The TPS5300 is a hysteretic synchronous-buck controller, with two on-chip linear regulator controllers,
incorporating dynamic output voltage positioning technology. The TPS5300 provides a precise,
programmable supply voltage to a mobile processor or other processor power applications. A ripple regulator
provides the core voltage, while two linear regulator drivers regulate external NPN power transistors for the
I/O and CLK voltages. A 5-bit voltage identification (VID) DAC allows programming for the ripple regulator
voltage to values between 0.925 V to 1.275 V in 25-mV steps and 1.3 V to 2 V in 50-mV steps. Other voltage
ranges and steps can be easily set. The fast transient response time and active voltage DROOP positioning
reduce the number of output capacitors required to keep the output voltage within tight dynamic voltage
regulation limits. The power saving mode (PSM) allows the user to select a single operating ramp or allows the
controller to automatically switch to lower frequencies at low loads. The high-gain current sense differential
amplifier allows the use of small-value sense resistors that minimize conduction losses.
The TPS5300 includes high-side and low-side gate drivers rated at 2 A typical, that enable efficient operation
at higher frequencies and drive larger or multiple power MOSFETs (such as 50-A output current applications).
An adaptive dead-time circuit minimizes dead-time losses while preventing cross-conduction of high-side and
low-side switches. All three outputs power up together as they track the same user programmable slowstart
voltage. The enable external (ENABLE_EXT) terminal allows the TPS5300 to activate external switching
controllers for additional system power requirements.
The TPS5300 features VCC undervoltage lockout, output overvoltage protection, output undervoltage
protection, and user-programmable overcurrent protection, and is packaged in a small 32-pin TSSOP