TPS61240 5V、400mA、4MHz 升压 DC/DC 转换器 | 德州仪器 TI.com.cn

TPS61240 (正在供货)

5V、400mA、4MHz 升压 DC/DC 转换器

5V、400mA、4MHz 升压 DC/DC 转换器 - TPS61240
数据表
 

描述

The TPS6124x device is a highly efficient synchronous step-up DC-DC converter optimized for products powered by either a three-cell alkaline, NiCd or NiMH, or one-cell Li-Ion or Li-Polymer battery. The TPS6124x supports output currents up to 450 mA. The TPS61240 has an input valley current limit of 500 mA, and the TPS61241 has an input valley current of 600 mA.

With an input voltage range of 2.3 V to 5.5 V, the device supports batteries with extended voltage range and are ideal to power portable applications like mobile phones and other portable equipment. The TPS6124x boost converter is based on a quasi-constant on-time valley current mode control scheme.

The TPS6124x presents a high impedance at the VOUT pin when shut down. This allows for use in applications that require the regulated output bus to be driven by another supply while the TPS6124x is shut down.

During light loads the device will automatically pulse skip allowing maximum efficiency at lowest quiescent currents. In the shutdown mode, the current consumption is reduced to less than 1 µA.

TPS6124x allows the use of small inductors and capacitors to achieve a small solution size. During shutdown, the load is completely disconnected from the battery. The TPS6124x is available in a 6-pin DSBGA and 2-mm × 2-mm WSON package.

特性

  • Efficiency > 90% at Nominal Operating Conditions
  • Total DC Output Voltage Accuracy 5.0 V±2%
  • Typical 30-µA Quiescent Current
  • Best in Class Line and Load Transient
  • Wide VIN Range From 2.3 V to 5.5 V
  • Output Current up to 450 mA
  • Automatic PFM/PWM Mode Transition
  • Low Ripple Power Save Mode for Improved
    Efficiency at Light Loads
  • Internal Softstart, 250-μs Typical Start-Up Time
  • 3.5-MHz Typical Operating Frequency
  • Load Disconnect During Shutdown
  • Current Overload and Thermal Shutdown
    Protection
  • Three Surface-Mount External Components
    Required (One MLCC Inductor, Two Ceramic
    Capacitors)
  • Total Solution Size <13 mm2
  • Available in a 6-Pin DSBGA and 2-mm × 2-mm
    WSON Package

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参数 与其它产品相比 升压转换器 (集成开关)

 
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
Duty Cycle (Max) (%)
Operating Temperature Range (C)
Rating
Package Group
TPS61240 TPS61241
2.3     2.3    
5.5     5.5    
5     5    
5     5    
0.6     0.7    
1     1    
3500     3500    
3500     3500    
0.03     0.03    
Enable
Light Load Efficiency
Load Disconnect    
Enable
Light Load Efficiency
Load Disconnect    
100     100    
-40 to 85     -40 to 85    
Catalog     Catalog    
DSBGA
WSON    
DSBGA    

其它合格版本 TPS61240

版本 器件型号 定义
汽车电子 TPS61240-Q1 Q100 适用于追求零缺陷的高可靠性汽车电子应用的器件
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WEBENCH® Designer TPS61240

  最小   最大 范围
输入电压  V 2.3 to 4.9V
输出电压  V 5 to 5V
输出电流  A ≤ 0.65A
环境温度  °C -40 to 85°C


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