LR8845L-XX-AA3-D-R [UTC]

3A LOW DROPOUT LINEAR REGULATOR; 3A低压降线性稳压器


型号：	LR8845L-XX-AA3-D-R
厂家：	Unisonic Technologies
描述：	3A LOW DROPOUT LINEAR REGULATOR 3A低压降线性稳压器稳压器
文件：	总4页 (文件大小：274K)
中文：	中文翻译
下载：	下载PDF数据表文档文件

UNISONIC TECHNOLOGIES CO., LTD

LR8845

Preliminary

CMOS IC

3A LOW DROPOUT LINEAR

REGULATOR

DESCRIPTION

The UTC LR8845 belonged to low quiescent current, low

dropout linear regulators operated from 2.5V to 6V input and are

guaranteed to deliver 3A. Wide range of preset output voltage

options are available. Built-in low on-resistance transistor provides

low dropout voltage and large output current. The UTC LR8845 is

designed and optimized for battery-powered systems to work with

low noise.

The UTC LR8845 consumes less than 2μA in shutdown mode.

Other features include ultra low dropout voltage, current limiting

protection, thermal shutdown protection and high ripple rejection

ratio.

FEATURES

* 3A Guaranteed Output Current

* low quiescent current: 300μA (typ.)

* 2μA Shutdown Current

* Short Circuit Current Fold-back

* Low Temperature Coefficient

* Current Limiting Protection

* Thermal Shutdown Protection

* Excellent Line/Load Transient

* SENSE Option Improves Load Regulation

ORDERING INFORMATION

Ordering Number

Pin Assignment

Package

Packing

Lead Free

Halogen Free

LR8845L-xx-AA3-D-R

LR8845L-xx-TN3-D-R

LR8845L-xx-TN3-D-T

LR8845L-xx-TQ3-D-R

LR8845L-xx-TQ3-D-T

LR8845G-xx-AA3-D-R

LR8845G-xx-TN3-D-R

LR8845G-xx-TN3-D-T

LR8845G-xx-TQ3-D-R

LR8845G-xx-TQ3-D-T

SOT-223

TO-252

TO-263

Tape Reel

Tube

Tape Reel

Tube

Note: 1. Pin assignment: I: V_INO: V_OUTG: GND

2. xx: Output Voltage, refer to Marking Information.

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QW-R502-750.a

LR8845

Preliminary

CMOS IC

MARKING INFORMATION

PACKAGE

VOLTAGE CODE

MARKING

G: Halogen Free

L: Lead Free

LR8845

Pin Code

SOT-223

Voltage Code

Date Code

25:2.5V

TO-252

TO-263

BLOCK DIAGRAM

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LR8845

Preliminary

CMOS IC

ABSOLUTE MAXIMUM RATING (T_A=25°С)

PARAMETER SYMBOL

RATINGS

UNIT

Supply Voltage

V_IN

P_D

Power Dissipation

Internally limited

+150

°С

Junction Temperature

Operation Temperature

Storage Temperature

T_J

T_OPR

T_STG

-40 ~ +85

-65 ~ +150

°С

Note: 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.

THERMAL DATA

PARAMETER

SYMBOL

RATINGS

165

UNIT

TO-223

TO-252

TO-263

Junction to Ambient

θ_JA

108

°С/W

ELECTRICAL CHARACTERISTICS

(V_IN= V_OUT+ 1V whichever is greater, C_IN=0.1µF, C_OUT=2.2µF (Ceramic), T_A= 25°C, unless otherwise specified)

PARAMETER

Input Voltage

SYMBOL

V_IN

TEST CONDITIONS

MIN

Note1

-2

TYP

MAX

UNIT

T_A＝25°С , I_OUT= 1mA ~3A

T_A＝0~85°С, I_OUT= 1mA~3A

Output Voltage Accuracy

V_OUT

-3

Maximum Output Current

Short-Circuit Current Limit

Short-Circuit Current

I_OUT

I_LIMIT

I_SC

V_OUT>1.2V

4.5

1.7

300

V_OUT<0.4V

I_OUT= 0mA

400

Ground Pin Current

I_GND

µA

I_OUT= 1mA to 3A

1.5V<=V_OUT<=1.8V

I_OUT=3A 1.8V<V_OUT<2.5V

2.5<=V_OUT

1000

700

Dropout Voltage (Note 2)

Line Regulation

V_D

300

0.1

450

ΔV

OUT

ΔV × V

IN OUT

V_IN=V_OUT+V_D~6V

0.2

%/V

Load Regulation

ΔV_OUT

e_N

V_IN=V_OUT+1V, I_OUT=10mA~3A

0.2

Output Voltage Noise

f=10Hz to100kHz, C_OUT=2.2μF

µV_RMS

SHDN

=GND

Shutdown Supply Current

I_OFF

µA

f=100Hz

f=1kHz

_OUT=100mA

_OUT=10μF

Power Supply Rejection

PSRR

V_IH

V_IL

Shutdown Threshold

0.4

Thermal Shutdown Temperature

Thermal Shutdown Hysteresis

Notes: 1. V_IN(MIN)= V_OUT+ V_DROPOUT

T_SHDN

DT_SHDN

150

°С

2. The dropout voltage is defined as V_IN-V_OUT, which is measured when V_OUTis V_OUT(NORMAL)× 98%

UNISONIC TECHNOLOGIES CO., LTD

3 of 4

QW-R502-750.a

www.unisonic.com.tw

LR8845

Preliminary

CMOS IC

TYPICAL APPLICATION CIRCUIT

UNISONIC TECHNOLOGIES CO., LTD

4 of 4

QW-R502-750.a

www.unisonic.com.tw

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