Datasheet

LP38691, LP38693
www.ti.com SNVS321K –JANUARY 2005–REVISED APRIL 2013
ABSOLUTE MAXIMUM RATINGS
(1)(2)
Storage Temperature Range −65°C to +150°C
Lead Temp. (Soldering, 5 seconds) 260°C
ESD Rating
(3)
2 kV
Power Dissipation
(4)
Internally Limited
V(max) All pins (with respect to GND) -0.3V to 12V
I
OUT
(5)
Internally Limited
Junction Temperature −40°C to +150°C
(1) Absolute maximum ratings indicate limits beyond which damage to the component 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, see Electrical
Characteristics. Specifications do not apply when operating the device outside of its rated operating conditions.
(2) If Military/Aerospace specified devices are required, please contact the Texas Instruments Sales Office/ Distributors for availability and
specifications.
(3) ESD is tested using the human body model which is a 100pF capacitor discharged through a 1.5k resistor into each pin.
(4) At elevated temperatures, device power dissipation must be derated based on package thermal resistance and heatsink values (if a
heatsink is used). The junction-to-ambient thermal resistance ( θ
J-A
) for the PFM is approximately 90°C/W for a PC board mounting with
the device soldered down to minimum copper area (less than 0.1 square inch). If one square inch of copper is used as a heat dissipator
for the PFM, the θ
J-A
drops to approximately 50°C/W. The SOT-223 package has a θ
J-A
of approximately 125°C/W when soldered down
to a minimum sized pattern (less than 0.1 square inch) and approximately 70°C/W when soldered to a copper area of one square inch.
The θ
J-A
values for the WSON package are also dependent on trace area, copper thickness, and the number of thermal vias used (refer
to the TI (AN-1187 Application Report) and the WSON MOUNTING section in this datasheet). If power dissipation causes the junction
temperature to exceed specified limits, the device will go into thermal shutdown.
(5) If used in a dual-supply system where the regulator load is returned to a negative supply, the output pin must be diode clamped to
ground.
OPERATING RATINGS
V
IN
Supply Voltage 2.7V to 10V
Operating Junction Temperature Range −40°C to +125°C
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