APE1705S-33 [A-POWER]
IC SWITCHING REGULATOR, PSSO5, LEAD FREE, TO-263, 5 PIN, Switching Regulator or Controller;
| 型号： | APE1705S-33 |
| 厂家： | 
ADVANCED POWER ELECTRONICS CORP. |
| 描述： | IC SWITCHING REGULATOR, PSSO5, LEAD FREE, TO-263, 5 PIN, Switching Regulator or Controller 开关 |
| 文件： | 总12页 (文件大小：574K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
Advanced Power
Electronics Corp.
APE1705
150KHz, 3A PWM Buck DC/DC Converter
GENERAL DESCRIPTION
The APE1705 series are monolithic IC designed for a step-down DC/DC converter,
and own the ability of driving a 3A 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
APE1705 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 5-Lead TO-263 and 5-Lead TO-220 package.
FEATURES
-
-
-
-
-
-
-
-
-
-
-
-
Output voltage: 3.3V, 5V, 12V and adjustable output version.
Adjustable version output voltage range, 1.23V to 38.5V.
150KHz ±15% fixed switching frequency.
Voltage mode non-synchronous PWM control.
Thermal-shutdown and current-limit protection.
ON/OFF shutdown control input.
Short Circuit Protect (SCP).
Operating voltage can be up to 40V.
Output load current: 3A.
5-Lead TO-263 and TO-220 Pb-Free packages.
Low power standby mode.
Built-in switching transistor on chip.
This datasheet contains new product information. Advanced Power Electronics 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.
1
200801173
Advanced Power
Electronics Corp.
APE1705
150KHz, 3A PWM Buck DC/DC Converter
BLOCK DIAGRAM
EN
200mV
V
CC
220mV
1.235V
CURRENT
SOURCE
BIAS
START
UP
2.5V
REGULATOR
REFERENCE
+
COMP.
_
Current
limit
_
COMP.
+
150kHz
OSC.
FB
R2
R1
+
AMP
+
CONTROL
+
DRIVER
3A
SWITCH
_
COMP.
_
COMP.
SW
Vss
Thermal
Shutdown
ADJ : R2=0Ω, R1=OPEN
PIN ASSIGNMENT
The package of APE1705 are TO263-5L and TO220-5L(R); the pin assignment is given by:
Name
VCC
SW
VSS
Description
Operating voltage input
Switching output
GND pin
( Side View )
TO263-5L
5 EN
4 FB/OUT
3 VSS
2 SW
Metal
Tab
GND
FB
Output voltage feedback control
for ADJ version
1 VCC
( Top View )
OUT
Output voltage feedback control
EN
ON/OFF Shutdown
( Side View )
TO220-5L
TO220-5LR ( Side View )
5 EN
5 EN
4 FB/OUT
3 VSS
Metal
Tab
GND
4 FB/OUT
3 VSS
Metal
Tab
GND
2 SW
1 VCC
2 SW
1 VCC
( Top View )
( Top View )
2
Advanced Power
Electronics Corp.
APE1705
150KHz, 3A PWM Buck DC/DC Converter
ORDER INFORMATION
Order Information
APE1705X -XX
Package Type
S: TO263-5L
P :TO220-5L
PR:TO220-5L-R
Output Voltage
33:3.3V
50:5.0V
12: 12V
Blank:ADJ
MARKING INFORMATION
Top Marking
ADJ
Part number
1705X
ID code: internal
WW: 01~52
YWWSSS
Year : 6 = 2006
FIX
Part number
Output Voltage
1705X
-50
ID code: internal
YWWSSS
WW: 01~52
Year : 6 = 2006
3
Advanced Power
Electronics Corp.
APE1705
150KHz, 3A PWM Buck DC/DC Converter
Absolute Maximum Ratings
Characteristics
Maximum Supply Voltage
Symbol
VCC
VEN
VFB
Rating
Unit
V
+45
-0.3 to 40
ON/OFF Pin Input Voltage
V
Feedback Pin Voltage (for ADJ version)
Output Voltage to Ground (for Fixed version)
Power Dissipation Internally limited
Storage Temperature Range
-0.3 to 20
V
VOUT
PD
0.7 to 45
V
( TJ-TA ) / θJA
-65 to +150
-40 to +125
+4.5 to +40
TO263=3.5,TO220=3.5
TO263=25,TO220=25
W
TST
℃
℃
V
Operating Temperature Range
TOP
Operating Supply Voltage
VOP
θJC
Thermal Resistance from Junction to case
Thermal Resistance from Junction to ambient
℃/W
℃/W
θJA
Note : θJA is measured with the PCB copper area(need connect to VSS pins) of approximately 3 in2 (Multi-layer).
