參數(shù)資料
型號(hào): L4978
廠商: 意法半導(dǎo)體
英文描述: 2A Step Down Switching Regulator(步降開關(guān)穩(wěn)壓器)
中文描述: 第2A降壓開關(guān)穩(wěn)壓器(步降開關(guān)穩(wěn)壓器)
文件頁數(shù): 3/13頁
文件大?。?/td> 577K
代理商: L4978
3/13
L4978
(*) Pins 1, 7, 8, 9, 10, 15 and 16 are not internally, electrically connected to the die.
Table 4. Thermal Data
(*) Package mounted on board.
Table 5. Absolute Maximum Ratings
4
5, 6
OUT
Stepdown regulator output
5
11
V
CC
Unregulated DC input voltage
6
12
BOOT
A capacitor connected between this pin and OUT allows to drive the internal DMOS
Transistors
7
13
COMP
E/A output to be used for frequency compensation
8
14
FB
Stepdown feedback input. Connecting directly to this pin results in an output voltage
of 3.3V. An external resistive divider is required for higher output voltages.
Symbol
R
th(j-amb)
Parameter
Minidip
90 (*)
SO16
110 (*)
Unit
°C/W
Thermal Resistance Junction to ambient
Max.
Symbol
Parameter
Value
Unit
Minidip
V
5
V
4
S016
V
11
Input voltage
58
V
V
5
,
V
6
Output DC voltage
Output peak voltage at t = 0.1ms f=200KHz
-1
-5
V
V
I
4
I
5
,I
6
V
12
-V
11
V
12
V
13
V
3
V
14
Maximum output current
int. limit.
V
6
-V
5
V
6
V
7
V
2
V
8
14
V
Bootstrap voltage
70
V
Analogs input voltage (V
CC
= 24V)
12
V
Analogs input voltage (V
CC
= 24V)
13
V
V
V
(VCC= 20V)
6
-0.3
P
tot
Power dissipation a Tamb
60°C
DIP-8
SO16
1
0.8
W
W
°C
T
j
,T
stg
Junction and storage temperature
-40 to 150
Table 3. Pin Description
(continued)
Pin
Name
Function
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L4978_05 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:2A STEP DOWN SWITCHING REGULATOR
L4978D 功能描述:直流/直流開關(guān)調(diào)節(jié)器 3.3 to 50V 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
L4978D013TR 功能描述:直流/直流開關(guān)調(diào)節(jié)器 3.3 to 50V 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
L4979D 功能描述:低壓差穩(wěn)壓器 - LDO Lo DROP Vltg REG RoHS:否 制造商:Texas Instruments 最大輸入電壓:36 V 輸出電壓:1.4 V to 20.5 V 回動(dòng)電壓(最大值):307 mV 輸出電流:1 A 負(fù)載調(diào)節(jié):0.3 % 輸出端數(shù)量: 輸出類型:Fixed 最大工作溫度:+ 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-20
L4979D_06 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:LOW DROP VOLTAGE REGULATOR