The TPS65262-2 is a monolithic triple synchronous step-down (buck) converter with
3-A/1-A/1-A output current. A wide 4.5- to 18-V input supply voltage range encompasses the most
intermediate bus voltage operating off 5-, 9-, 12-, or 15-V power bus. The converter, with constant
frequency peak current mode, is designed to simplify its application while giving designers options
to optimize the system according to targeted applications. The device operates at 600-kHz fixed
switching frequency. The loop compensations for buck 2 and buck3 have been integrated for less
external components. The 180° out-of-phase operation between buck1 and buck2, 3 (buck2 and buck3
run in phase) minimizes the input filter requirements.
The TPS65262-2 operates in pulse skipping mode (PSM) with connecting MODE pin to GND and
operates in force continuous current mode (FCC) with driving MODE pin to high or leaving float. PSM
mode provides high efficiency by reducing switching losses at light load and FCC mode reduces noise
susceptibility and RF interference.
Two low dropout voltage linear regulators (LDO) are also built in TPS65262-2 with input
voltage range 1.3 to 18 V, continuous output current 350 mA/150 mA, independent enable and
adjustable output voltage.
A power-good pin asserts when any output voltages are out of regulation.
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