AP1501-12T5L [ANACHIP]
150 KHZ 3A PWM BUCK DC/DC CONVERTER; 150 KHZ 3A PWM降压型DC / DC转换器
| 型号： | AP1501-12T5L |
| 厂家： | 
ANACHIP CORP |
| 描述： | 150 KHZ 3A PWM BUCK DC/DC CONVERTER |
| 文件： | 总11页 (文件大小：183K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
AP1501
150Khz, 3A PWM Buck DC/DC Converter
ꢀ Features
General Description
ꢀ
- Output voltage: 3.3V, 5V, 12V and adjustable
output version
The AP1501 series are monolithic IC that design for
a step-down DC/DC converter, and own the ability
of driving a 3A 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 AP1501
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 fixed 3.3V, 5V, 12V, and an
adjustable type. The packages are available in a
standard 5-lead TO-220 package and a 5-lead
TO-263.
- 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: 3A
- TO220-5L TO220-5L(R) and TO263-5L packages
- Low power standby mode
- Built-in switching transistor on chip
ꢀ Applications
- Simple High-efficiency step-down regulator
- On-card switching regulators
- Positive to negative converter
ꢀPin Assignments
ꢀ Pin Descriptions
Name
VIN
Description
Operating voltage input
Switching output
( Top View )
5 SD
4 FB
3 Gnd
Output
Gnd
FB
2 Output
Ground
1 VIN
Metal Tab GND
Output voltage feedback control
ON/OFF Shutdown
TO263-5L
SD
( Top View )
5 SD
4 FB
3 Gnd
2 Output
1 VIN
TO220-5L
This datasheet contains new product information. Anachip Corp. reserves the rights to modify the product specification without notice. No liability is assumed as a result of the use of
this product. No rights under any patent accompany the sale of the product.
Rev. A7 Feb. 10, 2004
1/11
AP1501
150Khz, 3A PWM Buck DC/DC Converter
ꢀ Ordering Information
AP1501 XX X X X
Package
Lead Free
Output version
Packing
T5: TO220-5L
Blank : Normal
Blank : Tube
Blank : Adjustable
-33 : 3.3V
T5R: TO220-5L(R)
K5: TO263-5L
L : Lead Free Package
A
: Taping
-50 : 5.0V
-12 : 12V
ꢀ Block Diagram
SD
VIN
200mV
220mV
Current
1.235V
2.5V
Start
up
Source
bias
Reference
Regulator
+
Comp
_
_
Comp
+
Frequecy
compen-
sation
+
_
_
Amp
3A
Comp
+
Pre-driver
FB
Switch
Output
Gnd
150kHz
OSC.
Thermal
Limit
Anachip Corp.
www.anachip.com.tw
Rev.A7 Feb. 10, 2004
2/11
AP1501
150Khz, 3A PWM Buck DC/DC Converter
ꢀ Absolute Maximum Ratings
Symbol
VCC
Parameter
Rating
+45
Unit
V
Supply Voltage
VSD
VFB
VOUT
PD
TST
ON/OFF Pin input voltage
Feedback Pin voltage
Output voltage to Ground
Power dissipation
Storage temperature
Operating temperature
Operating voltage
-0.3 to +25
-0.3 to +25
-1
V
V
V
W
oC
oC
V
Internally limited
-65 to +150
-40 to +125
+4.5 to +40
TOP
VOP
ꢀ 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
Symbol
Parameter
Conditions
VFB=1.3V
(Adjustable version only)
Min.
Typ.
Max.
60
100
173
173
1.4
Unit
IB
Feedback bias current
40
nA
127
110
150
FOSC
VSAT
DC
oscillator frequency
saturation voltage
Khz
V
I
OUT=3A
1.3
no outside circuit
1.5
VFB=0V force driver on
Max. Duty Cycle(ON)
Min. Duty cycle(OFF)
VFB=0V force driver on
VFB=12V force driver off
100
0
%
peak current
5.5
ICL
current limit
3.6
4.0
A
no outside circuit
VFB=0V force driver on
no outside circuit
VFB=12V force driver off
6.5
Output
Output = 0
200
uA
IL
leakage
current
Output = -1
VIN=40V
VFB=12V force driver off
ON/OFF pin=5V
VIN=40V
2
5
60
10
250
300
0.6
mA
mA
IQ
ISTBY
VIL
Quiescent Current
Standby Quiescent
Current
150
uA
Low (regulator ON)
-
ON/OFF pin logic input
threshold voltage
1.3
15
V
VIH
High (regulator OFF)
2.0
-
ON/OFF pin logic
input current
ON/OFF pin input current VLOGIC=0.5V (ON)
IH
IL
VLOGIC=2.5V (OFF)
25
5
uA
0.02
2.5
3.5
28
TO220-5L
TO263-5L
TO220-5L
Junction to
case
Thermal Resistance
oC/W
oC/W
Θ
JC
Thermal Resistance
With copper area of
approximately 3 in2
Junction to
ambient
Θ
JA
TO263-5L
23
Anachip Corp.
www.anachip.com.tw
Rev.A7 Feb. 10, 2004
3/11
AP1501
150Khz, 3A PWM Buck DC/DC Converter
ꢀ Electrical Characteristics (Continued)
Symbol
Parameter
Conditions
Typ.
