TPS61240-Q1 - 汽车类 5V、400mA、4MHz 升压 DC/DC 转换器

TPS61240-Q1是TI德州仪器公司的一款转换器（集成开关）产品，TPS61240-Q1是汽车类 5V、400mA、4MHz 升压 DC/DC 转换器，本站介绍了TPS61240-Q1的封装应用图解、特点和优点、功能等，并给出了与TPS61240-Q1相关的TI元器件型号供参考。

TPS61240-Q1 - 汽车类 5V、400mA、4MHz 升压 DC/DC 转换器 - 转换器（集成开关） - DC/DC开关稳压器 - 德州仪器

产品描述

The TPS61240-Q1 device is a high 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 450mA. The TPS61240-Q1 has an input valley current limit of 500mA.

With an input voltage range of 2.3V to 5.5V 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 1µA.

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 2×2 SON package.

产品特性

Qualified for Automotive Applications
Efficiency > 90% at Nominal Operating Conditions
Total DC Output Voltage Accuracy 5.0V±2%
Typical 30 µA Quiescent Current
Best in Class Line and Load Transient
Wide VIN Range From 2.3V to 5.5V
Output current up to 450mA
Automatic PFM/PWM Mode transition
Low Ripple Power Save Mode for Improved Efficiency at Light Loads
Internal Softstart, 250µs typical Start-Up time
3.5MHz 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 2×2-SON Package

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