The TPS61001DGSR: That dual-mode architecture lets a single device handle two different supply rails: one clean low-noise rail from the LDO and one efficient higher-current rail from the switcher, which is exactly what you need when a mixed-signal board has an analog front-end that cannot tolerate switcher ripple and a digital core that needs the efficiency of a switching converter. This part sits in the Power Management (PMIC / Gate Driver) category, so it is designed for applications that combine regulation and sequencing — think battery-powered instruments, multi-rail sensor modules, or portable RF gear where the analog rail must stay quiet while the digital rail delivers the bulk current.
That gives procurement a stable planning horizon — no LTB window to chase, no forced redesign for a drop-in replacement. The ROHS3 Compliant status covers the latest EU substance restrictions without exemptions, so it ships into RoHS-regulated markets without paperwork overhead.
Design-in considerations for the linear-switching regulator
Because the TPS61001DGSR combines a linear and a switching regulator, the board layout must isolate the switcher's inductor and output capacitor loop from the LDO's quiet output. A ground plane split under the IC with a single-point return for the switcher's high-di/dt path keeps the LDO's PSRR from being undermined by layout coupling.