MaxLinear

SP7648

Low Reference High Efficiency Boost Regulator

Topologie: Boost
Eingangsspannung (min.): 2.70 V
Eingangsspannung (max.): 4.50 V
Ausgang 1: 5.50 V / 0.800 A

Erstveröffentlichung am 19.11.2012, Version 2.0.0 vom

Beschreibung

The SP7648 is an ultra-low quiescent current,high efficiency step-up DC-DC converter idealfor single cell Li-Ion or dual cell alkalinebattery applications to drive various LEDs. TheSP7648 combines low quiescent current andexcellent light-load efficiency of PFM control.The SP7648 features synchronous rectification,a 0.3 charging switch, an anti-ringinginductor switch, under-voltage lockout andprogrammable inductor peak current. Thedevice can be shut down by a 1nA active LOWshutdown pin. A very low 0.288V referencevoltage is optimized for driving a constantcurrent load.

Merkmale

  • True Shutdown
  • 700mA Output Current at 3.3V Input; 4.2V output
  • 92% Efficiency from 2.7VIN to 3.3VOUT
  • 2.7V to 4.5V Wide Input Voltage Range
  • 5V Fixed or Adjustable Output0.3ohm Switch
  • Integrated Synchronous Rectifier:0.3
  • Anti-Ringing Switch Technology
  • Programmable Inductor Peak Current
  • Logic Shutdown Control
  • Low 0.8V or 0.288V Reference Voltage
  • Small 10-pin DFN and MSOP Package

Artikel

  Artikel Nr. SPEC Produktserie L
(µH)
L1
(µH)
IR
(A)
IR 1
(A)
ISAT
(A)
ISAT 1
(A)
RDC typ.
(mΩ)
RDC max.
(mΩ)
RDC1 typ
(mΩ)
RDC1 max.
(mΩ)
fres
(MHz)
fres 1
(MHz)
Muster
744042004 PDF WE-TPC SMT-Speicherdrossel 4.7 4.7 1.72 1.72 1.65 1.65 70 82 70 82 70 70
744042006 PDF WE-TPC SMT-Speicherdrossel 6.8 6.8 1.5 1.5 1.25 1.25 80 100 80 100 60 60