TPS65276V is a monolithic dual synchronous buck converter with wide 4.5V to 18V operating
input voltage range that encompassed most intermediate bus voltage operating off 5-, 9-, 12- or
15-V power bus or battery. The converter with constant frequency peak current mode control is
designed to simplify its application while giving the designers options to optimize their usage
according to the target applications.
Each buck converter in TPS65276V has external feedback resistors that can be used for
setting the initial start up voltage. The feedback voltage reference for this start-up option is
0.6 V. Once the VID DAC is updated via the I2C, the buck converter
switches feedback resistors from external to internal. The output voltage in each buck can be
programmable from 0.68 V to 1.95 V in 10-mV steps with I2C Controlled
Each buck converter in TPS65276V can also be I2C controlled
for enabling/disabling output voltage, setting the pulse skipping mode and reading the power good
status and die temperature warning.
The switching frequency of the converters can be set from 200 kHz to 1.6 MHz with an
external resistor. Two converters have clock signal with 180° out-of-phase.
TPS65276V features dedicated enable pin when I2C interface is
not used. Independent soft-start pin provides flexibility in power up programmability. Constant
frequency peak current mode control simplifies the compensation and provides fast transient
response. Cycle-by-cycle over current protection and hiccup mode operation limit MOSFET power
dissipation in short circuit or over loading fault conditions. Low side reverse over current
protection also prevents excessive sinking current from damaging the converter.
TPS65273V also features a light load pulse skipping mode (PSM) that can be controlled by
I2C or MODE pin configuration. The PSM mode allows a power loss
reduction on the input power supplied to the system to achieve high efficiency at light
The TPS65273V is available in a 32-pin thermally enhanced HTSSOP (DAP) package and 36-pin
QFN 6-mm × 6-mm (RHH) package.
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