L7987TR
Active61 V 3 A ASYNCHRONOUS STEP-DOWN SWITCHING REGULATOR WITH ADJUSTABLE CURRENT LIMITATION
L7987TR
Active61 V 3 A ASYNCHRONOUS STEP-DOWN SWITCHING REGULATOR WITH ADJUSTABLE CURRENT LIMITATION
Technical Specifications
Parameters and characteristics for this part
| Specification | L7987TR |
|---|---|
| Current - Output | 3 A |
| Frequency - Switching [Max] | 1.5 MHz |
| Frequency - Switching [Min] | 250 kHz |
| Function | Step-Down |
| Mounting Type | Surface Mount |
| Number of Outputs | 1 |
| Operating Temperature [Max] | 150 °C |
| Operating Temperature [Min] | -40 °C |
| Output Configuration | Positive |
| Output Type | Adjustable |
| Package / Case | 16-TSSOP (0.173", 4.40mm Width) Exposed Pad |
| Supplier Device Package | 16-HTSSOP |
| Synchronous Rectifier | False |
| Topology | Buck |
| Voltage - Input (Max) [Max] | 61 V |
| Voltage - Input (Min) [Min] | 4.5 V |
| Voltage - Output (Max) [Max] | 61 V |
| Voltage - Output (Min/Fixed) | 0.8 V |
Pricing
Prices provided here are for design reference only. For realtime values and availability, please visit the distributors directly
Description
General part information
L7987 Series
The L7987 device is a step-down monolithic switching regulator able to deliver up to 3 A DC. The output voltage adjustability ranges from 0.8 V to VIN. The wide input voltage range and the 100% duty cycle capability meet the fail safe specifications for industrial systems. The embedded switchover feature on the VBIASpin maximizes the efficiency at light load. The adjustable current limitation, designed to select the inductor RMS current accordingly with the nominal output current, and the high switching frequency capability make the size of the application compact. Pulse-by-pulse current sensing with digital frequency foldback implements an effective constant current protection over the different application conditions. The peak current foldback decreases the stress of the power components in heavy short-circuit condition. The PGOOD open collector output can also implement output voltage sequencing during the power-up phase. Multiple devices can be synchronized sharing the SYNCH pin to prevent beating noise in low noise applications like sensors with A/D conversion.
