--- 產品詳情 ---
Vin (Min) (V) | 8 |
Vin (Max) (V) | 40 |
Vout (Min) (V) | 2.5 |
Vout (Max) (V) | 37 |
Iout (Max) (A) | 1.25 |
Iq (Typ) (uA) | 570 |
Switching frequency (Min) (kHz) | 50 |
Switching frequency (Max) (kHz) | 1300 |
Features | Enable, Over Current Protection |
Rating | Catalog |
Regulated outputs (#) | 1 |
Control mode | Constant on-time (COT) |
Duty cycle (Max) (%) | 97 |
- Input Voltage Range: 8V to 40V
- Integrated N-Channel Buck Switch
- Valley Current Limit Varies with VIN and VOUT to Reduce Excessive Inductor Current
- On-time is Reduced when in Current Limit
- Integrated Start-Up Regulator
- No Loop Compensation Required
- Ultra-Fast Transient Response
- Maximum Switching Frequency: 1.3 MHz
- Operating Frequency Remains Nearly Constant with Load Current and Input Voltage Variations
- Programmable Soft-Start
- Precision Internal Reference
- Adjustable Output Voltage
- Thermal Shutdown
All trademarks are the property of their respective owners.
The LM34914 Step-Down Switching Regulator features all the functions needed to implement a low cost, efficient, buck bias regulator capable of supplying at least 1.25A to the load. To reduce excessive switch current due to the possibility of a saturating inductor the valley current limit threshold changes with input and output voltages, and the on-time is reduced when current limit is detected. This buck regulator contains a 44V N-Channel Buck Switch, and is available in the thermally enhanced 3 mm x 3 mm WSON-10 package. The feedback regulation scheme requires no loop compensation, results in fast load transient response, and simplifies circuit implementation. The operating frequency remains constant with line and load variations due to the inverse relationship between the input voltage and the on-time. The valley current limit results in a smooth transition from constant voltage to constant current mode when current limit is detected, reducing the frequency and output voltage, without the use of foldback. Additional features include: VCC under-voltage lock-out, thermal shutdown, gate drive under-voltage lock-out, and maximum duty cycle limit.
為你推薦
-
TI數字多路復用器和編碼器SN54HC1512022-12-23 15:12
-
TI數字多路復用器和編碼器SN54LS1532022-12-23 15:12
-
TI數字多路復用器和編碼器CD54HC1472022-12-23 15:12
-
TI數字多路復用器和編碼器CY74FCT2257T2022-12-23 15:12
-
TI數字多路復用器和編碼器SN74LVC257A2022-12-23 15:12
-
TI數字多路復用器和編碼器SN74LVC157A2022-12-23 15:12
-
TI數字多路復用器和編碼器SN74ALS258A2022-12-23 15:12
-
TI數字多路復用器和編碼器SN74ALS257A2022-12-23 15:12
-
TI數字多路復用器和編碼器SN74ALS157A2022-12-23 15:12
-
TI數字多路復用器和編碼器SN74AHCT1582022-12-23 15:12
-
電動汽車直流快充方案設計【含參考設計】2023-08-03 08:08
-
Buck電路的原理及器件選型指南2023-07-31 22:28
-
100W USB PD 3.0電源2023-07-31 22:27
-
基于STM32的300W無刷直流電機驅動方案2023-07-06 10:02
-
上新啦!開發板僅需9.9元!2023-06-21 17:43
-
參考設計 | 2KW AC/DC數字電源方案2023-06-21 17:43
-
千萬不能小瞧的PCB半孔板2023-06-21 17:34