AP1509-50SL [ICT]
Switching Regulator, Voltage-mode, 3A, 173kHz Switching Freq-Max, PDSO8, LEAD FREE, SOP-8;
| 型号： | AP1509-50SL |
| 厂家： | 
InnoChips Technology |
| 描述： | Switching Regulator, Voltage-mode, 3A, 173kHz Switching Freq-Max, PDSO8, LEAD FREE, SOP-8 光电二极管 |
| 文件： | 总9页 (文件大小：169K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
AP1509
150KHz, 2A PWM Buck DC/DC Converter
Features
General Description
- Output voltage: 3.3V, 5V, 12V and adjustable
output version
The AP1509 series are monolithic IC designed for a
step-down DC/DC converter, and own the ability of
driving a 2A load without additional transistor. It
saves board space. The external shutdown function
can be controlled by logic level and then come into
standby mode. The internal compensation makes
feedback control having 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 occurs and
VFB is down below 0.5V, the switching frequency
will be reduced. The AP1509 series operates at a
switching frequency of 150KHz thus allow 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 chips are
available in a standard 8-lead SOP-8 package.
- 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: 2A
- SOP-8L 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)
V
IN
GND
GND
GND
GND
1
8
Output
FB
SD
2
3
4
7
6
5
Output
GND
FB
Ground
SOP-8L
Output voltage feedback control
ON/OFF Shutdown
SD
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. 1.2 Oct 24, 2005
1/9
AP1509
150KHz, 2A PWM Buck DC/DC Converter
Ordering Information
AP1509 XX X X X
Package
S: SOP-8L Blank : Normal
Output version
Lead Free
Packing
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
up
Reference
Regulator
+
Comp
_
_
Comp
+
Frequecy
compen-
sation
+
_
_
Amp
2A
Comp
Pre-driver
FB
Switch
+
Output
Gnd
150kHz
OSC.
Thermal
Shutdown
Anachip Corp.
www.anachip.com.tw
Rev. 1.2 Oct 24, 2005
2/9
AP1509
150KHz, 2A PWM Buck DC/DC Converter
Absolute Maximum Ratings
Symbol
VCC
Parameter
Rating
+24
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 +18
-0.3 to +18
-1
V
V
V
W
oC
oC
V
Internally limited
-65 to +150
-40 to +125
+4.5 to +22
TOP
VOP
Electrical Characteristics (All Output Voltage Versions)
LOAD = 0.5A
USnleysms botohelrwise specified, V =12V for 3.3V, 5V, adjustable version and V =18V for the 12V version. I
Parameter
Conditions
Min.
Typ.
Max.
Unit
IN
IN
VFB=1.3V
-50
IFB
Feedback bias current
-10
nA
(Adjustable version only)
-100
173
173
127
150
FOSC
FSCP
Oscillator frequency
KHz
KHz
110
Oscillator frequency of When current limit occurred
10
30
50
1.4
1.5
short circuit protect
and VFB < 0.5V, Ta=25 oC
OUT=2A
I
VSAT
DC
ICL
Saturation voltage
1.25
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
Current limit
No outside circuit
VFB=0V force driver on
No outside circuit
VFB=12V force driver off
VIN=22V
3
Output
Output = 0
-200
uA
IL
leakage
current
Output = -1
-5
5
mA
mA
IQ
ISTBY
VIL
Quiescent Current
Standby Quiescent
Current
VFB=12V force driver off
ON/OFF pin=5V
10
150
200
0.6
70
uA
VIN=22V
Low (regulator ON)
-
ON/OFF pin logic input
threshold voltage
1.3
V
VIH
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
15
Junction to
case
Thermal Resistance
SOP-8L
oC/W
oC/W
ΘJC
Thermal Resistance
With copper area of
approximately 3 in2
Junction to
ambient
ΘJA
SOP-8L
70
Anachip Corp.
www.anachip.com.tw
Rev. 1.2 Oct 24, 2005
3/9
AP1509
150KHz, 2A PWM Buck DC/DC Converter
Electrical Characteristics (Continued)
Symbol
Parameter
Conditions
Typ.
Limit
Unit
4.5V < VIN < 22V
0.2A < ILOAD < 2A
V
Output
VFB
1.23
1.193/1.18
1.267/1.28
VMIN
VMAX
Feedback
VOUT programmed for
AP1509-ADJ
3V
η
Efficiency
V
IN = 12V, ILOAD=2A
76
3.3
78
5
%
V
4.75V < VIN < 22V
0.2A < ILOAD < 2A
3.168/3.135
3.432/3.465
VOUT
Output voltage
Efficiency
VMIN
VMAX
AP1509-3.3V
AP1509-5V
AP1509-12V
η
VIN = 12V, ILOAD=2A
%
V
7V < VIN < 22V
4.8/4.75
5.2/5.25
VOUT
Output voltage
Efficiency
VMIN
VMAX
0.2A < ILOAD < 2A
η
VIN = 12V, ILOAD=2A
83
12
90
%
V
15V < VIN < 22V
0.2A < ILOAD < 2A
11.52/11.4
12.48/12.6
VOUT
Output voltage
Efficiency
VMIN
VMAX
η
VIN = 15V, ILOAD = 2A
%
Specifications with boldface type are for full operating temperature range, the other type are for TJ=25ºC.