Limit
Unit
4.5V < VIN < 40V
0.2A < ILOAD < 3A
VOUT programmed for
3V
V
Output
VFB
1.23
1.193/1.18
1.267/1.28
VMIN
VMAX
Feedback
AP1501-ADJ
η
Efficiency
V
IN = 12V, ILOAD=3A
73
3.3
73
5
%
V
4.75V < VIN < 40V
0.2A < ILOAD < 3A
3.168/3.135
3.432/3.465
VOUT
Output voltage
Efficiency
VMIN
VMAX
AP1501-3.3V
AP1501-5V
AP1501-12V
η
VIN = 12V, ILOAD=3A
%
V
7V < VIN < 40V
4.8/4.75
VOUT
Output voltage
Efficiency
VMIN
VMAX
0.2A < ILOAD < 3A
5.2/
5.25
η
VIN = 12V, ILOAD=3A
80
12
90
%
V
15V < VIN < 40V
0.2A < ILOAD < 3A
11.52/11.4
12.48/12.6
VOUT
Output voltage
Efficiency
VMIN
VMAX
η
VIN = 15V, ILOAD = 3A
%
Specifications with boldface type are for full operating temperature range, the other type are for TJ=25ºC.
Anachip Corp.
www.anachip.com.tw
4/11
Rev.A7 Feb. 10, 2004
AP1501
150Khz, 3A PWM Buck DC/DC Converter
ꢀTypical Performance Characteristics
Typical Performance Characteristics
Normalized Output Voltage
Efficiency
100
5.10
VIN =20V, ILOAD=3A
Normalized at T =25oC
J
95
90
3A Load
5.05
5.00
4.95
4.90
85
80
75
70
65
5V
3.3V
-50
-25
0
25
50
75 100 125
30
40
8
10 15
20
25
35
JUNCTION TEMPERATURE(oC)
JUNCTION TEMPERATURE(oC)
Switch Saturation Voltage
Switch Current Limit
5.50
5.00
4.50
4.00
3.50
1.60
1.40
1.20
1.00
0.80
0.60
1 : -40 oC
VIN=12V, VOUT=5V
2 : 25 oC
3 : 125 oC
1
2
3
0.5
2
3
1
-50 -25
0
25 50 75 100 125
SWITCH CURRENT(A)
JUNCTION TEMPERATURE(oC)
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 : -40 oC
2 : 25 oC
3
Switch OFF
o
3 : 125 C
0.0
-50
-25
0
25
50 75 100 125
JUNCTION TEMPERATURE(oC)
10
20
30
40
SUPPLY VOLOTAGE (V)
Anachip Corp.
www.anachip.com.tw
Rev.A7 Feb. 10, 2004
5/11
AP1501
150Khz, 3A 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)
Anachip Corp.
www.anachip.com.tw
Rev.A7 Feb. 10, 2004
6/11
AP1501
150Khz, 3A PWM Buck DC/DC Converter
ꢀTypical Application Circuit
FB
12V
4
3.3V/3A
L1
DC Input
Output
Output Load
AP1501
-33
1
2
Vin
Inductor
5
3
SD
Gnd
C
in
Co
D1
Capacitor
Capacitor
Schottky Diode
ꢀFunction Description
Pin Functions
+VIN
Thermal Considerations
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 AP1501 is available in two packages, a 5-pin
TO-220 and a 5-pin surface mount TO-263.
The TO-220 package needs a heat sink under most
conditions. The size of the heatsink depends on the
input voltage, the output voltage, the load current
and the ambient temperature. The AP1501 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
AP1501 (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 a minimum.
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 0.4 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 board with large copper areas and/or airflow are
recommended.
Feedback
Senses the regulated output voltage to complete
the feedback loop.
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
25V) 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.
Anachip Corp.
www.anachip.com.tw
Rev.A7 Feb. 10, 2004
7/11
AP1501
150Khz, 3A PWM Buck DC/DC Converter
ꢀFunction Description (Continued)
air, and moving air lowers the thermal resistance
even further.
