XZ5002
500mA compact Li-ion charger with integrated pass element for small battery applications
Product Overview
Description
The XZ5002 is a compact linear charger designed for small battery applications such as wearables and IoT devices. It delivers up to 500mA charge current in a tiny package.
The device includes all standard safety features including thermal regulation, automatic recharge, and preconditioning. Charge current is programmable via external resistor.
Available in ultra-small SC-70 and 1.5mm x 1.5mm DFN packages, the XZ5002 is one of the smallest complete battery chargers available, making it ideal for space-constrained designs.
Product Series
XZ
Primary Application
Wearable devices
Key Features
- Ultra-compact package options
- Up to 500mA programmable charge current
- ±1% charge voltage accuracy
- Automatic recharge
- Preconditioning for deeply discharged cells
- Thermal regulation
- Low reverse leakage current
- Charge status indication
Specifications
| Input Voltage | 4.25V - 6V |
|---|---|
| Charge Current | Up to 500mA (programmable) |
| Battery Type | Single-cell Li-ion/Li-poly |
| Charge Voltage | 4.2V (±1% accuracy) |
| Trickle Charge Current | 50mA |
| Operating Temperature | -40°C to +85°C |
| Package | SC-70-5, DFN-6 (1.5mm x 1.5mm) |
Applications
Wearable devices
Electronic system design
IoT sensors
Sensor signal conditioning
Smart watches
Electronic system design
Fitness trackers
Electronic system design
Small handheld devices
Electronic system design
FAE Expert Insights
"The XZ5002 is specifically designed for small battery applications where space is critical. The SC-70 package is tiny, and the 1.5mm x 1.5mm DFN is even smaller. I've used this in smartwatch designs where every millimeter counts. The 500mA maximum current is perfect for the small batteries used in wearables (typically 100-300mAh). The thermal regulation works well - even at 500mA, the small package stays within safe limits with minimal PCB copper. One design tip: the small package has higher thermal resistance, so don't push the current too high unless you have good heat sinking. For typical wearable batteries charging at 0.5C (100-150mA), this charger works perfectly without thermal issues."
Ultra-compact charger ideal for wearable and IoT applications with small batteries
— Amy Zhang, BeiLuo
Frequently Asked Questions
How small is the XZ5002 package?
XZ5002 is available in SC-70-5 (2mm x 1.25mm) and ultra-small DFN-6 (1.5mm x 1.5mm) packages. These compact packages make XZ5002 one of the smallest complete battery chargers available, perfect for space-constrained wearable and IoT applications.
Use DFN package for minimum size; SC-70 for easier assembly; both packages have same electrical performance.
What battery sizes is XZ5002 suitable for?
XZ5002 is ideal for small Li-ion batteries typically used in wearables and IoT devices, such as 100mAh to 500mAh capacities. The 500mA maximum charge current supports 0.5C to 1C charging rates for these battery sizes. For larger batteries, consider XZ5001 with higher current capability.
XZ5002 for batteries 100-500mAh; XZ5001 for larger batteries requiring faster charging.
What is the difference between XZ5001 and XZ5002?
XZ5001 supports up to 800mA charge current in SOT-23 and DFN-8 packages, suitable for larger batteries. XZ5002 supports up to 500mA in smaller SC-70 and DFN-6 packages, ideal for space-constrained designs with smaller batteries. Both offer similar features and safety protection.
XZ5001 for higher current (800mA) and larger batteries; XZ5002 for minimum size with 500mA capability.
Does XZ5002 have thermal regulation?
Yes, XZ5002 includes thermal regulation that automatically reduces charge current if the die temperature exceeds safe limits. This protects the charger from overheating, especially important in the small packages with limited heat dissipation. The feature is automatic and requires no external components.
Thermal regulation is automatic; feature protects against overheating; important for small packages.
Can XZ5002 be used in wearable devices?
Yes, XZ5002 is specifically designed for wearable devices. The ultra-compact package, 500mA current capability (perfect for small wearable batteries), and low power consumption make it ideal for smartwatches, fitness trackers, and other wearables. The thermal regulation ensures safe operation in compact enclosures.
XZ5002 is excellent for wearables; small size and appropriate current for typical wearable batteries.