LM34910

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SNVS297B – OCTOBER 2004 – REVISED MARCH 2013

Absolute Maximum Ratings

(1) (2)

40V

BST to GND

50V

SW to GND (Steady State)

-1.5V

Human Body Model

2kV

40V

40V

BST to SW

14V

14V

-0.3V to +0.3V

See Text

SS to RTN

-0.3V to 4V

All Other Inputs to GND

-0.3 to 7V

Storage Temperature Range

-55°C to +150°C

JunctionTemperature

150°C

(1)

Absolute Maximum Ratings are limits beyond which damage to the device may occur. Operating Ratings are conditions under which

operation of the device is intended to be functional. For guaranteed specifications and test conditions, see the Electrical Characteristics.

(2)

For detailed information on soldering plastic WSON packages, refer to the Packaging Data Book available from National Semiconductor

Corporation.

(3)

The human body model is a 100pF capacitor discharged through a 1.5k

Ω resistor into each pin.

Operating Ratings

(1)

8.0V to 36V

Junction Temperature

−40°C to + 125°C

(1)

Absolute Maximum Ratings are limits beyond which damage to the device may occur. Operating Ratings are conditions under which

operation of the device is intended to be functional. For guaranteed specifications and test conditions, see the Electrical Characteristics.

Electrical Characteristics

Symbol

Parameter

Conditions

Min

Typ

Max

Units

6.6

7

7.4

V

1.4

V

0 mA

140

Ω

(2)

9

mA

5.8

V

threshold

150

mV

100 mV overdrive

3

µs

Non-switching, FB = 3V

0.63

1

mA

80

250

µA

Switch Characteristics

Rds(on)

Buck Switch Rds(on)

0.45

0.95

Ω

Gate Drive UVLO

3.0

4.3

5.5

V

440

mV

Softstart Pin

Pull-up voltage

2.5

V

Internal current source

11.5

µA

(1)

Typical specifications represent the most likely parametric norm at 25°C operation.

(2)

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