If Military/Aerospace specified devices are required,

please contact the National Semiconductor Sales Office/

Distributors for availability and specifications.

V

-0.3V to 6.0V

EN Pin Voltage

-0.3V to (V

w/ 6.0V max

Continuous Power Dissipation

(Note 3)

Internally Limited

Junction Temperature (T

Storage Temperature Range

Maximum Lead Temperature

(Note 4)

ESD Rating (Note 5)

Human Body Model:

Machine Model

2.0kV

200V

Input Voltage Range

2.7V to 5.5V

Recommended Load Current Range

0mA to 250mA

Junction Temperature (T

-30˚C to +110˚C

Ambient Temperature (T

(Note 6)

-30˚C to +85˚C

Thermal Properties

Junction-to-Ambient Thermal

Resistance (

θ

(Note 7)

55˚C/W

Limits in standard typeface are for T

(-30˚C

≤ T

J

≤ +110˚C) . Unless otherwise noted, specifications apply to the LM2771 Typical Application Circuit (pg. 1) with: V

IN

= 3.6V; V(EN) = 1.8V, C

Symbol

Parameter

Condition

Min

Typ

Max

Units

V

OUT

1.5V Output Voltage Regulation

3.0V

≤ V

IN

≤ 5.5V

0mA

≤ I

OUT

≤ 200mA

1.455

(−3%)

1.5

1.545

(+3%)

V

3.0V

≤ V

IN

≤ 5.5V

I

1.475

(−1.7%)

1.5

1.525

(+1.7%)

IN

≤ 5.5V,

0mA

≤ I

OUT

≤ 250mA

1.445

(−3.7%)

1.5

1.545

(+3%)

V

Output Load Regulation

V

0mA

≤ I

OUT

≤ 250mA

0.17

mV/mA

V

Output Line Regulation

0.1

%/V

E

Power Efficiency

I

81

%

I

Q

Quiescent Supply Current

I

(Note 10)

45

50

µA

V

R

Fixed Frequency Output Ripple

40mA

≤ I

OUT

≤ 250mA

8

mV

V

R–PFM

PFM–Mode Output Ripple

I

12

mV

I

SD

Shutdown Current

V(EN) = 0V

0.1

0.5

µA

F

SW

Switching Frequency

3.2V

≤ V

IN

≤ 5.5V

0.80

1.1

1.40

MHz

R

OL

Open–Loop Output Resistance

I

(Note 11)

1.0

Ω

I

CL

Output Current Limit

V

0V

≤ V

OUT

≤ 0.2V

(Note 12)

500

mA

t

ON

Turn-on Time

150

µs

V

IL

Logic-low Input Voltage

3.0V

≤ V

IN

≤ 5.5V

0

0.5

V

V

IH

Logic-high Input Voltage

3.0V

≤ V

IN

≤ 5.5V

0.95

V

IN

V

I

IH

Logic-high Input Current

V(EN) = 1.8V

(Note 13)

5µA

I

IL

Logic-low Input Current

Logic Input = 0V

0.1

µA

Note 1: Absolute Maximum Ratings indicate limits beyond which damage to the component may occur. Operating Ratings are conditions under which operation of

the device is guaranteed. Operating Ratings do not imply guaranteed performance limits. For guaranteed performance limits and associated test conditions, see the

Electrical Characteristics tables.

Note 2: All voltages are with respect to the potential at the GND pins.

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