LD3870-2.0V [UTC]

LINEAR INTEGRATED CIRCUIT; 线性集成电路


型号：	LD3870-2.0V
厂家：	Unisonic Technologies
描述：	LINEAR INTEGRATED CIRCUIT 线性集成电路
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.

FEATURES

* High Ripple Rejection: 56dB≤RR(DC<f<60kHz)

66dB typ. (f=100Hz)

60dB typ. (f=1kHz)

* Output Noise Voltage: Vno=30ΜV , Cp=0.01μF

* 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

PART

NUMBER

VOLATGE

CODE

MARKING

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

M B

VOLTAGE

CODE

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

Control Voltage

VCONT

+14(Note 1)

200

Power Dissipation

℃

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

Io=30mA

-2%

+2%

300

μA

Quiescent Current

At Control OFF

Output Current

Io=0mA, expect lcont

VCONT=0V

200

I^Q(OFF)

100

Vo-0.3V

150

Line Regulation

V^IN=Vo+1V ~ Vo+6V, Io=30mA

0.10

0.03

0.2

%/V

△Vo/△V^IN

Load Regulation

△Vo/△Io Io=0 ~ 100mA

%/mA

△V^I-o

Dropout Voltage

Ripple Rejection

Io=60mA

0.12

ein=200mVrms, f=1kHz, Io=10mA,

V^IN=Vo+2V,

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

f=10Hz ~ 80kHz, Io=10mA,

Vo=3V Version

μVrms

VNO

Control Voltage for ON-state

VCONT(ON)

1.6

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.

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

+2%

300

μA

Quiescent Current

Quiescent Curretn

At Control OFF

Output Curretn

Io=0mA, expect Icont

V^CONT=0V

200

IQ(OFF)

100

Vo-0.3V

150

%/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

Ta=0 ~ 85℃, Io=10mA

Average Temperature

Coefficient of Output Voltage

Output Noise Voltage

△Vo/△Ta

mV/℃

0.13

μVrms

VNO

f=10Hz ~ 80kHz, Io=10mA

Control Voltage for ON-state

Control Voltage for OFF-state

VCONT(ON)

VCONT(OFF)

1.6

0.6

TEST CIRCUIT

IIN

VIN

VOUT

VIN

IOUT

VOUT

UTC LD3870

0.1 μF

4.7 μF

(tantalum)

NOISE

BYPASS

CONTROL

ICONT

CP=0.01 μF

GND

VCONT

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

(0~300kΩ)

NOISE

BYPASS

CONTROL

GND

Cp=0.01 μF

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

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 UNISONIC TECHNOLOGIES CO., LTD.

QW-R102-027,B

UTC LD3870 LINEAR INTEGRATED CIRCUIT

TYPICAL CHARACTERISTICS

LD3870-3.0V

Output Voltage vs.Input Voltage

Output Voltage vs.Output current

3.2

3.1

3.5

@: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

2.9

2.8

2.7

1.5

Io=30mA

Io=100mA

0.5

2.7

2.8

2.9

3.1 3.2

3.3 3.4

100

150

200

250

300

Input Voltage, V^IN(V)

Output current, Io (mA)

LD3870-3.0V

Ground Pin Current vs.Output Current

Output Voltage vs.Output current

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

0.15

0.1

0.05

100

150

200

100

150

200

Output current, Io (mA)

LD3870-3.0V

Control Current vs. Control Voltage

LD3870-3.0V

Output Voltage vs.Control Voltage

@: 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

2.5

Rc=0Ω

Rc=50kΩ

1.5

Rc=100kΩ

0.5

1.5

2.5

3.5

0.5

1.5

2.5

Control Voltage, Vcont (V)

UTC UNISONIC TECHNOLOGIES CO., LTD.

QW-R102-027,B

UTC LD3870 LINEAR INTEGRATED CIRCUIT

LD3870-3.0V

Output Noise Voltage vs.Noise Bypass Capacitor

Output Noise Voltage vs.Noise Output Current

100

300

250

200

150

100

@:Ta=25℃

VIN=4V

Cp=0.01 μF

@:Ta=25℃

VIN=4V

Io=10mA

CL=1μF(Ceramic)

CL=4.7μF(Ceramic)

CL=2.2μF(Ceramic)

10p

100p

0.01u

0.001

0.01

0.1

100

1000p

0.1u

Output Current, Io (mA)

Noise Bypass Capacitor, Cp (F)

LD3870-3.0V

Ripple Rejection vs.Output Current

Ripple Rejection vs.Frequency

Io=10mA

Io=0mA

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

100

10K

100K

0.01

0.1

100

0.001

Frequency, f (Hz)

Output Current, Io (mA)

LD3870-3.0V

Equivalent Serise Resistance vs.Output Current

100

@:Ta=25℃

VIN=4V

CL=1μ F(Ceramic)

Cp=0.01μF

Oscillation Free

0.1

0.02

Output Current, Io (mA)

10m

100m

10µ

100µ

UTC UNISONIC TECHNOLOGIES CO., LTD.

QW-R102-027,B

UTC LD3870 LINEAR INTEGRATED CIRCUIT

LD3870-3.0V

Dropout Voltage vs.Temperature

Control Voltage vs.Temperature

0.3

@:VIN=4V

Output is open

CL=4.7 μF(tantalum)

Cp=0.01 μF

0.25

0.2

1.5

0.15

0.1

0.5

@:VIN=4V

Output is open

CL=4.7 μF(tantalum)

Cp=0.01 μF

0.05

-50

100

150

-50

100

150

Temperature, Ta ( ℃)

LD3870-3.0V

Quiescent Current vs.Temperature

LD3870-3.0V

Output Voltage vs.Output current

300

250

3.5

@: VIN=4V

Io=30mA

C J=4.7μF(tantalum)

Cp=0.01 μF

200

150

100

2.5

1.5

@:VIN=4V

0.5

Output is open

C J=4.7μF(tantalum)

Cp=0.01 μF

including lcont

-50

100

150

200

-50

100

150

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.

UTC UNISONIC TECHNOLOGIES CO., LTD.

QW-R102-027,B

LD3870-2.0V [UTC]

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