Sindachip Voltage Regulators | BeiLuo Distributor

About Voltage Regulators

Sindachip voltage regulators provide stable, low-noise power supply solutions for analog and digital circuits. The portfolio includes low-dropout (LDO) linear regulators with excellent line/load regulation.

As an authorized distributor of Sindachip, BeiLuo provides a comprehensive range of Voltage Regulators products. These products are widely used in industrial control, automotive electronics, consumer electronics, and communication equipment. We offer a complete product line with multiple series to meet various application requirements. All products are genuine and original, backed by professional technical support and comprehensive after-sales service.

Selection Guide: How to Choose the Right Voltage Regulators

Product List

4 products available

Part Number ↕	Input Voltage ↕	Output Voltage ↕	Output Current ↕	Dropout Voltage ↕	Quiescent Current ↕	Package ↕	Stock Status	Action
SGM2019	2.5V to 5.5V	1.2V to 3.3V (fixed)	300mA	270mV at 300mA	90μA	SOT-23-5, SC-70-5	In Stock	View Details
SGM2028	2.5V to 5.5V	1.2V to 3.3V (fixed)	500mA	350mV at 500mA	35μA	SOT-23-5, DFN-8	In Stock	View Details
SGM2033	2.5V to 5.5V	1.2V to 3.3V (fixed/adj)	200mA	120mV at 200mA	45μA	SOT-23-5, DFN-6	In Stock	View Details
SGM2040	2.0V to 5.5V	1.2V to 3.3V (fixed)	150mA	250mV at 150mA	1μA	SOT-23-5, SC-70-5	In Stock	View Details

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Frequently Asked Questions

What is dropout voltage in an LDO regulator?

Dropout voltage is the minimum difference between input and output voltage required for the LDO to maintain regulation. Low-dropout regulators have dropout voltages from 50mV to 500mV depending on load current.

Select LDOs with dropout voltage at least 200-300mV below your minimum input voltage.

What is PSRR and why does it matter?

PSRR (Power Supply Rejection Ratio) measures how well a regulator rejects ripple and noise on the input supply from appearing at the output. Higher values indicate better rejection. PSRR is specified in decibels (dB), with higher values indicating better rejection. For analog and RF circuits, select LDOs with PSRR greater than 60dB at your frequencies of interest for optimal performance.

For analog/RF circuits, select LDOs with PSRR >60dB at your frequencies of interest.

How do I select the right output capacitor for an LDO?

Most modern LDOs are stable with ceramic capacitors from 1μF to 10μF. Use X5R or X7R ceramics for temperature stability. Most modern LDOs are stable with ceramic capacitors from 1μF to 10μF. Use X5R or X7R ceramics for temperature stability. Place capacitors close to the output pin for best transient response.

Use 1-10μF ceramic capacitors close to LDO output.

What is the difference between fixed and adjustable output LDOs?

Fixed output LDOs have internally set output voltages and require no external resistors. Adjustable output LDOs use external resistor dividers to set any output voltage within the device's range. Fixed output LDOs have internally set output voltages and require no external resistors, making them simpler to use. Adjustable output LDOs use external resistor dividers to set any output voltage within the device's range.

Use fixed LDOs for standard voltages. Use adjustable LDOs for custom output voltages.

How does quiescent current affect battery life?

Quiescent current is the current consumed by the LDO's internal circuitry. In battery-powered devices with light loads, quiescent current can dominate total power consumption. In battery-powered devices with light loads, quiescent current can dominate total power consumption. Selecting low-Iq LDOs is essential for maximizing battery life in portable applications.

For battery-powered circuits, select LDOs with quiescent current <10μA.