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).