Absolute Maximum Ratings (Note 1)

If Military/Aerospace specified devices are required,

please contact the National Semiconductor Sales Office/

Distributors for availability and specifications.

V

−0.2V to 6.0V

FB1, FB2, EN1,EN2

(GND−0.2V) to

(V

(max)

Continuous Power Dissipation

(Note 3)

Internally Limited

Junction Temperature (T

+150˚C

Storage Temperature Range

−65˚C to +150˚C

Maximum Lead Temperature

(Soldering, 10 sec.)

260˚C

ESD Rating (Note 4)

Human Body Model:

2.5kV

V

Voltage),V

Voltage) (Note 7)

3V to 5.5V

Recommended Load Current

(Buck)

0mA to 600 mA

Recommended Load Current

(LDO)

0mA to 100mA with

0.47uF O/P cap

0mA to 150mA with

1.0uF O/P cap

Junction Temperature (T

Range

−40˚C to +125˚C

Ambient Temperature (T

Range (Note 5)

−40˚C to +85˚C

Thermal Properties

Junction-to-Ambient

Thermal Resistance (

θ

SDA14B package(Note 6)

Limits in standard typeface are for T

≤

T

J

≤ +125˚C). Unless otherwise noted, specifications apply to the LP3905 Typical Application Circuit (Figure. 1)

Symbol

Parameter

Condition

Min

Typ

Max

Units

Login Input Thresholds

V

IN

Input Voltage Range

3

5.5

V

I

Q

Shutdown Supply Current

All Circuits OFF except for POR and

UVLO

6.5

10.0

µA

No load Supply Current (Note 15)

LDO1 & 2 and Buck1&2on

140

250

( PWM only versions ) LDO1 & 2

and Buck1&2on

7

10.0

mA

V

IH

Logic High Input

V

1.2

V

V

IL

Logic Low Input

V

0.4

V

I

EN

Enable (EN1,2) Input Current

(Note 14)

EN1/EN2 = 5.5V and V

2.1

5

8.5

µA

EN1/EN2 = 0V and V

0.001

0.1

µA

V

UVLO-R

Battery Under Voltage Lock-Out

V

2.7

3.1

V

T

SHUTDOWN

Thermal Shutdown (Note 15)

Temperature

160

˚C

Hysteresis

20

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