ACE150550FM+H [ACE]
150KHz,2A, PWM Step-Down DC/DC Converter; 为150KHz ，2A ， PWM降压型DC / DC转换器
| 型号： | ACE150550FM+H |
| 厂家： | 
ACE TECHNOLOGY CO., LTD. |
| 描述： | 150KHz,2A, PWM Step-Down DC/DC Converter |
| 文件： | 总13页 (文件大小：710K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
ACE150X
Technology
150KHz,2A, PWM Step-Down DC/DC Converter
Description
The ACE150x series are monolithic IC designed for a step-down DC/DC converter, and own the ability of
driving 2A load without additional transistor. It saves board space.
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 ACE150x series operate at a switching frequency of 150KHz. 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..
Features
• Guaranteed 2A output current
• 3.3V, 5V, 12V and adjustable output versions
• Thermal shutdown and current limit protection
• Internal oscillator of 150kHz fixed frequency.
• Built-in TTL On/Off control
Application
• One Channel switching regulators
• LCD Monitors
• High-efficiency step-down regulator
Absolute Maximum Ratings
Parameter
Symbol
Max
Unit
Input supply voltage
ON/OFF Pin Input Voltage
Feedback Pin Voltage
Output Voltage to Ground
Power Dissipation
VCC
VSD
VFB
VOUT
PD
24
V
V
V
V
-0.3 to +18
-0.3 to +18
-1
Internally Limited W
Thermal resistance junction to ambient
SOP-8
θJA
70
OC/W
Operating junction temperature
Storage temperature range
Operating temperature
TJ
TSTG
TOPR
150
- 60 to 150
-40 to +125
OC
OC
OC
Note : Exceeding these rating could cause damage to the device. All voltages are with respect to Ground. Currents are positive
into, negative out of the specified terminal.
VER 1.2
1
ACE150X
Technology
150KHz,2A ,PWM Step-Down DC/DC Converter
Packaging Type
SOP-8 (ACE1502XXFM+)
Vin
Vout
FB
GND
GND
GND
GND
SHDN
SOP-8 (ACE1501XXFM+)
NC
Vin
Vout
FB
GND
GND
GND
GND
Pin Description
Selection Guide
ACE150 X XX XX + H
Halogen - free
Pb - free
FM : SOP-8
Output Voltage:
3.3V/5.0V/12V/ADJ
Pin
Power Dissipation Table
θJA
TA≤ 25OC
TA=70OC
TA= 85OC
Package
Df(mW/℃)TA≧25℃
(OC /W )
Power rating(mW) Power rating(mW) Power rating (mW)
FM
70
6.06
1785 1142 928
Note:
1.Exceeding the maximum allowable power dissipation will result in excessive die temperature, and the regulator
will go into Thermal shutdown.
2.TJ: Junction Temperature Calculation TJ = TA + ( PD x θJA )
The θJA numbers are guidelines for the thermal performance of the device/PC-board system. All of the above
assume no Ambient airflow.
3.θJA : Thermal Resistance-Junction to Ambient, DF: Derating factor, Po: Power consumption
VER 1.2
2
ACE150X
Technology
150KHz,2A ,PWM Step-Down DC/DC Converter
Pin Description
ACE1501
Pin Name
ACE1502
Pin Name
VIN
No.
Function
No.
Function
NC
Supply Voltage
Switch Pin. Connect inductor/diode
1
2
N.C.
VIN
1
2
Supply Voltage
VOUT
Switch Pin.
Connect inductor/diode
FB
Feedback Pin.
3
4
VOUT
FB
3
4
Shutdown Control Input.
Active-Low into shutdown mode
Feedback Pin.
SHDN
Ground Pin
Ground Pin
Ground Pin
Ground Pin
Ground Pin
Ground Pin
Ground Pin
Ground Pin
5
6
7
8
GND
GND
GND
GND
5
6
7
8
GND
GND
GND
GND
Block Diagram
VER 1.2
3
ACE150X
Technology
150KHz,2A ,PWM Step-Down DC/DC Converter
Electrical Characteristics
TA=25℃, VIN=12V for 3.3V,5V, and Adjustable version and VIN=18V for the 12V version, Io = 0.5A, unless Otherwise
specified.
Parameter
Symbol
VOUT
η
Conditions
Min.
