TPS6521815

• Three Adjustable Step-Down Converters With Integrated Switching FETs (DCDC1, DCDC2, and DCDC3):
  • Up to 1.8-A output current
  • VIN Range From 2.7 V to 5.5 V
  • Adjustable Output Voltage Range 0.85 V to 1.675 V (DCDC1 and DCDC2)
  • Adjustable Output Voltage Range 0.9 V to 3.4 V (DCDC3)
  • Power Save Mode at Light Load Current
  • 100% Duty Cycle for Lowest Dropout
  • Active Output-Discharge When Disabled
• One Adjustable Buck-Boost Converter With Integrated Switching FETs (DCDC4):
  • Up to 1.6-A output current
  • VIN Range From 2.7 V to 5.5 V
  • Adjustable Output Voltage Range 1.175 V to 3.4 V
  • Active Output-Discharge When Disabled
• Two Low-Quiescent Current, High Efficiency Step-Down Converters for Battery Backup Domain (DCDC5, DCDC6)
  • DCDC5: 1-V Output
  • DCDC6: 1.8-V Output
  • VIN Range from 2.2 V to 5.5 V
  • Supplied From System Power or Coin-Cell Backup Battery
• Adjustable General-Purpose LDO (LDO1)
  • LDO1: 1.8-V Default up to 400 mA
  • VIN Range From 1.8 V to 5.5 V
  • Adjustable Output Voltage Range From 0.9 V to 3.4 V
  • Active Output-Discharge When Disabled
• Low-Voltage Load Switch (LS1) With 350-mA Current Limit
  • VIN Range From 1.2 V to 3.6 V
  • 110-mΩ (Max) Switch Impedance at 1.35 V
• 5-V Load Switch (LS2) With 100-mA or 500-mA Selectable Current Limit
  • VIN Range From 3 V to 5.5 V
  • 500-mΩ (Max) Switch Impedance at 5 V
• High-Voltage Load Switch (LS3) With 100-mA or 500-mA Selectable Current Limit
  • VIN Range From 1.8 V to 10 V
  • 500-mΩ (Max) Switch Impedance
• Supervisor With Built-in Supervisor Function Monitors
  • DCDC1, DCDC2 ±4% Tolerance
  • DCDC3, DCDC4 ±5% Tolerance
  • LDO1 ±5% Tolerance
• Protection, Diagnostics, and Control:
  • Undervoltage Lockout (UVLO)
  • Always-on Push-Button Monitor
  • Overtemperature Warning and Shutdown
  • Separate Power-Good Output for Backup and Main Supplies
  • I²C Interface (Address 0x24) (See Timing Requirements for I²C Operation at 400 kHz)

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The TPS6521815 is a single chip, power-management IC (PMIC) that is user-programmable to power a variety of SoCs and FPGAs. The device is characterized across a –40°C to +105°C temperature range, making it suitable for various industrial applications.

Three hysteretic step-down converters are targeted at providing power for the processor core, MPU, and DDRx memory. The default output voltages for each converter can be adjusted through the I²C interface. DCDC1 and DCDC2 feature dynamic voltage scaling to provide power at all operating points of the processor. DCDC1 and DCDC2 also have programmable slew rates to help protect processor components. DCDC3 remains powered while the processor is in sleep mode to maintain power to DDRx memory. Backup power provides two step-down converters for the tamper, RTC, or both domains of the processor if system power fails or is disabled. If both system power and coin-cell battery are connected to the PMIC, power is not drawn from the coin-cell battery. A separate power good signal monitors the backup converters. A battery backup monitor determines the power level of the coin-cell battery.