TPS61281DYFFR集成電路（IC）的穩(wěn)壓器-DC-DC開關(guān)穩(wěn)壓器規(guī)格書PDF中文資料

TPS61281DYFFR屬于集成電路（IC）的穩(wěn)壓器-DC-DC開關(guān)穩(wěn)壓器。由德州儀器制造生產(chǎn)的TPS61281DYFFR穩(wěn)壓器 - DC-DC 開關(guān)穩(wěn)壓器DC-DC 開關(guān)穩(wěn)壓器 PMIC（電源管理集成電路）產(chǎn)品族中的產(chǎn)品是元器件級設(shè)備，用于需要穩(wěn)定 DC 輸入電壓和/或?qū)⑵滢D(zhuǎn)換為不同幅度的輸出電壓的應(yīng)用。這些器件與稱為“控制器”PMIC 的類似產(chǎn)品的區(qū)別在于集成了主開關(guān)元件，設(shè)備提供的電力會通過該元件。

1 Features

? 95 efficiency at 2.3 MHz operation

? 3-μA quiescent current in low IQ pass-through

mode

? Wide VIN range from 2.3 V To 4.8 V

? IOUT ≥ 4-A (Peak) at VOUT = 3.35 V, VIN ≥ 2.65 V

? Integrated pass-through mode (35 mΩ)

? Programmable valley inductor current limit and

output voltage

? True pass-through mode during shutdown

? Best-in-class line and load transient

? Low-ripple light-load PFM mode

? In-Situ customization with On-Chip E2PROM (write

protection)

? Two interface options:

– I2C compatible I/F up to 3.4 Mbps

(TPS61280D/E)

– Simple I/O logic control interface

? Thermal shutdown and overload protection

? Total solution size < 20 mm2, sub 1-mm profile

2 Applications

? Single-cell Ni-Rich, Si-Anode, Li-Ion, LiFePO4

smart-phones or tablet PCs

? 2.5G, 3G, 4G mini-module data cards

? Current limited applications featuring high peak

power loads

3 Description

The TPS6128xD/E device provides a power supply

solution for products powered by either by a Li-Ion,

Nickel-Rich, Silicon Anode, Li-Ion or LiFePO4 battery.

The voltage range is optimized for single-cell portable

applications like in smart-phones or tablet PCs.

Used as a high-power pre-regulator, the

TPS6128xD/E extends the battery run-time and

overcomes input current- and voltage limitations of the

powered system.

While in shutdown, the TPS6128xD/E operates in

a true pass-through mode with only 3-μA quiescent

consumption for longest battery shelf life.

During operation, when the battery is at a good stateof-

charge, a low-ohmic, high-efficient integrated passthrough

path connects the battery to the powered

system.

If the battery gets to a lower state of charge and

its voltage becomes lower than the desired minimum

system voltage, the device seamlessly transits into

boost mode to uses the full battery capacity.