LM3550 datasheet(3/37 Pages) TI1

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LM3550

www.ti.com

SNVS569B – MAY 2009 – REVISED MAY 2013

Absolute Maximum Ratings

(1) (2) (3)

VIN to GND

−0.3V to 6V

VOUT, LED−, FB to GND

−0.3V to 6V

SDA, SCL, STROBE, FET_CON, EOC, ALD/TEMP,

IND to GND

−0.3V to 6V

Continuous Power Dissipation(4)

Internally Limited

Junction Temperature (TJ-MAX )

150°C

Storage Temperature Range

−65°C to +150

Maximum Lead Temperature (Soldering, 10s)

See(5)

ESD Rating(6)

Human Body Model

2 kV

Machine Model(7)

200V

(1)

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

which operation of the device is ensured. Operating Ratings do not imply ensured performance limits. For ensured performance limits

and associated test conditions, see the Electrical Characteristics tables.

(2)

All voltages are with respect to the potential at the GND pin.

(3)

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

specifications.

(4)

Internal thermal shutdown circuitry protects the device from permanent damage. Thermal shutdown engages at TJ = 145ºC (typ.) and

disengages at TJ = 125ºC (typ.). The thermal shutdown is specified by design.

(5)

For detailed soldering specifications and information, please refer to Texas Instruments Application Note: AN-1187 (SNOA401) for

Recommended Soldering Profiles.

(6)

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

Ω resistor into each pin. The machine model is a 200 pF

capacitor discharged through a 0

Ω (nominal) resistor into each pin.(MIL-STD-883 3015.7). Texas Instruments recommends that all

integrated circuits be handled with appropriate ESD precautions. Failure to observe proper ESD handling techniques can result in

damage to the device.

(7)

The LED

− pin has a machine model ESD rating of 150V.

Operating Ratings

(1) (2)

Input Voltage Range

2.7V to 5.5V

Junction Temperature Range

−30°C to 125°C

(TJ)

(3)

Ambient Temperature Range

−30°C to +85°C

(TA)

(4)

(1)

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

which operation of the device is ensured. Operating Ratings do not imply ensured performance limits. For ensured performance limits

and associated test conditions, see the Electrical Characteristics tables.

(2)

All voltages are with respect to the potential at the GND pin.

(3)

For detailed soldering specifications and information, please refer to Texas Instruments Application Note: AN-1187 (SNOA401) for

Recommended Soldering Profiles.

(4)

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

Ω resistor into each pin. The machine model is a 200 pF

capacitor discharged through a 0

Ω (nominal) resistor into each pin.(MIL-STD-883 3015.7). Texas Instruments recommends that all

integrated circuits be handled with appropriate ESD precautions. Failure to observe proper ESD handling techniques can result in

damage to the device.

Thermal Properties

Junction-to-Ambient Thermal Resistance (

θJA)

(1)

57°C/W

(1)

In applications where high power dissipation and/or poor package thermal resistance is present, the maximum ambient temperature may

have to be derated. Maximum ambient temperature (TA-MAX) is dependent on the maximum operating junction temperature (TJ-MAX-OP =

125ºC), the maximum power dissipation of the device in the application (PD-MAX), and the junction-to-ambient thermal resistance of the

part/package in the application (

θJA), as given by the following equation: TA-MAX = TJ-MAX-OP – (θJA × PD-MAX).

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