Product Information

MAX38886EVKIT#

MAX38886EVKIT# electronic component of Analog Devices

Datasheet
Power Management IC Development Tools A super cap back-up regulator designed to efficiently transfer power between a super cap and a system supply rail

Manufacturer: Analog Devices
This product is classified as Large/Heavy, additional shipping charges may apply. A customer service representative may contact you after ordering to confirm exact shipping charges



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1: USD 110.0386 ea
Line Total: USD 110.04

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MAX38886EVKIT#
Analog Devices

1 : USD 105.886

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MAX38886EVKIT#
Analog Devices

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Click here for production status of specific part numbers. Evaluates: MAX38886 MAX38886 Evaluation Kit General Description Quick Start The MAX38886 evaluation kit (EV kit) evaluates the Required Equipment MAX38886 IC. The MAX38886 is a super cap backup MAX38886 EV kit regulator designed to transfer power between a super 5V, 3A DC power supply cap and a system supply rail. When the main battery is present and above the minimum system supply voltage, One digital multimeter (DMM) the regulator charges the super cap at up to a 500mA Procedure rate. Once the super cap is charged, the circuit draws only The EV kit is fully assembled and tested. Use the follow- 3A of current while it maintains the super cap in its ready ing steps to verify board operation: state. When the main battery is removed, the regulator prevents the system from dropping below the minimum Caution: Do not turn on power supply until all con- operating voltage, discharging the super cap at up to a nections are completed. 2.5A peak inductor current. Multiple MAX38886 ICs can 1) Verify that a shunt is installed onto pins 1 and 2 and be connected in parallel for higher current applications. jumper JU1 (EV kit enabled). The MAX38886 is externally programmable for mini- 2) Verify that jumper JU2 is opened (No load is connect- mum and maximum super cap voltage, minimum system ed across VSYS and PGND). voltage, and maximum charge and discharge currents. The internal DC-DC converter requires only a 1H induc- 3) Set the power supply output to 3.4V, and disable the tor and a 22F capacitor. power supply. 4) Connect the power supply between the VSYS and Features PGND terminal posts. 2.99V to 3.36V System Output Voltage Range 5) Connect the DMM between the VSC and PGND 0.5V to 2.71V Super Cap Voltage Range terminal posts. 2.5A Peak Discharge Current 6) Enable the power supply and verify that the super cap voltage at VSC is ramping up and stops at about 2.7V. Resistor-Adjustable Voltage and Current Thresholds 7) Disable and disconnect the power supply from the Proven 2-Layer, 2oz Copper PCB Layout VSYS and PGND terminal posts. Compact Solution Size 8) Verify that VSYS drops to about 3V and VSC drops Fully Assembled and Tested to about 2.5V. 9) Install jumper JU2. This connects a 51 load across MAX38886 EV Kit Files VSYS and PGND. FILE DESCRIPTION 10) Verify that VSYS remains at 3V while VSC is ramping MAX38886 EV BOM EV Kit Bill of Material down toward 0.5V. MAX38886 EV PCB Layout EV Kit Layout 11) Verify that VSYS is 0V when VSC drops below 0.5V. MAX38886 EV Schematic EV Kit Schematic Ordering Information appears at end of data sheet. 319-100532 Rev 0 5/20Evaluates: MAX38886 MAX38886 Evaluation Kit Ready Mode Detailed Description of Hardware Once the super cap is charged to its maximum voltage of The MAX38886 EV kit provides a flexible circuit to evalu- 2.7V, the circuit draws only 3A of current while it main- ate the super cap backup regulator. External components tains the super cap in its ready state. The MAX38886 EV allow a wide range of system and super cap voltages as kit maximum super cap voltage is set to 2.7V by resistors well as charging and discharging currents. R1 and R2 with V = 0.5V. FBCH EN Discharge Mode The MAX38886 EV kit provides a jumper (JU1) to enable When the main battery is removed, the regulator or disable the MAX38886. See Table 1 for JU1 jumper discharges the super cap at up to a 2.5A peak inductor settings. current to prevent the system from dropping below the VSYS Load minimum operating voltage. The MAX38886 EV kit mini- The MAX38886 EV kit provides a jumper (JU2) to connect mum operating voltage is set to 2.99V by resistors R5 and a 51 resistive load across VSYS and PGND to simulate R6 with V = 0.5V. FBS a discharging scenario during test. See Table 2 for JU2 Charge/Discharge Current Configuration jumper settings. The MAX38886 EV kit provides a resistor (R4) to config- Charge Mode ure the charge/discharge current rate for the super cap. When the main battery is present and is above the mini- The peak discharge current is set by connecting R4 mum system supply voltage, the regulator charges the between the ISET and GND pins. super cap at up to a 500mA rate. The MAX38886 EV kit I = 2.5A x (20k/R4) DISCHARGE minimum system supply voltage is set to 3.36V by resis- tors R5 and R6 with V = 0.56V. FBS The super cap charging current is internally set to 1/5 of the discharge current. I = 0.5A x (20k/R4) Table 1. EN (JU1) CHARGE Choose a value of R4 between 20k to 100k to ensure JU1 DESCRIPTION accurate current compliance. SHUNT POSITION 1-2* Enabled. EN = VSYS Component Suppliers 2-3 Disabled. EN = PGND SUPPLIER WEBSITE Enabled. EN = VSYS Not Installed (through resistor R9) AVX www.avx.com *Default position Kemet www.kemet.com Murata/TOKO www.murata.com Wurth Electronics www.we-online.com Table 2. VSYS Load (JU2) Note: Indicate that you are using the MAX38886 when contact- JU2 DESCRIPTION ing these component suppliers. SHUNT POSITION Test Mode: A 51 resistive Ordering Information Installed load is connected across VSYS and PGND. PART TYPE Not Installed* Normal operating mode MAX38886EVKIT EV Kit *Default position Denotes RoHS compliance. Maxim Integrated 2 www.maximintegrated.com

