MaxLinear

XR76203
Demoboard XR76203EVB

40V, 3/5/8A Synchronous Step Down COT Regulator

Topologie: Buck
Eingangsspannung (min.): 24.00 V
Eingangsspannung (max.): 24.00 V
Ausgang 1: 3.30 V / 3.000 A

Erstveröffentlichung am 19.02.2015, Version 1A vom

Beschreibung

The XR76203, XR76205 and XR76208 aresynchronous step-down regulators combining the controller, drivers, bootstrap diode and MOSFETs in a single package for point-of-load supplies. The XR76203, XR76205 and XR76208 have load current ratings of 3A, 5A and 8A respectively. A wide5V to 40V input voltage range allows for single supplyoperation from industry standard 24V ±10%, 18V- 36V, and rectified 18VAC and 24VAC rails. With a proprietary emulated current mode Constant On-Time (COT) control scheme, the XR76203, XR76205 and XR76208 provide extremely fast line and load transient response using ceramic output capacitors. They require no loop compensation, simplifying circuit implementation and reducing overall component count. The control loop alsoprovides 0.07% load and 0.15% line regulation and maintains constant operating frequency. A selectable power saving mode allows the user to operate in discontinuous conduction mode (DCM) at light current loads thereby significantly increasing the converter efficiency.A host of protection features, including over-current, over-temperature, short-circuit and UVLO, helps achieve safe operation under abnormal operating conditions.The XR76203/5/8 are available in a RoHS-compliant, green/halogen-free space-saving QFN 5x5mm package.

Merkmale

  • Controller, drivers, bootstrap diode, MOSFETsintegrated in one package
  • 3/5/8A Step Down Regulator
  • Wide 5V to 40V Input Voltage Range
  • 0.6V Adjustable Output Voltage
  • Proprietary Constant On-Time Control
  • No Loop Compensation Required
  • Ceramic Output Cap. Stable operation
  • Programmable 200ns-2μs On-Time
  • Constant 400kHz-600kHz freq.
  • Selectable CCM or CCM/DCM Operation
  • 30-pin 5x5mm QFN package

Artikel

  Artikel Nr. SPEC Produktserie Pins Reihen Gender Typ IR 1
(A)
Verpackung L
(µH)
IR
(A)
ISAT
(A)
RDC typ.
(mΩ)
RDC max.
(mΩ)
fres
(MHz)
Montageart Fig. P
(mm)
Blade Design Muster
61300111121 PDF WR-PHD 2.54 mm THT Pin Header 1 Single Pin Header Gerade 3 Beutel
61300311121 PDF WR-PHD 2.54 mm THT Pin Header 3 Single Pin Header Gerade 3 Beutel
74437368047 PDF WE-LHMI SMT Speicherdrossel 4.7 7 19 15 15.5 16 SMT
7471287 PDF WA-MTAB Mounting Tabs Männlich Vertikal 2 5.08 6.35 mm