Maxim Integrated MAX16820ATT+T, DC DC Controller, PWM Dimming, Step-Down (Buck) Topology, 2MHz, 4.5V to 28V Supply, 6-TDFN (3x3) Package, -40°C to 125°C.
| Parameter | Value |
|---|---|
| Type | DC DC Controller |
| Mounting type | Surface Mount |
| Voltage | 4.5V |
| Frequency | 2MHz |
| Number of outputs | 1 |
| Operating temperature | -40°C ~ 125°C (TA) |
| Dimming | PWM |
| Package | Tape & Reel (TR); Cut Tape (CT) |
| Topology | Step-Down (Buck) |
| Applications | Lighting |
| Case | 6-WDFN Exposed Pad |
| Internal switch | No |
Rated for -40°C to 125°C operating ambient, this controller fits automotive under-hood, outdoor signage, and industrial lighting. The 6-TDFN package with exposed pad (3x3 mm) needs a thermal via pattern under the pad.
The MAX16820ATT+T is listed as Active and ROHS3 compliant. For new designs, this part is a safe choice without near-term end-of-life risk.
The MAX16820ATT+T is a controller without internal switches, so the maximum LED current depends on the external MOSFET and inductor. With a suitable external N-channel FET and proper thermal management, currents of several amps are achievable. The 2MHz switching frequency limits practical output current to around 3-5 A in most designs due to inductor saturation and MOSFET dissipation.
Yes, the MAX16820ATT+T is ROHS3 compliant.
The evidence does not list a direct pin-compatible second source or alternative. Within the Maxim LED driver controller family, the MAX16820 is the base part; the ATT+T suffix indicates the 6-TDFN package and tape-and-reel. For a drop-in replacement, verify the pinout and switching frequency against other Maxim LED controllers in the same package.