Dual-rail charge pump for 0.9 V to 1.8 V input rails
The TPS60302DGS is a charge-pump step-up converter generating two fixed outputs from a single input rail that can drop as low as 0.9 V and max out at 1.8 V. One output tracks the input voltage ratiometrically (2×Vin), while the other holds a regulated 3.3 V rail — meaning a single device powers both a VDD tracking supply and a fixed 3.3 V bus from a battery that sags below 1 V. Output current is split: 40 mA on the ratiometric channel and 20 mA on the 3.3 V channel. Operating temperature spans -40°C to 125°C junction, covering automotive cabin and under-hood sensor modules that see high ambient heat. The device does not use synchronous rectification, so the Schottky diode in the charge-pump path must be selected for the load current and switching frequency.
Package and board-fit note
Supplied in tube, the 10-VSSOP package has a 0.50 mm lead pitch and a 3.00 mm body width. The exposed die-attach pad is not present — this is a non-thermal-pad MSOP, so thermal dissipation relies on the copper pad area under the package on the PCB top layer. Surface-mount assembly with standard reflow profiles for MSOP-10. The low pin count means fan-out is possible on a two-layer board, but the 0.50 mm pitch still benefits from a solder-mask-defined pad for consistent solder-joint volume.