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LM2937ET-3.3 Fiches technique(PDF) 1 Page - Texas Instruments

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No de pièce LM2937ET-3.3
Description  LM2937-2.5, LM2937-3.3 400mA and 500mA Voltage Regulators
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Fabricant  TI1 [Texas Instruments]
Site Internet  http://www.ti.com
Logo TI1 - Texas Instruments

LM2937ET-3.3 Fiches technique(HTML) 1 Page - Texas Instruments

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LM2937-2.5, LM2937-3.3
www.ti.com
SNVS015E – FEBRUARY 1998 – REVISED APRIL 2013
LM2937-2.5, LM2937-3.3 400mA and 500mA Voltage Regulators
Check for Samples: LM2937-2.5, LM2937-3.3
1
FEATURES
DESCRIPTION
The LM2937-2.5 and LM2937-3.3 are positive voltage
2
Fully Specified for Operation Over
−40°C to
regulators capable of supplying up to 500 mA of load
+125°C
current. Both regulators are ideal for converting a
Output Current in Excess of 500 mA (400mA
common 5V logic supply, or higher input supply
for SOT-223 package)
voltage, to the lower 2.5V and 3.3V supplies to power
VLSI ASIC's and microcontrollers. Special circuitry
Output Trimmed for 5% Tolerance Under All
has been incorporated to minimize the quiescent
Operating Conditions
current to typically only 10 mA with a full 500 mA load
Wide Output Capacitor ESR Range, 0.01
Ω up
current when the input to output voltage differential is
to 5
Ω
greater than 5V.
Internal Short Circuit and Thermal Overload
The LM2937 requires an output bypass capacitor for
Protection
stability. As with most regulators utilizing a PNP pass
Reverse Battery Protection
transistor, the ESR of this capacitor remains a critical
design parameter, but the LM2937-2.5 and LM2937-
60V Input Transient Protection
3.3
include
special
compensation
circuitry
that
Mirror Image Insertion Protection
relaxes ESR requirements. The LM2937 is stable for
all ESR ratings less than 5
Ω. This allows the use of
low ESR chip capacitors.
The
regulators
are
also
suited
for
automotive
applications, with built in protection from reverse
battery connections, two-battery jumps and up to
+60V/
−50V load dump transients. Familiar regulator
features such as short circuit and thermal shutdown
protection are also built in.
Connection Diagrams
Figure 1. TO-220 Plastic Package
Figure 2. SOT-223 Plastic Package
Front View
Front View
See Package Number NDE0003B
See Package Number DCY0004A
Figure 3. DDPAK/TO-263 Surface-Mount Package
Figure 4. DDPAK/TO-263 Surface-Mount Package
Top View
Side View
See Package Number KTT0003B
See Package Number KTT0003B
1
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
2
All trademarks are the property of their respective owners.
PRODUCTION DATA information is current as of publication date.
Copyright © 1998–2013, Texas Instruments Incorporated
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.


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