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vRestrict ,, Drills -- Holes .. Milling // Measures 00 Document 11 Reference 34 tDocu 43 bDocu [[ Nets \\ Busses ]] Pins ^^ Symbols __ Names `` Values Descript SMDround k LM2937 LM2937 7 IC S H 6 h '' < ! - G$1 - 0 P 7 IC { 6 '' < ! - G$1 - 0 P 7 IC 6 '' < ! - G$1 - 0 P 7 IC 6 '' < - G$1
LM2937 gA LM2937 , 8c ! IN , 8c OUT , Ȝ GND " ^Xp X9 " ^X9) 9 " ^) 9) p " ^) p Xp 1 _) ) " >NAME 1 `XX" >VALUE Wr GND , @ e GND@ 1 _1 8c " >NAME j LM2937 k7y TO263 + 1 GND + Ȝ 1 IN + 8c 1 OUT + vB f GND@ " 039J p J { " 03p J p { " 03p p m { " 03p m p | { " 03p | 9| { " 039| 9m { " 039m 9 { " 039 9J { " 039 p { " 039m p m { " 039J 9 { " 039 ^R { " 03^R { " 03 p { " 03p p J { % 3Ȝp { " 03Ȝo Ȝ2] " 03 o 2] " 038c o 8c 2] 1 ,k! >NAME 1 Ԕ >VALUE" 09o p o { " 0^RM M { " 0ȜjJ Ȝ8c ] " 0 jJ 8c ] " 08c jJ 8c 8c ] # SOT223+ + IN + + GND + FZ + OUT & 3~rF > & 3" q & 3ؔ q & 3lI q(k 1 jJ 8c 0 4 " 1 tE " 0 " 0tE " 2tE tE & 3~rF > & 3" q & 3ؔ q & 3lI q(k 1 Ȝ >NAME 1 Ȝh >VALUE+ y PF* GND@ ) +" * Ȝ IN * GND * 8c OUT % lK\ 1 9
|( >NAME 1 99( >VALUE" 0 p x{ " 0 |C{ " 09x|C{ " 0p 6 p x{ " 09x96 { & /1 z8c & ztE 8c & 1 F8c & FtE " 8c & " 1 ~@ 8c & ~@ tE 8c & 1 \ 8c & 3z1 tE & 3F1 " tE & 3~@ 1 tE
y [R * Ȝ IN * GND * 8c OUT " 340f 0{ " 0f : 4: { " 1f 0f { " 0f { " 0 { " 0 f { " 0f f : { " 1404 { " 04 TW { " 0TW TW { " 0TW 4 { " 04 4: { 1 ,k2 ( >NAME % 3 rF rF { " 03hM2 2 " 03 ) 2 " 03 ) hM) " 03hM2hM) 1 jl8c ( >VALUE& VT rHr @a & rH @a & rH@a & [0 & 2 [ 0 & jJ [| 0 & 3rH & 3 rH & 3VT r rH * > GND@ = LM2937ET-*
400 and 500 mA Low Dropout Voltage Regulator
NATIONAL SEMICONDUCTOR
created by Peter.Hofmann@ph-tronic.de
10-2004 Rev.0
1112.3.5.8. LM2937IMP-*
400 and 500 mA Low Dropout Voltage Regulator
NATIONAL SEMICONDUCTOR
created by Peter.Hofmann@ph-tronic.de
10-2004 Rev.0
1112.3.5.8. LM2937ES-*
400 and 500 mA Low Dropout Voltage Regulator
NATIONAL SEMICONDUCTOR
created by Peter.Hofmann@ph-tronic.de
10-2004 Rev.0
1112.3.5.8. LM2937ET*
400 and 500 mA Low Dropout Voltage Regulator
NATIONAL SEMICONDUCTOR
created by Peter.Hofmann@ph-tronic.de
10-2004 Rev.0
-1-1-1-2.-3.-5,-8.
VOLTAGE REGULATOR
-
NATIONAL SEMICONDUCTOR
400 and 500 mA Dropout Voltage Regulator
created by Peter.Hofmann@ph-tronic.de
10-2004 Rev. 0
Based on the following source:
DESCRIPTION
The LM2937 is a positive voltage regulator capable of supplying up to 500 mA of load current. The use of a PNP power transistor provides a low dropout voltage characteristic. With a load current of 500 mA 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 10 mA with a full 500 mA load current when the input to output voltage differential is greater than 3V.
The 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 LM2937 is stable for all ESR below 3Ohm. This allows the use of low ESR chip capacitors.
Ideally suited for automotive applications, the 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.
KEY FEATURES
- Fully specified for operation over -40C to +125C
- Output current in excess of 500 mA
- 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 3Ohm
- Internal short circuit and thermal overload protection
- Reverse battery protection
- 60V input transient protection
- Mirror image insertion protection TO-263 SOT-223 TO220(V) TO-220
grid 2,54mm, vertikal TO220(H) TO-220
grid 2,54mm, horizontal L