PRODUCT DESCRIPTION
The IR3889 is an easy-to-use, fully integrated dc - dc Buck regulator. The onboard PWM controller and OptiMOS™ FETs with integrated bootstrap diode make IR3889 a small footprint solution, providing high-efficient power delivery. Furthermore, it uses a fast Constant On-Time (COT) control scheme, which simplifies the design efforts and achieves fast control response.
The IR3889 has an internal low dropout voltage regulator, allowing operations with a single supply. It can also operate with an external bias supply, with an extended operating input voltage (PVin) range from 2.0 V to 17 V. The IR3889 is a versatile regulator, offering programmable switching frequency from 600 kHz to 2 MHz, four selectable current limits, four selectable soft-start time, Forced Continuous Conduction Mode (FCCM) and Diode Emulation Mode (DEM) operation.
It also features important protection functions, such as pre-bias start-up, thermally compensated current limit, over voltage and under voltage protection, and thermal shutdown to give required system level security in the event of fault conditions.
PRODUCT PROPERTIES
Product Status | Active |
Function | Step-Down |
Output Configuration | Positive |
Topology | Buck |
Output Type | Adjustable |
Number of Outputs | 1 |
Voltage - Input (Min) | 2V |
Voltage - Input (Max) | 17V |
Voltage - Output (Min/Fixed) | 0.8V |
Voltage - Output (Max) | 17V |
Current - Output | 30A |
Frequency - Switching | 600kHz ~ 2MHz |
Synchronous Rectifier | Yes |
Operating Temperature | -40°C ~ 150°C (TJ) |
Mounting Type | Surface Mount |
Package / Case | 36-PowerVFQFN |
Supplier Device Package | PG-IQFN-36-2 |
Base Product Number | IR3889 |