AP1506-T5RL-13 [DIODES]
150KHz, 3A PWM BUCK DC/DC CONVERTER; 为150KHz ， 3A PWM降压型DC / DC转换器
| 型号： | AP1506-T5RL-13 |
| 厂家： | 
DIODES INCORPORATED |
| 描述： | 150KHz, 3A PWM BUCK DC/DC CONVERTER |
| 文件： | 总13页 (文件大小：226K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
AP1506
150KHz, 3A PWM BUCK DC/DC CONVERTER
General Description
Features
The AP1506 series are monolithic IC designed for a step-down
DC/DC converter, and own the ability of driving a 3A load without
external transistor. 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 to prevent over current operating of the output switch. If
current limit function occurred and VFB is down to 0.5V below, the
switching frequency will be reduced. The AP1506 series operate
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 fixed 3.3V, 5V,
12V, and an adjustable type. The packages are available in a
standard 5-lead TO-220 or a 5-lead TO-263.
•
•
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
TO220-5L, TO263-5L Packages
Low Power standby mode
•
•
•
•
•
•
Built-in Switching Transistor On Chip
Lead Free Finish/RoHS Compliant (Note 1)
Applications
•
•
•
Simple High-Efficiency Step-Down Regulator
On-Card Switching Regulators
Positive to Negative Converter
Ordering Information
XX
AP1506
X
X X
Package
Packing
Lead Free
Output Version
-U : Tube
Blank : Adjustable T5: TO220-5L
L : Lead Free Package
-13 : Taping
12 : 12V
33 : 3.3V
50 : 5.0V
K5: TO 263-5L
T5R: TO 220-5L(R)
Note: 1. RoHS revision 13.2.2003. Glass and High Temperature Solder Exemptions Applied, see EU Directive Annex Notes 5 and 7.
Tube
Quantity Part Number
Suffix
13” Tape and Reel
Package
Code
Device (Note 2)
Packaging
Quantity
Part Number
Suffix
-13
AP1506-XXK5
AP1506-XXT5
AP1506-XXT5R
K5
T5
T5R
TO263-5L
TO220-5L
TO220-5L(R)
NA
50
50
NA
-U
-U
800/Tape & Reel
Lead-free
Lead-free
Lead-free
NA
NA
NA
NA
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.
AP1506 Rev. 2
1 of 13
NOVEMBER 2006
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© Diodes Incorporated
AP1506
150KHz, 3A PWM BUCK DC/DC CONVERTER
Pin Descriptions
Pin Assignments
( Top View )
Name
VIN
Description
Operating Voltage Input
Switching Output
5 SD
4 FB
3 GND
2 Output
Output
GND
FB
1 V
IN
Metal Tab GND
TO263-5L
Ground
Output Voltage Feedback Control
( Top View )
SD
ON/OFF Shutdown
5 SD
4 FB
3 GND
2 Output
1 V
IN
TO220-5L
Block Diagram
SD
VIN
220mV
200mV
Current
Source
bias
1.235V
Reference
2.5V
Regulator
Start
up
+
Comp
-
-
Comp
+
Frequecy
compen-
sation
+
Amp
-
3A
Switch
-
Comp
+
Pre-driver
FB
Output
GND
Thermal
Shutdown
150KHz
OSC.
