LP3985IBP-2.7 datasheet(5/17 Pages) NSC

Part #	LP3985IBP-2.7

Description	Micropower, 150mA Low-Noise Ultra Low-Dropout CMOS Voltage Regulator

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Manufacturer	NSC [National Semiconductor (TI)]

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Absolute Maximum Ratings (Notes 1,

2)

If Military/Aerospace specified devices are required,

please contact the National Semiconductor Sales Office/

Distributors for availability and specifications.

V

IN,VEN

−0.3 to 6.5V

V

OUT

-0.3 to (V

IN+0.3)

≤ 6.5V

Junction Temperature

150˚C

Storage Temperature

−65˚C to +150˚C

Lead Temp.

235˚C

Pad Temp. (Note 3)

235˚C

Maximum Power Dissipation

SOT23-5 (Note 4)

micro SMD (Note 4)

364mW

355mW

ESD Rating(Note 5)

Human Body Model

Machine Model

2kV

150V

Operating Ratings (Notes 1, 2)

V

IN

2.5 to 6V

V

EN

0to(V

IN+0.3)

≤ 6V

Junction Temperature

−40˚C to +125˚C

Thermal Resistance

θ

JA (SOT23-5)

θ

JA (micro SMD)

220˚C/W

255˚C/W

Maximum Power Dissipation

SOT23-5 (Note 6)

micro SMD (Note 6)

250mW

244mW

Electrical Characteristics

Unless otherwise specified: V

IN =VOUT(nom) + 0.5V, CIN = 1 µF, IOUT = 1mA, COUT = 1 µF, CBYPASS = 0.01µF. Typical values

and limits appearing in standard typeface are for T

J = 25˚C. Limits appearing in boldface type apply over the entire junction

temperature range for operation, −40˚C to +125˚C. (Note 7) (Note 8)

Symbol

Parameter

Conditions

Typ

Limit

Units

Min

Max

∆V

OUT

Output Voltage

Tolerance

I

OUT = 1mA

−2

−3

2

3

%of

V

OUT(nom)

Line Regulation Error

V

IN =(VOUT(nom) + 0.5V) to 6.0V,

For 4.7 to 5.0 options

For all other options

−0.19

−0.1

0.19

0.1

%/V

Load Regulation Error

(Note 9)

I

OUT = 1 mA to 150 mA

LP3985IM5 (SOT23-5)

0.0025

0.005

%/mA

LP3985 (micro SMD)

0.0004

0.002

Output AC Line Regulation

V

IN =VOUT(nom) + 1V,

I

OUT = 150 mA (Figure 1)

1.5

mV

P-P

PSRR

Power Supply Rejection Ratio

V

IN =VOUT(nom) + 0.2V,

f = 1 kHz,

I

OUT = 50mA(Figure 2)

50

dB

V

IN =VOUT(nom) + 0.2V,

f = 10 kHz,

I

OUT = 50mA(Figure 2)

40

I

Q

Quiescent Current

V

EN = 1.4V, IOUT =0 mA

For 4.7 to 5.0 options

For all other options

100

85

165

150

µA

V

EN = 1.4V, IOUT = 0 to 150 mA

For 4.7 to 5.0 options

For all other options

155

140

250

200

V

EN = 0.4V

0.003

1.5

Dropout Voltage (Note 10)

I

OUT =1mA

0.4

2

mV

I

OUT =50mA

20

35

I

OUT = 100 mA

45

70

I

OUT = 150 mA

60

100

I

SC

Short Circuit Current Limit

Output Grounded

(Steady State)

600

mA

I

OUT(PK)

Peak Output Current

V

OUT

≥ V

OUT(nom) - 5%

550

300

mA

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