LX8585A-15CDD datasheet(3/8 Pages) MICROSEMI

Part #	LX8585A-15CDD

Description	4.6A LOW DROPOUT POSITIVE REGULATORS

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Manufacturer	MICROSEMI [Microsemi Corporation]

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4.6A L OW D ROPOUT P OSITIVE R EGULA TORS

LX8585-xx/8585A-xx

PRODUCT DA T ABOOK 1996/1997

3

Rev. 2.2

12/97

P RODUCTION D AT A S HEET

Reference Voltage

LX8585/85A

V

REF

I

OUT = 10mA,

T

A = 25°C

10mA

≤ I

OUT ≤ 4.6A, 1.5V ≤ (VIN - VOUT), VIN ≤ 7V, P ≤ PMAX

Line Regulation (Note 2)

∆V

REF (V IN)

I

OUT = 10mA, 1.5V ≤ (VIN - VOUT ), VIN ≤ 7V

Load Regulation (Note 2)

∆V

REF (IOUT)

V

IN - V OUT = 3V, 10mA ≤ IOUT ≤ 4.6A

Thermal Regulation

∆V

OUT(Pwr)

T

A = 25°C, 20ms pulse

Ripple Rejection (Note 3)

V

OUT =

3.3V, f =120Hz, C

OUT = 100µf

Tantalum, V

IN = 5V

C

ADJ = 10µF, TA = 25°C, IOUT = 4.6A

Adjust Pin Current

I

ADJ

Adjust Pin Current Change

∆I

ADJ

10mA

≤ I

OUT ≤ 4.6A, 1.5V ≤ (VIN - VOUT), VIN ≤ 7V

Dropout Voltage

LX8585

∆V

REF = 1%, IOUT = 4.6A

∆V

REF = 1%, IOUT = 3A

LX8585A

∆V

REF = 1%, IOUT = 4.6A

Minimum Load Current

I

OUT(MIN)

V

IN ≤ 7V

Maximum Output Current (Note 4)

I

OUT(MAX)

1.4V

≤ (V

IN - VOUT), VIN ≤ 7V

Temperature Stability (Note 3)

∆V

OUT(t)

Long Term Stability (Note 3)

∆V

OUT (t)

T

A = 125°C, 1000 hrs

RMS Output Noise (% of V

OUT) (Note 3)

V

OUT (RMS)

T

A = 125°C, 10Hz £ f £ 10kHz

ELECTRICAL CHARACTERISTICS

(Unless otherwise specified, these specifications apply over the operating ambient temperatures for the LX8585-xxC/85A-xxC with 0°C

≤ T

A ≤ 125°C;

V

IN - VOUT = 3V; IOUT = 4.6A.

Low duty cycle pulse testing techniques are used which maintains junction and case temperatures equal to the ambient temperature.)

Parameter

Symbol

Test Conditions

Units

LX8585/85A-00

Min.

Typ.

Max.

1.238

1.250

1.262

V

1.225

1.250

1.275

V

0.035

0.2

%

0.1

0.5

%

0.01

0.02

%/W

60

83

dB

55

100

µA

0.2

5

µA

1.2

1.4

V

1.1

1.3

V

1.1

1.2

V

210

mA

4.6

6

A

0.25

%

0.3

1

%

0.003

%

Note 2.

Regulation is measured at constant junction temperature, using pulse testing with a low duty cycle. Changes in output voltage due to heating

effects are covered under the specification for thermal regulation.

Note 3.

These parameters, although guaranteed, are not tested in production.

Note 4.

I

OUT (MAX) is measured under the condition that VOUT is forced below its nominal value by 100mV.

Parameter

Symbol

Test Conditions

Units

LX8585/85A-15

Min.

Typ.

Max.

Output Voltage (Note 4)

V

OUT

V

IN = 5V, IOUT = 0mA, TA = 25°C

4.75V

≤ V

IN ≤

10V, 0mA

≤ I

OUT ≤ 7A, TA = 25°C, P ≤ PMAX

Line Regulation (Note 2)

∆V

OUT

4.75V

≤ V

IN ≤ 7V

(V

IN )

4.75V

≤ V

IN ≤ 10V

Load Regulation (Note 2)

∆V

OUT (IOUT)

V

IN = 5V, 10mA ≤ IOUT ≤ IOUT (MAX)

Thermal Regulation (Note 3)

∆V

OUT(Pwr)

T

A = 25°C, 20ms pulse

Ripple Rejection (Note 3)

C

OUT = 100µF (Tantalum), IOUT = 4.6A, TA = 25°C

Quiescent Current

I

Q

0mA

≤ I

OUT ≤ IOUT (MAX) , 4.75V ≤ VIN ≤ 10V

Dropout Voltage

LX8585-15

∆V

OUT = 1%, IOUT ≤ IOUT (MAX) , V IN - VOUT ≤ 7V

∆V

OUT = 1%, IOUT ≤ 3A, VIN - VOUT ≤ 7V

LX8585A-15

∆V

OUT = 1%, IOUT ≤ IOUT (MAX) , V IN - VOUT ≤ 7V

Temperature Stability (Note 3)

∆V

OUT (T)

Long Term Stability (Note 3)

∆V

OUT (t)

T

A = 125°C, 1000 hours

RMS Output Noise (% of V

OUT) (Note 3)

V

OUT (RMS)

T

A = 25°C, 10Hz ≤ f ≤ 10kHz

1.485

1.50

1.515

V

1.470

1.50

1.530

V

13

mV

15

mV

2.5

7

mV

0.01

0.02

% / W

65

83

dB

410

mA

1.2

1.4

V

1.1

1.3

V

1.1

1.2

V

0.25

%

0.3

1

%

0.003

%

LX8585-00 / 8585A-00 (Adjustable)

LX8585-15 / 8585A-15 (1.5V Fixed)

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