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A5970D PDF 데이터시트 ( Data , Function )
| 부품번호 | A5970D 기능 |
|
|
| 기능 | 1.5A switch step down switching regulator | ||
| 제조업체 | STMicroelectronics | ||
| 로고 |  |
||
www.DataSheet4U.com
A5970D
1.5A 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
■ Up to 1 A DC output current
■ Operating input voltage from 4.4 V to 36 V
■ Output voltage adjustable from 1.235 V to 35 V
■ Low dropout operation: 100 % duty cycle
■ 250 kHz 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
SO-8
Description
The A5970D is a step down monolithic power
switching regulator capable to deliver up to 1 A at
output voltages from 1.2 V to 35 V.
The device uses an internal P-channel D-MOS
transistor (with a typical Rdson of 250 mΩ) as
switching element to minimize the size of the
external components.
An internal oscillator fixes the switching frequency
at 250 kHz.
Having a minimum input voltage of 4.4 V only, it is
particularly suitable for 5 V bus.
Pulse by pulse current limit with the internal
frequency modulation offers an effective constant
current short circuit protection.
Figure 1. Typical application
VIN=4.4V to 35V
C1
10uF
35V
CERAMIC
C4
22nF
C3
220pF
VCC
8
COMP
4
6
R3 VREF
4k7 3.3V
OUT
1
A5970D
7
SYNCH
2
FB
5
3
GND INH
L1 33uH
D1
STPS340U
Vout=3.3V
R1
5k6
C2
100uF
10V
R2
3k3
October 2007
Rev 2
1/13
www.st.com
1
 
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Electrical data
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
A5970D
Value
40
-1 to 40
-5 to 40
int. limit.
4
-0.3 to VCC
-0.3 to 4
0.75
-40 to 150
-55 to 150
Unit
V
V
V
V
V
V
W
°C
°C
SO8
120 (1)
Unit
°C/W
4/13
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A5970D
4 Typical characteristics
Figure 3. Junction temperature vs.
output current
Figure 4. Load regulator
Tj(°C)
130
120
110
100
90
80
70
60
50
40
30
20
0.2
Vcc=5V
Tamb=25°C
0.4 0.6
0.8 1
Io(A)
Vo=3.3V
Vo=2.5V
Vo=1.8V
1.2 1.4 1.6
Vo (V)
3.312
3.308
3.304
3.3
3.296
3.292
3.288
3.284
3.28
3.276
0
Vcc = 12V
Vo = 3.3V
Tj = 25°C
Tj = 125°C
0.5 1
Io (A)
1.5
Figure 5. Junction temperature vs.
output current
Figure 6. Line regulator
Tj(°C)
130
120
110
100
90
80
70
60
50
40
30
20
Vcc=12V
Tamb=25°C
0.2 0.4 0.6
0.8 1
Io(A)
Vo=5V Vo=3.3V
Vo=2.5V
1.2 1.4 1.6
Vo (V)
3.312
3.308
3.304
Vcc =12V
Vo =3.3V
3.3
3.296
3.292
3.288
3.284
3.28
3.276
0 10
Tj =25°C
Tj =125°C
20
Vcc (V)
30
40
Figure 7. Junction temperature vs.
output current
Tj(°C)
140
120
100
80
Vcc=24V
Tamb=25°C
60
40
20
0
0.2 0.4 0.6
Vo=18V
Vo=12V
Vo=5V
0.8
Io(A)
1
1.2
1.4
Figure 8. Output voltage vs. junction
temperature
Vo (V)
1.25
1.24
1.23
1.22
1.21
1.2
-50
Vcc = 12V
Vcc=12V
0 50 100 150
Tj (°C)
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| 다운로드 | [ A5970D.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 |
| A5970D | 1.5A switch step down switching regulator | STMicroelectronics |
| DataSheet.kr | 2020 | 연락처 | 링크모음 | 검색 | 사이트맵 |