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
技术特性
- UP TO 1.5A STEP DOWN CONVERTER
- OPERATING INPUT VOLTAGE FROM 8V TO 55V
- PRECISE 3.3V (±1%) INTERNAL REFERENCE VOLTAGE
- OUTPUT VOLTAGE ADJUSTABLE FROM 3.3V TO 50V
- SWITCHING FREQUENCY ADJUSTABLE UP TO 300KHz
- VOLTAGE FEEDFORWARD
- ZERO LOAD CURRENT OPERATION
- INTERNAL CURRENT LIMITING (PULSE-BY PULSE AND HICCUP MODE)
- INHIBIT FOR ZERO CURRENT CONSUMPTION
- PROTECTION AGAINST FEEDBACK DISCONNECTION
- THERMAL SHUTDOWN
- SOFT START FUNCTION
|
功能框图
 |
L4971 订购信息
| 订购型号 |
产品状态 |
美金价格 |
数量 |
封装 |
包装形式 |
温度范围 |
材料声明 |
| L4971 |
Active |
|
1000 |
DIP-8 |
Tube |
|
|
| L4971D013TR |
Active |
|
1000 |
SO-16W |
Tape And Reel |
|
|
| L4971D |
Active |
|
1000 |
SO-16W |
Tube |
|
|
DATASHEET
| 描述 |
版本 |
大小 |
| L4971 : 1.5A step down switching regulator |
11 |
572KB |
APPLICATION NOTES
| 描述 |
版本 |
大小 |
| AN1941: Low Voltage LED Driver Using L6920D, L4971 and L6902D |
1 |
500KB |
| AN937: Designing with L4971, 1.5 A high efficiency DC-DC converter |
15 |
1009KB |
DESIGN NOTES
| 描述 |
版本 |
大小 |
| DN0011: ST1S03 alternative topology: Using a buck in a negative buck-boost configuration |
1.0 |
360KB |
SCHEMATIC PACKS
| 描述 |
版本 |
大小 |
| Board Schematic |
1.0 |
8KB |
BOARDS AND TOOLS
| 型号 |
描述 |
| EVAL4971 |
L4971 1.5 A Step Down Switching Regulator Evaluation Board |
