AP1507-33D5L [ANACHIP]
150KHz, 3A PWM Buck DC/DC Converter; 为150KHz ， 3A PWM降压型DC / DC转换器
| 型号： | AP1507-33D5L |
| 厂家： | 
ANACHIP CORP |
| 描述： | 150KHz, 3A PWM Buck DC/DC Converter |
| 文件： | 总9页 (文件大小：170K) |
| 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
Features
General Description
- Output voltage: 3.3V, 5V, 12V and adjustable
output version
The AP1507 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 against 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 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 fixed 3.3V, 5V, 12V, and an adjustable
type. The package is available in a 5-lead TO-252.
- 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
- TO252-5L 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
Description
( Top View )
VIN
Output
GND
FB
Operating voltage input
Switching output
Ground
5 SD
4 FB
3 Gnd
2 Output
1 VIN
Output voltage feedback control
Metal Tab GND
SD
ON/OFF Shutdown
TO252-5L
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.1.1 Oct 29, 2004
1/9
AP1507
150KHz, 3A PWM Buck DC/DC Converter
Ordering Information
AP1507 XX
Output version
Package
Lead Free
Packing
D5: TO252-5L Blank : Normal
Blank : Adjustable
-33 : 3.3V
Blank : Tube
L : Lead Free Package
A
: Taping
-50 : 5.0V
-12 : 12V
Block Diagram
SD
VIN
200mV
220mV
Current
Source
bias
1.235V
2.5V
Start
Reference
Regulator
up
+
Comp
_
_
Comp
+
Frequecy
compen-
sation
+
_
_
Amp
3A
Comp
Pre-driver
FB
Switch
+
Output
Gnd
150kHz
OSC.
Thermal
Shutdown
Anachip Corp.
www.anachip.com.tw
Rev.1.1 Oct 29, 2004
2/9
AP1507
150KHz, 3A PWM Buck DC/DC Converter
Absolute Maximum Ratings
Symbol
Parameter
Supply Voltage
Rating
Unit
VCC
VSD
VFB
VOUT
PD
TST
TOP
VOP
+24
-0.3 to +18
-0.3 to +18
-1
V
V
V
ON/OFF Pin input voltage
Feedback Pin voltage
Output voltage to Ground
Power dissipation
Storage temperature
Operating temperature
Operating voltage
V
Internally limited
-65 to +150
-40 to +125
+4.5 to +22
W
oC
oC
V
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
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
Oscillator frequency of When current limit occurred
5
15
25
1.6
1.7
short circuit protect
and VFB < 0.5V, Ta=25 oC
IOUT=3A
VSAT
DC
ICL
Saturation voltage
1.4
V
%
A
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
6.5
Current limit
No outside circuit
3.6
4.5
VFB=0V force driver on
Output No outside circuit
Output = 0V
-200
uA
ILEAK
leakage VFB=12V force driver off
current
Quiescent Current
Output = -1V
VIN=22V
-5
5
mA
mA
IQ
VFB=12V force driver off
10
150
Standby Quiescent
ON/OFF pin=5V
VIN=22V
ISTBY
70
uA
Current
200
0.6
-
VIL
VIH
Low (regulator ON)
-
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
Thermal Resistance
IH
V
V
LOGIC=2.5V (OFF)
-0.01
-1
uA
IL
LOGIC=0.5V (ON)
-0.1
10
Junction to
case
TO252-5L
oC/W
oC/W
ΘJC
Thermal Resistance
With copper area of
Junction to
ambient
ΘJA
TO252-5L
50
approximately 2cm ×2cm
Specifications with boldface type are for full operating temperature range, the other type are for TJ=25ºC.
Anachip Corp.
www.anachip.com.tw
3/9
Rev.1.1 Oct 29, 2004
AP1507
150KHz, 3A PWM Buck DC/DC Converter
Electrical Characteristics (Continued)
Symbol
VFB
Parameter
Conditions
Typ.