AP1506 Rev. 2
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© Diodes Incorporated
AP1506
150KHz, 3A PWM BUCK DC/DC CONVERTER
Absolute Maximum Ratings
Symbol
VCC
Parameter
Supply Voltage
Rating
+24
Unit
V
VSD
ON/OFF Pin Input Voltage
Feedback Pin Voltage
Output Voltage to Ground
Power Dissipation
-0.3 to +18
-0.3 to +18
-1
V
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
AP1506 Rev. 2
3 of 13
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© Diodes Incorporated
AP1506
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 = 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
IOUT = 3A
VSAT
DC
ICL
Saturation Voltage
-
1.4
V
%
No outside circuit
VFB = 0V force driver on
VFB = 0V force driver on
VFB = 12V force driver off
Peak current
Max. Duty Cycle (ON)
Min. Duty Cycle (OFF)
-
-
100
0
-
-
5.5
Current Limit
3.6
4.5
A
No outside circuit
6.5
V
FB = 0 force driver on
No outside circuit
VFB = 12 force driver off
Output
Output = 0V
-
-
-200
UA
IL
Leakage
Current
Quiescent Current
Output = -1V
VIN = 22V
VFB = 12 force driver off
-
-
-5
5
-
10
MA
MA
IQ
150
Standby Quiescent
Current
ON/OFF pin = 5V
VIN = 22V
Low (regulator ON)
ISTBY
-
70
1.3
-
UA
V
200
0.6
-
VIL
VIH
-
ON/OFF Pin Logic Input
Threshold Voltage
High (regulator OFF)
2.0
ON/OFF Pin Logic
Input Current
IH
IL
VLOGIC = 2.5V (OFF)
-
-
-0.01
-1
UA
ON/OFF Pin Input
Current
VLOGIC = 0.5V (ON)
-0.1
TO220-5L
TO263-5L
-
-
-
2.5
3.5
28
-
-
-
Thermal Resistance
Junction to Case
θJC
oC/W
oC/W
TO220-5L with a copper
area of
TO263-5L
Thermal Resistance
Junction to Ambient
θJA
approximately
-
23
-
3in2
AP1506 Rev. 2
4 of 13
NOVEMBER 2006
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AP1506
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.
1.23
-
VMax
.
Unit
5V < VIN < 22V
0.2A < ILOAD < 3A
OUT programmed
for 3V
VIN = 12V, ILOAD
3A
1.193
1.18
-
1.267
Output
Feedback
V
VFB
V
1.28
AP1506-ADJ
=
η
Efficiency
74
-
%
V
3.168
3.3
-
3.432
Output
Voltage
5.5V < VIN < 22V
0.2A < ILOAD < 3A
VOUT
3.465
3.135
AP1506-3.3V
AP1506-5V
AP1506-12V
VIN = 12V, ILOAD
3A
=
η
Efficiency
-
75
-
%
V
4.8
5
-
5.2
Output
Voltage
8V < VIN < 22V
0.2A < ILOAD < 3A
VOUT
5.25
4.75
VIN = 12V, ILOAD
3A
=
η
Efficiency
-
80
-
%
V
11.52
11.4
-
12
-
12.48
Output
Voltage
15V < VIN < 22V
0.2A < ILOAD < 3A
VOUT
12.6
VIN = 16V, ILOAD
3A
=
η
Efficiency
89
-
%
AP1506 Rev. 2
5 of 13
NOVEMBER 2006
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AP1506
150KHz, 3A PWM BUCK DC/DC CONVERTER
Typical Performance Characteristics
AP1506 Efficiency vs. Temperature
(Vin = 12V, Vout = 5V, Io = 3A)
AP1506 Efficiency vs. Temperature
(Vin = 12V, Vout = 3.3V, Io = 3A)
83
78
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
-50 -30 -10 10 30 50 70 90 110 130 150
Temperature (T ) (°C)
Temperature (T ) (°C)
A
A
AP1506 Saturation Voltage vs. Temperature
(Vcc = 12V, Vfb = 0V, VSD = 0)
AP1506 Switch Current Limit vs. Temperature
(Vcc = 12V, Vfb = 0V)
1.6
5.5
5
1.5
3A
1.4
1.3
1.2
1.1
1
2A
4.5
4
1A
0.5A
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 (T ) (°C)
ꢀ
Temperature (T ) (°C)
A
A
AP1506 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
Switch OFF
45
40
8
7
6
5
Sw itch ON
35
30
-50 -30 -10 10 30 50 70 90 110 130 150
Temperature (T ) (°C)
-50 -30 -10 10 30 50 70 90 110 130 150
Temperature (T ) (°C)
A
A
AP1506 Rev. 2
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AP1506
150KHz, 3A PWM BUCK DC/DC CONVERTER
Typical Performance Characteristics (Continued)
AP1506 Threshold Voltage vs. Temperature
(Vcc = 12V, Io = 100mA)
AP1506 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
ON/OFF Voltage (V)
Temperature (T ) (°
A
AP1506 Frequency vs. Temperature
AP1506 Feedback Current vs. Temperature
(Vcc = 12V, Vout = 5V, Vfb = 1.3V)
(Vcc = 12V, Io = 500mA, Vout = 5V)
170
10
0
165
160
155
150
145
140
-10
-20
-30
-40
-50
-50 -30 -10 10 30 50 70 90 110 130 150
