LD3870G-25-AF5-R [UTC]
Fixed Positive LDO Regulator;
| 型号： | LD3870G-25-AF5-R |
| 厂家： | 
Unisonic Technologies |
| 描述： | Fixed Positive LDO Regulator 输出元件 调节器 |
| 文件： | 总5页 (文件大小：205K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
UNISONIC TECHNOLOGIES CO., LTD
LD3870
LINEAR INTEGRATED CIRCUIT
LOW DROPOUT VOLTAGE
REGULATOR
DESCRIPTION
The UTC LD3870 is low dropout voltage regulator designed
for cellular phone application.
FEATURES
* High Ripple Rejection: 56dB≤RR(DC<f<60kHz)
66dB typ. (f=100Hz)
60dB typ. (f=1kHz)
* Output Noise Voltage: eN=30ΜV , Cp=0.01μF
* Output Current: IO(MAX)=150mA
* High Precision Output: VO±2%
* Low Dropout Voltage: VD=0.12V typ.
(IO=60mA,Vo≥1.8V)
* 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
ORDERING INFORMATION
Ordering Number
Package
SOT-25
Packing
Lead Free
Halogen Free
LD3870G-xx-AF5-R
LD3870L-xx-AF5-R
Tape Reel
www.unisonic.com.tw
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Copyright © 2013 Unisonic Technologies Co., LTD
QW-R105-028,E
LD3870
LINEAR INTEGRATED CIRCUIT
MARKING INFORMATION
PACKAGE
VOLTAGE CODE
MARKING
15:1.5V
18:1.8V
25:2.5V
27:2.7V
30:3.0V
33:3.3V
50:5.0V
4
5
1
L: Lead Free
G: Halogen Free
MXX□
SOT-25
Voltage Code
3
2
PIN CONFIGURATION
VIN
5
VOUT
4
1
3
2
NOISE
BYPASS
CONT GND
BLOCK DAGRAM
UNISONIC TECHNOLOGIES CO., LTD
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LD3870
LINEAR INTEGRATED CIRCUIT
ABSOLUTE MAXIMUM RATINGS (TA=25°C, unless otherwise specified)
PARAMETER
SYMBOL
VIN
RATINGS
+14
UNIT
V
Input Voltage
Control Voltage
VCONT
PD
+14(Note 2)
200
V
Power Dissipation
mW
°C
Operating Temperature
Storage Temperature
TOPR
TSTG
-40 ~ +85
-40 ~ +125
°C
Note 1: Absolute maximum ratings are those values beyond which the device could be permanently damaged.
Absolute maximum ratings are stress ratings only and functional device operation is not implied.
2. When input voltage is less than +14V, the absolute maximum control voltage is equal to the input voltage.
ELECTRICAL CHARACTERISTICS
(VIN=VOUT+1V, CIN=0.1μF, COUT=4.7μF, Cp=0.01μF, TA=25°C)
PARAMETER
Output Voltage
SYMBOL
VOUT
TEST CONDITONS
IOUT=30mA
MIN
-2%
TYP
200
MAX
+2%
300
UNIT
V
Quiescent Current
Quiescent Current
At Control OFF
Output Current
IQ
IOUT=0mA, expect lCONT
μA
IQ(OFF)
VCONT=0V
100
nA
IOUT
VOUT-0.3V
150
200
mA
Line Regulation
Load Regulation
Dropout Voltage
△VOUT/△VIN VIN=VOUT+1V ~ VOUT+6V, IOUT=30mA
△VOUT/△IOUT IOUT=0 ~ 100mA
0.10
%/V
0.03 %/mA
VD
IOUT=60mA
0.12
60
0.2
V
eIN=200mVrms, f=1kHz, IOUT=10mA,
VIN=VOUT+2V, VOUT=3V Version
TA=0~85℃, IOUT=10mA,
Ripple Rejection
RR
dB
Average Temperature
Coefficient of Output Voltage
△VOUT/△TA
0.2
30
mV/°C
V
OUT=3V Version
f=10Hz ~ 80kHz, IOUT=10mA,
OUT=3V Version
Output Noise Voltage
μVrms
eN
V
ON
Control Voltage
OFF
VCONT(ON)
VCONT(OFF)
1.6
V
V
0.6
Note: The above specification is a common specification for all output voltages. Therefore, it may be different from
the individual specification for a specific output voltage.
UNISONIC TECHNOLOGIES CO., LTD
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QW-R105-028,E
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LD3870
LINEAR INTEGRATED CIRCUIT
TEST CIRCUIT
UNISONIC TECHNOLOGIES CO., LTD
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QW-R105-028,E
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LD3870
LINEAR INTEGRATED CIRCUIT
TYPICAL APPLICATON
For ON/OFF Control is not required:
VOUT
VIN
VOUT
0.1 μF
4.7 μF
(ceramic or tantalum)
UTC LD3870
R
(0~300kΩ)
NOISE
BYPASS
CONTROL
GND
Cp=0.01 μF
Connect control terminal to VIN terminal
The quiescent current can be reduced by using a resistance “R”. Instead, it increases the minimum operating
voltage. For further information, please refer to Figure ”Output Voltage vs. Control Voltage”.
For In use of ON/OFF CONTROL:
VIN
VOUT
VIN
VOUT
0.1 μF
4.7 μF
(ceramic or tantalum)
UTC LD3870
R
NOISE
BYPASS
CONTROL
GND
Cp=0.01 μF
State of control terminal:
* ”H” Æ Output is enables.
* ”L”or “open” Æ Output is disabled.
* Noise bypass Capacitance Cp
- Noise bypass capacitance Cp reduces noise generated by hand-gap reference circuit.
- Noise level and ripple rejection will be improved when larger Cp is used.
- Use of smaller Cp value may cause oscillation.
- Use the Cp value of 0.01uF greater to avoid the problem.
UTC assumes no responsibility for equipment failures that result from using products at values that
exceed, even momentarily, rated values (such as maximum ratings, operating condition ranges, or
other parameters) listed in products specifications of any and all UTC products described or contained
herein. UTC products are not designed for use in life support appliances, devices or systems where
malfunction of these products can be reasonably expected to result in personal injury. Reproduction in
whole or in part is prohibited without the prior written consent of the copyright owner. The information
presented in this document does not form part of any quotation or contract, is believed to be accurate
and reliable and may be changed without notice.
UNISONIC TECHNOLOGIES CO., LTD
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