Limit
Unit
5V < VIN < 22V
V
Output
0.2A < ILOAD < 3A
1.23
1.193/1.18
1.267/1.28
VMIN
VMAX
Feedback
VOUT programmed for
AP1507-ADJ
3V
VIN = 12V, ILOAD=3A
η
Efficiency
Output voltage
Efficiency
74
3.3
75
5
%
V
5.5V < VIN < 22V
0.2A < ILOAD < 3A
3.168/3.135
3.432/3.465
VOUT
VMIN
VMAX
AP1507-3.3V
AP1507-5V
AP1507-12V
η
VIN = 12V, ILOAD=3A
%
V
8V < VIN < 22V
4.8/4.75
5.2/5.25
VOUT
Output voltage
Efficiency
VMIN
VMAX
0.2A < ILOAD < 3A
η
V
IN = 12V, ILOAD=3A
80
12
89
%
V
15V < VIN < 22V
11.52/11.4
12.48/12.6
VOUT
Output voltage
Efficiency
VMIN
VMAX
0.2A < ILOAD < 3A
η
VIN = 16V, 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
4/9
Rev.1.1 Oct 29, 2004
AP1507
150KHz, 3A PWM Buck DC/DC Converter
Typical Performance Characteristics
AP1507 Efficiency v.s. Temperature
(Vin=12V,Vout=5V,Io=3A)
AP1507 Efficiency v.s. Temperature
(Vin=12V,Vout=3.3V,Io=3A)
78
77
76
75
74
73
72
71
70
83
82
81
80
79
78
77
76
75
74
73
72
-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 v.s. Temperature
(Vcc=12V,Vfb=0V,VSD=0)
AP1507 Switch Current Limit v.s. Temperature
(Vcc=12V,Vfb=0V)
1.6
1.5
1.4
5.5
3A
5
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 (TA)ꢀ(°C)
Temperature (TA) (°C)
AP1507 Supply Current v.s. 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
45
40
35
30
Switch OFF
8
Switch ON
7
6
5
-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)
Anachip Corp.
www.anachip.com.tw
Rev.1.1 Oct 29, 2004
5/9
AP1507
150KHz, 3A PWM Buck DC/DC Converter
Typical Performance Characteristics (Continued)
AP1507 Threshold Voltage v.s. Temperature
AP1507 ON/OFF Current v.s. ON/OFF Voltage
(Vcc=12V , Io=100mA)
(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 v.s. Temperature
(Vcc=12V , Io=500mA ,Vout=5V)
AP1507 Feedback Current v.s. 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 v.s. 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)
Anachip Corp.
www.anachip.com.tw
Rev.1.1 Oct 29, 2004
6/9
AP1507
150KHz, 3A PWM Buck DC/DC Converter
Typical Application Circuit
(1) Fixed Type Circuit
FB
12V
L1
4
3.3V/3A
Output Load
DC Input
33uH
Output
AP1507
-33
1
2
Vin
Inductor
5
3
D1
SD
Gnd
Cin
Co
Schottky
Diode
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
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
L1
12V
4
5V/ 3A
Output Load
47uH
DC Input
Output
1
AP1507
2
Vin
CDELAY
0.1uF
5
3
SD
Gnd
Cin
Co
D1
Capacitor
Capacitor
RDELAY
10K
Schottky Diode
Anachip Corp.
www.anachip.com.tw
Rev.1.1 Oct 29, 2004
7/9
AP1507
150KHz, 3A PWM Buck DC/DC Converter
Function Description
The
AP1507
(TO-252
package)
junction
Pin Functions
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 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.
+VIN
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 – 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 (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
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.
feature is not needed, the ON /OFF pin can be
wired to the ground pin.
Thermal Considerations
The TO-252 surface mount package tab is
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.
Anachip Corp.
www.anachip.com.tw
Rev.1.1 Oct 29, 2004
8/9
AP1507
150KHz, 3A PWM Buck DC/DC Converter
Marking Information
TO252-5L
(Top view)
Part Number
Output Type:
Logo
Blank: normal
1507 - XX
Blank: Adjustable
33: 3.3V
L: Lead Free Package
X X X X X X
ID Code
50: 5.0V
Xth Week: 01~52
Year: "01" = 2001
"02" = 2002
12: 12V
Package Information
Package Type: TO252-5L
5.6
A
B
0.6
1.27
G
Land Pattern Recommendation (Unit: mm)
P(TYP.)
S
L
Dimensions In Millimeters
Dimensions In Inches
Symbol
Min.
Nom.
6.60
Max.
6.85
5.50
7.20
2.80
Min.
Nom.
0.260
Max.
A
B
C
D
P
S
G
H
J
6.35
5.20
6.80
2.20
0.250
0.205
0.268
0.087
0.270
0.217
0.283
0.110
5.35
0.211
7.00
0.276
2.50
0.098
1.27 REF.
0.65
0.050 REF.
0.026
0.50
0.40
2.20
0.46
0.00
0.90
5.40
0.80
0.60
2.40
0.58
0.15
1.50
5.59
0.020
0.016
0.087
0.018
0.000
0.035
0.213
0.031
0.024
0.094
0.023
0.006
0.059
0.220
0.50
0.020
2.30
0.091
0.52
0.020
K
L
M
0.08
0.003
1.20
0.047
5.50
0.216
Anachip Corp.
www.anachip.com.tw
Rev.1.1 Oct 29, 2004
9/9
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