L5973D Up to 2 A step down switching regulator
The L5973D is a step down monolithic power switching regulator with a minimum switch current limit of 2.5 A so it is able to deliver more than 2 A DC current to the load depending on the application conditions.
The output voltage can be set from 1.235 V to 35 V. The high current level is also achieved thanks to an SO8 package with exposed frame, that allows to reduce the Rth(j-amb) down to approximately 40 �C/W.
The device uses an internal P-channel D-MOS transistor (with a typical Rdson of 250 mOhm) as switching element to minimize the size of the external components.
An internal oscillator fixes the switching frequency at 250 kHz.
Having a minimum input voltage of 4 V only, it is particularly suitable for 5 V bus, available in all computer related applications. Pulse by pulse current limit with the internal frequency modulation offers an effective constant current short circuit protection
技术特性
- 2.5 A internal switch
- Operating input voltage from 4 V to 36 V
- 3.3 V / (�2%) reference voltage
- Output voltage adjustable from 1.235 V to 35 V
- Low dropout operation: 100 % duty cycle
- 250 kHz internally fixed frequency
- Voltage feedforward
- Zero load current operation
- Internal current limiting
- Inhibit for zero current consumption
- Synchronization
- Protection against feedback disconnection
- Thermal shutdown
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应用领域
- Consumer: STB, DVD, TV, VCR, car radio,
LCD monitors
- Networking: XDSL, modems, DC-DC modules
- Computer: printers, audio/graphic cards,
optical storage, hard disk drive
- Industrial: changers, car battery, DC-DC
converters
电路原理图
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L5973D 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 |
| L5973D013TR |
Active |
|
1000 |
SO-8 |
Tape And Reel |
|
|
| L5973D |
Active |
|
1000 |
SO-8 |
Tube |
|
|
DATASHEET
| 描述 |
版本 |
大小 |
| L5973D : DS2671: 2.5 A switch step down switching regulator |
16 |
293KB |
DATA BRIEF
| 描述 |
版本 |
大小 |
| DB0520: Electronic fiscal cash register |
2 |
182KB |
APPLICATION NOTES
| 描述 |
版本 |
大小 |
| AN2259: High intensity LED driver using the L5970D/L5973D |
1 |
331KB |
| AN1518: Designing with the 2.5 A DC-DC converter L5973D |
4 |
795KB |
| AN1891: Application ideas: driving LEDs using L497x, L597x, L692x DC-DC converters families |
2 |
301KB |
DESIGN NOTES
| 描述 |
版本 |
大小 |
| DN0011: ST1S03 alternative topology: Using a buck in a negative buck-boost configuration |
1.0 |
360KB |
USER MANUALS
| 描述 |
版本 |
大小 |
| UM0432: Low voltage motor control demonstration board based on ST7MC MCU |
2 |
906KB |
SCHEMATIC PACKS
| 描述 |
版本 |
大小 |
| Board Schematic |
1.0 |
8KB |
