The TPSM82843 is a high-frequency, synchronous step-down converter with integrated inductor and ultra-low quiescent current of typically 275nA. The device operates with a 4.7μF input capacitor and 10μF output capacitor over the entire recommended operation range to provide very small design size.

Using TI's DCS-Control topology, the device extends the high efficiency operation area down to microamperes of load current during power saving in Pulse Frequency Modulation (PFM) mode. TI's DCS-Control (Direct Control with Seamless Transition into PFM mode) is an advanced regulation topology that combines the advantages of hysteretic and voltage mode control. Characteristics of DCS-Control are excellent AC load regulation and transient response, low output ripple voltage, and a seamless transition between PFM and Pulse Width Modulation (PWM) mode operation. DCS-Control includes an AC loop that senses the output voltage (VOS pin) and directly feeds the information to a fast comparator stage. This comparator sets the switching frequency, which is constant for steady state operating conditions, and provides immediate response to dynamic load changes. To achieve accurate DC load regulation, a voltage feedback loop is used. The internally compensated regulation network achieves fast and stable operation with small external components and low-ESR capacitors.