Tariff Desc

8543.70.00 Other machines and apparatus Free
13 Signal processors (graphic equalisers, crossovers etc.) 91 Other Free

9027.10.00 Instruments and apparatus for physical or chemical analysis (eg, polarimeters, refractometers, spectrometers, gas or smoke analysis apparatus); instruments and apparatus for measuring or checking viscosity, porosity, expansion, surface tension or the like; instruments and apparatus for measuring or checking quantities of heat, sound or light (including exposure meters); microtomes Free

9031.80.00 MEASURING OR CHECKING INSTRUMENTS, APPLIANCES AND MACHINES, NOT SPECIFIED OR INCLUDED ELSEWHERE IN THIS CHAPTER; PROFILE PROJECTORS Other instruments, appliances and machines Free

9030.31.00 Oscilloscopes, spectrum analysers and other instruments and apparatus for measuring or checking electrical quantities, excluding meters of 9028; instruments and apparatus for measuring or detecting alpha, beta, gamma, x-ray, cosmic or other ionising radiations.
Other instruments and apparatus, for measuring or checking voltage, current, resistance or power Multimeters without a recording device Free

8473.30.00 Parts and accessories of the machines of 8471 AUTOMATIC DATA PROCESSING MACHINES AND UNITS THEREOF; MAGNETIC OR OPTICAL READERS, MACHINES FOR TRANSCRIBING DATA ONTO DATA MEDIA IN CODED FORM AND MACHINES FOR PROCESSING SUCH DATA, NOT ELSEWHERE SPECIFIED OR INCLUDED:
.Other 71 No Weighing less than 1kg Free

8537 BOARDS, PANELS, CONSOLES, DESKS, CABINETS AND OTHER BASES, EQUIPPED WITH TWO OR MORE APPARATUS OF 8535 OR 8536, FOR ELECTRIC CONTROL OR THE DISTRIBUTION OF ELECTRICITY, INCLUDING THOSE INCORPORATING INSTRUMENTS OR APPARATUS OF CHAPTER 90, AND NUMERICAL CONTROL APPARATUS, OTHER THAN SWITCHING APPARATUS OF 8517:
8538 PARTS SUITABLE FOR USE SOLELY OR PRINCIPALLY WITH THE APPARATUS OF 8535, 8536 OR 8537:
8538.10.10 22 For programmable controllers Free
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