HG6206
High-performance LDO with 300mA output current, low dropout voltage of 250mV, and ultra-low quiescent current of 2μA
Product Overview
Description
HG6206 is a low-power CMOS LDO regulator designed for battery-powered and portable applications requiring high efficiency and long battery life.
With ultra-low quiescent current of only 2μA and low dropout voltage of 250mV at 300mA load, this LDO maximizes battery life while maintaining excellent regulation performance.
The device features high PSRR of 70dB at 1kHz, making it suitable for noise-sensitive analog circuits and RF applications.
Product Series
HG
Primary Application
Battery-powered portable devices
Key Features
- Ultra-low quiescent current of 2μA extends battery life
- Low dropout voltage of 250mV at 300mA load
- High PSRR of 70dB for noise-sensitive applications
- Excellent load and line regulation
- Current limit and thermal shutdown protection
- Stable with ceramic capacitors
- Available in multiple fixed output voltages
- Wide operating temperature range -40°C to +85°C
Specifications
| Input Voltage Range | 2.5V to 6.0V |
|---|---|
| Output Voltage | 1.2V to 5.0V (fixed versions) |
| Output Current | 300mA maximum |
| Dropout Voltage | 250mV @ 300mA |
| Quiescent Current | 2μA typical |
| PSRR | 70dB @ 1kHz |
| Line Regulation | 0.05%/V typical |
| Load Regulation | 10mV typical |
| Package | SOT-23-5, SOT-89, SOT-223 |
Applications
Battery-powered portable devices
Battery and charging management
Smartphones and tablets
Electronic system design
Wireless sensor nodes
Sensor signal conditioning
Medical instruments
Medical electronics
RF and communication modules
Communication and interface
Precision analog circuits
Electronic system design
IoT devices
Electronic system design
FAE Expert Insights
"HG6206 is an excellent choice for battery-powered applications where every microamp counts. The 2μA quiescent current is among the best in its class, making it ideal for devices that spend most of their time in sleep mode. I've used this LDO in numerous IoT sensor designs where battery life is critical - the low dropout allows operation even as the battery discharges to low voltages. The high PSRR is a bonus for powering sensitive ADCs and RF circuits. For best performance, I recommend using a 1μF ceramic output capacitor close to the device. The multiple package options provide flexibility for different board space constraints."
Ultra-low 2μA quiescent current maximizes battery life
— David Chen, BeiLuo
Frequently Asked Questions
What is the minimum input voltage for HG6206?
The minimum input voltage for HG6206 is 2.5V or Vout + Vdropout, whichever is higher. For a 3.3V output version, you need minimum 3.3V + 0.25V = 3.55V input at 300mA load. At lighter loads, dropout voltage is lower. For example, at 100mA, dropout is typically 100mV, so minimum input would be 3.4V. This makes HG6206 suitable for single-cell Li-ion battery applications (3.0V-4.2V) for 3.3V outputs, and 5V systems for lower output voltages.
Calculate minimum input based on your output voltage and maximum load current. Contact our FAE team for minimum input voltage calculations.
Can HG6206 operate with ceramic output capacitors?
Yes, HG6206 is designed to be stable with ceramic output capacitors. The device uses internal compensation that ensures stability with ceramic capacitors as small as 1μF. This is important because ceramic capacitors are smaller, cheaper, and have lower ESR than tantalum or electrolytic capacitors. I recommend using a 1μF or larger X5R or X7R ceramic capacitor with at least 6.3V rating. Place the capacitor as close as possible to the Vout and GND pins for best transient response and stability.
Use 1μF X5R/X7R ceramic capacitor close to the device. Our FAE team can provide PCB layout recommendations.
How does HG6206 perform under light load conditions?
HG6206 maintains excellent performance under light load conditions. The ultra-low 2μA quiescent current is maintained even at no load, making it ideal for standby applications. Unlike some LDOs that increase quiescent current at light loads, HG6206 maintains low current consumption across the entire load range. Output voltage regulation remains tight under light loads, and the high PSRR is maintained. This makes HG6206 particularly suitable for battery-powered devices that spend most of their time in sleep mode with occasional active periods.
For always-on applications with intermittent loads, HG6206 provides optimal battery life. Contact our FAE team for battery life calculations.
What is the thermal performance of HG6206?
HG6206 thermal performance depends on package and operating conditions. The SOT-89 package has thermal resistance of about 150°C/W junction-to-ambient, while SOT-223 is about 60°C/W. Maximum power dissipation at 25°C ambient is approximately 0.8W for SOT-89 and 2W for SOT-223. For example, with 5V input, 3.3V output, and 300mA load, dissipation is (5-3.3) × 0.3 = 0.51W. Temperature rise in SOT-89 would be 0.51W × 150°C/W = 76.5°C, resulting in junction temperature of 25 + 76.5 = 101.5°C, which is within the 125°C limit. For higher power, use SOT-223 package or add copper area for heat sinking.
Calculate thermal performance for your specific conditions. Use larger package or heatsinking for high power. Our FAE team can provide thermal analysis.
Can HG6206 be used in automotive applications?
HG6206 is available in automotive grade (AEC-Q100 qualified) for automotive applications. The automotive version operates over -40°C to +125°C temperature range and undergoes additional reliability testing. The wide input voltage range and excellent transient response make it suitable for automotive power systems where load dump and cold crank conditions occur. The low quiescent current is beneficial for always-on modules that need to minimize battery drain when the vehicle is parked. Contact our FAE team for automotive grade ordering information.
For automotive applications, specify AEC-Q100 grade when ordering. Contact our automotive FAE team for qualification support.