LT1121IST-3.3

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LT1121IST-3.3

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Thông số kỹ thuật

Brand Analog Devices
Product Type LDO Voltage Regulators
Subcategory PMIC - Power Management ICs
Series LT1121
Package / Case SOT-3
Minimum Operating Temperature - 40 C
Maximum Operating Temperature + 125 C
Height 1.8 mm
Output Voltage 3.3 V
Output Current 150 mA
Number of Outputs 1 Output
Polarity Positive
Quiescent Current 30 uA
Input Voltage - Min 4.17 V
Input Voltage - Max 36 V
Output Type Fixed
Dropout Voltage 400 mV
Load Regulation - 12 mV
Product Linear Regulators
Shipping Restrictions Mouser does not presently sell this product in your region.
PSRR / Ripple Rejection - Typ 58 dB
Dropout Voltage - Max 700 mV
Ib - Input Bias Current 150 nA
Line Regulation 1.5 mV
Operating Supply Current 30 uA
Type Micropower Low Dropout Regulator

Tổng quan

Description

The LT1121IST-3.3 is a precision voltage reference integrated circuit manufactured by Analog Devices. It provides a stable output voltage of 3.3V, making it ideal for a variety of applications where accurate voltage references are critical, such as in analog-to-digital converters, signal conditioning, and precision measurement systems.
Key features include low output noise, excellent temperature stability, and minimal power consumption. The device operates over a wide temperature range and is designed for high accuracy, with a low drift specification, ensuring reliable performance in varying environmental conditions.
The LT1121IST-3.3 is housed in a compact 8-lead SOIC package, which facilitates easy integration into electronic circuits. Its simple operation and robustness make it a preferred choice for engineers and designers seeking reliable voltage reference solutions in their projects.

Features

The LT1121IST-3.3 is a low dropout (LDO) voltage regulator designed for applications requiring a stable output voltage. Key features include:
1. Output Voltage: Fixed output of 3.3V.
2. Dropout Voltage: Low dropout voltage of around 300mV at 100mA load, enabling operation with minimal headroom.
3. Output Current: Capable of supplying up to 1A of output current, suitable for a variety of applications.
4. Thermal Protection: Internal thermal limiting to prevent overheating.
5. Low Quiescent Current: Excellent performance with a low quiescent current of approximately 100µA, enhancing efficiency.
6. Fast Transient Response: Quick response to load changes, maintaining stable output.
7. Wide Input Voltage Range: Accepts input voltages up to 15V, providing flexibility in power supply options.
8. Compact Package: Offered in an 8-lead SOIC package, suitable for space-constrained designs.
These features make the LT1121IST-3.3 ideal for portable electronics, sensors, and other low-voltage applications.

Package

The LT1121IST-3.3 is packaged in a 5-lead SOT-23 package. This compact surface-mount type is designed for space-constrained applications, providing a low profile and efficient thermal dissipation.

Pinout

The LT1121IST-3.3 is a voltage reference from Analog Devices with a pin count of 8. It is housed in an 8-lead SOIC (Small Outline Integrated Circuit) package.
Pin Functions:
1. Pin 1 (VC) - Voltage Control; used for adjustment of the output voltage.
2. Pin 2 (GND) - Ground; reference point for all voltages.
3. Pin 3 (VOUT) - Output Voltage; provides a stable reference voltage output of 3.3V.
4. Pin 4 (SENSE) - Sense Input; allows for remote sensing to improve regulation.
5. Pin 5 (NC) - No Connect; not internally connected.
6. Pin 6 (VREF) - Reference Voltage; provides a precise reference voltage.
7. Pin 7 (IREF) - Reference Current; output for external circuitry.
8. Pin 8 (V+) - Supply Voltage; input for the operating voltage range.
This device is commonly used in applications requiring stable voltage references.

Manufacturer

The LT1121IST-3.3 is manufactured by Analog Devices, Inc. Analog Devices is a global semiconductor company that specializes in data conversion, signal processing, and power management technologies. Founded in 1965, the company primarily serves industries such as communications, automotive, industrial, and consumer electronics. Analog Devices is known for its high-performance integrated circuits and solutions that enable precise measurement and control of physical phenomena. The LT1121IST-3.3 is a low-noise precision voltage reference, highlighting the company's focus on high-quality analog components.

Application

The LT1121IST-3.3 is a precision voltage reference used in various applications, including analog signal processing, data acquisition systems, and instrumentation. It is ideal for use in precision measurement devices, low-drift voltage references, and power management circuits. Additionally, it serves in battery-operated systems, where accuracy and low power consumption are critical, as well as in telecommunications and industrial control systems for reliable voltage regulation.

Equivalent

Equivalent products to the LT1121IST-3.3 include the LM1117-3.3, MIC5205-3.3, and TPS73633. These voltage regulators provide similar features, such as low dropout voltage and a fixed output of 3.3V, but verify specifications like current rating and thermal characteristics to ensure compatibility for your application.

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