Pololu 5V Step-Down Voltage Regulator D30V30F5, 3.4A Continuous Output
Efficient 80-95% typical efficiency
Low dropout voltage
Integrated safety features
Power-save mode available
The Pololu 5V Step-Down Voltage Regulator D30V30F5, 3.4A Continuous Output is a synchronous buck voltage regulator designed to produce a lower, regulated output voltage from input voltages up to 45 V. These regulators are highly efficient compared to linear voltage regulators, particularly when there is a significant difference between the input and output voltages. The device is capable of supporting continuous output currents ranging from 3 A to 4 A, with the exact current depending on the input and output voltages. The output current availability generally decreases as the input and output voltages increase.
The D30V30F5 model specifically provides a fixed output of 5 V with a 4% accuracy rate. It boasts a typical efficiency of 80% to 95%, which varies based on the input voltage, output voltage, and load. The regulator features a very low dropout voltage and operates at a switching frequency of approximately 700 kHz under heavy loads. It includes a power-save mode to enhance light load efficiency by reducing the switching frequency and maintains a low quiescent current. The enable input comes with a precise cutoff threshold to disconnect the load and transition the regulator into a low-power state with minimal power draw.
Additional features include a "power good" output that signals when the regulator is unable to maintain the output voltage adequately, frequency spread spectrum operation to reduce peak EMI noise, and under-voltage lockout protection. The soft-start feature is designed to limit inrush current and allow the output voltage to ramp up gradually. The regulator also incorporates integrated reverse-voltage protection up to 40 V, over-current and short-circuit protection, and over-temperature shutoff for enhanced safety and durability. Its compact dimensions allow for easy integration into a variety of applications.
The regulator includes six connections: power good (PG), enable (EN), input voltage (VIN), output voltage (VOUT), and two ground (GND) connections. The PG indicator is an open-drain output that requires an external pull-up resistor to function. The EN pin controls the low-power sleep state of the regulator, and the input voltage, VIN, powers the regulator with an effective lower limit determined by the output voltage plus the regulators dropout voltage. VOUT is the regulated output voltage, and the included hardware is compatible with standard prototyping arrangements.
During normal operation, this product can get hot enough to burn you. Take care when handling this product or other components connected to it.
1x Pololu 5V Step-Down Voltage Regulator D30V30F5, 3.4A Continuous Output
1x 6x1 Straight male header strip
1x 5x1 Right-angle male header strip
The regulator is included; one pin of the straight header can optionally be separated with a pair of flush cutters and soldered into PG.
0.7 x 0.8 x 0.35 inch / 17.8 x 20.3 x 9 mm
Input voltage: 5 V to 45 V (minimum input subject to dropout voltage considerations)
Output voltage: 5 V with 4% accuracy
Typical maximum continuous output current: 3.4 A
Typical efficiency of 80% to 95%
Very low dropout voltage
Switching frequency: ~700 kHz under heavy loads
Power-save mode to increase light load efficiency
Low quiescent current
Enable input with the precise cutoff threshold for disconnecting the load
“Power good” output indicates when the regulator cannot maintain the output voltage
Frequency spread spectrum operation to lower peak EMI noise
Under-voltage lockout protection
Soft-start feature to limit inrush current and gradually ramp output voltage
Integrated reverse-voltage protection up to 40 V, over-current and short-circuit protection, over-temperature shutoff
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