This integrated OptiMOS power stage combines a synchronous buck gate driver with high-side and low-side MOSFETs plus an active diode structure. It operates from a 4.25 V to 16 V input, supports 20 A output current, and allows PWM switching from 100 kHz to 1.5 MHz. The device includes on-chip MOSFET current sensing with 5 µA/A gain, bootstrap auto-replenishment, and compatibility with 3.3 V tri-state PWM control. Protection features include overtemperature shutdown, cycle-by-cycle overcurrent protection, high-side MOSFET short detection, and under-voltage protection. It is specified for junction operation from -40 °C to 125 °C and is housed in a 4 mm x 5 mm x 0.9 mm PQFN package.
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Infineon TDA21520 technical specifications.
| Input Voltage | 4.25 to 16V |
| VCC Supply | 4.25 to 5.5V |
| Output Voltage | 0.225 to 5.5V |
| Output Current Capability | 20A |
| Switching Frequency | 100 to 1500kHz |
| Current Sense Gain | 5µA/A |
| Current Sense Reference Voltage | 1.1 to 1.9V |
| Operating Junction Temperature | -40 to 125°C |
| Storage Temperature | -55 to 150°C |
| Package | PQFN 4 x 5 x 0.9mm |
| Moisture Sensitivity Level | 2 |
| Auto Sleep Current | 1.7 typmA |
| Deep Sleep Current | 32 typµA |
| PWM Input Logic | 3.3 tri-state compatibleV |
| Bootstrap Capacitor | 0.22 to 0.56µF |
| Packing Type | Tape & Reel |
| Packing Size | 5000 |
| RoHS Compliant | Yes |
| RoHS Compliant | Yes |
| Halogen Free | Yes |
| Lead-free | No |
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