-50 -30 -10 10 30 50 70 90 110 130 150
Temperature (T ) (°C)
A
Temperature (T ) (°C)
A
AP1506 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 (T ) (°C)
A
AP1506 Rev. 2
7 of 13
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© Diodes Incorporated
AP1506
150KHz, 3A PWM BUCK DC/DC CONVERTER
Typical Application Circuit (TO packages)
(1) Fixed Type Circuit
FB
12V
DC Input
L1
uH
4
3.3V/3A
Output Load
33
Inductor
Output
AP1506
-33
1
2
V
in
3
5
D1*
Schottky Diode
Co
Capacitor
SD
C
GND
in
Capacitor
(2) Adjustable Type Circuit
R1
R2
FB
L1
47uH
12V
DC Input
4
5V/3A
Output Load
Output
1
AP1506
2
3
V
in
5
SD
GND
Co
Capacitor
C
in
D1*
Capacitor
Schottky Diode
R1
R2
Vout = VFB ×(1 +
FB = 1.23V
)
V
R2 = 1K ~ 3K
(3) Delay Start Circuit
R2
R1
FB
4
L1
47uH
12V
DC Input
5V/3A
Output Load
Output
2
AP1506
1
V
in
C
DELAY
3
5
0.1uF
SD
GND
Cin
Capacitor
Co
Capacitor
D1*
RDELAY
10K
Schottky Diode
Note: 3. For up to 2A = DFLS230L (V = 0.42V)
f
For up to 3A = B340LA, B340LB (V = 0.45V)
f
AP1506 Rev. 2
8 of 13
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© Diodes Incorporated
AP1506
150KHz, 3A PWM BUCK DC/DC CONVERTER
Function Description
Pin Functions
Thermal Considerations
+VIN
The AP1506 is available in two packages: a 5-pin TO-220 and a
5-pin surface mount TO-263.
This is the positive input supply for the IC switching regulator. A
suitable input bypass capacitor must be presented at this pin to
minimize voltage transients and to supply the switching currents
needed by the regulator.
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
AP1506 junction temperature rises above ambient temperature
for a 3A load and different input and output voltages. The data for
these curves was taken with the AP1506 (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.
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 to a minimum.
–
The TO-263 surface mount package tab was designed to be
soldering 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,
multi-layer PC board with large copper areas and/or airflow will
be recommended.
Feedback (FB)
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.
The AP1506 (TO-263 package) junction temperature rises 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 multi-layer PC boards with large copper areas
and/or airflow might be needed, especially for high ambient
temperatures and high output voltages.
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.
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.
AP1506 Rev. 2
9 of 13
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© Diodes Incorporated
AP1506
150KHz, 3A PWM BUCK DC/DC CONVERTER
Marking Information
(1) TO263-5L
(Top view)
Output Type:
1506: ADJ
1506-33: 3.3V
1506-50: 5.0V
1506-12: 12V
Logo
L: Lead Free Package
1506-XX
YY WW X X
ID code
Xth week: 01~52
Year: "01" = 2001
"02" = 2002
(2) TO220-5L
(Top view)
Output Type:
1506: ADJ
1506-33: 3.3V
1506-50: 5.0V
1506-12: 12V
Logo
L: Lead Free Package
1506-XX
YY WW X X
ID code
Xth week: 01~52
Year: "01" = 2001
"02" = 2002
AP1506 Rev. 2
10 of 13
NOVEMBER 2006
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© Diodes Incorporated
AP1506
150KHz, 3A PWM BUCK DC/DC CONVERTER
Package Information
(1) Package Type: TO220-5L
AP1506 Rev. 2
11 of 13
NOVEMBER 2006
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© Diodes Incorporated
AP1506
150KHz, 3A PWM BUCK DC/DC CONVERTER
Package Information (Continued)
(2) Package Type: TO263-5L
AP1506 Rev. 2
12 of 13
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NOVEMBER 2006
© Diodes Incorporated
AP1506
150KHz, 3A 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 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.
AP1506 Rev. 2
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NOVEMBER 2006
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© Diodes Incorporated
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