V Force Driver Off
Max. Duty Cycle (ON)
Min. Duty Cycle (OFF)
100
0
Peak Current
5.5
6.5
ICL
No Outside Circuit
Current Limit
3.6
4.5
V
FB = 0V Force Driver On
No Outside Circuit
Output
Output = 0V
-200
µA
V
V
FB =12V Force Driver Off
IN = 22V
ILEAK
leakage
current
Output = -1V
-5
5
mA
mA
IQ
VFB = 12V Force Driver Off
ON/OFF Pin = 5V
Quiescent Current
10
150
200
0.6
-
Standby Quiescent
Current
ISTBY
70
µA
V
V
IN = 22V
VIL
VIH
IH
Low (Regulator ON)
High (Regulator OFF)
VLOGIC = 2.5V (OFF)
VLOGIC = 0.5V (ON)
-
ON/OFF Pin Logic Input Threshold
Voltage
1.3
2.0
ON/OFF Pin Logic Input Current
ON/OFF Pin Input Current
Thermal Resistance
-0.01
-1
µA
IL
-0.1
10
oC/W
θJA
TO252-5L
Junction to Case
Thermal Resistance
with copper area of approximately
2cm ×2cm
Junction to
Ambient
oC/W
θJC
TO252-5L
50
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May 2012
© Diodes Incorporated
AP1507
Document number: DS31067 Rev. 3 - 2
AP1507
150KHz, 3A PWM BUCK DC/DC CONVERTER
Electrical Characteristics (All Output Voltage Versions)
Specifications with boldface type are for full operating temperature range, the other type are for TJ = 25ºC.
VMIN
VMAX
Symbol
Parameter
Conditions
5V < VIN < 22V
Typ.
Unit
1.193
1.267
VFB
0.2A < ILOAD < 3A
Output Feedback
1.23
V
1.18
1.28
AP1507-ADJ
VOUT Programmed for 3V
V
IN = 12V, ILOAD = 3A
η
VOUT
η
Efficiency
Output Voltage
Efficiency
74
3.3
75
5
%
V
5.5V < VIN < 22V
0.2A < ILOAD < 3A
3.168
3.432
3.135
3.465
AP1507-3.3V
AP1507-5V
AP1507-12V
V
IN = 12V, ILOAD = 3A
%
V
8V < VIN < 22V
4.8
5.2
VOUT
η
VOUT
η
Output Voltage
Efficiency
0.2A < ILOAD < 3A
4.75
5.25
V
IN = 12V, ILOAD = 3A
80
12
89
%
V
15V < VIN < 22V
0.2A < ILOAD < 3A
11.52
12.48
Output Voltage
Efficiency
11.4
12.6
V
IN = 16V, ILOAD = 3A
%
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May 2012
© Diodes Incorporated
AP1507
Document number: DS31067 Rev. 3 - 2
AP1507
150KHz, 3A PWM BUCK DC/DC CONVERTER
Typical Characteristics
83
82
81
78
77
76
75
80
79
78
74
77
76
75
73
72
V
V
I
= 12V
= 5V
V
V
I
= 12V
IN
IN
OUT
74
73
72
= 3.3V
= 3A
OUT
71
70
= 3A
O
O
-50 -30 -10 10 30 50 70 90 110 130 150
-50 -30 -10 10 30 50 70 90 110 130 150
TEMPERATURE (°C)
Efficiency vs. Temperature
TEMPERATURE (°C)
Efficiency vs. Temperature
1.6
1.6
V
V
= 12V
= 0V
CC
FB
1.5
1.4
3A
1.4
1.2
1.1
0.9
1.3
2A
1A
1.2
1.1
1
0.5A
0.9
0.8
0.7
V
V
V
= 12V
= 0V
CC
FB
SD
= 0V
0.7
-50 -25
0
25
50
75 100 125
-50 -25
0
25
50
75 100 125
TEMPERATURE (°C)
Switch Current Limit vs. Temperature
TEMPERATURE (°C)
Saturation Voltage vs. Temperature
15
14
60
55
50
V
= 12V
CC
No Load
= 0V
V
ON
13
12
Switch ON
11
10
45
40
09
08
V
= 12V
CC
No Load
= 5V
07
06
35
V
OFF
Switch OFF
05
30
-50 -30 -10 10 30 50 70 90 110 130 150
-50 -30 -10 10 30 50 70 90 110 130 150
TEMPERATURE (°C)
TEMPERATURE (°C)
Supply Current vs. Temperature
Supply Current vs. Temperature
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© Diodes Incorporated
AP1507
Document number: DS31067 Rev. 3 - 2
AP1507
150KHz, 3A PWM BUCK DC/DC CONVERTER
Typical Characteristics (cont.)