Anachip Corp.
www.anachip.com.tw
Rev. 1.2 Oct 24, 2005
4/9
AP1509
150KHz, 2A PWM Buck DC/DC Converter
Typical Application Circuit
(1) Fixed Type Circuit
FB
12V
3
3.3V/2A
Output Load
L1
DC Input
47uH
Output
AP1509
1
4
2
-33
Vin
Inductor
5
6
7
8
Gnd Gnd Gnd Gnd
SD
Cin
Co
D1
Schottky Diode
Capacitor
Capacitor
(2) Adjustable Type Circuit
R2 1K
R1 1K
FB
3
12V
L1
2.5V/2A
DC Input
39uH
Output
Output Load
1
4
2
8
AP1509
Vin
Inductor
5
6
7
D1
SD GndGndGndGnd
Cin
Co
Schottky
Diode
Capacitor
Capacitor
R1
Vout = VFB ×(1 +
)
R2
VFB = 1.23V
R2 = 1K ~ 3K
(3) Delay Start Circuit
R2 1K
Vin
R1 1K
FB
3
12V
DC Input
L1
2.5V/2A
Output Load
39uH
Output
1
4
2
8
AP1509
Inductor
CDELAY
0.1uF
5
SD
6
7
D1
Schottky
Diode
Co
GndGndGndGnd
RDELAY
10K
Capacitor
Cin
Capacitor
Anachip Corp.
www.anachip.com.tw
Rev. 1.2 Oct 24, 2005
5/9
AP1509
150KHz, 2A PWM Buck DC/DC Converter
Typical Performance Characteristics
AP1509 Efficiency v.s. Temperature
(Vin=12V,Vout=5V,Io=2A)
AP1509 Efficiency v.s. Temperature
(Vin=12V,Vout=3.3V,Io=2A)
86
85
84
83
82
81
80
79
78
77
76
75
81
80
79
78
77
76
75
74
73
-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)
AP1509 Saturation Voltage v.s. Temperature
(Vcc=12V,Vfb=0V,VSD=0)
AP1509 Switch Current Limit v.s. Temperature
(Vcc=12V,Vfb=0V)
1.4
5.5
1.3
5
1.2
2A
4.5
4
1.1
1A
1
0.5A
0.9
3.5
3
0.8
0.7
-50
-30
-10
10
30
50
70
90
-50
-25
0
25
50
75
100
125
Temperature (TA)ꢀ(°C)
Temperature (TA) (°C)
AP1509 Supply Current v.s. Temperature
(Vcc=12V , No Load ,Von/off =0V(Switch ON) ,Von/off =5V(Switch OFF))
15
14
13
12
11
10
9
60
55
50
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. 1.2 Oct 24, 2005
6/9
AP1509
150KHz, 2A PWM Buck DC/DC Converter
Typical Performance Characteristics (Continued)
AP1509 Threshold Voltage v.s. Temperature
AP1509 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)
AP1509 Frequency v.s. Temperature
(Vcc=12V , Io=500mA ,Vout=5V)
AP1509 Feedback Current v.s. Temperature
(Vcc=12V , Vout=5V,Vfb=1.3V)
170
165
160
155
150
145
10
0
-10
-20
-30
-40
140
-50
-50 -30 -10 10 30 50 70 90 110 130 150
-50 -30 -10 10 30 50 70 90 110 130 150
Temperature (TA) (°C)
Temperature (TA) (°C)
AP1509 Output Voltage v.s. Temperature
(Vin=12V ,Io=2A)
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. 1.2 Oct 24, 2005
7/9
AP1509
150KHz, 2A PWM Buck DC/DC Converter
Function Description
Pin Functions
Thermal Considerations
The SOP-8 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 AP1509 junction
temperature rises above ambient temperature for a
2A load and different input and output voltages.
The data for these curves was taken with the
+VIN
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.
AP1509 (SOP-8 package) operating as
a
Ground
buck-switching regulator in an ambient temperature
of 25oC (still air). These temperature increments
are all approximate and are affected by many
factors. Higher ambient temperatures requires more
heat sinker.
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
minimized.
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 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
Senses the regulated output voltage to complete
the feedback loop.
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 SD pin can be wired to
the ground pin.
Package
thermal
resistance
and
junction
temperature increments are all approximate. The
increments are affected by a lot of factors. 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.
Anachip Corp.
www.anachip.com.tw
Rev. 1.2 Oct 24, 2005
8/9
AP1509
150KHz, 2A PWM Buck DC/DC Converter
Marking Information
SOP-8L
(Top view)
Part Number
Output Type:
Logo
Blank: Adjustable
Blank: normal
L: Lead Free Package
1509-XX
33: 3.3V
YYWW XX
50: 5.0V
12: 12V
Date Code
X: Internal code
WW: Nth week
YY: Year
Package Information
Package Type: SOP-8L
L
VIEW "A"
0.015x45
D
7 (4X)
7 (4X)
e
B
VIEW "A"
y
Dimensions In Millimeters
Dimensions In Inches
Symbol
Min.
1.40
0.10
1.30
0.33
0.19
4.80
3.70
-
Nom.
1.60
-
Max.
1.75
0.25
1.50
0.51
0.25
5.30
4.10
-
6.20
1.27
0.10
8O
Min.
Nom.
0.063
-
Max.
A
A1
A2
B
0.055
0.040
0.051
0.013
0.0075
0.189
0.146
-
0.069
0.100
0.059
0.020
0.010
0.209
0.161
-
0.244
0.050
0.004
8O
1.45
0.41
0.20
5.05
3.90
1.27
5.99
0.71
-
0.057
0.016
0.008
0.199
0.154
0.050
0.236
0.028
-
C
D
E
e
H
L
5.79
0.38
-
0.228
0.015
-
y
0O
-
0O
-
θ
Anachip Corp.
www.anachip.com.tw
Rev. 1.2 Oct 24, 2005
9/9
相关型号：
AP1509-50SLA
Switching Regulator, Voltage-mode, 3A, 173kHz Switching Freq-Max, PDSO8, LEAD FREE, SOP-8
ICT
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