Step-Down Schaltregler von Pololu.
Eingangsspannung: 4,5 - 38V
Ausgangsstrom bis zu 2,5A
The D24V25Fx family of step-down voltage regulators generates lower
output voltages from input voltages as high as 38 V. They are switching
regulators (also called switched-mode power supplies (SMPS) or DC-to-DC
converters) with typical efficiencies between 85% and 95%, which is much
more efficient than linear voltage regulators, especially when the
difference between the input and output voltage is large. The available
output current is a function of the input voltage and efficiency (see
the Typical Efficiency and Output Current section below), but the output
current can typically be as high as 2.5 A.
At light loads, the
switching frequency automatically changes to maintain high efficiencies.
These regulators have a typical quiescent (no load) current draw of
less than 1 mA, and the ENABLE pin can be used to put the boards in a
low-power state that reduces the quiescent current to approximately 10
µA to 20 µA per volt on VIN.
The modules have built-in
reverse-voltage protection, short-circuit protection, a thermal shutdown
feature that helps prevent damage from overheating, a soft-start
feature that reduces inrush current, and an under-voltage lockout.
different voltage versions of this regulator all look very similar, so
you should consider adding your own distinguishing marks or labels if
you will be working simultaneously with multiple versions. This product
page applies to all versions of the D24V25Fx family.
higher-power applications, we carry a slightly larger, pin-compatible, 5
V version of this regulator that has a typical maximum output current
of 5 A.
Two even larger, higher-power, 5 V versions of this
regulator are also available: one with a typical maximum output current
of 6 A, and the other with a typical maximum output current of 9 A. The
higher-power versions also have a few additional features, like a “power
good” signal and the ability to lower their output voltage, and they
include optional terminal blocks for easy removable connections.Features
- Input voltage:
- 4.5 V to 38 V for the version that outputs 3.3 V
- [output voltage + dropout voltage] to 38 V for output voltages of 5 V
and higher (see below for more information on dropout voltage)
- Fixed 3.3 V, 5 V, 6 V, 7.5 V, or 9 V output (depending on regulator version) with 4% accuracy
- Typical maximum continuous output current: 2.5 A
Integrated reverse-voltage protection, over-current protection,
over-temperature shutoff, soft-start, and under-voltage lockout
Typical efficiency of 85% to 95%, depending on input voltage and load;
the switching frequency automatically changes at light loads to maintain
- Typical no-load quiescent current under 1 mA; can be reduced to 10 µA to 20 µA per volt on VIN by disabling the board
- Compact size: 0.7″ × 0.7″ × 0.35″ (17.8 mm × 17.8 mm × 8.8 mm)
- Two 0.086″ mounting holes for #2 or M2 screws