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ReferenzdesignLTC7138

Analog Devices LTC7138

High Efficiency, 140V 400mA Step-Down Regulator

Details

TopologieAbwärtswandler
Eingangsspannung4-90 V
Ausgang 112 V / 0.8 A

Beschreibung

The LTC®7138 is a high efficiency step-down DC/DC regulator with internal power switch that draws only 12μA typical DC supply current while maintaining a regulated output voltage at no load.

The LTC7138 can supply up to 400mA load current and features a programmable peak current limit that provides a simple method for optimizing efficiency and for reducing output ripple and component size. The LTC7138’s combination of Burst Mode® operation, integrated power switch, low quiescent current, and programmable peak current limit provides high efficiency over a broad range of load currents.

With its wide input range of 4V to 140V and programmable overvoltage lockout, the LTC7138 is a robust regulator suited for regulating from a wide variety of power sources. Additionally, the LTC7138 includes a precise run threshold and soft-start feature to guarantee that the power system start-up is well-controlled in any environment. A feedback comparator output enables multiple LTC7138s to be connected in parallel for higher current applications.

The LTC7138 is available in a thermally enhanced high voltage-capable 16-lead MSE package with four missing pins.

Eigenschaften

  • Wide Operating Input Voltage Range: 4V to 140V
  • Internal Low Resistance Power MOSFET
  • No Compensation Required
  • Adjustable 100mA to 400mA Maximum Output Current
  • Low Dropout Operation: 100% Duty Cycle
  • Low Quiescent Current: 12μA
  • Wide Output Range: 0.8V to VIN
  • 0.8V ±1% Feedback Voltage Reference
  • Precise RUN Pin Threshold
  • Internal or External Soft-Start
  • Programmable 1.8V, 3.3V, 5V or Adjustable Output
  • Few External Components Required
  • Programmable Input Overvoltage Lockout
  • Thermally Enhanced High Voltage MSOP Package
  • Wide Operating Input Voltage Range: 4V to 140V
  • Internal Low Resistance Power MOSFET
  • No Compensation Required
  • Adjustable 100mA to 400mA Maximum Output Current
  • Low Dropout Operation: 100% Duty Cycle
  • Low Quiescent Current: 12μA
  • Wide Output Range: 0.8V to VIN
  • 0.8V ±1% Feedback Voltage Reference
  • Precise RUN Pin Threshold
  • Internal or External Soft-Start
  • Programmable 1.8V, 3.3V, 5V or Adjustable Output
  • Few External Components Required
  • Programmable Input Overvoltage Lockout
  • Thermally Enhanced High Voltage MSOP Package

Typische Anwendungen

  • Industrial Control Supplies
  • Automotive
  • Avionics
  • Portable Instruments
  • Distributed Power Systems
  • Battery-Operated Devices
  • Medical Devices

Weiterführende Informationen

Artikeldaten

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Artikel Nr.
Daten­blatt
Simu­lation
Downloads
Status
Produktserie
L(µH)
ISAT,10%(A)
ISAT,30%(A)
IR,40K(A)
IRP,40K(A)
RDC max.(mΩ)
fres(MHz)
Bauform
Version
MusterVerfügbarkeit & Muster
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7447709101
SPECWE-PD Speicherdrossel, 100 µH, 3.1 A

Anstehende PCN

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Verfügbarkeit
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Downloads9 Dateien

Status Aktivi| Produktion ist aktiv. Erwartete Lebenszeit: >10 Jahre.
ProduktserieWE-PD Speicherdrossel
Induktivität100 µH
Sättigungsstrom 13.1 A
Sättigungsstrom @ 30%3.8 A
Nennstrom2.5 A
Performance Nennstrom3.2 A
Gleichstromwiderstand110 mΩ
Eigenresonanzfrequenz4.3 MHz
Bauform1210 
VersionGestanzt 
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