APE1720M [A-POWER]
IC SWITCHING REGULATOR, PDSO8, LEAD FREE, SOP-8, Switching Regulator or Controller;
| 型号： | APE1720M |
| 厂家： | 
ADVANCED POWER ELECTRONICS CORP. |
| 描述： | IC SWITCHING REGULATOR, PDSO8, LEAD FREE, SOP-8, Switching Regulator or Controller 转换器 |
| 文件： | 总8页 (文件大小：453K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
Advanced Power
Electronics Corp.
APE1720
200KHz, 1.5A PWM Buck DC/DC Converter
GENERAL DESCRIPTION
The APE1720 series are monolithic IC designed for a step-down DC/DC converter,
and own the ability of driving a 1.5A 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
APE1720 series operates at a switching frequency of 200KHz thus allow smaller sized
filter components than what would be needed with lower frequency switching
regulators. Other features include a guaranteed +3% tolerance on output voltage
under specified input voltage and output load conditions, The chips are available in a
standard 8-lead SOP package.
FEATURES
-
-
-
-
-
-
-
-
-
-
-
Output voltage: adjustable output version.
Adjustable version output voltage range: 0.75V to 22V+3%.
200KHz 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 24V.
Output load current: 1.5A.
SOP-8L 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.
200828071pre-1/7
Advanced Power
Electronics Corp.
APE1720
BLOCK DIAGRAM
EN
200mV
V
CC
220mV
0.75V
CURRENT
SOURCE
BIAS
2.5V
REGULATOR
START
UP
REFERENCE
+
COMP.
_
Current
limit
_
COMP.
+
200KHz
OSC.
+
AMP
+
CONTROL
+
DRIVER
_
COMP.
_
FB
COMP.
SW
Vss
Thermal
Shutdown
PIN ASSIGNMENT
The package of APE1720 is SOP-8L; the pin assignment is given by:
Name
VCC
Description
Operating voltage input
Switching output
( Top View )
APE1720M
SOP-8L
1
2
3
4
8
7
6
5
VCC
SW
FB
VSS
VSS
VSS
VSS
SW
FB
Output voltage feedback control
ON/OFF Shutdown
HIGH：ON, LOW：OFF
EN
EN
VSS
GND pin
ORDER/MARKING INFORMATION
Order Information
Top Marking
APE1720X
Part number
1720M
ID code: internal
WW: 01~52
YWWSSS
Package Type
M: SOP-8L
Year: 7 = 2007
2/7
Advanced Power
Electronics Corp.
APE1720
Absolute Maximum Ratings
Characteristics
Symbol
VCC
VEN
VFB
Rating
+26
Unit
V
Maximum Supply Voltage
ON/OFF Pin Input Voltage
-0.3 to VCC
-0.3 to 12
-0.8
V
Feedback Pin Voltage
V
Output Voltage to Ground
VOUT
PD
V
Power Dissipation Internally limited
Storage Temperature Range
Operating Temperature Range
Operating Supply Voltage
( TJ-TA ) / θJA
-65 to +150
-20 to +125
+4.0 to +24
20
W
℃
TST
TOP
℃
VOP
θJC
V
Thermal Resistance from Junction to case
Thermal Resistance from Junction to ambient
℃/W
℃/W
θJA
55
Note : θJA is measured with the PCB copper area(need connect to VSS pins) of approximately 1.5 in2 (Multi-layer).
Electrical Characteristics (Unless otherwise specified, Ta=25°C, VCC=12V. ILOAD = 0.2A)
Characteristics
Symbol
VFB IOUT=0.2A
Conditions
Min Typ Max Units
0.728 0.750 0.773
V
Feedback Voltage
Quiescent Current
IQ VFB=1.2V force driver off
IFB IOUT=0.1A
4
8
mA
Feedback bias current
-10 -50 nA
10 uA
140 200 260 KHz
Shutdown supply Current
Oscillator frequency
ISD
VEN =0V
-
2
FOSC
Oscillator frequency of short
circuit protect
FSCP (Adjustable) When VFB<0.5V
80
KHz
Max. Duty Cycle (ON)
Min. Duty Cycle (OFF)
VFB=1.2V force driver off
DC
0
%
VFB=0V force driver on
100
Pear current, No outside circuit
V FB=0V force driver on
Current limit
ICL
1.8
A
IOUT=1.5A, No outside circuit
VFB=0V force driver on
Saturation voltage
VSA T
1.2 1.5
V
No outside circuit
VFB=1.0V force driver off
SW pin
leakage
current
SW pin=0V
-200 uA
ISW L
SW pin=-0.8V
VCC=24V force driver off
-5
mA
VIH High (regulator ON)
VIL Low (regulator OFF)
IH VEN=2.5V (ON)
-
0.5
-
2.0
EN pin logic input threshold
voltage
1.2
V
-
EN pin logic input current
EN pin input current
20
-5
-
uA
IL
VEN=0.3V (OFF)
-
-
Thermal shutdown Temp
TSD
135
℃
3/7
Advanced Power
Electronics Corp.