The
AP1501
(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 2A are used, double sided or multilayer
PC boards with large copper areas and/or airflow
might be needed, especially for high ambient
temperatures and high output voltages.
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. 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.
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
ꢀMarking Information
(2) TO220-5L
(1) TO263-5L
( Top view )
( Top view )
Output Type:
Output Type:
1501: ADJ
Logo
AC
1501: ADJ
Logo
AC
Blank: normal
1501-33: 3.3V
1501-50: 5.0V
1501-12: 12V
1501-XX
YY WW X X
Blank: normal
1501-33: 3.3V
1501-50: 5.0V
1501-12: 12V
L: Lead Free Package
1501-XX
YY WW X X
L: Lead Free Package
ID code
ID code
Xth week: 01~52
Year: "01" = 2001
"02" = 2002
Xth week: 01~52
Year: "01" = 2001
"02" = 2002
Anachip Corp.
www.anachip.com.tw
Rev.A7 Feb. 10, 2004
8/11
AP1501
150Khz, 3A PWM Buck DC/DC Converter
ꢀ Package Information
(1) Package Type: TO220-5L
E
A
F
Φ
P
b
C
e
J1
e1
Dimensions In Millimeters
Symbol
Dimensions In Inches
Min.
4.07
0.76
0.36
14.22
9.78
1.57
6.68
1.14
5.46
2.29
13.21
3.68
2.54
Nom.
4.45
0.89
0.50
14.86
10.16
1.71
6.81
1.27
6.16
2.74
13.97
3.81
2.73
Max.
4.82
1.02
0.64
15.50
10.54
1.85
6.93
1.40
6.86
3.18
14.73
3.94
2.92
Min.
Nom.
Max.
A
b
C
D
E
e
e1
F
H1
J1
L
Øp
Q
0.160
0.030
0.014
0.175
0.035
0.020
0.190
0.040
0.025
0.560
0.385
0.062
0.263
0.045
0.215
0.090
0.520
0.145
0.100
0.585
0.400
0.067
0.268
0.050
0.243
0.108
0.550
0.150
0.107
0.610
0.415
0.073
0.273
0.055
0.270
0.125
0.580
0.155
0.115
Anachip Corp.
www.anachip.com.tw
Rev.A7 Feb. 10, 2004
9/11
AP1501
150Khz, 3A PWM Buck DC/DC Converter
ꢀ Package Information (Continued)
(2) Package Type: TO263-5L
E
F
A
C2
L1
C
e
B
Dimensions In Millimeters
Dimensions In Inches
Symbol
Min.
4.07
0.66
0.36
1.14
8.65
9.78
1.57
6.60
14.61
2.29
-
Nom.
4.46
0.84
0.50
1.27
9.15
10.16
1.71
6.86
15.24
2.54
-
Max.
4.85
1.02
0.64
1.40
9.65
10.54
1.85
7.11
15.88
2.79
2.92
Min.
Nom.
0.176
0.033
0.020
0.050
0.360
0.400
0.068
0.270
0.600
0.100
-
Max.
A
B
C
C2
D
E
e
F
L
L1
L2
0.160
0.026
0.014
0.045
0.341
0.385
0.062
0.260
0.575
0.090
-
0.191
0.040
0.025
0.055
0.380
0.415
0.073
0.280
0.625
0.110
0.115
Anachip Corp.
www.anachip.com.tw
Rev.A7 Feb. 10, 2004
10/11
AP1501
150Khz, 3A PWM Buck DC/DC Converter
ꢀ Package Information (Continued)
(3) Package Type: TO220-5L(R) Mechanical drawing
A
E
F
Q
H1
D
H2
d1
H3
d2
J1
b
J2
J3
e
J3
J2
A
J1
E
Dimensions In Millimeters
Dimensions In Inches
Symbol
Min.
4.4
Nom.
4.6
Max.
4.7
Min.
Nom.
0.180
0.032
0.340
0.039
0.248
0.400
0.067
0.050
0.250
0.850
0.972
0.105
0.177
0.331
0.110
Max.
A
b
0.175
0.027
0.330
0.185
0.037
0.350
0.7
0.8
0.9
D
8.4
8.7
8.9
d1
d2
E
1.0
6.3
9.91
1.6
10.16
1.7
10.41
1.8
0.390
0.062
0.048
0.410
0.072
0.052
e
F
1.2
1.25
6.4
1.3
H1
H2
H3
J1
J2
J3
Q
20.8
23.9
21.6
24.7
2.7
22.4
25.5
0.820
0.942
0.880
1.002
3.7
2.5
4.5
5.3
3.0
0.147
0.100
0.207
0.120
8.4
2.8
Anachip Corp.
www.anachip.com.tw
Rev.A7 Feb. 10, 2004
11/11
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