Electrical Characteristics (Unless otherwise specified, Ta=25°C, VCC=12V for 3.3V, 5V,
adjustable version and VCC=18V for the 12V version. ILOAD = 0.2A)
Characteristics
Quiescent Current
Symbol
Conditions
Min Typ Max Units
ICCQ VFB=12V force driver off
4
8
mA
VFB=1.3V
(Adjustable version only)
EN pin=5V
VCC=40V
-50
-100
200
300
Feedback bias current
IFB
-10
nA
Shutdown supply Current
Oscillator frequency
ISD
100
uA
FOSC
127 150 173 KHz
(Adjustable) When VFB<0.5V
FSCP
60
60
100
0
KHz
KHz
Oscillator frequency of short
circuit protect
(Fixed)When < VOUT*40%
Max. Duty Cycle (ON)
Min. Duty Cycle (OFF)
VFB=0V force driver on
DC
%
VFB=12V force driver off
Pear current, No outside circuit
V FB=0V force driver on
Current limit
ICL
3.5
-
A
%
V
Load Regulation( △VOUT/VOUT ) △VOUT IOUT = 0.2 to 3A
0.6 1.2
1.4
1.3
IOUT=3A, No outside circuit
VFB=0V force driver on
Saturation voltage
VSA T
1.5
No outside circuit
VFB=12V force driver off
SW pin
leakage
current
SW pin=0V
-200 uA
ISW L
SW pin=-0.8V
VCC=40V force driver off
-5
mA
VIL Low (regulator ON)
VIH High (regulator OFF)
IH VEN=2.5V (OFF)
-
0.6
EN pin logic input threshold
voltage
1.3
-0.1
V
2.0
-
EN pin logic input current
EN pin input current
-5
uA
IL
VEN=0.5V (ON)
-0.01 -1
135
Thermal shutdown Temp
TSD
℃
4
Advanced Power
Electronics Corp.
APE1705
150KHz, 3A PWM Buck DC/DC Converter
Electrical Characteristics (Continued)
version
Characteristics Symbol
Conditions
4.5V < VCC < 40V
0. 2A < ILOAD < 3A
VOUT programmed
for 3V
Min
Typ
Max Units
Output Feedback
1.193
1.267
V
V
FB
1.23
APE1705-ADJ
voltage
/1.180
/1.280
Efficiency
Output voltage
Efficiency
η
VCC = 12V, ILOAD=3A
4.75V < VCC < 40V
0.2A < ILOAD < 3A
VCC = 12V, ILOAD=3A
7V < VCC < 40V
74
3.3
75
%
V
3.168
3.432
V
OUT
APE1705-3.3V
APE1705-5.0V
APE1705-12V
/3.135
/3.465
η
%
4.80
5.20
V
Output voltage
Efficiency
V
OUT
5.0
80
12
89
0.2A < ILOAD < 3A
VCC = 12V, ILOAD=3A
15V < VCC < 40V
0.2A < ILOAD < 3A
VCC = 24V, ILOAD = 3A
/4.75
/5.25
η
%
V
11.52
12.48
Output voltage
Efficiency
V
OUT
/11.40
/12.60
η
%
Specifications with boldface type are for full operating temperature range, the other type
are for TJ=25ºC.
5
Advanced Power
Electronics Corp.
APE1705
150KHz, 3A PWM Buck DC/DC Converter
Application Circuit
(1) VIN=12V
VIN=12V
L1
Vout=5.0V/3A
1
2
33uH
U1
R1
4.7K
1
2
4
5
Vcc
SW
FB
3
D1
Vss
C1
C2
B340A
C3
C6
R2
1.5K
470uF
0.1uF
470uF 0.1uF
EN
ON/OFF
(2) VIN=24V
VIN=24V
L1
Vout=5.0V/3A
1
2
47uH
U1
R1
4.7K
1
Vcc
2
4
5
3
SW
FB
D1
Vss
C1
C2
B340A
C3
C6
R2
1.5K
470uF
0.1uF
470uF 0.1uF
EN
R1
R2
Vout = VFB ×(1 +
), VFB = 1.23V, R2 = 0.7K ~ 3K
VOUT
5.0V
3.3V
2.5V
R2
R1
1.5K
1.5K
1.5K
4.7K
2.5K
1.5K
(3) Fixed Output Voltage Version
VIN=24V
L1
47uH
Vout=5.0V/3A
1
2
U1
1
2
Vcc
SW
FB
3
D1
B340A
Vss
4
C1
C2
0.1uF
C3
C6
470uF
470uF 0.1uF
5
EN
L1 recommend value (IOUT=3A,)
3.3V
VOUT
2.5V
33uH
33uH
5V
12V
NA
VIN=12V
VIN=24V
33uH
33uH
33~47uH
47uH
68uH
6
Advanced Power
Electronics Corp.
APE1705
150KHz, 3A PWM Buck DC/DC Converter
Function Descriptions
Pin Functions
Vcc
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.
Vss
Circuit ground.
SW
Internal switch. The voltage at this pin switches between (+VCC – VSAT) and
approximately – 0.5V, with a duty cycle of approximately VOUT / VCC. To minimize
coupling to sensitive circuitry, the PC board copper area connected to this pin should
be minimized.
