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

FB, SW, EN Pin:

(GND−0.2V) to

(V

Continuous Power Dissipation

(Note 3)

Internally Limited

Junction Temperature (T

+125˚C

Storage Temperature Range

−65˚C to +150˚C

Maximum Lead Temperature

(Soldering, 10 sec.)

260˚C

ESD Rating (Note 4)

Human Body Model:

V

2.0 kV

Human Body Model: EN

500V

Machine Model: All Pins

200V

Input Voltage Range

2.8V to 5.5V

Recommended Load Current

0mA to 600 mA

Junction Temperature (T

−25˚C to +125˚C

Ambient Temperature (T

−25˚C to +85˚C

Thermal Properties

Junction-to-Ambient

Thermal Resistance (

θ

(SOT23-5) (Note 6)

250˚C/W

type apply over the full operating junction temperature range (−25˚C

≤ T

J

≤ +125˚C). Unless otherwise noted, specifications

apply to the LM3671 Typical Application Circuit (Figure. 1) with V

Symbol

Parameter

Condition

Min

Typ

Max

Units

V

IN

Input Voltage Range

(Note 11)

2.8

5.5

V

V

OUT

Output Voltage

I

−2

+4

%

I

−4

+4

%

Line Regulation

2.8V

≤ V

IN

≤ 5.5V

I

0.045

%/V

Load Regulation

100 mA

≤ I

O

≤ 300 mA

V

0.0031

%/mA

V

REF

Internal Reference Voltage

(Note 7)

0.5

V

I

SHDN

Shutdown Supply Current

EN = 0V

0.01

1

µA

I

Q_PFM

DC Bias Current into V

IN

No load, device is not switching (FB

forced higher than programmed output

voltage)

16

35

µA

R

DSON (P)

Pin-Pin Resistance for PFET

V

380

500

m

Ω

R

DSON (N)

Pin-Pin Resistance for NFET

V

250

400

m

Ω

I

LIM

Switch Peak Current Limit

Open Loop (Note 8)

830

1020

1150

mA

V

IH

Logic High Input

1.0

V

V

IL

Logic Low Input

0.4

V

I

EN

Enable (EN) Input Current

0.01

1

µA

F

OSC

Internal Oscillator Frequency

PWM Mode

1.6

2

2.6

MHz

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 pin.

130˚C (typ.).

Note 4: The Human body model is a 100 pF capacitor discharged through a 1.5 k

Ω resistor into each pin. The machine model is a 200 pF capacitor discharged

directly into each pin. MIL-STD-883 3015.7

Note 5: In Applications where high power dissipation and/or poor package resistance is present, the maximum ambient temperature may have to be derated.

(

Note 6: Junction to ambient thermal resistance is highly application and board layout dependent. In applications where high power dissipation exists, special care

must be given to thermal dissipation issues in board design. Value specified here 250 ˚C/W is based on measurement results using a 2 layer, 4" x 3", 2 oz Cu board

as per JEDEC standards. The (

Note 7: For the ADJ version the resistor dividers should be selected such that at the desired output voltage,the voltage at the FB pin is 0.5V.

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