L487 LDO Voltage Regulator with Reset 5V Pentawatt
The L487 LDO Voltage Regulator with Reset 5V Pentawatt is a monolithic integrated circuit in a Pentawatt package, designed to provide a stable 5 V output with ±4 % accuracy and deliver up to 500 mA of continuous current. It features very low dropout (0.6–0.8 V at full load) for operation down to battery cranking levels (as low as 6 V input), and includes a power‑on/power‑off reset pulse to reliably initialize microprocessor systems. The device incorporates overvoltage, reverse voltage, clamp‑diode, short‑circuit, and thermal‑shutdown protections for enhanced robustness in automotive and industrial environments
Features
- Precise 5 V ±4 % regulated output up to 500 mA continuous.
- Very low dropout voltage: 0.6 V typical, 0.8 V maximum at 500 mA.
- Integrated power‑on/power‑off reset pulse with programmable delay (≈30 ms).
- Overvoltage and reverse‑voltage protection up to ±80 V transient.
- Short‑circuit and thermal‑shutdown protection for fault resilience.
- Built‑in clamp diodes on each output channel for inductive‑load dumping.
- Operates from 6 V to 26 V input range.
- Wide junction temperature range: –40 °C to +150 °C.
Specifications
ABSOLUTE MAXIMUM RATINGS
| Characteristic | Symbol | Rating | Unit |
|---|---|---|---|
| Forward input voltage | Vi | 35 | V |
| Reverse input voltage | Vi | –18 | V |
| Positive transient peak voltage (t = 300 ms) | — | 80 | V |
| Negative transient peak voltage (t = 100 ms) | — | –80 | V |
| Operating junction temperature | Top | –40 to 150 | ºC |
| Storage temperature | Tstg | –55 to 150 | ºC |
PINOUT
Dimensions
Applications
- Microprocessor and logic‑device power supply with reliable reset sequencing.
- Automotive electronics requiring operation during engine cranking.
- Industrial control systems exposed to harsh transients.
- Battery‑powered equipment and automotive telematics modules.
- General-purpose 5 V rail in embedded and instrumentation designs.
