IC-Hersteller Analog Devices

IC-Hersteller (95)

Analog Devices LT3686

37V/1.2A Step-Down Regulator in 3mm × 3mm DFN

Details

TopologieAbwärtswandler
Eingangsspannung3.6-37 V
Schaltfrequenz300-2500 kHz
Ausgang 11.2 A
IC-RevisionC

Beschreibung

The LT®3686 is a current mode PWM step-down DC/DC converter with an internal 1.2A power switch, packaged in 10-lead 3mm × 3mm DFN. The wide input range of 3.6V to 37V makes the LT3686 suitable for regulating power from a wide variety of sources, including 24V industrial supplies and automotive batteries. Its high maximum frequency allows the use of tiny inductors and capacitors, resulting in a very small solution. Operating frequency above the AM band avoids interfering with radio reception, making the LT3686 particularly suitable for automotive applications.

Cycle-by-cycle current limit and DA current sense provide protection against fault conditions. Soft-start and frequency foldback eliminate input current surge during start-up. An optional internal regulated active load at the output via the BD pin keeps the LT3686 at full switching frequency at light loads, resulting in low, predictable output ripple above the audio and AM bands. Internal compensation and an internal boost diode reduce external component count.

Eigenschaften

  • Wide Input Range:Operation from 3.6V to 37VOvervoltage Lockout Protects Circuit Through 55V Transients
  • Low Minimum On-Time:Converts 16VIN to 3.3VOUT at 2MHz
  • 1.2A Output Current
  • Adjustable Frequency: 300kHz to 2.5MHz
  • Constant Switching Frequency at Light Loads
  • Tracking and Soft-Start
  • Precision UVLO
  • Short-Circuit Robust
  • IQ in Shutdown <1μA
  • Internally Compensated
  • 10-Lead 3mm × 3mm DFN Package

Remarks

  • Inductor Value Are Given in Page no-13

Typische Anwendungen

  • Distributed Supply Regulation
  • Automotive Systems
  • Battery-Powered Equipment
  • Wall Transformer Regulation

Weiterführende Informationen

Artikeldaten

Artikel Nr. Daten­blatt Simu­lation Downloads ProduktserieL
(µH)
IR
(A)
ISAT
(A)
fres
(MHz)
Montageart Muster
744042001SPEC
8 Dateien WE-TPC SMT-Speicherdrossel 1 2.7 2.6 177 SMT
7440420018SPEC
8 Dateien WE-TPC SMT-Speicherdrossel 1.8 2.35 2.4 100 SMT
7440420027SPEC
8 Dateien WE-TPC SMT-Speicherdrossel 2.7 2.03 2.2 90 SMT
7440420039SPEC
8 Dateien WE-TPC SMT-Speicherdrossel 3.9 1.82 1.7 70 SMT
744042004SPEC
8 Dateien WE-TPC SMT-Speicherdrossel 4.7 1.72 1.65 70 SMT
744042005SPEC
8 Dateien WE-TPC SMT-Speicherdrossel 5.6 1.64 1.35 55 SMT
744042006SPEC
8 Dateien WE-TPC SMT-Speicherdrossel 6.8 1.5 1.25 60 SMT
744042008SPEC
8 Dateien WE-TPC SMT-Speicherdrossel 8.2 1.4 1.1 40 SMT
744042100SPEC
8 Dateien WE-TPC SMT-Speicherdrossel 10 1.3 1 45 SMT
Muster
Artikel Nr. Daten­blatt Simu­lation Downloads ProduktserieL
(µH)
IR
(A)
ISAT
(A)
fres
(MHz)
Montageart Muster