TPS61254 - 具有电流限制和旁路的小型升压转换器。 4.5V 输出电压

TPS61254是TI德州仪器公司的一款转换器（集成开关）产品，TPS61254是具有电流限制和旁路的小型升压转换器。 4.5V 输出电压，本站介绍了TPS61254的封装应用图解、特点和优点、功能等，并给出了与TPS61254相关的TI元器件型号供参考。

TPS61254 - 具有电流限制和旁路的小型升压转换器。 4.5V 输出电压 - 转换器（集成开关） - DC/DC开关稳压器 - 德州仪器

产品特性

93% Efficiency at 3.5-MHz Operation
21-µA Quiescent Current in Standby Mode
37-µA Quiescent Current in Normal Operation
Wide VIN Range From 2.3 V to 5.5 V
VIN ≥ VOUT Operation
IOUT ≥ 800 mA at VOUT = 4.5 V, VIN ≥ 2.65 V
IOUT ≥ 1000 mA at VOUT = 5.0 V, VIN ≥ 3.3 V
IOUT ≥ 1500 mA (Peak) at VOUT = 5.0 V, VIN ≥ 3.3 V
±2% Total DC Voltage Accuracy
Light-Load PFM Mode
Selectable Standby Mode or True Load Disconnect During Shutdown
Thermal Shutdown and Overload Protection
Only Three Surface-Mount External Components Required
Total Solution Size < 25 mm2
9-Pin NanoFreeTM (CSP) Packaging

产品应用

Cell Phones, Smart Phones
Mono and Stereo APA Applications
USB Charging Ports (5V)

产品说明

The TPS6125x device provides a power supply solution for battery-powered portable applications. Intended for low-power applications, the TPS6125x supports up to 800-mA load current from a battery discharged as low as 2.65V and allows the use of low cost chip inductor and capacitors.

With a wide input voltage range of 2.3 V to 5.5 V, the device supports applications powered by Li-Ion batteries with extended voltage range. Different fixed voltage output versions are available from 3.15 V to 5.0 V.

The TPS6125x operates at a regulated 3.5-MHz switching frequency and enters power-save mode operation at light load currents to maintain high efficiency over the entire load current range. The PFM mode extends the battery life by reducing the quiescent current to 37 μA (typ) during light load operation.

In addition, the TPS6125x device can also maintain its output biased at the input voltage level. In this mode, the synchronous rectifier is current limited allowing external load (e.g. audio amplifier) to be powered with a restricted supply. In this mode, the quiescent current is reduced to 21 µA. During shutdown, the load is completely disconnected from the battery. Input current in shutdown mode is less than 1 µA (typ), which maximizes battery life.

The TPS6125x offers a very small solution size due to minimum amount of external components. It allows the use of small inductors and input capacitors to achieve a small solution size.

产品器件信息

PART NUMBER	PACKAGE	BODY SIZE (NOM)
TPS6125x	DSBGA (9)	1.206 mm × 1.306 mm

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