L4954：Voltage regulator with backup and reset, overvoltage protection and low voltage warning
L4954 is a quad output voltage regulator and a three output high side driver.
The IC includes monitoring circuitry to warn the microprocessor of a low voltage condition: the LVWarn, output, sensing the slow dropping of STCAP pins voltage, gives the microprocessor time to store data.
A reset output is generated at REG4’s decay.
External protection must be provided for reverse battery protection.
Key Features
- 4 regulators:
- 10 V (40 mA) low dropout
- 8.5 V (175 mA)
- 5 V (650 mA)
- 5 V (100 mA) standby
- 3 high side drivers:
- 2 A (HSD1)
- 0.3 A (HSD2 & HSD3)
- No external charge pump capacitors are required
- Standby mode controlled by 3 input pins:
- EN1 for REG1, REG2, REG3 and HSD1
- EN2 for HSD2
- EN3 for HSD3
- Individual thermal shutdown
- Logic outputs for supply undervoltage:
- LVWARN
- Reset
- Independent current limiting
- Overvoltage shutdown
- Short circuit protection
- Load dump protection and overvoltage
- Shutdown
Product Specifications
| Description | Version | Size |
|---|---|---|
| DS6894: Quad multifunction voltage regulator for car radio | 2.0 | 190 KB |
Selection Guides
| Description | Version | Size |
|---|---|---|
| Power amplifiers and voltage regulators | 750 KB | |
| Smart power solutions for car body applications | 3.0 | 1 MB |
Sample & Buy
| Part Number | Package | Packing Type | Operating Temperature (°C) (min) | Operating Temperature (°C) (max) | Unit Price (US$) * | Quantity | ECCN (EU) | ECCN (US) | Country of Origin |
|---|---|---|---|---|---|---|---|---|---|
| L4954 | MW 15L | Tube | - | - | - | - | NEC | EAR99 | MOROCCO |
Quality & Reliability
| Part Number | Package | Grade | RoHS Compliance Grade | Material Declaration** |
|---|---|---|---|---|
| L4954 | MW 15L | Automotive | Ecopack1 |
- circuit_diagram_17719_thumbnail.png L4954
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