LM3481-Q1 用于开关稳压器的 48V 宽输入电压低侧 N 通道控制器 | 德州仪器 TI.com.cn

LM3481-Q1 (正在供货)

用于开关稳压器的 48V 宽输入电压低侧 N 通道控制器

用于开关稳压器的 48V 宽输入电压低侧 N 通道控制器 - LM3481-Q1
 

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描述

The LM3481 device is a versatile Low-Side N-FET high-performance controller for switching regulators. The device is suitable for use in topologies requiring a low-side FET, such as boost, flyback, SEPIC, and so on. The LM3481 device can be operated at extremely high switching frequencies to reduce the overall solution size. The switching frequency of the LM3481 device can be adjusted to any value between 100kHz and 1MHz by using a single external resistor or by synchronizing it to an external clock. Current mode control provides superior bandwidth and transient response in addition to cycle-by-cycle current limiting. Current limit can be programmed with a single external resistor.

The LM3481 device has built-in protection features such as thermal shutdown, short-circuit protection and overvoltage protection. Power-saving shutdown mode reduces the total supply current to 5 µA and allows power supply sequencing. Internal soft-start limits the inrush current at start-up.

特性

  • LM3481QMM are Automotive-Grade Products
    That are AEC-Q100 Grade 1 Qualified (–40°C to
    +125°C Operating Junction Temperature)
  • 10-Lead VSSOP Package
  • Internal Push-Pull Driver With 1-A Peak Current
    Capability
  • Current Limit and Thermal Shutdown
  • Frequency Compensation Optimized With a Capacitor
    and a Resistor
  • Internal Softstart
  • Current Mode Operation
  • Adjustable Undervoltage Lockout With Hysteresis
  • Pulse Skipping at Light Loads
  • Key Specifications
    • Wide Supply Voltage Range of 2.97 V to 48 V
    • 100-kHz to 1-MHz Adjustable and Synchronizable
      Clock Frequency
    • ±1.5% (Over Temperature) Internal
      Reference
    • 10-µA Shutdown Current (Over Temperature)

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参数 与其它产品相比 升压控制器 (外部开关)

 
Vin (Min) (V)
Vin (Max) (V)
Vout (Min) (V)
Vout (Max) (V)
Switch Current Limit (Typ) (A)
Regulated Outputs (#)
Switching Frequency (Min) (kHz)
Switching Frequency (Max) (kHz)
Iq (Typ) (mA)
Features
Iout (Max) (A)
Duty Cycle (Max) (%)
Operating Temperature Range (C)
Rating
Package Group
LM3481-Q1 LM25122-Q1 LM3478 LM3488 LM5022-Q1 LM5122-Q1 LM5150-Q1 LM51501-Q1 TPS40210-Q1 TPS40211-Q1
2.97     3     2.97     2.97     3     3     1.5     1.5     4.5     4.5    
48     42     40     40     60     65     42     42     52     52    
1.275     3     1.26     1.26     1.25     3     6.8     6.0     6.4     6.4    
500     50     500     500     300     100     10.5     11.5     300     60    
10     20     10     10     10     20     15     15     6     6    
1     1     1     1     1     1     1     1     1     1    
100     50     100     100     170     50     220     220     35     35    
1000     600     1000     1000     2200     1000     2300     2300     1000     1000    
3.7     4     2.7     2.7     3.5     4     0.015     0.015     0.53     0.53    
Adjustable Current Limit
Enable
Frequency Synchronization
Light Load Efficiency
Pre-Bias Start-Up
UVLO Adjustable    
Enable
Frequency Synchronization
Phase Interleaving
Synchronous Rectification    
Adjustable Current Limit
Enable
Frequency Synchronization
Light Load Efficiency
Pre-Bias Start-Up    
Adjustable Current Limit
Enable
Frequency Synchronization
Light Load Efficiency
Pre-Bias Start-Up    
Enable
Frequency Synchronization
UVLO Adjustable    
Enable
Frequency Synchronization
Phase Interleaving
Synchronous Rectification
UVLO Adjustable    
Adjustable Current Limit
Enable
Frequency Synchronization
Light Load Efficiency    
Adjustable Current Limit
Enable
Frequency Synchronization
Light Load Efficiency    
Enable
Frequency Synchronization    
Enable
Frequency Synchronization    
10     20     10     10     10     20     15     15     6     6    
85     100     100     100     90     100     87     87     95     95    
-40 to 125     -40 to 125     -40 to 125     -40 to 125     -40 to 125     -40 to 125     -40 to 150     -40 to 125     -40 to 125     -40 to 125    
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