Pololu 3.3V, 500mA Step-Down Spannungsregler D24V5F3

Pololu 3.3V, 500mA Step-Down Spannungsregler D24V5F3

(3 Reviews)

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SKU: PO2842
GTIN: 4060137016042
Category: Step-Down
Manufacturers: Pololu
MPN: 2842
Storage Tiers: Tier3

Überblick

The D24V5Fx family of buck (step-down) voltage regulators generates lower output voltages from input voltages as high as 36 V. They are switching regulators (also called switched-mode power supplies (SMPS) or DC-to-DC converters) and have a typical efficiency between 80% to 93%, which is much more efficient than linear voltage regulators, especially when the difference between the input and output voltage is large. These regulators have a power-save mode that activates at light loads and a low quiescent (no load) current draw, which make them well suited for low-power applications that are run from a battery.

The different versions of this regulator all look very similar, so the bottom silkscreen includes a blank space where you can add your own distinguishing marks or labels. This product page applies to all eight versions of the D24V5Fx family.

The regulators feature short-circuit/over-current protection, and thermal shutdown helps prevent damage from overheating. The boards do not have reverse-voltage protection.

The picture on the right shows a 1 A D24V10Fx regulator next to a 0.5 A D24V5Fx regulator and a common 7805 linear regulator in a TO-220 package.

Eigenschaften

Input voltage:
- 3 V to 36 V for output voltages of 1.8 V and 2.5 V
- [output voltage + dropout voltage] to 36 V for output voltages of 3.3 V and higher (see below for more information on dropout voltage)
Fixed 1.8 V, 2.5 V, 3.3 V, 5 V, 6 V, 9 V, 12 V, or 15 V output (depending on regulator version) with 4% accuracy
Maximum output current: 500 mA
Typical efficiency of 80% to 93%
500 kHz switching frequency (when not in power-save mode)
200 µA typical no-load quiescent current
Integrated over-temperature and over-current shutoff
Small size: 0.5" × 0.4" × 0.1" (13 mm × 10 mm × 3 mm)

Storage Tiers:	Tier3
Output Voltage:	3.3V
Output Current max.:	500mA
Operating Voltage max.:	36V
Operating Voltage min.:	3.4V
Regulator-Function:	Step-Down
Quiescent Current max.:	0.2mA
Output-Type:	fixed
Shipping weight:	0,01 kg
Item weight:	0,00 kg
Dimensions ( Length × Width × Height ):	1,10 × 1,30 × 0,30 cm

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Most helpful item review

1 from 1 person found this helpful.

Idealer Low-Drop-Regler für 3V-2xAA-Batterie-Applikationen
Viele 3V-versorgte Schaltungen kommen meist auch mit 3,3V klar. Wenn nicht, kann man mit einer SB130-Schottky-Diode den Ausgang um 0,3V verringern.
Eingangsseitig kann man problemlos 5V-Powerbanks verwenden, die einfach nachzuladen sind. Es ist aber auch der direkte Anschluss einer ungeschützten
18650-Li-Ion-Zelle möglich, da die Schaltung unter 2,6V Eingangssspannung sicher abschaltet und damit eine Tiefentladung verhindert.
Bei einem Laststrom von 80mA wird bis hinab bis 3,4V Eingangsspannung noch 3,3V am Ausgang erreicht. Darunter folgt die Ausgangsspannung der Eingangsspannung mit ca. 100mV Spannungsabfall, was für batteriebetriebene Schaltungen problemlos ist.

Hartmuth N , 02.01.2019 Verified purchase