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)
IRP,40K
(A)
RDC max.
(mΩ)
fres
(MHz)
BauformVersion Muster
7447789001SPEC
8 Dateien WE-PD SMT-Speicherdrossel 1 7.9 12 115 7332 Robust
7447789002SPEC
8 Dateien WE-PD SMT-Speicherdrossel 2.2 5.6 23 67 7332 Robust
7447789003SPEC
8 Dateien WE-PD SMT-Speicherdrossel 3.3 4.9 30 61 7332 Robust
7447789004SPEC
8 Dateien WE-PD SMT-Speicherdrossel 4.7 4.2 35 45 7332 Robust
7447789006SPEC
8 Dateien WE-PD SMT-Speicherdrossel 6.8 3.75 44 38 7332 Robust
744778910SPEC
8 Dateien WE-PD SMT-Speicherdrossel 10 2.9 72 32 7332 Robust
7447789112SPEC
8 Dateien WE-PD SMT-Speicherdrossel 12 2.65 98 27 7332 Robust
7447789115SPEC
8 Dateien WE-PD SMT-Speicherdrossel 15 2.25 130 26 7332 Robust
7447789118SPEC
8 Dateien WE-PD SMT-Speicherdrossel 18 2.1 140 24 7332 Robust
7447789122SPEC
8 Dateien WE-PD SMT-Speicherdrossel 22 2.1 190 20 7332 Robust
7447789127SPEC
8 Dateien WE-PD SMT-Speicherdrossel 27 2 210 18 7332 Robust
Muster
Artikel Nr. Daten­blatt Simu­lation Downloads ProduktserieL
(µH)
IRP,40K
(A)
RDC max.
(mΩ)
fres
(MHz)
BauformVersion Muster