1.7
1.6
1.5
10
0
V
I
= 12V
CC
= 100mA
O
-10
-20
-30
1.4
1.3
-40
-50
-60
-70
-80
1.2
1.1
1.0
0.9
0.8
V
= 12V
IN
-90
-100
0
3
6
9
12
15
18
21
-50 -30 -10 10 30 50 70 90 110 130 150
ON/OFF VOLTAGE (V)
TEMPERATURE (°C)
Threshold Voltage vs. Temperature
ON/OFF Current vs. ON/OFF Voltage
170
10
V
= 12V
CC
V
I
= 12V
CC
VOUT = 5V
= 1.3V
= 500mA
= 5V
O
165
160
155
150
0
V
FB
V
OUT
-10
-20
-30
-40
-50
145
140
-50 -30 -10 10 30 50 70 90 110 130 150
-50 -30 -10 10 30 50 70 90 110 130 150
TEMPERATURE (°C)
TEMPERATURE (°C)
Frequency vs. Temperature
Feedback Current vs. Temperature
3.5
3.45
3.4
3.35
3.3
3.25
3.2
3.15
3.1
3.05
3.0
2.95
2.9
V
I
= 12V
IN
= 3A
O
-40 -2
0
20 40 60 80 100 120 140 160
TEMPERATURE (°C)
Output Voltage vs. Temperature
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© Diodes Incorporated
AP1507
Document number: DS31067 Rev. 3 - 2
AP1507
150KHz, 3A PWM BUCK DC/DC CONVERTER
Application Information
Pin Functions
+VIN
than approximately 6in2, 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.
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.
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.
Ground
Circuit ground.
Output
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 at a minimum.
Feedback (FB)
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.
Senses the regulated output voltage to complete the feedback
loop.
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 ON/OFF pin can be
wired to the ground pin.
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.
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
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© Diodes Incorporated
AP1507
Document number: DS31067 Rev. 3 - 2
AP1507
150KHz, 3A PWM BUCK DC/DC CONVERTER
Ordering Information
AP1507 - XX XX X X
Package
Lead Free
Packing
-U : Tube
Output Version
L : Lead Free
Blank : Green
Blank : Adjustable D5 : TO252-5L
33 : 3.3V
50 : 5.0V
12 : 12V
-13 : Tape & Reel
Tube/Bulk
13” Tape and Reel
Packaging
Device
Package Code
Part Number
(Note 5)
Quantity
Quantity
Part Number Suffix
Suffix
Pb
Lead-Free
AP1507-XXD5L-XX
AP1507-XXD5-XX
D5
D5
TO252-5L
TO252-5L
80
-U
2500/Tape & Reel
2500/Tape & Reel
-13
-13
Not available
Note:
5. 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
Marking Information
(1) TO252-5L
( Top view )
Logo
Internal code
Output Type :
Blank : Adjustable
1507-33 : 3.3V
1507-50 : 5.0V
1507-12 : 12V
1507 - XX
YY WW X X
L : Lead Free
Blank : Green
Xth Week : 01~52
Year :"07" = 2007
"08" = 2008
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May 2012
© Diodes Incorporated
AP1507
Document number: DS31067 Rev. 3 - 2
AP1507
150KHz, 3A PWM BUCK DC/DC CONVERTER
Package Outline Dimensions (All Dimensions in mm)
Package Type: TO252-5L
TO252-5L
Dim Min Max Typ
A
2.19 2.39 2.29
A1 0.00 0.13 0.08
A2 0.97 1.17 1.07
E
A
b3
c2
b
0.51 0.71 0.583
L3
D
b2 0.61 0.79 0.70
b3 5.21 5.46 5.33
c2 0.45 0.58 0.531
E1
A2
D
6.00 6.20 6.10
H
D1 5.21
−
−
−
e
1.27
−
E
6.45 6.70 6.58
A1
E1 4.32
−
−
L
H
L
9.40 10.41 9.91
1.40 1.78 1.59
e
5X b2
5X b
a
L3 0.88 1.27 1.08
0° 10°
a
−
All Dimensions in mm
Suggested Pad Layout
Package Type: TO252-5L
Dimensions Value (in mm)
X
X
5.6
0.6
X1
Y
Y1
11.0
5.6
Y1
Y2
C1
C2
2.0
Y
C1
7.2
1.27
Y2
X1
C2
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© Diodes Incorporated
AP1507
Document number: DS31067 Rev. 3 - 2
AP1507
