Overview
The LTC3260EDE#PBF is a low noise dual polarity output power supply produced by Analog Devices Inc. This device integrates an inverting charge pump along with both positive and negative Low Dropout (LDO) regulators, making it a versatile solution for various power management needs. It is designed to provide efficient and stable power supply with minimal noise, which is crucial in sensitive electronic systems.
Key Specifications
| Parameter | Value |
|---|---|
| Package Type | 14-Lead Plastic DFN |
| Temperature Range | –40°C to 125°C |
| Input Voltage Range | Up to 32V |
| Output Voltage (Charge Pump) | –0.94 * VIN (Burst Mode), –VIN (Constant Frequency Mode) |
| Output Voltage (LDO+) | Adjustable, requires low ESR capacitor |
| Output Voltage (LDO–) | Adjustable, requires low ESR capacitor |
| Oscillator Frequency | Typically around 1 MHz |
| Quiescent Current | Typically around 120 µA (Constant Frequency Mode) |
| Shutdown Current | Less than 1 µA |
| EN– Threshold Rising | 1.1 to 2.0 V |
| EN– Threshold Falling | 0.4 to 1.0 V |
Key Features
- Low noise operation, making it suitable for noise-sensitive applications.
- Inverting charge pump with both positive and negative LDO regulators.
- High efficiency and stable output voltages.
- Low quiescent current and shutdown current for power-saving.
- Adjustable output voltages for LDO+ and LDO– regulators.
- Compact 14-Lead Plastic DFN package.
- Wide operating temperature range from –40°C to 125°C.
Applications
The LTC3260EDE#PBF is suitable for a variety of applications requiring dual polarity power supplies with low noise and high efficiency. These include:
- Portable electronics and battery-powered devices.
- Industrial control systems and automation.
- Medical devices requiring stable and noise-free power supplies.
- Aerospace and automotive systems where reliability and temperature stability are critical.
- Telecommunication equipment and networking devices.
Q & A
- What is the primary function of the LTC3260EDE#PBF?
The primary function is to provide a low noise dual polarity output power supply using an inverting charge pump and both positive and negative LDO regulators. - What are the available package types for the LTC3260?
The LTC3260 is available in 14-Lead Plastic DFN and 16-Lead Plastic MSOP packages. - What is the operating temperature range of the LTC3260EDE#PBF?
The operating temperature range is from –40°C to 125°C. - How is the output voltage of the charge pump regulated?
In constant frequency mode, the charge pump output is driven to –VIN, and in burst mode, it is regulated to –0.94 * VIN using an internal burst comparator. - What is the typical quiescent current of the LTC3260?
The typical quiescent current is around 120 µA in constant frequency mode. - Can the LTC3260 be used in automotive applications?
Yes, there are versions of the LTC3260 designated for automotive applications with controlled manufacturing to support quality and reliability requirements. - What is the purpose of the EN– pin?
The EN– pin is used for enabling or disabling the device, with internal pull-down current to ensure it is in a defined state. - How should the VIN pin be bypassed?
The VIN pin should be bypassed with a low impedance ceramic capacitor. - What are the typical applications of the LTC3260?
Typical applications include portable electronics, industrial control systems, medical devices, aerospace, automotive systems, and telecommunication equipment. - What is the significance of the exposed pad in the MSOP package?
The exposed pad must be soldered to the PCB ground for stability and thermal management.
