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The AMC7135 is a low dropout current regulator rated for 350mA constant sink current. The low quiescent current and low dropout voltage are achieved by advanced Bi-CMOS process.
This blog will introduce AMC7135 systematically from its features, pinout to its specifications, applications, also including AMC7135 datasheet and so much more.
The following figure is the diagram of AMC7135 pinout.
AMC7135 Pinout
| Pin Number | Pin Name | Pin Description |
| 1 | Output Voltage (OUT) | Output Voltage of the Regulator |
| 2 | Ground | Ground Pin of the Regulator |
| 3 | Input Voltage (VDD) | The input voltage which has to be regulated is given to this pin |
LM1117, LM338, LM317T, XC6206P332MR
Using the AMC7135 Current Regulator IC is pretty much straight forward, it is a fixed current regulator IC so connecting the power to its input and attaching a load to the output does the job pretty easily. The ground pin needs to be connected to the ground and two decoupling capacitors need to be connected both to the input and the output to make the output current stable. The basic circuit diagram for this IC is shown below.
AMC7135 Circuit Diagram
The output capacitor CO may be removed under certain conditions. Please refer to the following figure. If LED and AMC7135 are located in the same PCB, and the length of the routing path L1<10cm & L2<3cm, the output capacitor CO can be neglected.
If LED and AMC7135 are located in separate PCBs, or the length of the routing path L1>10cm or L2>3cm, the output capacitor CO should be added. Typically, capacitance of 0.1uF ~ 1uF is recommended and 1uF is needed when L2 is much longer than 3cm.
For more information you can check out the datasheet of the device linked in the bottom of the page.
The following figure shows the block diagram of AMC7135.
AMC7135 Block Diagram
The following diagram shows the AMC7135 package.
AMC7135 Package
The AMC7135 Current Regulator IC, meaning it has two Op-Amp s inside it and each Op-Amp can be used independently.
The AMC7135 is a low dropout current regulator It is known for its small form factor since it is available as a DCY Package (SMD Component). There are two variants of this IC and you can choose SOT-89 and TO-252 the TO-252 is mildly superior than that of the TO-252.So if you are looking for a SMD component voltage regulator then this IC might be the right choice for you.
| Input Voltage, VDD | -0.3V to 7V |
| Output Voltage, VOUT | -0.3V to 7V |
| Maximum Junction Temperature, TJ | 150 C |
| Storage Temperature Range | -40 C to 150 C |
| Lead Temperature (Soldering, 10 seconds) | 260 C |
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You can download AMC7135 datasheet from the link given below:
Note: Please check their parameters and pin configuration before replacing them in your circuit.
A low-dropout regulator (LDO regulator) is a DC linear voltage regulator that can regulate the output voltage even when the supply voltage is very close to the output voltage.
Basically, there are two types of Voltage regulators: Linear voltage regulator and Switching voltage regulator.
A current regulator provides in this case the voltage commands to the inverter. This type of control is commonly referred as vector control. An advantage of using current regulators is that they allow an effective protection of machine and power converter against overloads or even short circuits.
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