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L7987TR Breakout
IC REG BUCK ADJ 3A 4.5-61V HTSSOP16
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Design a Custom BoardAbout This Component
Step-down switching regulator delivering 3A DC output from 4.5V to 61V input range with adjustable output voltage (0.8V to VIN). Features programmable switching frequency (250kHz-1.5MHz), adjustable current limiting, and low quiescent current (1mA typical). Designed for industrial applications including PLCs and 24V bus systems with fail-safe tolerance and thermal shutdown protection.
Package: TSSOP-16 (4.4×5mm) · 16 pins
Why does this need a breakout?
The 0.65mm pitch makes hand soldering difficult and error-prone; a breakout board lets you solder standard headers instead. This package hosts precision analog and mixed-signal ICs like DACs and ADCs that benefit from clean PCB layouts and decoupling placement. Prototyping becomes faster with breadboard-compatible pin headers, eliminating the need for a custom carrier PCB.
Component specifications
ELECTRICAL CHARACTERISTICS
| Manufacturer | STMicroelectronics |
| Part Number | L7987TR |
| Package | TSSOP-16 (4.4×5mm) |
| Pin Count | 16 |
| Current - Output | 3A |
| Frequency - Switching | 250kHz ~ 1.5MHz |
| Number of Outputs | 1 |
| Output Configuration | Positive |
| Output Type | Adjustable |
| Topology | Buck |
| Voltage - Input (Max) | 61V |
| Voltage - Input (Min) | 4.5V |
| Voltage - Output (Max) | 61V |
| Voltage - Output (Min/Fixed) | 0.8V |
What's Included
BILL OF MATERIALS
- 1x L7987TR soldered onto breakout PCB
- Pin headers pre-soldered (2.54mm / 0.1" pitch)
- All IC pins broken out to 2.54mm headers
Breakout Board Design
PCB SPECIFICATIONS