MAX863

Dual, High-Efficiency, PFM, Step-Up DC-DC Controller

Smallest Dual-Output Step-Up Converter Powers Logic and LCD or Flash from 1.5V Input


Please check latest availability status for a specific part variant.

Description

The MAX863 dual-output DC-DC converter contains two independent step-up controllers in a single compact package. This monolithic Bi-CMOS design draws only 85µA when both controllers are on. The input range extends down to 1.5V, permitting use in organizers, translators, and other low-power hand-held products. The MAX863 provides 90% efficiency at output loads from 20mA to over 1A. This space-saving device is supplied in a 16-pin QSOP package that fits in the same area as an 8-pin SOIC.

The device uses a current-limited, pulse-frequency-modulated (PFM) control architecture that reduces start-up surge currents and maintains low quiescent currents for excellent low-current efficiency. Each controller drives a low-cost, external, N-channel MOSFET switch, whose size can be optimized for any output current or voltage.

In larger systems, two MAX863s can be used to generate 5V, 3.3V, 12V, and 28V from just two or three battery cells. An evaluation kit (MAX863EVKIT) is available to speed designs. For a single-output controller, refer to the MAX608 and MAX1771 data sheets.
MAX863: Typical Operating Circuit MAX863: Typical Operating Circuit Enlarge+

Key Features

  • Smallest Dual Step-Up Converter: 16-Pin QSOP
  • 90% Efficiency
  • 1.5V Start-Up Voltage
  • 85µA Max Total Quiescent Supply Current
  • 1µA Shutdown Mode
  • Independent Shutdown Inputs
  • Drives Surface-Mount, Dual N-Channel MOSFETs
  • Low-Battery Input/Output Comparator
  • Step-Up/Down Configurable

Applications/Uses

  • 2- and 3-Cell Portable Equipment
  • Dual Supply (Logic and LCD)
  • Handheld Instruments (PDAs, Palmtops)
  • Organizers
  • Palmtop Computers
  • PDAs and Other Handheld Devices
  • Translators

See parametric specs for Step-Up Switching Regulators (102)


Part NumberVIN
(V)
VIN
(V)
VOUT1
(V)
IOUT1
(A)
(min)(max)(min)(max)
MAX863 1.5111.252

Pricing Notes:
This pricing is BUDGETARY, for comparing similar parts. Prices are in U.S. dollars and subject to change. Quantity pricing may vary substantially and international prices may differ due to local duties, taxes, fees, and exchange rates. For volume-specific and version-specific prices and delivery, please see the price and availability page or contact an authorized distributor.

MAX863EVKIT: Evaluation Kit for the MAX863
Product Reliability Reports: MAX863.pdf 
Device   Fab Process   Technology   Sample size   Rejects   FIT at 25°C   FIT at 55°C   Material Composition  

Note : The failure rates are summarized by technology and mapped to the associated material part numbers. The failure rates are highly dependent on the number of units tested.

Quality Management System >
Environmental Management System >

 
Status:
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