APE1720
Application Circuit
(1) Adjustable Output Voltage Version
Vout=5V/1.5A
L1
VIN=12V
33uH
APE1720
U1
R1
1
2
3
4
8
7
6
5
6.8K
Vcc Vss
SW Vss
FB Vss
EN Vss
D1
B240A
C2
0.1uF
C3
C1
220uF
C6
R2
1.2K
220uF 0.1uF
(2) EN PIN With Delayed Startup
Vout=5V/1.5A
L1
VIN=12V
33uH
APE1720
U1
R1
1
2
3
4
8
6.8K
Vcc Vss
SW Vss
FB Vss
EN Vss
R3
100k
7
6
5
D1
B240A
C2
C1
C3
C6
R2
1.2K
0.1uF
220uF
220uF 0.1uF
ON/OFF
C4
0.1uF
R1
R2
Vout = VFB
×
(1 +
), VFB = 0.75V , R2 = 0.75K ~ 4K
Table 1 Resistor select for output voltage setting
VOUT
5V
R2
1.2K
2K
R1
6.8K
6.8K
4.7K
3K
3.3V
2.5V
1.8V
1.5V
1.3V
1.2V
2K
2K
2K
2K
2K
1.5K
1.2K
2K
4/7
Advanced Power
Electronics Corp.
APE1720
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 10uA. Pulling this pin below a
threshold voltage of approximately 0.5V shuts the regulator down, and pulling this pin
above 2.0V (up to a maximum of Vcc) turns the regulator on.
Thermal Considerations
The SOP-8 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 APE1720 junction temperature rises above ambient
temperature for a 1.5A load and different input and output voltages.
For the best thermal performance, wide copper traces and generous amounts of
PCB copper (need connect to the VSS pins) should be used in the board layout, (One
exception is the SW 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.
5/7
Advanced Power
Electronics Corp.
APE1720
Typical Characteristics
VFB VS VIN
ICCQ VS VIN
VFB VS VIN
Iccq VS VIN
0.77
6.00
5.00
4.00
3.00
2.00
1.00
0.00
0.76
0.75
0.74
0.73
0.72
0.71
4
6
8
10 12 14 16 18 20 22 24 26
Vin(V)
4
6
8
10 12 14 16 18 20 22 24 26
Vin(V)
FOSC VS VIN
FOSC VS TEMPERATURE
Fosc VS VIN
FOSC VS TEMP
240
240
230
220
210
200
190
180
170
160
150
140
230
220
210
200
190
180
-20
0
20
40
60
80 100 120
4
6
8
10 12 14 16 18 20 22 24 26
Vin(V)
temp (
)
℃
VFB VS TEMPERATURE
ICCQ VS TEMPERATURE
VFB VS TEMP
ICCQ VS TEMP
6.00
5.00
4.00
3.00
2.00
1.00
0.00
0.763
0.760
0.757
0.754
0.751
0.748
0.745
-20
0
20
40
60 80 100 120
-20
0
20 40 60 80 100 120
temp (
temp (
)
℃
)
℃
6/7
Advanced Power
Electronics Corp.
APE1720
Typical Characteristics
Output Ripple
Power on test wave
(VIN=12V, VOUT=3.3V, IOUT=1.5A)
(VIN=12V, VOUT=3.3V, IOUT=1.5A)
VOUT
VOUT(AC)
V
IN
V
IN
SW
SW
ISW
ISW
Load Transient Response
EN PIN on test wave
(VIN=12V, VOUT=3.3V, IOUT=0.1~1.5A)
(VIN=12V, VOUT=3.3V, IOUT=1.5A)
VOUT
VOUT(AC)
V
IN
V
IN
SW
SW
ISW
ISW
Efficiency
Efficiency
(VIN=12V)
(VIN=12V, VOUT=5V)
Vin=12V
90%
Vin=12V
90%
80%
70%
60%
50%
40%
30%
20%
10%
0%
80%
70%
60%
50%
40%
30%
20%
10%
0%
Vout=5V
Vout=3.3V
Vout=2.5V
Vout=1.8V
Vout=1.2V
0.0
0.5
1.0
1.5
0.0
0.5
1.0
1.5
Iout(A)
Iout(A)
7/7
ADVANCED POWER ELECTRONICS CORP.
Package Outline : SOP-8L
D
Millimeters
SYMBOLS
MIN NOM MAX
1.35 1.55 1.75
0.10 0.18 0.25
0.33 0.41 0.51
0.19 0.22 0.25
4.80 4.90 5.00
3.80 3.90 4.00
5.80 6.15 6.50
0.38 0.71 1.27
A
A1
B
8
7
6
3
5
4
E
C
E1
D
E1
E
1
2
L
θ
0
4.00 8.00
1.27 TYP
e
e
B
A
A1
DETAIL A
θ
L
1.All Dimension Are In Millimeters.
2.Dimension Does Not Include Mold Protrusions.
c
DETAIL A
Part Marking Information & Packing : SOP-8L
Part Number
Package Code
1720M
YWWSSS
Date Code (YWWSSS)
Y：Last Digit Of The Year
WW：Week
SSS：Sequence
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