SPARKOS Labs SS1117 Discrete Voltage Regulator
Range of discrete regulators designed to replace monolithic adjustable regulators. They have the standard 3-pin TO-220 format and have a fixed voltage with over 1A available at the output.
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The brand Sparkos Labs, specialized in designing high-quality discrete electronic components, has created a range of discrete regulators designed to replace adjustable monolithic regulators. These regulators come in the standard TO-220 package with 3 pins and have a fixed voltage with more than 1A available at the output.
SS1117-0.9
Presenting the Sparkos Labs SS1117 model, a discrete voltage regulator with positive polarities that allows replacing LM1117 or LM317 regulators. This offers a fixed output voltage of +9V.
Sparkos Labs SS1117-05 Discrete Voltage Regulator +5V
Why Discrete Regulators?
These discrete regulators outperform all TO-220 monolithic regulators in terms of output noise, transient response, and load regulation. This discrete design allows the integration of many internal capacitors that cannot be integrated into an integrated circuit. Additionally, the discrete controller has an onboard output decoupling capacitor, eliminating the need to install one externally. The error amplifier of this controller is also completely discrete, based on a slightly modified SS3601 op-amp. The internal voltage reference is a precision shunt reference with post-RC filtering that allows for extremely low noise. In this design, the error amplifier compares a feedback voltage with a reference voltage.
Discrete and Small
These discrete regulators are the smallest models available on the market. They have a width of 11.4 mm, 1.3 mm wider than a standard TO-220 package. Due to their small size, they can be combined with narrow heat sinks or even fit the existing heat sink mounting hole in your equipment. The tab at the top of the regulator is not covered by the PCB, allowing for easy mounting. The pins are placed in the same manner as in a TO-220 format controller.
Replacing Regulators
To replace a monolithic regulator with a discrete model, it is necessary to know its polarity, pinout, and output voltage. In the case of an adjustable regulator, its output voltage is fixed by the circuit in which it is integrated through a resistor that must be short-circuited and removed.
It is not recommended to attempt to dynamically adjust the output voltage of these discrete controllers using potentiometers or voltage dividers on the ground pin to achieve the specified performance.
If a regulator to be replaced is mounted on a heat sink, the same heat sink should be used with the discrete replacement regulator. There is no need to use a larger heat sink. The existing heat sink will be sufficient. Since the tab of these discrete regulators is connected to the input voltage, electrical isolation must be used between the tab and the heat sink.
The input and output bypass capacitors of the existing circuit should also be adapted and require no modification for normal operation. If the nearest output capacitor to the regulator is ceramic or film type, better transient response can be obtained by removing it from the circuit, as ceramic and film capacitors degrade the device’s phase margin. In cases where the output capacitor is removed from the circuit, the internal 10uF tantalum polymer capacitor will be sufficient as an output capacitor, and the device will operate with greater phase margin and lower transient response.
The best transient response can be obtained using a Panasonic EEU - FR1H101B electrolytic capacitor (100μF 50V 65mΩ ESR) as the output capacitor. This capacitor can be used to replace the existing output capacitor or can be added in parallel. Correct polarity must be observed when installing these electrolytic capacitors.
Maximum Characteristics:
- Input Voltage: +43V
- Output Current: 1.5A
- Total Power Dissipation at Tc = 25°C: 50W
- Thermal Resistance, Junction to Case: 2.5°C/W
- Thermal Resistance, Junction to Ambient: 62.5°C/W
- Operating Ambient Temperature: -25 to +85°C
Performance:
- Input Voltage: Vo +2V to +40V
- Quiescent Current: 14 to 22mA
- Minimum Output Current: 0mA
- Output Voltage Accuracy: -1.5% to +1.5%
- Dropout Voltage at 1A Output Current: 1.85 to 2V
- Output Impedance: 2mOhm
- Maximum Output Current: 1A
- Ripple Rejection at 100Hz: -125dB
- Load Regulation from Io = 0 to 1A: 1.8mV
