Step Down Controller 32-Pin VQFN EP T/R

The TPS6505x family of devices are integrated power-management ICs for applications powered by one Li-Ion or Li-Polymer cell, which require multiple power rails. The TPS6505x devices provide two highly efficient, 2.25-MHz step-down converters targeted at providing the core voltage and I/O voltage in a processor-based system. Both step-down converters enter a low-power mode at light load for maximum efficiency across the widest possible range of load currents. For low noise applications, the devices can be forced into fixed-frequency PWM mode by pulling the MODE pin high. The TPS6505x devices also integrate two 400-mA LDO and two 200-mA LDO voltage regulators. Each LDO operates with an input voltage range from 1.5 V to 6.5 V, allowing them to be supplied from one of the step-down converters or directly from the main battery.

Up To 95% Efficiency

Output Current for DC-DC Converters:

• TPS65050, TPS65054: 2 × 0.6 A
• TPS65051, TPS65052 and TPS65056:
  DCDC1 = 1 A; DCDC2 = 0.6 A

Output Voltages for DC-DC Converters

• Externally Adjustable and Fixed Versions
  Available
• Digital Voltage Selection for the DCDC2

V_I Range for DC-DC Converters
From 2.5 V to 6 V

2.25-MHz Fixed-Frequency Operation

Power Save Mode at Light Load Current

180° Out-of-Phase Operation

Output Voltage Accuracy in PWM Mode ±1%

Total Typical 32-µA Quiescent Current for Both
DC-DC Converters

100% Duty Cycle for Lowest Dropout

Two General-Purpose 400-mA, High PSRR LDOs

Two General-Purpose 200-mA, High PSRR LDOs

V_I range for LDOs From 1.5 V to 6.5 V

Digital Voltage Selection for the LDOs