参数资料
| 型号： | LT1020ISW#TR |
| 厂商： | Linear Technology |
| 文件页数： | 6/16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
TYPICAL PERFOR A CE CHARACTERISTICS
Regulator Thermal Regulation
LT1020 Turn-On Characteristic
0.1
V IN = 15V
V OUT = 5V
5.5
5.0
V OUT = 5V
0
4.5
–0.1
50
4.0
3.5
3.0
2.5
NO LOAD
R L = 50 ?
R L = 500 ?
2.0
0
0
20 40 60 80 100 120 140 160 180
0
0
1
2
3
4
5
6
7
8
TIME (ms)
1020 G16
PI FU CTIO S
Pins 1, 14: No Internal Connection.
Pin 2: Regulator Output. Main output, requires 10 μ F
output capacitor. Can be shorted to V IN or ground without
damaging the device.
Pin 3: Input Supply. Bypass with 10 μ F capacitor. Must
always be more positive than ground.
Pin 4: Reference. 2.5V can source or sink current. May be
shorted to ground or up to 5V. Voltages in excess of 5V can
damage the device.
Pin 5: Comparator PNP Output. Open Collector PNP
Output. Pull-up current source for the comparator. May be
connected to any voltage from V IN to 36V more negative
than V IN (operates below ground). Short-circuit protected.
For example, if V IN is 6V then pin 5 will operate to – 30V.
Pin 6: Comparator NPN Output. Open Collector NPN
Output. May be connected to any voltage from ground to
INPUT VOLTAGE (V)
1020 G17
Pin 9: Ground.
Pin 10: Current Limit. Connecting this pin to ground
decreases the regulator current limit to 3mA minimum.
Leave open when not used.
Pin 11: Feedback. This is the feedback point of the regu-
lator. When operating, it is nominally at 2.5V. Optimum
source resistance is 200k to 500k. The feedback pin
should not be driven below ground or more positive than
5V.
Pin 12: Shutdown. Turns output off.
Pin 13: Dropout Detector. This pin acts like a current
source from V IN which turns on when the output transistor
goes into saturation. The magnitude of the current de-
pends on the magnitude of the output current and the
input/output voltage differential. Pin current ranges from
5 μ A to about 300 μ A.
36V more positive than ground (operates above V IN ).
Short-circuit protected.
Pins 7, 8: Comparator Inputs. Operates from ground to
V IN – 1V. Comparator inputs will withstand 36V even with
V IN of 0V.
sn1020 1020fcs
6
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