LM2991

SNVS099H – MAY 1999 – REVISED JUNE 2013

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Connection Diagrams

Front View

Top View

Figure 1. TO-220 Package, 5-Lead

Figure 2. DDPAK, TO-263 Package, 5-Lead,

Surface-Mount

See Package Number KC and NDH

See Package Number KTT

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)

Input Voltage

−26V to +0.3V

2 kV

Internally limited

Storage Temperature Range

−65°C to +150°C

Lead Temperature (Soldering, 10 sec.)

230°C

(1)

Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. Operating Ratings indicate conditions for

which the device is intended to be functional, but do not ensure specific performance limits. For ensured 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)

Human body model, 100 pF discharged through a 1.5 k

Ω resistor.

(4)

of the package (

above 125°C. Excessive power dissipation will cause the LM2991 to go into thermal shutdown (See Thermal Shutdown). For the

LM2991, the junction-to-ambient thermal resistance is 53°C/W for the TO-220, 73°C/W for the DDPAK/TO-263, and junction-to-case

thermal resistance is 3°C/W. If the DDPAK/TO-263 package is used, the thermal resistance can be reduced by increasing the PC board

copper area thermally connected to the package. Using 0.5 square inches of copper area,

area,

OPERATING RATINGS

(1)

−40°C to +125°C

ON/OFF Pin

0V to +5V

Maximum Input Voltage (Operational)

−26V

(1)

Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. Operating Ratings indicate conditions for

which the device is intended to be functional, but do not ensure specific performance limits. For ensured specifications and test

conditions, see the Electrical Characteristics.

2

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