LM34910C

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SNVS517B – MAY 2007 – REVISED MARCH 2013

Absolute Maximum Ratings

(1) (2)

VIN to GND

55V

BST to GND

70V

SW to GND (Steady State)

-1.5V

ESD Rating(3)

Human Body Model

2kV

BST to VCC

55V

VIN to SW

55V

BST to SW

14V

VCC to GND

14V

SGND to RTN

-0.3V to +0.3V

Current out of ISEN

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

Junction Temperature

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 specifications and test conditions, see the Electrical Characteristics.

(2)

If Military/Aerospace specified devices are required, please contact the Texas Instruments Sales Office/Distributors for availability and

specifications.

(3)

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

Ω resistor into each pin.

Operating Ratings

(1)

VIN

8.0V to 50V

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 specifications and test conditions, see the Electrical Characteristics.

Electrical Characteristics

Specifications with standard typeface are for TJ = 25°C, and those with boldface type apply over full Operating Junction

Temperature range. VIN = 24V, RON = 200k unless otherwise stated

(1).

Symbol

Parameter

Conditions

Min

Typ

Max

Units

Start-Up Regulator, VCC

VCCReg

VCC regulated output

6.6

7

7.4

V

ICC = 0 mA,

VIN-VCC dropout voltage

1.4

V

VCC = VCCReg - 100 mV

VCC output impedance

0 mA

≤ ICC ≤ 5 mA

140

Ω

VCC current limit

(2)

VCC = 0V

9

mA

UVLOVCC

VCC under-voltage lockout

VCC increasing

5.8

V

threshold

UVLOVCC hysteresis

VCC decreasing

150

mV

UVLOVCC filter delay

100 mV overdrive

3

µs

IIN operating current

Non-switching, FB = 3V

0.63

1

mA

IIN shutdown current

RON/SD = 0V

80

250

µA

Switch Characteristics

Rds(on)

Buck Switch Rds(on)

ITEST = 200 mA

0.45

0.95

Ω

UVLOGD

Gate Drive UVLO

VBST - VSW Increasing

3.0

4.3

5.5

V

UVLOGD hysteresis

440

mV

(1)

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

(2)

VCC provides self bias for the internal gate drive and control circuits. Device thermal limitations limit external loading

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