| Allicdata Part #: | TL497ACNSR-ND |
| Manufacturer Part#: |
TL497ACNSR |
| Price: | $ 0.00 |
| Product Category: | Integrated Circuits (ICs) |
| Manufacturer: | Texas Instruments |
| Short Description: | IC REG BCK BST INV ADJ 0.5A 14SO |
| More Detail: | Buck, Boost Switching Regulator IC Positive or Neg... |
| DataSheet: |  TL497ACNSR Datasheet/PDF |
| Quantity: | 1000 |
Specifications
| Voltage - Output (Min/Fixed): | ±1.2V |
| Base Part Number: | TL497 |
| Supplier Device Package: | 14-SOP |
| Package / Case: | 14-SOIC (0.209", 5.30mm Width) |
| Mounting Type: | Surface Mount |
| Operating Temperature: | 0°C ~ 70°C (TA) |
| Synchronous Rectifier: | No |
| Frequency - Switching: | -- |
| Current - Output: | 500mA (Switch) |
| Voltage - Output (Max): | 30V, -25V |
| Series: | -- |
| Voltage - Input (Max): | 12V |
| Voltage - Input (Min): | 4.5V |
| Number of Outputs: | 1 |
| Output Type: | Adjustable |
| Topology: | Buck, Boost |
| Output Configuration: | Positive or Negative |
| Function: | Step-Up, Step-Down |
| Part Status: | Active |
| Packaging: | Tape & Reel (TR) |
Description
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TL497ACNSR（Integrated Circuit Voltage Regulator）is a DC-DC switching regulator designed to provide continuous, adjustable output voltage and current in applications such as battery packs and switched power supplies. It is based on a classic switching topology, which contains a power switch, the main driver circuit, the error amplifier, and the feedback and oscillator circuit. This device is built around a regulated switch, a Linear Voltage Regulator (LVR), and a current protection circuit. The TL497ACNSR is a high-efficiency, low-dropout regulator that offers robustness, low noise, and a wide operating range where the input voltage is from 5 V to 30 V and the output voltage can be adjusted from 0 V to 5.5 V for 7 A continuous current.
In the TL497ACNSR device, the main controller is a Linear Voltage Regulator (LVR), and the switching driver is a high-speed MOSFET that operates in tandem with the controller. When the voltage at the output exceeds the reference voltage, the LVR adjusts the switching speed of the MOSFET to increase the output voltage. On the other hand, when the output voltage is below the reference voltage, the LVR reduces the switching speed of the MOSFET to lower the output voltage.
The error amplifier is another important component of the TL497ACNSR device. It produces an error signal that is proportional to the difference between the reference voltage and the output voltage. The error amplifier then sends this signal to the driver circuit which controls the switching of the power FET. The error amplifier also ensures that the output voltage remains constant despite varying levels of input voltage or load current.
The feedback and oscillator circuit controls the switching frequency of the regulator and includes a frequency adjustable resistor, a ramp-up/ramp-down resistor, and a reference current source. When the voltage at the output exceeds the reference voltage, the frequency adjustable resistor limits the amount of current that is available at the MOSFET resulting in a decrease in the switching speed. On the other hand, when the voltage at the output is below the reference voltage, the frequency adjustable resistor turns off the MOSFET before any current flows into the feedback circuit, resulting in an increase in the switching speed.
The current protection circuit is an important feature of the TL497ACNSR device. It is designed to provide over-current protection to ensure that the regulator does not become overloaded. The current protection circuit also prevents excessive power dissipation and limits the output voltage in case of a short circuit.
The TL497ACNSR is a highly versatile DC-DC switching regulator which is applicable in a wide range of applications. It can be used for powering small embedded systems, for supplying power to multiple circuits, and for providing reliable, low-noise adjustable output voltage and current. The device features robustness, efficiency, low noise, and low dropout voltage and is appropriate for applications such as portable devices, communication and consumer products.
The specific data is subject to PDF, and the above content is for reference
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