DFE252012C中文资料德州仪器数据手册PDF规格书

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.