Overview
The LTC4041EUFD#PBF, produced by Analog Devices Inc., is a 2.5A Supercapacitor Backup Power Manager. This device is designed to provide a complete supercapacitor backup system for supply rails ranging from 2.9V to 5.5V. It integrates a high current step-down DC/DC converter to charge a single supercapacitor or two supercapacitors in series. During power failure, the step-down regulator operates in reverse as a step-up regulator to deliver power from the supercapacitor(s) to the system output. The device also features an adjustable input current limit, external disconnect switch, and optional input overvoltage protection (OVP) circuit to protect against high voltage damage.
Key Specifications
| Parameter | Value | Units |
|---|---|---|
| Manufacturer | Analog Devices Inc. | |
| Package Type | QFN-24 (4mm × 5mm × 0.75mm) | |
| Input Voltage Range | 2.9 to 5.5 | V |
| Temperature Range | -40 to 125 | °C |
| Number of Pins | 24 | |
| RoHS Compliance | Yes | |
| Maximum Output Voltage | 5 | V |
| Quiescent Current in Charger Mode | 800 to 1600 | µA |
| PFI Delay to PFO | 0.5 | µs |
| Logic Input Voltage (Low/High) | 0.4 / 1.2 | V |
Key Features
- High current step-down DC/DC converter for charging supercapacitors.
- Step-up regulator operation during power failure to deliver power from supercapacitors.
- Adjustable input current limit to protect the input supply from overload.
- External disconnect switch to isolate the input supply during backup.
- Optional input overvoltage protection (OVP) circuit.
- Internal supercapacitor balancing circuit.
- Low quiescent current in sleep and backup modes.
- Logic inputs for control (BSTEN, CHGEN, CAPSEL, CAPFLT).
Applications
The LTC4041EUFD#PBF is ideal for various applications requiring backup power management, including:
- Portable devices and handheld electronics.
- Backup power systems in industrial and automotive applications.
- Systems requiring reliable power backup during temporary power outages.
- Space-constrained designs where compact packaging is essential.
Q & A
- What is the primary function of the LTC4041EUFD#PBF?
The primary function is to provide a complete supercapacitor backup power management system for supply rails ranging from 2.9V to 5.5V. - What type of package does the LTC4041EUFD#PBF come in?
The device comes in a 24-lead QFN (4mm × 5mm × 0.75mm) package. - What is the operating temperature range of the LTC4041EUFD#PBF?
The operating temperature range is -40°C to 125°C. - Does the LTC4041EUFD#PBF have overvoltage protection?
Yes, it has an optional input overvoltage protection (OVP) circuit. - How does the device manage supercapacitor charging and discharging?
The device uses a high current step-down DC/DC converter to charge the supercapacitor and operates as a step-up regulator during power failure to deliver power from the supercapacitor. - What is the quiescent current in charger mode?
The quiescent current in charger mode is 800 to 1600 µA. - Is the LTC4041EUFD#PBF RoHS compliant?
Yes, the device is RoHS compliant. - What are the typical applications of the LTC4041EUFD#PBF?
Typical applications include portable devices, handheld electronics, and backup power systems in industrial and automotive applications. - Does the device have an internal supercapacitor balancing circuit?
Yes, it has an internal supercapacitor balancing circuit. - How does the device protect the input supply during charging?
The device has an adjustable input current limit to protect the input supply from overload.
