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A5973D PDF 데이터시트 ( Data , Function )
| 부품번호 | A5973D 기능 |
|
|
| 기능 | 2.5A switch step down switching regulator | ||
| 제조업체 | STMicroelectronics | ||
| 로고 |  |
||
www.DataSheet4U.com
A5973D
2.5A switch step down switching regulator
for automotive applications
Features
■ Qualified following the AEC-Q100
requirements (temperature Grade 3), see
PPAP for more details.
■ Temperature range -40°C to 85°C
HSOP8 exposed pad
■ 2A DC output current
■ Operating input voltage from 4V to 36V
Description
■ 3.3V / (±2%) reference voltage
■ Output voltage adjustable from 1.235V to 35V
■ Low dropout operation: 100% duty cycle
■ 250kHz Internally fixed frequency
■ Voltage feedforward
■ Zero load current operation
■ Internal current limiting
■ Inhibit for zero current consumption
■ Synchronization
■ Protection against feedback disconnection
■ Thermal shutdown
Applications
■ Dedicated to automotive applications
Figure 1. Typical application
The A5973D is a step down monolithic power
switching regulator with a minimum switch current
limit of 2.5A so it is able to deliver more than 2A
DC current to the load depending on the
application conditions. The output voltage can be
set from 1.235V to 35V. The high current level is
also achieved thanks to an SO8 package with
exposed frame, that allows to reduce the
Rth(JA) down to approximately 40°C/W. The
device uses an internal P-channel D-MOS
transistor (with a typical Rdson of 250mΩ) as
switching element to minimize the size of the
external components. An internal oscillator fixes
the switching frequency at 250kHz. Having a
minimum input voltage of 4V only, it is particularly
suitable for 5V bus. Pulse by pulse current limit
with the internal frequency modulation offers an
effective constant current short circuit protection.
Pulse by pulse current limit with the internal
frequency modulation offers an effective constant
current short circuit protection.
VIN=4V to 35V
VCC
8
OUT
1
L1 15uH
Vout=3.3V
C1
10uF
35V
CERAMIC
C4
22nF
C3
220pF
COMP
4
6
R3 VREF
4k7 3.3V
A5973D
7
SYNCH
2
FB
5
3
GND INH
D1
STPS340U
R1
5k6
C2
330uF
6.3V
R2
3k3
October 2007
Rev 2
1/14
www.st.com
1
 
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A5973D
2 Electrical data
2.1
Maximum ratings
Table 2. Absolute maximum ratings
Symbol
Parameter
V8
V1
I1
V4 , V5
V3
V2
PTOT
TJ
TSTG
Input voltage
OUT pin DC voltage
OUT pin peak voltage at ∆t=0.1µs
Maximum output current
Analog pins
INH
SYNCH
Power dissipation at TA ≤ 70°C
Operating junction temperature range
Storage temperature range
2.2
Thermal data
Table 3. Thermal data
Symbol
Parameter
RthJA
Maximum thermal resistance junction-ambient
1. Package mounted on board
Electrical data
Value
40
-1 to 40
-5 to 40
int. limit.
4
-0.3 to VCC
-0.3 to 4
2.25
-40 to 150
-55 to 150
Unit
V
V
V
V
V
V
W
°C
°C
SO8
40 (1)
Unit
°C/W
4/14
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A5973D
4 Typical characteristics
Typical characteristics
Figure 2. Line regulatior
Figure 3. Output voltage vs. junction
temperature
Figure 4. Quiescent current vs.
junction temperature
Figure 5. Shutdown current vs.
junction temperature
7/14
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| 다운로드 | [ A5973D.PDF 데이터시트 ] | 구매 문의 | 일반 IC 문의 : 샘플 및 소량 구매 ----------------------------------------------------------------------- 전력 반도체 판매 ( IGBT, TR 모듈, SCR, 다이오드 모듈 ) 상호 : 아이지 인터내셔날 사이트 방문 : [ 홈페이지 ] [ 블로그 1 ] [ 블로그 2 ] |
관련 데이터시트
| 부품번호 | 상세설명 및 기능 | 제조사 |
| A5973D | 2.5A switch step down switching regulator | STMicroelectronics |
| DataSheet.kr | 2020 | 연락처 | 링크모음 | 검색 | 사이트맵 |