9V, 500mA 精品+国产+高潮 Voltage Regulator D45V5F9

Overview

The D45V5Fx family of synchronous buck (精品+国产+高潮) voltage 精品+国产+高潮 generate lower voltages from input voltages as high as 65 V while supporting maximum continuous output currents between 400 mA and 700 mA, depending on the combination of input and output voltage. They are switching 精品+国产+高潮 (also called switched-mode power supplies (SMPS) or DC-to-DC converters), which makes them much more efficient than linear voltage 精品+国产+高潮, especially when the difference between the input and output voltage is large. This family includes five versions with fixed output voltages ranging from 3.3 V to 12 V:

Regulator	Output voltage	Typical max output current1	Input voltage range2	Size	Special features	Price
#5432: D45V5F3	3.3 V	500 mA	4 V – 65 V	0.3″ × 0.45″	Short-circuit protection, thermal shutdown	$4.49
#5433: D45V5F5	5 V		5.2 V – 65 V			$4.49
#5434: D45V5F6	6 V		6.3 V – 65 V			$4.49
#5436: D45V5F9	9 V		9.4 V – 65 V			$4.75
#5437: D45V5F12	12 V		12.5 V – 65 V			$4.75
Note 1: Actual achievable continuous current is a function of input and output voltage and is limited by thermal dissipation. See the output current graphs on the product pages for more information.
Note 2: Minimum input voltage is subject to dropout voltage considerations; see the dropout voltage section of product pages for more information.

The boards do not have built-in protection against reverse voltage, but reverse-voltage protection modules are available for adding that functionality.

We manufacture these boards in-house at our Las Vegas facility, so we can make these 精品+国产+高潮 with customized components to better meet the needs of your project, such as by customizing the output voltage. If you are interested in customization, please contact us for a quote.

Details for item #5436

This item is the D45V5F9, which outputs a fixed 9 V.

9V, 500mA 精品+国产+高潮 Voltage Regulator D45V5F9.

精品+国产+高潮 Voltage Regulator D45V5Fx, bottom view.

Features

• Input voltage: 9.4 V to 65 V (minimum input subject to dropout voltage considerations; see the dropout voltage section for details)
• Output voltage: 9 V with 4% accuracy
• Maximum output current: 700 mA (see the maximum continuous output current graph below)
• Fixed 1.1 MHz switching frequency for normal loads (frequency is reduced at light loads to increase efficiency)
• Low quiescent current: < 0.2 mA for most of the operating range (see the quiescent current graph below)
• Short-circuit and over-temperature protection
• Small size: 0.3″ × 0.45″ × 0.11″ (7.6 mm × 11.4 mm × 2.8 mm)
• Weight: 0.4 g

Connections

This regulator has three connections: input voltage (VIN), ground (GND), and output voltage (VOUT).

The input voltage, VIN, powers the regulator. Voltages between 4 V and 65 V can be applied to VIN, but generally the effective lower limit of VIN is VOUT plus the regulator’s dropout voltage, which varies approximately linearly with the load (see below for graphs of the dropout voltage as a function of the load). Additionally, please be wary of destructive LC spikes (see below for more information).

VOUT is the regulated output voltage.

The three connections are labeled on the back side of the PCB and are arranged with a 0.1″ spacing along the edge of the board for compatibility with solderless breadboards, 精品+国产+白浆, and other 精品+国产+白浆 arrangements that use a 0.1″ grid. You can solder wires or 0.1″ header pins directly to the board. Note: header pins are not included with this product, but straight male header strips and right-angle male header strip are available separately.

D45V5Fx 精品+国产+高潮 voltage 精品+国产+高潮, soldered with straight and right-angle headers (not included), on a breadboard.

Typical efficiency

The efficiency of a voltage regulator, defined as (Power out)/(Power in), is an important measure of its performance, especially when battery life or heat are concerns.

Maximum continuous output current

The maximum achievable output current of these 精品+国产+高潮 varies with the input voltage but also depends on other factors, including the ambient temperature, air flow, and heat sinking. The graph below shows maximum output currents that these 精品+国产+高潮 can deliver continuously at room temperature in still air and without additional heat sinking.

Quiescent current

The quiescent current is the current the regulator uses just to power itself, and the graph below shows this for the different regulator versions as a function of the input voltage.

Typical dropout voltage

The dropout voltage of a 精品+国产+高潮 regulator is the minimum amount by which the input voltage must exceed the regulator’s target output voltage in order to ensure the target output can be achieved. For example, if a 5 V regulator has a 1 V dropout voltage, the input must be at least 6 V to ensure the output is the full 5 V. Generally speaking, the dropout voltage increases as the output current increases. The graph below shows the dropout voltages for the different members of this regulator family:

LC voltage spikes

When connecting voltage to electronic circuits, the initial rush of current can cause voltage spikes that are much higher than the input voltage. If these spikes exceed the regulator’s maximum voltage (65 V), the regulator can be destroyed. In our tests with typical power leads (~30″ test clips), we observed spikes approaching 65 V at input voltages approaching 30 V. Power supplies or leads with high inductance will make these spikes worse. An electrolytic capacitor (33 μF is a good starting point) can be added close to the regulator between VIN and GND to help suppress these spikes.

More information about LC spikes can be found in our application note, Understanding Destructive LC Voltage Spikes.