XGL4020-472ME中文資料德州儀器數(shù)據(jù)手冊PDF規(guī)格書

1 Features

? AEC-Q100 qualified for automotive applications:

– –40°C to 150°C operating junction temp range

– Level 2 device HBM ESD classification

– Level C4B CDM ESD classification

? Functional Safety-Capable

– Documentation available to aid functional safety

system design

? High-efficiency DCS-Control topology

– Internal compensation

– Seamless PWM/PFM transition

? 4-μA typical low quiescent current

? Output current up to 1 A

? 250-mΩ high side, 85-mΩ low side RDSON

? ±1 output voltage accuracy

? Configurable output voltage options:

– 0.6-V to 5.5-V VFB external divider:

– VSET internal divider:

? 18 options between 0.4 V and 5.5 V

? Flexibility through the MODE/S-CONF pin

– 2.5-MHz or 1.0-MHz switching frequency

– Forced PWM or auto (PFM) power save mode

with dynamic mode change option

– Output discharge on, off

? No external bootstrap capacitor required

? Overcurrent and overtemperature protection

? 100 duty cycle mode

? Precise enable input

? Power-good output

? Pin-to-pin compatible with the TPS629210-Q1,

TPS629206-Q1, and TPS629203-Q1 devices

? 0.5-mm pitch, 8-pin SOT-5X3 package

2 Applications

? Advanced driver assistance systems (ADAS)

? Automotive infotainment and cluster

? Vehicle body electronics and lighting

? Hybrid, electric and powertrain systems

3 Description

The automotive-qualified TPS629211-Q1 device is a

highly efficient, small, and highly flexible synchronous

step-down DC-DC converter that is easy to use. A

wide 3-V to 10-V input voltage range supports a wide

variety of systems powered from either 9-V, 5-V, or

3.3-V supply rails, or single-cell or multi-cell Li-Ion

batteries. The TPS629211-Q1 can be configured to

run at either 2.5 MHz or 1 MHz in a forced PWM

mode or a variable frequency (auto PFM) mode. In

auto PFM mode, the device automatically transitions

to power save mode at light loads to maintain high

efficiency. The low 4-μA typical quiescent current also

provides high efficiency down to the smallest loads.

TI's automatic efficiency enhancement (AEE) mode

holds a high conversion efficiency through the whole

operation range without the need of using different

inductors by automatically adjusting the switching

frequency based on input and output voltages. In

addition to selecting the switching frequency behavior,

the MODE/S-CONF input pin can also be used to

select between different combinations of external and

internal feedback dividers and enabling and disabling

the output voltage discharge capability. In the internal

feedback configuration, a resistor between the FB/

VSET pin and GND can be used to select between

18 different output voltage options (see Table 8-2).