- 制造厂商：TI
- 产品类别：电源管理
- 技术类目：直流/直流开关稳压器 - 降压稳压器
- 功能描述：80V、600mA 恒定导通时间降压开关稳压器
- 点击这里打开及下载LM34923的技术文档资料
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The LM34923 Step Down Switching Regulator features all of the functions needed to implement a low cost, efficient Buck bias regulator. This high voltage regulator contains an 80V N-Channel MOSFET Switch and a startup regulator. The device is easy to implement and is provided in an 10-pin VSSOP package. The regulator’s control scheme uses an on-time inversely proportional to VIN. This feature results in the operating frequency remaining relatively constant with line and load variations. The control scheme requires no loop compensation, resulting in fast transient response. An intelligent current limit is implemented with a forced off-time which is inversely proportional to VOUT. This scheme ensures short circuit control while providing minimum foldback. Other features include: Thermal Shutdown, VCC Under Voltage Lock-out, Max Duty Cycle Limiter, a Pre-charge Switch, and a programmable Under Voltage Detector with a status flag output.
- Operating Input Voltage Range: 6V to 75V
- Integrated 80V, N-Channel Buck Switch
- Internal Start-up Regulator
- No Loop Compensation Required
- Ultra-Fast Transient Response
- Operating Frequency Remains Constant with Line and Load Variations
- Adjustable Output voltage From 2.5V
- Precision Internal Reference, ±2.5%
- Intelligent Current Limit Reduces Foldback
- Programmable Input UV Detector with Status Flag Output
- Pre-charge Switch Enables Bootstrap Gate Drive with No Load
- Thermal Shutdown
- 10-Pin VSSOP Package
- Vin (Min) (V)
- 6
- Vin (Max) (V)
- 75
- Vout (Min) (V)
- 2.5
- Vout (Max) (V)
- 75
- Iout (Max) (A)
- 0.65
- Iq (Typ) (uA)
- 1000
- Switching frequency (Min) (kHz)
- 50
- Switching frequency (Max) (kHz)
- 800
- Features
- Over Current Protection, Power Good
- Rating
- Catalog
- Regulated outputs (#)
- 1
- Control mode
- Constant on-time (COT)
- Duty cycle (Max) (%)
- 97
LM34923的完整型号有：LM34923MM/NOPB、LM34923MMX/NOPB，以下是这些产品的关键参数及官网采购报价：
LM34923MM/NOPB，工作温度：-40 to 125，封装：VSSOP (DGS)-10，包装数量MPQ：1000个，MSL 等级/回流焊峰值温度：Level-1-260C-UNLIM，引脚镀层/焊球材料：SN，TI官网LM34923MM/NOPB的批量USD价格：1.122（1000+）
LM34923MMX/NOPB，工作温度：-40 to 125，封装：VSSOP (DGS)-10，包装数量MPQ：3500个，MSL 等级/回流焊峰值温度：Level-1-260C-UNLIM，引脚镀层/焊球材料：SN，TI官网LM34923MMX/NOPB的批量USD价格：.935（1000+）
LM34923EVAL — 用于 LM34923 的评估板
The LM34923 EVAL evaluation board provides the design engineer with a fully functional buck regulator, employing the constant on-time (COT) operating principle. This evaluation board provides a 5V output over an input range of 6V to 75V. The circuit delivers load currents to 500 mA, with current (...)
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