LD370-3.2V [UTC]
LINEAR INTEGRATED CIRCUIT; 线性集成电路型号: | LD370-3.2V |
厂家: | Unisonic Technologies |
描述: | LINEAR INTEGRATED CIRCUIT |
文件: | 总7页 (文件大小:73K) |
中文: | 中文翻译 | 下载: | 下载PDF数据表文档文件 |
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≤RR(DC<f<60kHz)
5
66dB typ. (f=100Hz)
60dB typ. (f=1kHz)
* Output Noise Voltage: Vno=30ΜV , Cp=0.01μF
4
* Output Current: Io(max)=150mA
* High Precision Output: Vo±2%
* Low Dropout Voltage: △Vl-o=0.12V typ.
(Io=60mA,Vo≥1.8V)
SOT-25
* 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
1:CONTROL(Active High)
2:GND
5: VIN
3:NOISE BYPASS
4:VOUT
MARKING INFORMATION
PART
NUMBER
VOLATGE
CODE
15
PART
NUMBER
VOLATGE
CODE
31
MARKING
VOLTAGE
VOLTAGE
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
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
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
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
18
32
19
33
3
2
1
20
34
35
36
21
23
M B
VOLTAGE
CODE
24
38
40
45
46
47
48
50
25
26
4
5
27
28
2J
29
30
1
UTC UNISONIC TECHNOLOGIES CO., LTD.
QW-R102-027,B
UTC LD3870 LINEAR INTEGRATED CIRCUIT
BLOCK DAGRAM
VIN
VOUT
Cont
Thermal
Protection
Noise
Bypass
+
-
Bandgap
Reference
GND
ABSOLUTE MAXIMUM RATINGS (Ta=25℃)
PARAMETER
Input Voltage
SYMBOL
VIN
RATINGS
+14
UNIT
V
Control Voltage
VCONT
PD
+14(Note 1)
200
V
Power Dissipation
mW
℃
Operating Temperature
Storage Temperature
Topr
-40 ~ +85
-40 ~ +125
℃
Tstg
Note 1: When input voltage is less than +14V,the absolute maximum control voltage is equal to the input voltage.
ELECTRICAL CHARACTERISTICS (VIN=Vo+1V, CIN=0.1μF, Co=4.7μF, Cp=0.01μF, Ta=25℃)
PARAMETER
SYMBOL
TEST CONDITONS
MIN.
TYP. MAX. UNIT
Output Voltage
Vo
IQ
Io=30mA
-2%
+2%
300
V
μA
Quiescent Current
Quiescent Current
At Control OFF
Output Current
Io=0mA, expect lcont
VCONT=0V
200
200
IQ(OFF)
100
nA
Io
Vo-0.3V
150
mA
Line Regulation
VIN=Vo+1V ~ Vo+6V, Io=30mA
0.10
0.03
0.2
%/V
△Vo/△VIN
Load Regulation
△Vo/△Io Io=0 ~ 100mA
%/mA
V
△VI-o
Dropout Voltage
Ripple Rejection
Io=60mA
0.12
60
ein=200mVrms, f=1kHz, Io=10mA,
VIN=Vo+2V,
RR
dB
Vo=3V Version
Ta=0~85℃, Io=10mA,
Vo=3V Version
Average Temperature
Coefficient of Output Voltage
Output Noise Voltage
△Vo/△Ta
mV/℃
0.2
30
f=10Hz ~ 80kHz, Io=10mA,
Vo=3V Version
μVrms
VNO
Control Voltage for ON-state
VCONT(ON)
1.6
V
V
Control Voltage for OFF-state VCONT(OFF)
0.6
Note 2: 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.
2
UTC UNISONIC TECHNOLOGIES CO., LTD.
QW-R102-027,B
UTC LD3870 LINEAR INTEGRATED CIRCUIT
ELECTRICAL CHARACTERISTICS
(Vo=1.5V Version, VIN=2.4V, CIN=0.1μF, Co=4.7μF, Cp=0.01μF, Ta=25℃)
PARAMETER
Output Voltage
SYMBOL
TEST CONDITONS
Io=30mA
MIN.
-2%
TYP. MAX. UNIT
Vo
IQ
+2%
300
V
μA
Quiescent Current
Quiescent Curretn
At Control OFF
Output Curretn
Io=0mA, expect Icont
VCONT=0V
200
200
IQ(OFF)
100
nA
Io
Vo-0.3V
150
mA
%/V
△Vo/△VIN
△Vo/△Io
Line Regulation
Load Regulation
Ripple Rejection
VIN=Vo+1V ~ Vo+6V, Io=30mA
Io=0 ~ 100mA
0.10
0.03
%/mA
ein=200mVrms, f=1kHz, Io=10mA,
VIN=Vo+2V
RR
64
dB
Ta=0 ~ 85℃, Io=10mA
Average Temperature
Coefficient of Output Voltage
Output Noise Voltage
△Vo/△Ta
mV/℃
0.13
15
μVrms
VNO
f=10Hz ~ 80kHz, Io=10mA
Control Voltage for ON-state
Control Voltage for OFF-state
VCONT(ON)
VCONT(OFF)
1.6
V
V
0.6
TEST CIRCUIT
IIN
VIN
VOUT
A
+
+
VIN
IOUT
VOUT
V
UTC LD3870
0.1 μF
4.7 μF
(tantalum)
NOISE
BYPASS
CONTROL
A
ICONT
CP=0.01 μF
GND
VCONT
V
TYPICAL APPLICATON
①
In case that 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
3
UTC UNISONIC TECHNOLOGIES CO., LTD.