Typ. Max. Unit
Output
Voltage
Efficiency
Output
5.5V<VIN<22V, 0.2A<ILOAD<2A
VIN=12V,ILOAD=2A
3.168
3.3
75
5.0
80
12
89
3.432
V
%
ACE1501/2-3.3
-
-
VOUT
η
8V< VIN<22V , 0.2A<ILOAD<2A
VIN=12V,ILOAD=2A
4.800
5.200
V
Voltage
Efficiency
Output
ACE1501/2-5.0
ACE1501/2-1.2
ACE1501/2-ADJ
-
11.52
-
-
12.48
-
%
VOUT
η
15V<VIN<22V , 0.2A<ILOAD<2A
VIN=16V,ILOAD=2A
V
Voltage
Efficiency
Feedback
Voltage
Efficiency
%
VFB
5V<VIN<22V, 0.2A<ILOAD<2A
1.193 1.230 1.267
V
η
VIN=12V,ILOAD=2A
VFB = 1.3V
-
74
-10
150
15
-
%
Feedback bias Current
IFB
-
-50
173
25
nA
KHz
KHz
(Adjustable Only)
TJ=25 ℃
Oscillator Frequency
Oscillator Frequency OF Short
Circuit Protect
FOSC
FSCP
127
5
When current limit occurred and
VFB<0.5V, TA=25℃
Io = 2A, No outside circuit and
VFB=0V force driver on
Saturation Voltage
VSAT
-
1.4
1.6
V
Max. Duty Cycle ( ON)
Min. Duty Cycle ( OFF)
DC
DC
VFB = 0V force driver on
VFB = 12V force driver off
-
-
100
0
-
-
%
%
Peak current, No outside circuit and
VFB= 0V force driver on
Current Limit
ILIMIT
3.6
4.5
5.5
A
Output Leakage Current No outside
circuit VFB=12V force driver off,
VOUT=0V
-
-
-
-200
30
Output Leakage Current
ILEAK
µA
VIN=22V, VOUT=-1V
-5
Quiescent Current
IQ
VFB = 12V force driver off
ON/OFF Pin=5V,VIN=22V
-
-
5
10
mA
µA
Standby Quiescent Current
ISTBY
70
156
VIL
VIH
VIL
Low(Regulator(ON)
High(Regulator(OFF)
VLOGIC=2.5V(OFF)
VLOGIC=0.5V(ON)
-
0.6
-
ON/OFF Pin Logic Input
Threshold Voltage
1.3
V
2.0
-0.01
-1
ON/OFF Pin Logic Input Current
µA
VIH
-0.1
VER 1.2
4
ACE150X
Technology
150KHz,2A ,PWM Step-Down DC/DC Converter
Notes:
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 load current and ambient temperature. The ACE150X 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
ACE150X(SOP-8 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 require more heat sinker. 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.
Package thermal resistance and junction temperature 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, 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 or 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.
Application Data
3A Diode
3A Diode
VR(V)
Surface Mount Through Hole Surface Mount Through Hole
Scgittky
Schottky
1N5820
SR302
Scgittky
Schottky
1N5823
SR502
20
SK32
MBR320
1N5821
MBR330
31DQ03
1N5822
SR304
MBR340
31DQ04
SR305
MBR520
1N5824
SR503
30
SK33
50WQ03
50WQ04
SB530
1N5825
SR504
SB540
SK34
MBRS340
40
50
SB550
50SQ080
HER601
MUR620
SK35
MBRS360
MBR350
31DQ05
MUR320
50WQ05
50WF10
VER 1.2
5
ACE150X
Technology
150KHz,2A ,PWM Step-Down DC/DC Converter
Quick design component selection table for adjustable output
Through Hole Output Capacitor
Surface Mount Output Capacitor
Output
Voltage
(V)
Panasonic
Nichicon
PL Series
(μF/V)
820/35
470/35
470/25
330/25
330/25
220/25
150/35
Feed
Panasonic
HFQ Series
(μF/V)
330/6.3
330/6.3
220/10
Nichicon
PL Series
(μF/V)
470/4
Feed
forward
Capacitor
33nF
HFQ Series
(μF/V)
820/35
560/35
470/25
330/35
330/25
220/35
220/35
forward
Capacitor
33nF
2
4
10nF
390/6.3
330/10
180/16
180/16
120/20
33/25
10nF
6
3.3nF
3.3nF
9
1.5nF
100/16
1.5nF
12
15
24
1nF
100/16
1nF
680pF
560pF
68/20
680pF
220pF
33/25
Quick design component selection table for Fixed output
Output Capacitor (μF/V)
Input / Output Condition
Inductor
Through Hole
Electrolytic
Surface Mount
Tantalum
Max.
