LX8816 查看數據表（PDF） - Microsemi Corporation

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LX8816

Dual Channel 1A Low Dropout Regulator

Microsemi Corporation 

LX8816

TM

®

Dual Channel 1A Low Dropout Regulator

PRODUCTION DATA SHEET

RECOMMENDED OPERATING CONDITIONS

Parameter

Symbol

LX8816-04

Min

Typ

Max

Units

Input Voltage

Output Voltage (adjustable)

Load Current each output (with adequate heat sinking)

Input Capacitor (VIN to GND)

Output Capacitor (VOUT to GND)

VIN

4.5

10

V

VOUT

5.5

V

0

1000

mA

2.2

20

µF

1.0

10*

µF

* Size your output capacitor to meet the transient loading requirement. If you have a very dynamic load, a lower ESR and larger value capacitor will

improve the response to these load steps.

ELECTRICAL CHARACTERISTICS

Unless otherwise specified, the following specifications apply over the operating ambient temperature 0°C ≤ TA ≤ 125°C except where

otherwise noted and the following test conditions: VIN = 5V, IOUT = 10mA, C1= 10µF (Tantalum), C2= C3= 4.7µF (Tant.), & TJ = TA using

low duty cycling methods.

Parameter

` Adjustable Output (Output 1)

Symbol

Test Conditions

LX8816-04

Units

Min Typ Max

Reference Voltage

Line Regulation

Line Regulation

Load Regulation

Dropout Voltage

Current Limit

Minimum Load Current

Adjust Pin Bias Current

` Fixed Output (Output 2)

VREF

5mA < I1 < 1A, 4.75V < VIN < 10V

1.225 1.25 1.273 V

∆V1(VIN) 4.75V < VIN < 5.5V, IOUT = 5mA

1.5

2.5

mV

∆V1(VIN) 4.50V < VIN < 10V, IOUT = 5mA

0.17 0.22 %V

∆VREF(I1) 5mA < I1 < 1A, VIN = 4.75V

0.04 0.15 %V

∆V

ILOAD = 1A, ∆V1 = -2%

1.2

1.3

V

IOUT (MAX)

1.0

1.4

A

IL

Note 1, The external resistor divider current can be

included in this requirement.

2

3

mA

IADJ

Bias current flows into part.

0.12

1

µA

Output Voltage

Line Regulation

Line Regulation

Load Regulation

Dropout Voltage

Current Limit

Minimum Load Current

` Entire Regulator

V2

∆V2(VIN)

∆V2(VIN)

∆V2(I2)

∆V

IOUT (MAX)

IL

5mA < I2 < 1A, 4.75V < VIN < 10V

4.75V < VIN < 5.5V, IOUT = 5mA

4.50V < VIN < 10V, IOUT = 5mA

5mA < I2 < 1A, VIN = 4.75V

ILOAD = 1A, ∆V2 = -2%

Note 1

3.234 3.30 3.3825 V

6

8

mV

0.17 0.22 %V

2.6

6

mV

1.2

1.3

V

1.0

1.4

A

0

mA

Quiescent Current

Quiescent Current

Ripple Rejection

RMS Output Noise (% of VOUT)

Thermal Shutdown

IQ

IQ

PSRR

VOUT (RMS)

TJSD

VIN < 10V, I1 = 5mA, I2 = 5mA

VIN < 10V, I1 = 1A, I2 = 1A

f=120Hz, VIN = 5V

10Hz < f < 10kHz

2.6

3.8

mA

3.5

6

mA

60

75

dB

0.003

%V

135 140

°C

Note 1: Minimum load current is defined as the amount of output current required to maintain regulation.

Copyright © 2000

Rev. 1.2c, 2005-05-18

Microsemi

Integrated Products

11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570

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