LM2641

SNVS040B – JANUARY 2000 – REVISED APRIL 2013

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Electrical Characteristics (continued)

junction temperature range for operation, 0 to +125°C. Unless otherwise specified under the Parameter or Conditions

(1)(2)(3)

Symbol

Parameter

Conditions

Typical

Limit

Units

Undervoltage Lockout Threshold

4.0

V

3.6

V(min)

4.4

V(max)

4.8

V

Threshold

Logic Inputs

Minimum High Level Input

2.4

V(min)

Voltage (SD, ON/OFF1,

ON/OFF2, and SYNC)

Minimum High Level Input

2.6

V(min)

Voltage (2NDFB/FPWM)

Maximum Low Level Input

0.8

V(max)

Voltage (SD, ON/OFF1,

ON/OFF2, SYNC, and

2NDFB/FPWM)

Maximum Input Leakage Current

Logic Input Voltage 0 or 5V

±0.1

µA

(SD, ON/OFF1, ON/OFF2, and

SYNC)

(7)

The controllers remain OFF until the voltage of the 5V, 50 mA linear regulator (output at LIN) reaches this threshold.

8

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