- 您现在的位置：买卖IC网 > PDF目录97994 > L4977A (STMICROELECTRONICS) 11 A SWITCHING REGULATOR, 500 kHz SWITCHING FREQ-MAX, PZFM15 PDF资料下载
参数资料
| 型号： | L4977A |
| 厂商： | STMICROELECTRONICS |
| 元件分类： | 稳压器 |
| 英文描述： | 11 A SWITCHING REGULATOR, 500 kHz SWITCHING FREQ-MAX, PZFM15 |
| 封装： | PLASTIC, POWER PACK-15 |
| 文件页数： | 18/21页 |
| 文件大小： | 6754K |
| 代理商： | L4977A |
ELECTRICAL CHARACTERISTICS (Refer to the test circuit, Tj = 25
°C, Vi = 35V, R4 = 16K,
C9 = 2.2nF, fSW = 200KHz typ, unless otherwise specified)
DYNAMIC CHARACTERISTICS
Symbol
Parameter
Test Condition
Min.
Typ.
Max.
Unit
Fig.
Vi
input Voltage Range (pin 9)
Vo = Vref to 40V
Io = 7A
15
50
V
5
Vo
Output Votage
Vi = 15V to 50V
Io = 3A; Vo = Vref
5
5.1
5.2
V
5
Vo
Line Regulation
Vi = 15V to 50V
Io = 2A; Vo = Vref
12
30
mV
5
Vo
Load Regulation
Vo = Vref
Io = 3A to 5A
Io = 2A to 7A
10
20
25
40
mV
5
Vd
Dropout Voltage Between
Pin 9 and 7
Io = 5A
Io = 7A
0.4
0.8
0.6
1.1
V
5
I7L
Max. Limiting Current
Vo = Vref to 40V
Vi = 15 to 50V
89.5
11
A
5
η
Efficiency
Io = 3A
Vo = Vref
Vo = 12V
70
75
80
%
5
Io = 7A
Vo = Vref
Vo = 12V
75
80
87
%
5
SVR
Supply Voltage Ripple
Reject.
Vi = 2VRMS; Io = 3A
f = 100Hz; Vo = Vref
56
60
dB
5
f
Switching Frequency
180
200
220
KHz
5
f
Vi
Voltage Stability of
Swiching Frequency
Vi = 15V to 45V
2
6
%
5
f
Tj
Temperature Stability of
Swiching Frequency
Tj = 0 to 125
°C1
%
5
fmax
Maximum Operating
Switching Frequency
Vo = Vref; R4 = 10K
Io = 7A; C9 = 1nF
500
KHz
5
Vref SECTION (pin 14)
Symbol
Parameter
Test Condition
Min.
Typ.
Max.
Unit
Fig.
V14
Reference Voltage
5
5.1
5.2
V
7
V14
Line Regulation
Vi = 15V to 50V
10
25
mV
7
V14
Load Regulation
I14 = 0 to 1mA
20
40
mV
7
V14
T
Average Temperature
Coefficient Reference
Voltage
Tj = 0
°C to 125°C
0.4
mV/
°C7
I14 short
Short Circuit Current Limit
V14 = 0
70
mA
7
VSTART SECTION (pin 15)
Symbol
Parameter
Test Condition
Min.
Typ.
Max.
Unit
Fig.
V15
Reference Voltage
11.4
12
12.6
V
7
V15
Line Regulation
Vi = 15 to 50V
0.6
1.4
V
7
V15
Load Regulation
I15 = 0 to 1mA
50
200
mV
7
I15 short
Short Circuit Current Limit
V15 = 0V
80
mA
7
L4977A
6/21
相关PDF资料 |
PDF描述 |
|---|---|
| L4978D013TR | 3.5 A SWITCHING REGULATOR, 300 kHz SWITCHING FREQ-MAX, PDSO16 |
| L4978 | 3.5 A SWITCHING REGULATOR, 300 kHz SWITCHING FREQ-MAX, PDIP8 |
| L497B | SPECIALTY ANALOG CIRCUIT, PDIP16 |
| L4981BD013TR | 2 A POWER FACTOR CONTROLLER, 115 kHz SWITCHING FREQ-MAX, PDSO20 |
| L4985D | 1.5 A SWITCHING REGULATOR, 83 kHz SWITCHING FREQ-MAX, PDSO20 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| L4977HT | 制造商:未知厂家 制造商全称:未知厂家 功能描述:Voltage-Mode SMPS Controller |
| L4978 | 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 |
| 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 |
发布紧急采购，3分钟左右您将得到回复。