Key facts
- Brand
- Linear Technology
- Model
- LTC3576
- Industry
- Industrial
- Documents
- 2
- Languages
- EN
- Last added
- 2012-06-05
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LTC3576 USB Power Management IC Application Note
The document introduces the LTC3576, an integrated USB battery charger and power manager designed to combine USB On-The-Go functionality with battery charging in portable products. It explains how the device handles bidirectional power flow between a host and a peripheral using a switching regulator.
The text details the operational modes of the LTC3576, including its ability to act as a step-down converter for charging or a step-up converter for OTG A-device functionality. It covers mode detection protocols, system implementation strategies involving I2C control registers, and specific configurations for overvoltage protection and battery monitoring.
Linear Technology LTC3576 specifications
| Input Supply Voltage (Veus) | 4.35 V – 5.5 V |
|---|---|
| Low Power Suspend Mode Current | 0.32 mA – 0.5 mA |
| Overvoltage Protection Threshold | 6.35 V – 6.7 V (with 6.2 kΩ series resistor) |
| Battery Float Voltage (LTC3576) | 4.179 V – 4.221 V |
| Package | 38‑lead plastic QFN (4 mm × 6 mm) |
All Linear Technology LTC3576 documents by type
Ratings, dimensions and ordering codes, for selection and design work.
How to use the product for one specific task, with worked examples.
Questions answered in these manuals
What is the maximum current a USB charger can supply?
A device designated as a USB charger can supply up to 1.54.
What are the maximum current ratings for the LTC3576's step-down regulators?
The IC provides two 400mA and one 1A step-down switching regulators.
What voltage does the USB On‑the‑Go output provide?
The device can generate a 5 V output at up to 500 mA for USB On‑the‑Go applications.
What package is the LTC3576/LTC3576-1 offered in?
It is supplied in a 38‑lead plastic QFN package measuring 4 mm × 6 mm × 0.75 mm.