参数资料
| 型号： | LT1020ISW#TR |
| 厂商： | Linear Technology |
| 文件页数： | 7/16页 |
| 文件大小： | 0K |
| 描述： | IC REG LDO ADJ 125MA 16SOIC |
| 标准包装： | 1,000 |
| 稳压器拓扑结构： | 正，可调式 |
| 输出电压： | 可调 |
| 输入电压： | 4.5 V ~ 36 V |
| 电压 - 压降（标准）： | 0.4V @ 125mA |
| 稳压器数量： | 1 |
| 电流 - 输出： | 125mA（最小） |
| 工作温度： | 0°C ~ 100°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 16-SOIC（0.295"，7.50mm 宽） |
| 供应商设备封装： | 16-SOIC |
| 包装： | 带卷 (TR) |
LT1020
BLOCK DIAGRA
REF OUT 4
10
CURRENT
LIMIT
3
V IN
–
2
V OUT
PNP OUT
NPN OUT
5
6
13
DROPOUT
DETECTOR
+
REF
NON-
INVERTING
INVERTING
7
8
2.5V
11 FB
9
GND
1020 BD
APPLICATIO S I FOR ATIO
The LT1020 is especially suited for micropower system
applications. For example, the comparator section of the
LT1020 may be used as a battery checker to provide an
indication of low battery. The dropout detector can shut
down the system when the battery voltage becomes too
low to regulate. Another type of system application for the
LT1020 would be to generate the equivalent of split
supplies from a single power input. The regulator section
provides regulated output voltage and the reference, which
can both source and sink current, is then an artificial
system ground providing a split supply for the system.
For many applications the comparator can be frequency
compensated to operate as an amplifier. Compensation
values for various gains are given in the data sheet. The
comparator gain is purposely low to make it easier to
frequency compensate as an amplifier. Two outputs are
available on the comparator, the NPN output is capable of
sinking 10mA and can drive loads connected to voltages
in excess of the positive power supply. This is useful for
driving switches or linear regulators from a higher input
voltage. The PNP output, which is capable of sourcing
100 μ A can drive loads below ground. It can be used to
make negative regulators with the addition of an external
pass transistor. Both outputs can be tied together to
provide an output that swings from rail-to-rail for com-
parator or amplifier applications. Although it is not speci-
fied, the gain for the PNP output is about 500 to 1000.
If the PNP output is being used, to maximize the gain a 1 μ A
to 5 μ A load should be placed upon the NPN output
collector. This is easily done by connecting a resistor
between the NPN collector and the reference output.
(Providing this operating current to the NPN side in-
creases the internal emitter base voltages and maximizes
the gain of the PNP stage.) Without this loading on the
NPN collector, at temperatures in excess of 75 ° C, the gain
of the PNP collector can decrease by a factor of 2 or 3.
Reference
Internal to the LT1020 is a 2.5V trimmed class B output
reference. The reference was designed to be able to source
or sink current so it could be used in supply splitting
applications as well as a general purpose reference for
external circuitry. The design of the reference allows it to
source typically 4mA or 5mA and sink 2mA. The available
source and sink current decreases as temperature in-
creases. It is sometimes desirable to decrease the AC
output impedance by placing an output capacitor on them.
The reference in the LT1020 becomes unstable with large
capacitive loads placed directly on it. When using an
output capacitor, about 20 ? should be used to isolate the
capacitor from the reference pin. This 20 ? resistor can be
placed directly in series with the capacitor or alternatively
the reference line can have 20 ? placed in series with it and
then a capacitor to ground. This is shown in Figure 1. Other
sn1020 1020fcs
7
相关PDF资料 |
PDF描述 |
|---|---|
| LT1026IS8#TRPBF | IC REG SWITCHD CAP DBL INV 8SOIC |
| LT1033CP | IC REG LDO NEG ADJ TO3P-3 |
| LT1054MJ8 | IC REG SWITCHD CAP DBL INV 8-DIP |
| LT1071CK | IC REG MULTI CONFIG ADJ TO220-5 |
| LT1072CSW#PBF | IC REG MULTI CONFIG ADJ 16SOIC |
相关代理商/技术参数 |
参数描述 |
|---|---|
| LT1020MJ | 制造商:Linear Technology 功能描述:LDO Regulator Pos 0.125A 14-Pin CDIP |
| LT1020MJ883C | 制造商:LT 功能描述:New |
| LT1021BCH-5 | 功能描述:IC VREF SERIES BURIED ZENER TO-5 RoHS:否 类别:集成电路 (IC) >> PMIC - 电压基准 系列:- 标准包装:2,000 系列:- 基准类型:旁路，可调节，精度 输出电压:1.24 V ~ 16 V 容差:±0.5% 温度系数:- 输入电压:1.24 V ~ 16 V 通道数:1 电流 - 阴极:100µA 电流 - 静态:- 电流 - 输出:20mA 工作温度:-40°C ~ 85°C 安装类型:通孔 封装/外壳:TO-226-3、TO-92-3（TO-226AA）成形引线 供应商设备封装:TO-92-3 包装:带卷 (TR) |
| LT1021BCN8-10 | 功能描述:IC VREF SERIES SHUNT ZNR 8-PDIP RoHS:否 类别:集成电路 (IC) >> PMIC - 电压基准 系列:- 标准包装:2,000 系列:- 基准类型:旁路，可调节，精度 输出电压:1.24 V ~ 16 V 容差:±0.5% 温度系数:- 输入电压:1.24 V ~ 16 V 通道数:1 电流 - 阴极:100µA 电流 - 静态:- 电流 - 输出:20mA 工作温度:-40°C ~ 85°C 安装类型:通孔 封装/外壳:TO-226-3、TO-92-3（TO-226AA）成形引线 供应商设备封装:TO-92-3 包装:带卷 (TR) |
| LT1021BCN8-10#PBF | 功能描述:IC VREF SERIES SHUNT ZNR 8-PDIP RoHS:是 类别:集成电路 (IC) >> PMIC - 电压基准 系列:- 标准包装:3,000 系列:- 基准类型:旁路，精度 输出电压:3V 容差:±0.5% 温度系数:100ppm/°C 输入电压:- 通道数:1 电流 - 阴极:82µA 电流 - 静态:- 电流 - 输出:15mA 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:6-TSSOP（5 引线），SC-88A，SOT-353 供应商设备封装:SC-70-5 包装:带卷 (TR) 其它名称:296-20888-2 |
发布紧急采购，3分钟左右您将得到回复。