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| PartNumber | XR77129ELB-F | XR77129ELBTR-F | XR77129ELBMTR-F |
| Description | Switching Controllers Quad Channel Programmable Digital Buck Controller 40V. | Switching Controllers Quad Channel Programmable Digital Buck Controller 40V | Switching Controllers Quad Channel Programmable Digital Buck Controller 40V |
| Manufacturer | MaxLinear | Exar | Exar Corporation |
| Product Category | Switching Controllers | PMIC - Voltage Regulators - DC DC Switching Controllers | PMIC - Voltage Regulators - DC DC Switching Controllers |
| RoHS | Y | Details | - |
| Mounting Style | SMD/SMT | SMD/SMT | - |
| Package / Case | TQFN-EP-44 | TQFN-EP-44 | - |
| Packaging | Tray | Reel | Tape & Reel (TR) Alternate Packaging |
| Height | 0.8 mm | - | - |
| Length | 7 mm | - | - |
| Series | XR77129 | XR77129 | - |
| Width | 7 mm | - | - |
| Brand | MaxLinear | Exar | - |
| Moisture Sensitive | Yes | - | - |
| Product Type | Switching Controllers | - | - |
| Factory Pack Quantity | 260 | - | - |
| Subcategory | PMIC - Power Management ICs | - | - |
| Package Case | - | - | 44-WFQFN Exposed Pad |
| Operating Temperature | - | - | -40°C ~ 125°C (TJ) |
| Output Type | - | - | Transistor Driver |
| Function | - | - | Step-Down |
| Supplier Device Package | - | - | 44-TQFN (7x7) |
| Number of Outputs | - | - | 4 |
| Topology | - | - | Buck |
| Voltage Supply Vcc Vdd | - | - | 6 V ~ 40 V |
| Frequency Switching | - | - | 105kHz ~ 1.23MHz |
| Control Features | - | - | Enable |
| Output Configuration | - | - | Positive |
| Output Phases | - | - | 1 |
| Duty Cycle Max | - | - | |
| Synchronous Rectifier | - | - | Yes |
| Clock Sync | - | - | No |
| Serial Interfaces | - | - | I2C, SMBus |