LM3445M datasheet(3/39 Pages) TI

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LM3445

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SNVS570L – JANUARY 2009 – REVISED MAY 2013

These devices have limited built-in ESD protection. The leads should be shorted together or the device placed in conductive foam

during storage or handling to prevent electrostatic damage to the MOS gates.

ABSOLUTE MAXIMUM RATINGS

(1) (2)

BLDR to GND

-0.3V to +17V

VCC, GATE, FLTR1 to GND

-0.3V to +14V

ISNS to GND

-0.3V to +2.5V

ASNS, DIM, FLTR2, COFF to GND

-0.3V to +7.0V

COFF Input Current

100mA

Continuous Power Dissipation(3)

Internally Limited

ESD Susceptibility, HBM (4)

2 kV

Junction Temperature (TJ-MAX)

150°C

Storage Temperature Range

-65°C to +150°C

Maximum Lead Temperature Range (Soldering)

260°C

(1)

Absolute maximum ratings are limits beyond which damage to the device may occur. Operating Ratings are conditions for which the

device is intended to be functional, but device parameter specifications may not be guaranteed. For ensured specifications and test

conditions, see the Electrical Characteristics. All voltages are with respect to the potential at the GND pin, unless otherwise specified.

(2)

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

specifications.

(3)

Internal thermal shutdown circuitry protects the device from permanent damage. Thermal shutdown engages at TJ = 165°C (typ.) and

disengages at TJ = 145°C (typ).

(4)

Human Body Model, applicable std. JESD22-A114-C.

OPERATING CONDITIONS

VCC

8.0V to 12V

Junction Temperature

−40°C to +125°C

ELECTRICAL CHARACTERISTICS

Limits in standard type face are for TJ = 25°C and those with boldface type apply over the full Operating Temperature

Range ( TJ = −40°C to +125°C). Minimum and Maximum limits are specified through test, design, or statistical correlation.

Typical values represent the most likely parametric norm at TJ = +25ºC, and are provided for reference purposes only.

Symbol

Parameter

Conditions

Min

Typ

Max

Units

BLEEDER

RBLDR

Bleeder resistance to GND

IBLDR = 10mA

230

325

Ω

VCC SUPPLY

IVCC

Operating supply current

2.00

2.85

VCC-UVLO

Rising threshold

7.4

7.7

Falling threshold

6.0

6.4

Hysterisis

COFF

VCOFF

Time out threshold

1.225

1.276

1.327

RCOFF

Off timer sinking impedance

Ω

tCOFF

Restart timer

180

µs

CURRENT LIMIT

VISNS

ISNS limit threshold

1.174

1.269

1.364

tISNS

Leading edge blanking time

125

Current limit reset delay

180

µs

ISNS limit to GATE delay

ISNS = 0 to 1.75V step

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