LM2674

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SNVS007F – SEPTEMBER 1998 – REVISED APRIL 2013

All Output Voltage Versions

Symbol

Parameters

Conditions

Typ

Min

Max

Units

DEVICE PARAMETERS

Quiescent Current

2.5

3.6

mA

For 3.3V, 5.0V, and ADJ Versions

2.5

mA

For 12V Versions

Standby Quiescent Current

ON/OFF Pin = 0V

50

100/150

μA

Current Limit

0.8

0.62/0.575

1.2/1.25

A

Output Leakage Current

1

25

μA

6

15

mA

Switch On-Resistance

0.25

0.40/0.60

Ω

Oscillator Frequency

Measured at Switch Pin

260

225

275

kHz

D

Maximum Duty Cycle

95

%

Minimum Duty Cycle

0

%

Feedback Bias

85

nA

Current

ADJ Version Only

ON/OFF Pin

1.4

0.8

2.0

V

Voltage Theshold

ON/OFF Pin Current

ON/OFF Pin = 0V

20

7

37

μA

Thermal Resistance

95

°C/W

105

(1)

The ON/OFF pin is internally pulled up to 7V and can be left floating for always-on operation.

(2)

Junction to ambient thermal resistance with approximately 1 square inch of printed circuit board copper surrounding the leads. Additional

copper area will lower thermal resistance further. See Application Information section in the application note accompanying this

datasheet and the thermal model in LM267X Made Simple (version 6.0) software. The value

specifically dependent on PCB trace area, trace material, and the number of layers and thermal vias. For improved thermal resistance

and power dissipation for the WSON package, refer to Application Note AN-1187.

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