Feedback
Senses the regulated output voltage to complete the feedback loop.
EN
Allows the switching regulator circuit to be shutdown using logic level signals thus
dropping the total input supply current to approximately 100uA. 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 Vcc) shuts the regulator down. If this shutdown
feature is not needed, the EN pin can be wired to the ground pin.
Thermal Considerations
The TO-263-5L 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 APE1705 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 APE1705 (TO263-5L package)
operating as a buck-switching regulator in an ambient temperature of 25℃ (still air).
These temperature increments are all approximate and are affected by many factors.
Higher ambient temperatures requires more heat sinker.
7
Advanced Power
Electronics Corp.
APE1705
150KHz, 3A PWM Buck DC/DC Converter
Function Descriptions (Continued)
For the best thermal performance, wide copper traces and generous amounts of
printed circuit board copper (need connect to the VSS pins) should be used in the
board layout, (One exception is the SW(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 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.
8
Advanced Power
Electronics Corp.
APE1705
150KHz, 3A PWM Buck DC/DC Converter
Typical Characteristics
Output Ripple
Power on test wave
(VIN=12V, VOUT=5V, IOUT=3A )
(VIN=12V, VOUT=5V, IOUT=3A)
VOUT
VOUT (AC)
V
IN
SW
ISW
SW
ISW
Load Transient Response
EN on test wave
(VIN=12V, VOUT=5V, IOUT=0.2~3A)
(VIN=12V, VOUT=5V, IOUT=3A )
VOUT (AC)
VOUT
V
IN
SW
SW
ISW
ISW
Efficiency
(VIN=12V, VOUT=5.0V)
Vin=12V
Efficiency
(VIN=24V, VOUT=5.0V)
Vin=12V
90%
90%
80%
70%
60%
50%
40%
30%
20%
10%
0%
80%
70%
60%
50%
40%
30%
20%
10%
0%
0.0
0.5
1.0
1.5
2.0
2.5
3.0
0.0
0.5
1.0
1.5
2.0
2.5
3.0
Iout(A)
Iout(A)
9
ADVANCED POWER ELECTRONICS CORP.
Package Outline : TO-263-5L
Millimeters
SYMBOLS
MIN
NOM MAX
A
b
4.40
0.66
0.00
0.36
2.29
4.60
0.79
0.15
0.43
2.54
4.80
0.91
0.30
0.50
2.79
L4
c
L1
E
9.80 10.10 10.40
7.60
E1
c2
L2
D
1.25
1.35
1.27
8.80
5.90
1.70
1.45
8.60
9.00
D1
e
L
14.60 15.20 15.80
0° 4° 8°
θ
1.All Dimensions Are in Millimeters.
2.Dimension Does Not Include Mold Protrusions.
Part Marking Information & Packing : TO-263-5L
Part Number
Output Voltage
1705S-XX
Package Code
LOGO
YWWSSS
Date Code (YWWSSS)
Y：Last Digit Of The Year
WW：Week
SSS：Sequence
10
ADVANCED POWER ELECTRONICS CORP.
Package Outline : TO-220-5L
Millimeters
SYMBOLS
MIN NOM MAX
4.07 4.45 4.82
0.76 0.89 1.02
0.36 0.50 0.64
14.22 14.86 15.50
9.78 10.16 10.54
1.57 1.71 1.85
6.68 6.81 6.93
1.14 1.27 1.40
5.46 6.16 6.86
2.29 2.74 3.18
13.21 13.97 14.73
3.68 3.81 3.94
2.54 2.73 2.92
A
b
C
D
E
e
e1
F
H1
J1
L
φp
Q
1.All Dimensions Are in Millimeters.
2.Dimension Does Not Include Mold Protrusions.
Part Marking Information & Packing : TO-220-5L
Part Number
1705P-XX
Output Voltage
Package Code
LOGO
YWWSSS
Date Code (YWWSSS)
Y：Last Digit Of The Year
WW：Week
SSS：Sequence
11
ADVANCED POWER ELECTRONICS CORP.
Package Outline : TO-220-5LR
Millimeters
SYMBOLS
MIN
4.40
0.70
8.40
NOM
MAX
4.70
0.90
8.90
A
b
4.6
0.80
8.70
1.00
6.30
D
d1
d2
E
9.91
1.60
1.20
10.16
1.70
1.25
6.40
21.60
24.70
4.50
8.40
10.41
1.80
1.30
e
F
H1
H2
H3
J1
J2
Q
20.8
23.90
3.7
22.4
25.50
5.3
2.50
2.80
3.00
1.All Dimension Are In Millimeters.
2.Dimension Does Not Include Mold Protrusions.
Part Marking Information & Packing : TO-220-5LR
Part Number
Package Code
Output Voltage
1705PR-XX
LOGO
YWWSSS
Date Code (YWWSSS)
Y：Last Digit Of The Year
WW：Week
SSS：Sequence
12
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