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Analog Devices MAX38886 | Demoboard MAX38886EVKIT
2.5V to 5.0V, 0.5A/2.5A, Charge/Discharge Regulator for Supercapacitor Backup Applications
Overview
| Topology | Buck Converter |
| Output 1 | 3.36 V |
Description
The MAX38886 evaluation kit (EV kit) evaluates the MAX38886 IC. The MAX38886 is a super cap backup regulator designed to transfer power between a super cap and a system supply rail. When the main battery is present and above the minimum system supply voltage, the regulator charges the super cap at up to a 500mA rate. Once the super cap is charged, the circuit draws only 3μA of current while it maintains the super cap in its ready state. When the main battery is removed, the regulator prevents the system from dropping below the minimum operating voltage, discharging the super cap at up to a 2.5A peak inductor current. Multiple MAX38886 ICs can be connected in parallel for higher current applications. The MAX38886 is externally programmable for minimum and maximum super cap voltage, minimum system voltage, and maximum charge and discharge currents. The internal DC-DC converter requires only a 1μH inductor and a 22μF capacitor.
Features
- 2.99V to 3.36V System Output Voltage Range
- 0.5V to 2.71V Super Cap Voltage Range
- 2.5A Peak Discharge Current
- Resistor-Adjustable Voltage and Current Thresholds
- Proven 2-Layer, 2oz Copper PCB Layout
- Compact Solution Size
- Fully Assembled and Tested
Typical applications
- Handheld Industrial Equipment
- Portable Devices with a Removable Battery, Portable Computers
More information
Products
Order Code | Datasheet | Simulation | Downloads | Status | Product series | C | Tol. C | VR(V (DC)) | Size | Operating Temperature | DF(%) | RISO | Ceramic Type | L(mm) | W(mm) | H(mm) | Fl(mm) | Packaging | L(µH) | IRP,40K(A) | ISAT,10%(A) | ISAT,30%(A) | RDC max.(mΩ) | fres(MHz) | Mount | Samples | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| WCAP-CSGP MLCCs 6.3 V(DC), 22 µF, ±20% | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWCAP-CSGP MLCCs 6.3 V(DC) | Capacitance22 µF | Capacitance±20% | Rated Voltage6.3 V (DC) | Size0805 | Operating Temperature -55 °C up to +85 °C | Dissipation Factor15 % | Insulation Resistance0.005 GΩ | Ceramic TypeX5R Class II | Length2 mm | Width1.25 mm | Height1.25 mm | Pad Dimension0.5 mm | Packaging7" Tape & Reel | – | – | – | – | – | – | – | |||||
 | WE-LHMI SMT Power Inductor, –, – | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWE-LHMI SMT Power Inductor | – | – | – | Size4020 | Operating Temperature -40 °C up to +125 °C | – | – | – | Length4.45 mm | Width4.06 mm | Height1.8 mm | – | – | Inductance1 µH | Performance Rated Current6.2 A | Saturation Current @ 10%6.5 A | Saturation Current @ 30%12.5 A | DC Resistance27 mΩ | Self Resonant Frequency89 MHz | MountSMT |