input
Voltage
(V)
8
Output
Voltage Current
Load
Nichicon Panasonic Sprague
AVX
TPS
Series
Inductance Current
PL
HFQ
595D
(μF)
(A)
(V)
(A)
Series
Series
Series
22
33
47
22
68
68
22
22
33
22
33
47
3.5
3.5
3.5
3.1
3.1
3.1
3.5
3.5
3.5
3.1
3.1
3.1
560/25
330/35
270/35
560/16
180/35
180/35
560/16
560/25
470/35
470/35
330/35
270/50
560/25
330/35
330/35
470/25
180/35
180/35
470/25
560/35
680/35
470/25
330/35
330/35
330/10
330/10
330/10
330/10
270/10
270/10
390/6.3
390/6.3
390/6.3
390/6.3
390/6.3
330/10
220/10
220/10
220/10
220/10
100/10
100/10
330/6.3
330/6.3
330/6.3
330/6.3
330/6.3
220/10
3
15
25
9
5
2
3
2
15
25
5
12
25
6
3.3
12
25
VER 1.2
6
ACE150X
Technology
150KHz,2A ,PWM Step-Down DC/DC Converter
Typical Applications
1. ACE1501 Reference :
Fix Output Voltage Version:
ACE1501
Adjustable Voltage Version :
+5V to +24V
C1
2
3
4
3.3/2A
IN
SW
FB
L1
+
+
C2
470uF
470uF
ACE1501
NC
R1
1
GND
5-8
D1
R2
Power
SOP-8
VOUT = VFB ( I + R1/R2 )
VFB = 1.23V . R2 = 1K - 3K
2. ACE1502 Reference :
Fix Output Voltage Version :
ACE1502
VER 1.2
7
ACE150X
Technology
150KHz,2A ,PWM Step-Down DC/DC Converter
Adjustable Voltage Version :
2.5V/2A Output Load
ACE1502
VOUT = VFB ( I + R1 )
R2
VFB = 1.23V . R2 = 1K - 3K
Delay Start Circuit :
ACE1502
5
6
7
Application Note
Maximum Power Dissipation Calculation:
PD (max) =［ ( VIN (max) – VO (nom) ) ］x IO (nom) + VIN (max) x IQ
Where: VO(nom) : The nominal output voltage
IO(nom): The nominal output current and
IQ: The quiescent current the regulator consumes at IO(MAX)
VIN(max): The maximum input voltage
VER 1.2
8
ACE150X
Technology
150KHz,2A ,PWM Step-Down DC/DC Converter
ACE150X Efficiency vs. Temperature (Vin=12V,
Vout=5V,Io=2A)
ACE150X Efficiency vs. Temperature (Vin=12V,
Vout=3.3V,Io=2A)
ACE150X Saturation Voltage vs. Temperature,
(Vcc=12V, VFB=0V,VSD=0)
ACE150X Switch Current Limit vs. Temperature
(Vcc=12V, VFB=0V)
Supply Current vs. Temperature (Vcc=12V, No Load, Von/off=0V (Switch ON), Von/off=5V (Switch OFF)
VER 1.2
9
ACE150X
Technology
150KHz,2A ,PWM Step-Down DC/DC Converter
ACE150X Threshold voltage vs. Temperature,
(Vcc=12V,Io=100mA)
ACE150X ON/OFF Current vs. ON/OFF Voltage
(Vin=12V)
ACE150X Frequency vs. Temperature,
(Vcc=12V,Io=100mA, Vout=5V)
ACE150X Feedback Current vs. Temperature
(Vcc=12V,Vout=5V,VFB=1.3V)
ACE150X Output Voltage vs. Temperature,
(Vcc=12V,Io=2A)
VER 1.2 10
ACE150X
Technology
150KHz,2A ,PWM Step-Down DC/DC Converter
Frequency vs. Temperature,
(Vin=5V, Vout=15V)
Feedback Voltage vs. Temperature
(Vin=5V,Vout=15V)
Supply Current vs. Temperature
(Vin=5V, Vout=15V ; Iout=0V)
Supply Current vs. Supply Voltage
(Vout=15V;Iout=0A)
Efficiency vs. Output Current
(Vin=5V, Vout=15V)
Efficiency vs. Output Current
(Vin=3.35V;Vout=15V)
VER 1.2 11
ACE150X
Technology
150KHz,2A ,PWM Step-Down DC/DC Converter
Packing Information
8-Pin Plastic S.O.I.C.
VER 1.2 12
ACE150X
Technology
150KHz,2A ,PWM Step-Down DC/DC Converter
Notes
ACE does not assume any responsibility for use as critical components in life support devices or systems
without the express written approval of the president and general counsel of ACE Electronics Co., LTD.
As sued herein:
1. Life support devices or systems are devices or systems which, (a) are intended for surgical implant
into the body, or (b) support or sustain life, and shoes failure to perform when properly used in
accordance with instructions for use provided in the labeling, can be reasonably expected to result in
a significant injury to the user.
2. A critical component is any component of a life support device or system whose failure to perform can
be reasonably expected to cause the failure of the life support device or system, or to affect its safety
or effectiveness.
ACE Technology Co., LTD.
http://www.ace-ele.com/
VER 1.2 13
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