|
|
|
부품번호 | L5972D013TR 기능 |
|
|
기능 | 2A SWITCH STEP DOWN SWITCHING REGULATOR | ||
제조업체 | STMicroelectronics | ||
로고 | |||
전체 10 페이지수
L5972D
2A SWITCH STEP DOWN SWITCHING REGULATOR
s 2A INTERNAL SWITCH
s OPERATING INPUT VOLTAGE FROM 4.4V
TO 36V
s OUTPUT VOLTAGE ADJUSTABLE FROM
1.235V TO 35V
s LOW DROPOUT OPERATION: 100% DUTY
CYCLE
s 250KHz INTERNALLY FIXED FREQUENCY
s VOLTAGE FEEDFORWARD
s ZERO LOAD CURRENT OPERATION
s INTERNAL CURRENT LIMITING
s PROTECTION AGAINST FEEDBACK
DISCONNECTION
s THERMAL SHUTDOWN
APPLICATIONS:
s CONSUMER: STB, DVD, TV, VCR,CAR
RADIO, LCD MONITORS
s NETWORKING: XDSL, MODEMS,DC-DC
MODULES
s COMPUTER: PRINTERS, AUDIO/GRAPHIC
CARDS, OPTICAL STORAGE, HARD DISK
DRIVE
s INDUSTRIAL: CHARGERS, CAR BATTERY
DC-DC CONVERTERS
SO8 (4+2+2)
ORDERING NUMBERS: L5972D (SO8)
L5972D013TR (Tape & Reel)
DESCRIPTION
The L5972D is a step down monolithic power switch-
ing regulator with a minimum switch current limit of
2A so it is able to deliver more than 1.5A DC current
to the load depending on the application conditions.
The output voltage can be set from 1.235V to 35V.
The device uses an internal P-Channel D-MOS tran-
sistor (with a typical Rdson of 250mΩ) as switching
element to minimize the size of the external compo-
nents.
An internal oscillator fixes the switching frequency at
250KHz.
Having a minimum input voltage of 4.4V only, it is
particularly suitable for 5V bus, available in all com-
puter related applications.
Pulse by pulse current limit with the internal frequen-
cy modulation offers an effective constant current
short circuit protection.
TEST APPLICATION CIRCUIT
VIN = 4.4V to 35V
VCC
8
C1
10µF
35V
CERAMIC
COMP
C4
22nF
4
6
C3
220pF
R3
4.7K
L5972D
OUT
1
L1 33µH
D1
STPS2L40U
5
237
FB
GND
VOUT=3.3V
R1
5.6K
R2
3.3K
C2
100µF
10V
May 2003
D03IN1436
1/10
L5972D
Figure 1. Output Voltage vs. Junction
Temperature
Vo (V)
3.312
3.308
3.304
3.3
Vcc = 12V
Vo = 3.3V
Tj = 25°C
3.296
3.292
3.288
3.284
Tj = 125°C
3.28
3.276
0
0.5 1
Io (A)
1.5
Figure 2. Line Regulation
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 3. 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)
Figure 4. Quiescent Current vs. Junction
Iq (mA)
2
1.8
1.6
Vcc = 12V
DC = 0%
1.4
1.2
-50
0 50 100 150
Tj (°C)
Figure 5. Shutdown Current vs.Junction
Temperature
Ishd (µA)
70
60
Vcc = 12V
50
40
30
-50
0 50 100 150
Tj (°C)
Figure 6. Switching Frequency vs.Junction
Temperature
Iq (mA)
2
1.8
1.6
Vcc = 12V
DC = 0%
1.4
1.2
-50
0 50 100 150
Tj (°C)
4/10
4페이지 Figure 11. Junction Temperature vs. Output
Current
TJ(°C)
100.0
90.0 Vin=5V
Tamb.=25 °C
80.0
Vo=2.5V Vo=3.3V
70.0 Vo=1.8V
60.0
50.0
40.0
30.0
20.0
0.2 0.4 0.6 0.8
1 1.2 1.4 1.6 1.8
Io(A)
2
Figure 12. Junction Temperature vs. Output
Current
TJ(°C)
100.0
90.0
80.0
70.0
Vin=12V
Tamb= 25°C
Vo=5V Vo=3.3V
60.0
Vo=2.5V
50.0
40.0
30.0
20.0
0.2 0.4 0.6 0.8
1 1.2 1.4 1.6 1.8
Io(A)
2
L5972D
Figure 13. Efficiency vs. Output Current
95
93
91 Vo=3.3V
89
87
85
Vo=2.5V
83
81
79 Vo=1.8V
77
75
73 Vcc=5V
71
69
67
0.1 0.3 0.5 0.7 0.9 1.1 1.3 1.5 1.7
Io (A)
Figure 14. Efficiency vs. Output Current
96
94
92 Vo=5V
90
88 Vo=3.3V
86
84
82
80 Vo=2.5V
78
76
74 Vin=12V
72
70
0.1 0.3 0.5 0.7 0.9 1.1 1.3 1.5 1.7
Io (A)
7/10
7페이지 | |||
구 성 | 총 10 페이지수 | ||
다운로드 | [ L5972D013TR.PDF 데이터시트 ] |
당사 플랫폼은 키워드, 제품 이름 또는 부품 번호를 사용하여 검색할 수 있는 |
구매 문의 | 일반 IC 문의 : 샘플 및 소량 구매 ----------------------------------------------------------------------- IGBT, TR 모듈, SCR 및 다이오드 모듈을 포함한 광범위한 전력 반도체를 판매합니다. 전력 반도체 전문업체 상호 : 아이지 인터내셔날 사이트 방문 : [ 홈페이지 ] [ 블로그 1 ] [ 블로그 2 ] |
부품번호 | 상세설명 및 기능 | 제조사 |
L5972D013TR | 2A SWITCH STEP DOWN SWITCHING REGULATOR | STMicroelectronics |
DataSheet.kr | 2020 | 연락처 | 링크모음 | 검색 | 사이트맵 |