SGM61020.pdf
No.11700
? 2.5V to 5.5V Input Voltage Range
? Adjustable Output Voltage from 0.6V to VIN
? Up to 95% Efficiency
? Low RDSON Switches (102mΩ/57mΩ)
? Power-Save Mode for Light Load Efficiency
? 42μA (TYP) Operating Quiescent Current
? 100% Duty Cycle for Low Dropout Operation
? 1.5MHz PWM Switching Frequency
? Power Good Output (SGM61020P Only)
? Over-Current Protection
? Thermal Shutdown Protection
? Input Under-Voltage Lockout (UVLO) Protection
? -40℃ to +125℃ Operating Temperature Range
? Small Packaging:
SGM61020: Available in Green SOT-23-5 and
SOT-563-6 Packages
SGM61020P: Available in a Green SOT-563-6
Package
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 quasi-fixed 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 quiescent current is very low, typically 42μA, which is well suitable for battery powered applications to increase standby time. Despite such low quiescent current, the transient response to large load variations is excellent. The device shutdown current is typically 0.02μA.
The SGM61020 provides an adjustable output voltage by an external resistor divider. The device is capable for low dropout operation with 100% 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 P version only).
The SGM61020 is available in Green SOT-23-5 and SOT-563-6 packages and can operate in the -40℃ to +125℃ ambient temperature range.