150KHz, 3A PWM BUCK DC/DC CONVERTER
IMPORTANT NOTICE
DIODES INCORPORATED MAKES NO WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, WITH REGARDS TO THIS
DOCUMENT, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
PARTICULAR PURPOSE (AND THEIR EQUIVALENTS UNDER THE LAWS OF ANY JURISDICTION).
Diodes Incorporated and its subsidiaries reserve the right to make modifications, enhancements, improvements, corrections or other
changes without further notice to this document and any product described herein. Diodes Incorporated does not assume any liability
arising out of the application or use of this document or any product described herein; neither does Diodes Incorporated convey any
license under its patent or trademark rights, nor the rights of others. Any Customer or user of this document or products described
herein 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 Diodes Incorporated website, harmless against all damages.
Diodes Incorporated does not warrant or accept any liability whatsoever in respect of any products purchased through unauthorized
sales channel.
Should Customers purchase or use Diodes Incorporated products for any unintended or unauthorized application, Customers shall
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arising out of, directly or indirectly, any claim of personal injury or death associated with such unintended or unauthorized application.
Products described herein may be covered by one or more United States, international or foreign patents pending. Product names
and markings noted herein may also be covered by one or more United States, international or foreign trademarks.
LIFE SUPPORT
Diodes Incorporated products are specifically not authorized for use as critical components in life support devices or systems without
the express written approval of the Chief Executive Officer of Diodes Incorporated. As used herein:
A. Life support devices or systems are devices or systems which:
1. are intended to implant into the body, or
2. support or sustain life and whose failure to perform when properly used in accordance with instructions for use provided
in the labeling can be reasonably expected to result in significant injury to the user.
B. A critical component is any component in a life support device or system whose failure to perform can be reasonably expected
to cause the failure of the life support device or to affect its safety or effectiveness.
Customers represent that they have all necessary expertise in the safety and regulatory ramifications of their life support devices or
systems, and acknowledge and agree that they are solely responsible for all legal, regulatory and safety-related requirements
concerning their products and any use of Diodes Incorporated products in such safety-critical, life support devices or systems,
notwithstanding any devices- or systems-related information or support that may be provided by Diodes Incorporated. Further,
Customers must fully indemnify Diodes Incorporated and its representatives against any damages arising out of the use of Diodes
Incorporated products in such safety-critical, life support devices or systems.
Copyright © 2012, Diodes Incorporated
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© Diodes Incorporated
AP1507
Document number: DS31067 Rev. 3 - 2
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