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LM2937L-TQ2-R bảng dữ liệu(PDF) 1 Page - E-Tech Electronics LTD

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Trang chủ  http://e-tech.com.hk
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UNISONIC TECHNOLOGIES CO., LTD
LM2937
LINEAR INTEGRATED CIRCUIT
www.unisonic.com.tw
1 of 10
Copyright © 2013 Unisonic Technologies Co., Ltd
QW-R102-012.I
500mA LOW DROPOUT
VOLTAGE REGULATOR
DESCRIPTION
The UTC LM2937 is a positive voltage regulator capable of supplying
up to 500mA of load current. The use of a PNP power transistor
provides a low dropout voltage characteristic. With a load current of
500mA the minimum input to output voltage differential required for the
output to remain in regulation is typically 0.5V(1V guaranteed maximum
over the full operating temperature range). Special circuitry has been
incorporated to minimize the quiescent current to typically only 10mA
with a full 500mA load current when the input to output voltage
differential is greater than 3V.
The UTC LM2937 requires an output bypass capacitor for stability.
As with most low dropout regulators, the ESR of this capacitor remains
a critical design parameter, but the LM2937 includes special
compensation circuitry that relaxes ESR requirements. The UTC
LM2937
is stable for all ESR below 3Ω.This allows the use of low ESR
chip capacitors.
Ideally suited for automotive applications, the UTC LM2937 will
protect itself and any load circuitry 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.
FEATURES
* Fully specified for operation over -40
C~ +125C
* Output current in excess of 500mA
* Output trimmed for 5% tolerance under all operating conditions
* Typical dropout voltage of 0.5V at full rated load current
* Wide output capacitor ESR range, up to 3Ω
* Reverse battery protection
* Internal short circuit and thermal overload protection
* 60V input transient protection
* Mirror image insertion protection
* Built-in ON/OFF control function
ORDERING INFORMATION
Order Number
Package
Packing
Lead Free
Halogen Free
LM2937L-xx-AA3-R
LM2937G-xx-AA3-R
SOT-223
Tape Reel
LM2937L-xx-TA3-T
LM2937G-xx-TA3-T
TO-220
Tube
LM2937L-xx-TQ2-R
LM2937G-xx-TQ2-R
TO-263
Tape Reel
LM2937L-xx-TQ2-T
LM2937G-xx-TQ2-T
TO-263
Tube
LM2937L-xx-TQ3-R
LM2937G-xx-TQ3-R
TO-263-3
Tape Reel
LM2937L-xx-TQ3-T
LM2937G-xx-TQ3-T
TO-263-3
Tube
LM2937L-xx-TQ5-R
LM2937G-xx-TQ5-R
TO-263-5
Tape Reel
LM2937L-xx-TQ5-T
LM2937G-xx-TQ5-T
TO-263-5
Tube


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