LX8940IP datasheet(3/6 Pages) MICROSEMI

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LX8940

PRODUCTION DATA SHEET

Microsemi

Integrated Products Division

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

Page 3

Rev. 1.3a, 2005-11-18

5V Low Dropout Regulator

ELECTRICAL CHA RACTERISTICS

Unless otherwise specified, the following specifications apply over the operating ambient temperature -40

°C to +125°C for the LX8940IP

and 0°C to +125°C for LX8940CP; VIN = 10V, IO = 1A, COUT = 22µF, and for DC characteristics only. Low duty cycle pulse testing

techniques are used which maintains junction and case temperatures equal to the ambient temperature.)

LX8940

Parameter

Symbol

Test Conditions

Min

Typ

Max

Units

SECTION HEADER

Output Voltage

IO = 0A, TA = 25°C

4.85

5.15

Line Regulation

∆VOI

7V < VIN < 26, IO =5mA

Load Regulation

∆VOL

50mA < IO < 1A

Output Impedance (Note 3)

100mADC and 20mARMS, fO = 120Hz

200

mΩ

IO < 5mA, 7 < VIN < 26V

IO = 500mA

Quiescent Current

IO = 1000mA

115

180

Output Noise Voltage (Note 3)

VORMS

10Hz – 100kHz, IO = 5mA

150

µVRMS

Long Term Stability (Note 3)

mV /

1000hr

Ripple Rejection (Note 3)

fO = 120Hz, 1VRMS, IO = 100mA

IO = 100mA

150

300

IO = 500mA

275

500

Dropout Voltage

∆V

IO = 1A

400

800

Current Limit

ICL

VIN = 26V

1.2

Maximum Operational Input

Voltage

VIN(MAX)

Maximum Line Transient

VIN(TR)

RO = 100Ω, T < 100mS

Note 3: These parameters, although guaranteed, are not tested in production.

SIMPLIFIED BLOCK DIAGRAM

Overvoltage

Thermal

Shutdown

Regulator

Bias

1.23V

Reference

Input

Voltage

0.1µF

10µF

Output

Voltage

LX8940

Input

Output

GND

* Required if regulator is located far from power supply filter

Figure 1 –

Simplified Block Diagram

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