Datenblatt-Suchmaschine für elektronische Bauteile |
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LM138KG-MW8 Datenblatt(PDF) 10 Page - Texas Instruments |
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LM138KG-MW8 Datenblatt(HTML) 10 Page - Texas Instruments |
10 / 34 page ADJ VOUT Q24 R26 0.03 R25 3 R24 160 R22 160 R23 18 k R20 13 k R21 400 R18 130 R19 370 R16 6.7 k R17 12 k Q25 Q26 Q21 Q20 Q18 Q16 C3 5 pF R14 12 k R15 2.4 k Q21 D2 6.3 V D3 6.3 V VIN Q19 Q17 Q15 Q14 Q13 Q12 Q11 Q9 Q7 Q5 Q3 R13 5.1 k R12 72 R11 5.8 k R10 4.1 k R9 180 R7 130 R27 4 k R8 12.4 k 6 V Q10 Q8 Q4 Q1 Q2 R1 310 R2 310 R3 190 R4 82 R5 5.6 k R6 200 k Q6 C1 30 pF C2 30 pF Q27 D1 6.3 V Copyright © 2017, Texas Instruments Incorporated 10 LM138QML SNVSAA9 – OCTOBER 2017 www.ti.com Product Folder Links: LM138QML Submit Documentation Feedback Copyright © 2017, Texas Instruments Incorporated 7 Detailed Description 7.1 Overview The LM138QML device is an adjustable, three-terminal, positive-voltage regulator capable of supplying more than 5 A over an output-voltage range of 1.2 V to 32 V. It requires only two external resistors to set the output voltage. The LM138QML device features a typical line regulation of 0.005% and typical load regulation of 0.1%. It includes time-dependent current limiting, thermal overload protection, and safe operating area protection. Overload protection remains functional even if the ADJUST terminal is disconnected. The LM138QML devices are versatile in their applications, including uses in programmable output regulation and local on-card regulation. Or, by connecting a fixed resistor between the ADJUST and OUTPUT terminals, the LM138QML device can function as a precision current regulator. An optional output capacitor can be added to improve transient response. The ADJUST terminal can be bypassed to achieve very high ripple-rejection ratios, which are difficult to achieve with standard three-terminal regulators. 7.2 Functional Block Diagram 7.3 Feature Description 7.3.1 NPN Darlington Output Drive NPN Darlington output topology provides naturally low output impedance and an output capacitor is optional. To support maximum current and lowest temperature, 3-V headroom is recommended (VI – VO). 7.3.2 Overload Block Overcurrent and overtemperature shutdown protects the device against overload or damage from operating in excessive heat. 7.3.3 Programmable Feedback An op amp with 1.25-V offset input at the ADJUST terminal provides easy output voltage or current, but not both, programming. For current regulation applications, a single resistor whose resistance value is 1.25 V/IO and power rating is greater than 1.25 V2/R must be used. For voltage regulation applications, two resistors set the output voltage. |
Ähnliche Teilenummer - LM138KG-MW8 |
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Ähnliche Beschreibung - LM138KG-MW8 |
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