XZ1002
200mA low-quiescent current LDO with 1μA Iq for extended battery life in portable and IoT applications
Product Overview
Description
The XZ1002 is a low-power LDO regulator optimized for battery-powered applications. With ultra-low quiescent current of only 1μA, it minimizes battery drain during standby operation, extending battery life in portable devices.
The device operates from a 2.0V to 5.5V input and delivers up to 200mA output current. It features low dropout voltage and includes enable pin for power management control.
Available in compact SOT-23 and SC-70 packages, the XZ1002 is ideal for space-constrained battery-powered devices such as IoT sensors, wearables, and remote controls.
Product Series
XZ
Primary Application
IoT sensors
Key Features
- Ultra-low quiescent current: 1μA
- Low dropout voltage: 200mV at 200mA
- Enable pin for power management
- Wide input voltage range
- Thermal shutdown protection
- Current limit protection
- Compact packages
Specifications
| Input Voltage | 2.0V - 5.5V |
|---|---|
| Output Voltage | 1.2V - 3.3V (fixed) |
| Output Current | 200mA |
| Dropout Voltage | 200mV @ 200mA |
| Quiescent Current | 1μA (typical) |
| PSRR | 50dB @ 1kHz |
| Operating Temperature | -40°C to +85°C |
| Package | SOT-23-5, SC-70-5 |
Applications
IoT sensors
Sensor signal conditioning
Wearable devices
Electronic system design
Remote controls
Industrial automation and control
Battery-powered devices
Battery and charging management
Always-on power rails
Electronic system design
FAE Expert Insights
"The XZ1002 is specifically designed for battery-powered applications where every microamp counts. The 1μA quiescent current is exceptional - I've seen battery life extend by months in IoT sensor applications just by switching to this LDO. The trade-off is higher noise and lower PSRR compared to the XZ1001, but for digital circuits and always-on rails, this is perfectly acceptable. One design tip: use the enable pin aggressively - shut down the LDO when the subsystem isn't needed. The enable pin has very low leakage, so you won't waste current. Also, the dropout voltage is reasonable at 200mV. Overall, an excellent choice for battery-powered designs where standby current dominates battery life."
Ultra-low 1μA quiescent current ideal for battery-powered IoT devices
— Jennifer Zhang, BeiLuo
Frequently Asked Questions
What is the quiescent current of XZ1002?
XZ1002 has an ultra-low quiescent current of just 1μA typical. This means the LDO itself consumes only 1 microamp of current when enabled with no load, making it ideal for battery-powered applications where standby current is critical.
Use XZ1002 for always-on rails in battery-powered devices; the 1μA Iq minimizes battery drain during standby.
How does XZ1002 extend battery life?
XZ1002 extends battery life by consuming only 1μA during standby. In IoT devices that spend most of their time in sleep mode, this low quiescent current can mean the difference between months and years of battery life. For example, with a CR2032 battery, 1μA quiescent current allows 25+ years theoretical standby time.
Calculate total standby current including LDO Iq; XZ1002's 1μA Iq is negligible for most battery applications.
What is the dropout voltage of XZ1002?
XZ1002 has a typical dropout voltage of 200mV at 200mA load. At lighter loads, dropout voltage decreases proportionally. For example, at 100mA load, dropout is approximately 100mV. This allows efficient operation even as the battery voltage decreases.
Ensure sufficient headroom between minimum input voltage and output voltage; consider dropout when battery is near end of discharge.
Can I use the enable pin for power management?
Yes, the enable pin allows you to shut down the LDO when not needed, reducing current consumption to less than 100nA. This is useful for powering subsystems that are only active intermittently. The enable pin has very low leakage current, so it won't waste power when disabled.
Use enable pin to power down unused subsystems; connect to microcontroller GPIO for software-controlled power management.
Is XZ1002 suitable for always-on power rails?
Yes, XZ1002 is specifically designed for always-on power rails in battery-powered devices. The 1μA quiescent current makes it ideal for powering real-time clocks, standby circuits, and always-on sensors where battery life is critical.
Use XZ1002 for always-on rails; consider XZ1001 if noise performance is more important than quiescent current.