L4971：1.5A Switching Regulator
The L4971 is a step down monolithic power switching regulator delivering 1.5A at a voltage between 3.3V and 50V (selected by a simple external divider). Realized in BCD mixed technology, the device uses an internal power D-MOS transistor (with a typical Rdson of 0.25Ω) to obtain very high efficency and high switching speed.
A switching frequency up to 300KHz is achievable (the maximum power dissipation of the packages must be observed).
A wide input voltage range between 8V to 55V and output voltages regulated from 3.3V to 50V cover the majority of today’s applications.
Features of this new generations of DC-DC converter include pulse-by-pulse current limit, hiccup mode for short circuit protection, voltage feedforward regulation, soft-start, protection against feedback loop disconnection, inhibit for zero current consumption and thermal shutdown.
The device is available in plastic dual in line, DIP8 for standard assembly, and SO16W for SMD assembly.
Key Features
- PROTECTION AGAINST FEEDBACK DISCONNECTION
- INHIBIT FOR ZERO CURRENT CONSUMPTION
- SOFT START FUNCTION
- THERMAL SHUTDOWN
- ZERO LOAD CURRENT OPERATION
- VOLTAGE FEEDFORWARD
- UP TO 1.5A STEP DOWN CONVERTER
- PRECISE 3.3V (±1%) INTERNAL REFERENCE VOLTAGE
- OPERATING INPUT VOLTAGE FROM 8V TO 55V
- SWITCHING FREQUENCY ADJUSTABLE UP TO 300KHz
- INTERNAL CURRENT LIMITING (PULSE-BY PULSE AND HICCUP MODE)
- OUTPUT VOLTAGE ADJUSTABLE FROM 3.3V TO 50V
产品规格
| Description | Version | Size |
|---|---|---|
| DS1272: 1.5A step down switching regulator | 11.2 | 568 KB |
应用手册
| Description | Version | Size |
|---|---|---|
| AN4070: 250 W grid connected microinverter | 1.0 | 4 MB |
| AN937: Designing with L4971, 1.5 A high efficiency DC-DC converter | 15.2 | 1008 KB |
| AN1941: Low Voltage LED Driver Using L6920D, L4971 and L6902D | 1.5 | 499 KB |
Design Notes & Tips
手册
| Description | Version | Size |
|---|---|---|
| Brochure Power management guide | 05.2016 | 7 MB |
解决方案评估工具
| 型号 | 制造商 | Description |
|---|---|---|
| EVAL4971 | L4971 1.5 A Step Down Switching Regulator Evaluation Board |
样片和购买
| 型号 | Package | Packing Type | Unit Price (US$) * | Quantity | ECCN (EU) | ECCN (US) | Country of Origin |
|---|---|---|---|---|---|---|---|
| L4971 | DIP-8 | Tube | 1.185 | 1000 | NEC | EAR99 | MALAYSIA |
| L4971D | SO-16W | Tube | 1.354 | 1000 | NEC | EAR99 | MALAYSIA |
| L4971D013TR | SO-16W | Tape And Reel | 1.354 | 1000 | NEC | EAR99 | MALAYSIA |
质量和可靠性
| 型号 | Package | Grade | RoHS Compliance Grade | Material Declaration** |
|---|---|---|---|---|
| L4971 | DIP-8 | Industrial | Ecopack2 (**) | md_8w_pdip-wspc-08_cl8w-wspc-u738ba6.pdf md_8w_pdip-wspc-08_cl8w-wspc-u738ba6.xml |
| L4971D | SO-16W | Industrial | Ecopack1 | md_y7-wspc-so-wspc-16-wspc-.30-wspc-large-wspc-jedec-wspc-ms-013_a7y7-wspc-u738ba6_vers2_sdm_signed.pdf md_y7-wspc-so-wspc-16-wspc-.30-wspc-large-wspc-jedec-wspc-ms-013_a7y7-wspc-u738ba6_vers2.xml |
| L4971D013TR | SO-16W | Industrial | Ecopack1 | md_y7-wspc-so-wspc-16-wspc-.30-wspc-large-wspc-jedec-wspc-ms-013_a7y7-wspc-u738ba6_vers2_sdm_signed.pdf md_y7-wspc-so-wspc-16-wspc-.30-wspc-large-wspc-jedec-wspc-ms-013_a7y7-wspc-u738ba6_vers2.xml |
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