QW-R102-027,B
UTC LD3870 LINEAR INTEGRATED CIRCUIT
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”.
②
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.
4
UTC UNISONIC TECHNOLOGIES CO., LTD.
QW-R102-027,B
UTC LD3870 LINEAR INTEGRATED CIRCUIT
TYPICAL CHARACTERISTICS
LD3870-3.0V
LD3870-3.0V
Output Voltage vs.Input Voltage
Output Voltage vs.Output current
3.2
3.1
3
4
3.5
3
@:Ta=25℃
VIN=4V
CL=4.7 μF(tantalum)
Cp=0.01 μF
@:Ta=25℃
Co=4.7 μF(tantalum)
Cp=0.01 μF
Io=0A
2.5
2
2.9
2.8
2.7
1.5
1
Io=30mA
Io=100mA
0.5
0
2.7
2.8
2.9
3
3.1 3.2
3.3 3.4
0
50
100
150
200
250
300
Input Voltage, VIN (V)
Output current, Io (mA)
LD3870-3.0V
LD3870-3.0V
Ground Pin Current vs.Output Current
Output Voltage vs.Output current
20
0.3
@:Ta=25℃
CL=4.7 μF(tantalum)
Cp=0.01 μF
@:Ta=25℃
VIN=4V
CL=4.7 μF(tantalum)
Cp=0.01 μF
0.25
0.2
15
10
5
0.15
0.1
0.05
0
0
0
50
100
150
200
0
50
100
150
200
Output current, Io (mA)
Output current, Io (mA)
LD3870-3.0V
Control Current vs. Control Voltage
LD3870-3.0V
Output Voltage vs.Control Voltage
60
4
@: VIN=4V
Ta=25 ℃
CL=4.7 μF
Cp=0.01 μF
Io=30mA
@:Ta=25℃
VIN=4V
CL=4.7 μF(tantalum)
Cp=0.01 μF
Io=30mA
3.5
50
40
30
20
3
2.5
2
Rc=0Ω
Rc=0Ω
Rc=50kΩ
Rc=50kΩ
1.5
1
Rc=100kΩ
10
0
Rc=100kΩ
0.5
0
0
0.5
1
1.5
2
2.5
3
3.5
4
0
0.5
1
1.5
2
2.5
3
Control Voltage, Vcont (V)
Control Voltage, Vcont (V)
5
UTC UNISONIC TECHNOLOGIES CO., LTD.
QW-R102-027,B
UTC LD3870 LINEAR INTEGRATED CIRCUIT
LD3870-3.0V
LD3870-3.0V
Output Noise Voltage vs.Noise Bypass Capacitor
Output Noise Voltage vs.Noise Output Current
100
80
60
40
20
0
300
250
200
150
100
50
@:Ta=25℃
VIN=4V
Cp=0.01 μF
@:Ta=25℃
VIN=4V
Io=10mA
CL=1μF(Ceramic)
CL=1μF(Ceramic)
CL=4.7μF(Ceramic)
CL=2.2μF(Ceramic)
0
1p
10p
100p
0.01u
0.001
0.01
0.1
1
10
100
1000p
0.1u
Output Current, Io (mA)
Noise Bypass Capacitor, Cp (F)
LD3870-3.0V
LD3870-3.0V
Ripple Rejection vs.Output Current
Ripple Rejection vs.Frequency
80
80
70
60
50
40
30
Io=10mA
Io=0mA
70
60
50
40
30
f=1KHz
Io=30mA
f=10KHz
@:Ta=25℃
VIN=4V
@:Ta=25℃
VIN=5V
ein=200mVrms
CL=1 μF
ein=200mVrms
CL=1 μF
Cp=0.01μF
Cp=0.01μF
10
100
1K
10K
100K
0.01
0.1
1
10
100
0.001
Frequency, f (Hz)
Output Current, Io (mA)
LD3870-3.0V
Equivalent Serise Resistance vs.Output Current
100
10
@:Ta=25℃
VIN=4V
CL=1μ F(Ceramic)
Cp=0.01μF
Oscillation Free
1
0.1
0.02
1m
Output Current, Io (mA)
10
10m
100m
10µ
100µ
6
UTC UNISONIC TECHNOLOGIES CO., LTD.
QW-R102-027,B
UTC LD3870 LINEAR INTEGRATED CIRCUIT
LD3870-3.0V
LD3870-3.0V
Dropout Voltage vs.Temperature
Control Voltage vs.Temperature
2
0.3
@:VIN=4V
Output is open
CL=4.7 μF(tantalum)
Cp=0.01 μF
0.25
0.2
1.5
1
0.15
0.1
0.5
0
@:VIN=4V
Output is open
CL=4.7 μF(tantalum)
Cp=0.01 μF
0.05
0
-50
0
50
100
150
-50
0
50
100
150
Temperature, Ta ( ℃)
Temperature, Ta ( ℃)
LD3870-3.0V
Quiescent Current vs.Temperature
LD3870-3.0V
Output Voltage vs.Output current
300
250
4
3.5
3
@: VIN=4V
Io=30mA
C J=4.7μF(tantalum)
Cp=0.01 μF
200
150
100
50
2.5
2
1.5
@:VIN=4V
1
0.5
0
Output is open
C J=4.7μF(tantalum)
Cp=0.01 μF
including lcont
0
-50
0
50
100
150
200
-50
0
50
100
150
Temperature, Ta ( ℃)
Temperature, Ta ( ℃)
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.
7
UTC UNISONIC TECHNOLOGIES CO., LTD.
QW-R102-027,B
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