参数资料
型号: LP2951CD
厂商: ON Semiconductor
文件页数: 12/22页
文件大小: 0K
描述: IC REG LDO 5V/ADJ .1A 8SOIC
产品变化通告: Product Discontinuation 27/Jun/2007
标准包装: 98
稳压器拓扑结构: 正,固定式或可调式
输出电压: 5V,1.25 V ~ 29 V
输入电压: 最高 30V
电压 - 压降(标准): 0.35V @ 100mA
稳压器数量: 1
电流 - 输出: 100mA
工作温度: -40°C ~ 125°C
安装类型: 表面贴装
封装/外壳: 8-SOIC(0.154",3.90mm 宽)
供应商设备封装: 8-SOICN
包装: 管件
LP2950, LP2951, NCV2951
+V in
8
#1
V O T
NC
5
3
V in
Error V out
SNS
LP2951CN
SD
1
2
6
D1
D2
1.0 m F
Memory
V+
20
3.6 V
NiCad
GND FB
4 7
27 k
D3
Early Warning
All diodes are 1N4148.
Q1
2.7 M
D4
Reset
V DD
m P
Early Warning flag on low input voltage.
Main output latches off at lower input voltages.
#2
V O T
2N3906
330 k
5
3
8
V in
Error V out
SNS
LP2951CN
SD
GND FB
1
2
6
Main
Output
1.0 m F
Battery backup on auxiliary output.
Operation: Regulator #1’s V out is programmed one
diode drop above 5.0 V. Its error flag becomes active
when V in < 5.7 V. When V in drops below 5.3 V, the
error flag of regulator #2 becomes active and via Q1
latches the main output “off”. When V in again exceeds
5.7 V, regulator #1 is back in regulation and the early
warning signal rises, unlatching regulator #2 via D3.
4
7
Figure 25. Regulator with Early Warning and Auxiliary Output
Current Limit
Section
+V in
680
2N3906
470
0.05
1000 m F
2N3906
MJE2955
10 k
.33 m F
4.7 M
8
Error
Flag
5
Error
V in
V out
1
V O T
220
3
SNS
LP2951CN
SD
2
NC
6 NC
47
4.7 m F
Tant
V out @ 2.0 A
100 m F
20 k
GND FB
.01 m F
R1
4 7
0.033 m F
R2
V out = 1.25V (1.0 + R1/R2)
For 5.0 V output, use internal resistors. Wire Pin 6 to 7,
and wire Pin 2 to +V out Bus.
Figure 26. 2.0 A Low Dropout Regulator
http://onsemi.com
12
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LP2951CD-3.0R2 功能描述:低压差稳压器 - LDO 3V 100mA Low Power 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