UTC LD3870
LINEAR INTEGRATED CIRCUIT
LOW DROPOUT VOLTAGE
REGULATOR
DESCRIPTION
The UTC LD3870 is low dropout voltage regulator
designed for cellular phone application.
1
2
3
FEATURES
* High Ripple Rejection: 56dB鈮R(DC<f<60kHz)
66dB typ. (f=100Hz)
60dB typ. (f=1kHz)
* Output Noise Voltage: Vno=30螠V , Cp=0.01渭F
* Output Current: Io(max)=150mA
* High Precision Output: Vo鹵2%
* Low Dropout Voltage:
鈻砎
l
-o=0.12V typ.
(Io=60mA,Vo鈮?.8V)
* Input Voltage range: +2~+14V(Vo=1.5V Version)
* ON/OFF Control: Active High
* Output capacitor with 4.7uF ceramic capacitor
* Internal Short Circuit Current Limit
* Internal Thermal Overload Protection
5
4
SOT-25
1:CONTROL(Active High)
3:NOISE BYPASS
4:V
OUT
2:GND
5: V
IN
MARKING INFORMATION
PART
NUMBER
LD3870-1.5V
LD3870-1.8V
LD3870-1.9V
LD3870-2.0V
LD3870-2.1V
LD3870-2.3V
LD3870-2.4V
LD3870-2.5V
LD3870-2.6V
LD3870-2.7V
LD3870-2.8V
LD3870-2.85V
LD3870-2.9V
LD3870-3.0V
VOLTAGE
1.5V
1.8V
1.9V
2.0V
2.1V
2.3V
2.4V
2.5V
2.6V
2.7V
2.8V
2.85V
2.9V
3.0V
VOLATGE
CODE
15
18
19
20
21
23
24
25
26
27
28
2J
29
30
PART
NUMBER
LD3870-3.1V
LD370-3.2V
LD3870-3.3V
LD3870-3.4V
LD3870-3.5V
LD3870-3.6V
LD3870-3.8V
LD3870-4.0V
LD3870-4.5V
LD3870-4.6V
LD3870-4.7V
LD3870-4.8V
LD3870-5.0V
VOLTAGE
3.1V
3.2V
3.3V
3.4V
3.5V
3.6V
3.8V
4.0V
4.5V
4.6V
4.7V
4.8V
5.0V
VOLATGE
CODE
31
32
33
34
35
36
38
40
45
46
47
48
50
MARKING
3
2
1
MB
VOLTAGE
CODE
4
5
UTC
UNISONIC
TECHNOLOGIES
CO., LTD.
1
QW-R102-027,B