Analog Devices Inc./Maxim Integrated MAX6499ATA/V+

The MAX6499ATA/V+ monitors external resistor-divider signals at OVSET and UVSET and drives the GATE of a separate nMOSFET. The MOSFET can connect the load when the monitored voltage is inside the programmed window and disconnect it during an overvoltage or undervoltage fault. The MAX6499 also supports a limiter configuration; choosing switch versus limiter behavior depends on the sense-network connection and complete power-stage design.

The manufacturer lists MAX6499ATA/V+ in an 8-pin TDFN exposed-pad package and shows a 3 mm × 3 mm package family in the datasheet. The LCDChip catalog's recorded name is 8-WQFN Exposed Pad. These naming conventions are not a substitute for comparing the official outline, pad dimensions, orientation and land pattern.

Layout checks

• Verify pin 1 and eight-pin orientation with the manufacturer's drawing.
• Connect the exposed pad to the ground plane for the specified thermal path.
• Confirm the exact package outline and PCB footprint rather than assuming WQFN and TDFN names imply identical dimensions.

The catalog's production JPG is currently missing. The expected image path is retained for review, but it must not be used as a footprint drawing.

MAX6499 pin assignments follow the manufacturer's top-view diagram and pin-description table.

Exposed pad: internally connected to GND; connect it to the ground plane for a low thermal-resistance path.

The electrical table uses VIN = 14 V, CGATE = 6 nF and TA = −40 °C to +125 °C unless otherwise noted; typical values are at +25 °C. Consult the complete datasheet for conditions and maximum ratings.

MAX6499ATA/V+T is the manufacturer's tape-and-reel ordering form for the /V variant; verify packing requirements before substitution. MAX6499ATA+ lacks the /V automotive-qualification designation. MAX6495–MAX6498 family members differ in pin count or fault functions and are not represented as drop-in replacements. Recheck pinout, CLEAR behavior, UVSET function, thresholds, package outline, qualification and external MOSFET design for any alternate.

No internal alternative-product link is asserted without an exact LCDChip catalog match.

Analog Devices lists MAX6499ATA/V+ as an orderable MAX6499 production model in an exposed-pad TDFN package. The manufacturer's Rev. 18 family datasheet identifies the /V MAX6499 option as automotive qualified; obtain current manufacturer qualification and change-control documents for project approval.

Verify the exact MAX6499ATA/V+ orderable suffix, marking, package geometry and traceability documents against current manufacturer data. Automotive qualification is tied to the exact /V model and its documentation, not to every member of the MAX6499 family. The catalog package picture is pending and does not establish supplied-device identity.

Evaluate external MOSFET voltage, current, safe operating area and heat sinking under the actual transient waveform. Verify latch reset, output-capacitor discharge energy, divider tolerance and the manufacturer land pattern. Resolve the catalog WQFN-versus-manufacturer TDFN naming and restore the missing production JPG before publication.