1 Features

Three Adjustable Step-Down Converters With Integrated Switching FETs (DCDC1, DCDC2, and DCDC3):
- DCDC1: 1.1-V Default, up to 1.8 A
- DCDC2: 1.1-V Default, up to 1.8 A
- DCDC3: 1.2-V Default, up to 1.8 A
- 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):
- DCDC4: 3.3-V Default, up to 1.6 A
- VIN Range from 2.7 V to 5.5 V
- Adjustable Output Voltage Range from 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 4 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)