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参数资料
| 型号： | L4978 |
| 厂商： | STMICROELECTRONICS |
| 元件分类： | 稳压器 |
| 英文描述： | 3.5 A SWITCHING REGULATOR, 300 kHz SWITCHING FREQ-MAX, PDIP8 |
| 封装： | MINI, PLASTIC, DIP-8 |
| 文件页数： | 7/13页 |
| 文件大小： | 581K |
| 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
VCC
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
Parameter
Minidip
SO16
Unit
Rth(j-amb)
Thermal Resistance Junction to ambient
Max.
90 (*)
110 (*)
°C/W
Symbol
Parameter
Value
Unit
Minidip
S016
V5
V11
Input voltage
58
V
V4
V5,V6
Output DC voltage
Output peak voltage at t = 0.1ms f=200KHz
-1
-5
V
I4
I5,I6
Maximum output current
int. limit.
V6-V5
V12-V11
14
V
V6
V12
Bootstrap voltage
70
V
V7
V13
Analogs input voltage (VCC= 24V)
12
V
V2
V3
Analogs input voltage (VCC= 24V)
13
V
V8
V14
(VCC= 20V)
6
-0.3
V
Ptot
Power dissipation a Tamb
≤ 60°C
DIP-8
SO16
1
0.8
W
Tj,Tstg
Junction and storage temperature
-40 to 150
°C
Table 3. Pin Description (continued)
N°
Pin
Name
Function
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相关代理商/技术参数 |
参数描述 |
|---|---|
| L4978_05 | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:2A STEP DOWN SWITCHING REGULATOR |
| L4978D | 功能描述:直流/直流开关调节器 3.3 to 50V Step-Down RoHS:否 制造商:International Rectifier 最大输入电压:21 V 开关频率:1.5 MHz 输出电压:0.5 V to 0.86 V 输出电流:4 A 输出端数量: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:PQFN 4 x 5 |
| L4978D013TR | 功能描述:直流/直流开关调节器 3.3 to 50V Step-Down RoHS:否 制造商:International Rectifier 最大输入电压:21 V 开关频率:1.5 MHz 输出电压:0.5 V to 0.86 V 输出电流:4 A 输出端数量: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:PQFN 4 x 5 |
| L4979D | 功能描述:低压差稳压器 - LDO Lo DROP Vltg REG RoHS:否 制造商:Texas Instruments 最大输入电压:36 V 输出电压:1.4 V to 20.5 V 回动电压（最大值）:307 mV 输出电流:1 A 负载调节:0.3 % 输出端数量: 输出类型:Fixed 最大工作温度:+ 125 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-20 |
| L4979D_06 | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:LOW DROP VOLTAGE REGULATOR |
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