Specifications with standard typeface are for T

Temperature range. VIN = 48V, VCC = 10V externally applied, R

Ω, UVLO = 1.5V, unless otherwise

stated (Note 3) and (Note 4).

Symbol

Parameter

Conditions

Min

Typ

Max

Units

Thermal Shutdown

T

SD

Shutdown temperature

165

˚C

Hysteresis

20

˚C

Thermal Resistance

θ

JA

Junction to ambient, 0 LFPM

Air Flow

TSSOP-16 package

125

˚C/W

Note 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.

Note 2: For detailed information on soldering plastic TSSOP packages, refer to the Packaging Data Book available from National Semiconductor Corporation.

guaranteed by correlating the electrical characteristics to process and temperature variations and applying statistical process control.

Note 4: Typical specifications represent the most likely parametric norm at 25˚C operation

Note 5: The human body model is a 100 pF capacitor discharged through a 1.5 k

Ω resistor into each pin.

Timing Diagram

20135005

FIGURE 2. Startup Sequence

www.national.com

7