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Diodes Incorporated AP65450SP | Demoboard AP65450SP-EVM

4A, 18V, 650kHz ADAPTIVE COT STEP-DOWN CONVERTER

Details

TopologieAbwärtswandler
Eingangsspannung12 V
Ausgang 11.05 V / 4 A
IC-Revision2.0

Beschreibung

The AP65450 is an adaptive constant on-time mode synchronous buck converter providing high efficiency, excellent transient response and high DC output accuracy for low-voltage regulation in digital TV and monitor.

The constant-on-time control scheme handles wide input/output voltage ratios and provides low external component count. The internal proprietary circuit enables the device to adopt both low equivalent series resistance (ESR) output capacitors, such as SP-CAP or POSCAP and ultra-low ESR ceramic capacitors.

The adaptive on-time control supports seamless transition between continuous conduction mode (CCM) at higher load conditions and discontinuous conduction mode (DCM) at lighter load conditions. DCM allows AP65450 to maintain high efficiency at light load conditions. The AP65450 also features programmable soft-start, UVLO, OTP and OCP to protect the circuit.

This IC is available in SO-8EP package

Eigenschaften

  • Fixed Frequency Emulated Constant On-time Control
  • Good Stability Independent of the Output Capacitor ESR
  • Fast Load Transient Response
  • Synchronous Rectification: 65mΩ Internal High-side Switch and
  • 36mΩ Internal Low-side Switch
  • Wide Input Voltage Range: 4.5V to 18V
  • Output Voltage Range: 0.76V to 6V
  • 4A Continuous Output Current
  • 650kHz Switching Frequency
  • Built-in Over Current Limit
  • Built-in Thermal Shutdown Protection
  • Programmable Soft-start
  • Pre-biased Start-up
  • Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2)
  • Halogen and Antimony Free. “Green” Device (Note 3)

Remarks:A 1μH to 3.3μH inductor with a DC current rating of at least 25% percent higher than the maximum load current is recommended for mostapplications.

Table 2 Recommended Component SelectionRefer page no.10

Typische Anwendungen

  • Consumer Electronics
  • Set-Top Boxes
  • Green Electronics
  • Gaming Consoles
  • Home Audio
  • Flat Screen TV Sets and Monitors
  • Distributed power systems
  • Network Systems
  • FPGA, DSP and ASIC Supplies

Weiterführende Informationen

Artikeldaten

Artikel Nr. Daten­blatt Downloads ProduktserieCTol. CVR
(V (DC))
BauformDF
(%)
KeramiktypL
(mm)
W
(mm)
H
(mm)
Technische ArtikelnummerL
(µH)
IR
(A)
LR
(µH)
ISAT
(A)
RDC
(mΩ)
fres
(MHz)
MaterialVersion Muster
885012207098
STE ALT EAG CAD LTS PSP CADWCAP-CSGP MLCCs 50 V(DC)100 nF ±10% 50 0805 2.5 X7R Klasse II 2 1.25 0.8 X7R0805104K050DFCT10000
885012207051
STE ALT EAG CAD LTS PSP CADWCAP-CSGP MLCCs 16 V(DC)1 µF ±10% 16 0805 5 X7R Klasse II 2 1.25 1.25 X7R0805105K016DFCT10000
885012209028
STE ALT EAG CAD LTS PSP CADWCAP-CSGP MLCCs 25 V(DC)10 µF ±10% 25 1210 5 X7R Klasse II 3.2 2.5 2 X7R1210106K025DFCT10000
744311150
STE ALT EAG CAD LTS PSP SPE IGS CADWE-HCI SMT-Hochstrominduktivität 7040 7 6.9 3.8 1.5 11 1.12 14 6.6 72 Superflux SMT
Muster
Artikel Nr. Daten­blatt Downloads ProduktserieCTol. CVR
(V (DC))
BauformDF
(%)
KeramiktypL
(mm)
W
(mm)
H
(mm)
Technische ArtikelnummerL
(µH)
IR
(A)
LR
(µH)
ISAT
(A)
RDC
(mΩ)
fres
(MHz)
MaterialVersion Muster