DFE252012C中文資料德州儀器數(shù)據(jù)手冊PDF規(guī)格書

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.