GENERAL DEscriptION

The SGM61020 is a high efficiency synchronous Buck DC/DC converter with 2A output current capability and adjustable output voltage. The input supply voltage is in the range of 2.5V to 5.5V. Using adaptive off-time peak current control, the efficiency of this device is higher than 80% for loads over 1mA and reaches 95% in the moderate load ranges (5V to 3.3V).

This device operates with a 1.5MHz pulse width modulation (PWM) mode for moderate or heavy loads. But at light loads, pulse skip modulation is used for power-save mode (PSM). The PSM operating current is very low, typically 42μA, which is well suitable for battery-powered applications to increase standby time. Despite such low current, the transient response to large load variations is excellent. The device shutdown current is typically 0.03μA.

The SGM61020 provides an adjustable output voltage by an external resistor divider. The device is capable for low dropout operation with  duty cycle. Some other features include internal soft-start for limiting startup inrush current, over-current and thermal shutdown protections, enable input and power good output (for SGM61020P version only).

The SGM61020 is available in Green SOT-23-5 and SOT-563-6 packages.

FEATURES

• 2.5V to 5.5V Input Voltage Range

• Adjustable Output Voltage from 0.6V to VIN

• Up to 95% Efficiency

• Low RDSON MOSFET Switches (100mΩ/55mΩ)

• Power-Save Mode for Light Load Efficiency

• 42μA (TYP) Operating Current

• Duty Cycle Capability for Low Dropout

• 1.5MHz PWM Switching Frequency

• Power Good Output (SGM61020P Only)

• Over-Current Protection

• Thermal Shutdown Protection

• Input Under-Voltage Lockout (UVLO) Protection

• Small Packaging:

  SGM61020: Available in Green SOT-23-5 and SOT-563-6 Packages

  SGM61020P: Available in a Green SOT-563-6 Package

APPLICATIONS

Battery-Powered Applications

Point-of-Load

Processor Power Supplies

Hard Disk Drives (HDD)/Solid State Drives (SSD)