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參數(shù)資料
| 型號： | L4973D5.1 |
| 廠商： | 意法半導(dǎo)體 |
| 英文描述： | 3.5A Step Down Switching Regulator(3.5A步降開關(guān)穩(wěn)壓器) |
| 中文描述： | 3.5A的降壓開關(guān)穩(wěn)壓器（3.5A的步降開關(guān)穩(wěn)壓器） |
| 文件頁數(shù)： | 3/16頁 |
| 文件大?。?/td> | 252K |
| 代理商： | L4973D5.1 |
PIN FUNCTIONS
Powerdip
11
10
SO20
12
11
NAME
COMP
INH
DESCRIPTION
E/A output to be used for frequency compensation
A logic signal (active high) disables the device (sleep mode operation).
If not used it must be connected to GND; if floating the device is disabled.
A capacitor connected between this pin and the output allows to drive the
internal D-MOS.
Input/Output synchronization.
Unregulated DC input voltage
Stepdown regulator output.
Stepdown feedback input. Connecting the output directly to this pin results
in an output voltage of 3.3V for the L4973V3.3 and 5.1V. An external
resistive divider is required for higher output voltages. For output voltage
less than 3.3V, see note ** and Figure 32.
Reference voltage externally available.
Signal ground
9
10
BOOT
18
7,8
2,3
12
20
8,9
2,3
13
SYNC
Vcc
OUT
VFB
16
18
V5.1
GND
4,5,6
13,14,15
1
4,5,6,7
14,15,16,17
1
OSC
An external resistor connected between the unregulated input voltage and
Pin 1 and a capacitor connected from Pin 1 to ground fixes the switching
frequency. (Line feed forward is automatically obtained)
ABSOLUTE MAXIMUM RATINGS
Symbol
Parameter
Value
Unit
DIP-18
V
7
,V
8
V
2
,V
3
S0-20
V
9
,V
8
V
2
,V
3
Input voltage
Output DC voltage
Output peak voltage at t = 0.1
μ
s f=200KHz
Maximum output current
58
-1
-5
V
V
V
I
2
,I
3
I
2
,I
3
int. limit.
V
9
-V
8
V
9
V
11
,V
17
V
12
V
10
-V
8
V
10
V
12
,V
19
V
13
14
70
12
6
-0.3
5.5
-0.3
Vcc
-0.3
5
1.3
2
4
V
V
V
V
V
V
V
V
V
W
W
W
W
°
C
Bootstrap voltage
Analogs input voltage (V
CC
= 24V)
(V
CC
= 20V)
V
18
V
20
(V
CC
= 20V)
V
10
V
11
Inhibit
P
tot
Power dissipation a T
pins
≤
90
°
C
(T
amb
= 70
°
C no copper area)
(T
amb
= 70
°
C 4cm copper area on PCB)
Power dissipation a T
pins
= 90
°
C
Junction and storage temperature
DIP
12+3+3
SO20
T
J
,T
STG
-40 to 150
THERMAL DATA
Symbol
R
th(j-pin)
R
th(j-amb)
Parameter
Powerdip
12
60 (*)
SO20
15
80 (*)
Unit
°
C/W
°
C/W
Thermal Resistance Junction to pin Max.
Thermal Resistance to Ambient Max.
(*) Package mounted on board.
L4973V3 - L4973V5 - L4973D3 - L4973D5
3/16
相關(guān)PDF資料 |
PDF描述 |
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| L4973V5.1 | 3.5A Step Down Switching Regulator(3.5A步降開關(guān)穩(wěn)壓器) |
| L4974A | Power Switching Regulator(功率開關(guān)穩(wěn)壓器) |
| L4975A | Power Switching Regulator(功率開關(guān)穩(wěn)壓器) |
| L4976 | 1A Step Down Switching Regulator(步降開關(guān)穩(wěn)壓器) |
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| L4973V3 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:3.5A STEP DOWN SWITCHING REGULATOR |
| L4973V3.3 | 功能描述:直流/直流開關(guān)調(diào)節(jié)器 3.3V 3.5A Step-Down RoHS:否 制造商:International Rectifier 最大輸入電壓:21 V 開關(guān)頻率:1.5 MHz 輸出電壓:0.5 V to 0.86 V 輸出電流:4 A 輸出端數(shù)量: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:PQFN 4 x 5 |
| L4973V3.3-L4973V5.1 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:3.5A STEP DOWN SWITCHING REGULATOR |
| L4973V33 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:3.5A STEP DOWN SWITCHING REGULATOR |
| L4973V33-L4973V51 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:3.5A STEP DOWN SWITCHING REGULATOR |
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