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A7142 데이터시트 PDF




AiT Semiconductor에서 제조한 전자 부품 A7142은 전자 산업 및 응용 분야에서
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부품번호 A7142 기능
기능 WIDE INPUT RANGE STEP-DOWN DC-DC CONVERTER
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A7142 데이터시트, 핀배열, 회로
AiT Semiconductor Inc.
www.ait-ic.com
A7142
DC-DC CONVERTER/ BUCK (STEP-DOWN)
150KHz, 2A PWM BUCK DC-DC CONVERTER
DESCRIPTION
FEATURES
The A7142 series of regulators are monolithic 5V and adjustable output versions
integrated circuits that provide all the active functions Adjustable version output voltage range 1.23V
for a step-down (buck) switching regulator, capable of
to 37V
driving a 2A load with excellent line and load Input voltage range up to 40V
regulation. These devices are available in fixed output Guaranteed 2A output current
voltage of 5V and adjustable output version.
150KHz fixed frequency internal oscillator
Built-in thermal shutdown and current limit
The A7142 operates at a switching frequency of
protection
150KHz thus allowing smaller sized filter components Available in SOP8 and PSOP8 Packages
than what would be needed with lower frequency
switching regulators.
APPLICATION
Other features include a guaranteed ±3% tolerance
on output voltage under specified input voltage and
output load conditions, and ±15% on the oscillator
frequency. External shutdown is included, featuring
typically 100μA standby current.
Fixed voltage power supply for LCD monitor
and LCD TV
On-Card switching regulation
Simple high efficiency Step-down regulator
The A7142 is available in SOP8 and PSOP8
packages.
TYPICAL APPLICATION
ORDERING INFORMATION
Package Type
Part Number
SOP8
A7142M8R-XX
M8
A7142M8VR-XX
PSOP8
MP8
A7142MP8R-XX
A7142MP8VR-XX
XX: 50=5.0V, ADJ=Adjustable
Note
R: Tape & Reel
V: Halogen free Package
AiT provides all RoHS products
Suffix V means Halogen free Package
A7142-50 (Fixed Output)
REV1.1
- MAY 2009 RELEASED, JUL 2012 UPDATED -
-1-




A7142 pdf, 반도체, 판매, 대치품
AiT Semiconductor Inc.
www.ait-ic.com
A7142
DC-DC CONVERTER/ BUCK (STEP-DOWN)
150KHz, 2A PWM BUCK DC-DC CONVERTER
ELECTRICAL CHARACTERISTICS
Unless otherwise specified, These specifications apply VIN = 12V for 5.0V options, and VIN = 24V for ADJ
option, and the operating ambient temperatures TA = 25°C
Parameter
Symbol
Conditions
Min. Typ. Max. Unit
Output VoltageNOTE1
VOUT
4.5VVIN40V
0.2AIOUT2A
7VVIN40V
0.2AIOUT2A
ADJ 1.193 1.230 1.267
5.0 4.850 5.000 5.150
V
Efficiency
VIN=12V, ILOAD=2A
η
VIN=12V, ILOAD=2A
ADJ
5.0
90
80
%
VFB=1.3V
Feedback Bias Current
IB
(Adjustable Version Only)
10 50 nA
Saturation Voltage
VSAT
IOUT=2ANOTE3,4
1.16 1.4
V
Duty Cycle (ON)
DC NOTE4
100 %
Duty Cycle (OFF)
DC NOTE5
0%
Oscillator Frequency
fO NOTE6
127 150 173 KHz
Output Leakage
Current
Output=0VNOTE3,5
IL
Output=-0.9VNOTE7
100 μA
2 mA
Quiescent Current
IQ NOTE5
5 mA
Standby Current
ISTBY SD Pin=5V
100 200 μA
VIH Low (ON)
1.3
SD Pin Input Level
VIL High (OFF)
IH VLEVEL= 2.5V (OFF)
2.0 1.4
5
IL VLEVEL= 0.5V (ON)
0.02
NOTE3: No diode, inductor or capacitor connected to output pin.
NOTE4: Feedback pin removed from output and connected to 0V to force the output transistor switch ON.
NOTE5: Feedback pin removed from output and connected to 5V and the ADJ version
NOTE6: The switching frequency is reduced when the second stage current limit is activated.
NOTE7: VIN = 40V.
0.6
15
5
V
μA
REV1.1
- MAY 2009 RELEASED, JUL 2012 UPDATED -
-4-

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A7142 전자부품, 판매, 대치품
AiT Semiconductor Inc.
www.ait-ic.com
BLOCK DIAGRAM
A7142
DC-DC CONVERTER/ BUCK (STEP-DOWN)
150KHz, 2A PWM BUCK DC-DC CONVERTER
REV1.1
- MAY 2009 RELEASED, JUL 2012 UPDATED -
-7-

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부품번호상세설명 및 기능제조사
A7142

WIDE INPUT RANGE STEP-DOWN DC-DC CONVERTER

AiT Semiconductor
AiT Semiconductor

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