Specifications
| Attribute | Value |
| Package / Case | Tube,Tube |
| Part Status | Obsolete |
| Function | Ratiometric |
| Output Configuration | Positive or Negative |
| Topology | Charge Pump |
| Output Type | Fixed |
| Number of Outputs | 1 |
| Voltage - Input (Min) | 2V |
| Voltage - Input (Max) | 5.5V |
| Voltage - Output (Min/Fixed) | -Vin, 2Vin |
| Current - Output | 125mA |
| Frequency - Switching | 500kHz, 1MHz |
| Synchronous Rectifier | No |
| Operating Temperature | -40°C ~ 85°C (TA) |
| Mounting Type | Surface Mount |
Overview
Description
The MAX1681ESA is a high-efficiency, step-up DC-DC converter designed by Maxim Integrated. It is commonly used for boosting lower battery voltages to higher levels required by various electronic devices. The MAX1681ESA operates with a wide input voltage range, typically from 0.8V to 5.5V, making it suitable for single-cell battery applications.
Key features include a high switching frequency that allows for the use of small external components, a current-limited, pulse-frequency modulation (PFM) mode for high efficiency at light loads, and low quiescent current to maximize battery life. The device typically outputs a fixed or adjustable voltage up to 6V. It also includes built-in protections like over-temperature shutdown and current limiting to enhance reliability.
The MAX1681ESA is packaged in an 8-pin SOIC form factor, which makes it easy to integrate into compact designs. This converter is suitable for portable devices, such as pagers, handheld instruments, and wireless devices, where efficiency and size are critical considerations.
Key features include a high switching frequency that allows for the use of small external components, a current-limited, pulse-frequency modulation (PFM) mode for high efficiency at light loads, and low quiescent current to maximize battery life. The device typically outputs a fixed or adjustable voltage up to 6V. It also includes built-in protections like over-temperature shutdown and current limiting to enhance reliability.
The MAX1681ESA is packaged in an 8-pin SOIC form factor, which makes it easy to integrate into compact designs. This converter is suitable for portable devices, such as pagers, handheld instruments, and wireless devices, where efficiency and size are critical considerations.
Equivalent
The MAX1681ESA is a high-efficiency, step-up DC-DC converter. Equivalent products include:
1. LT1302 from Analog Devices (formerly Linear Technology)
2. TPS61040 from Texas Instruments
3. MCP1640 from Microchip Technology
These alternatives offer similar voltage conversion capabilities and efficiency suitable for similar applications. Always check the specific datasheets to ensure compatibility with your design requirements.
1. LT1302 from Analog Devices (formerly Linear Technology)
2. TPS61040 from Texas Instruments
3. MCP1640 from Microchip Technology
These alternatives offer similar voltage conversion capabilities and efficiency suitable for similar applications. Always check the specific datasheets to ensure compatibility with your design requirements.
Features
The MAX1681ESA is a DC-DC boost converter IC designed for efficient power management. Key features include:
1. Low Start-Up Voltage: It operates from a low input voltage, making it suitable for applications powered by single-cell batteries.
2. High Efficiency: Delivers high efficiency across a wide range of load conditions, optimizing battery life.
3. Fixed 5V Output: Provides a stable 5V output voltage, ideal for powering microcontrollers and other low-power devices.
4. Low Quiescent Current: Features a low quiescent current, which helps extend battery life in portable devices.
5. Compact Package: Available in an 8-pin SO package, making it suitable for space-constrained applications.
These features make the MAX1681ESA ideal for applications such as portable electronics, battery-powered devices, and other systems requiring efficient step-up voltage conversion.
1. Low Start-Up Voltage: It operates from a low input voltage, making it suitable for applications powered by single-cell batteries.
2. High Efficiency: Delivers high efficiency across a wide range of load conditions, optimizing battery life.
3. Fixed 5V Output: Provides a stable 5V output voltage, ideal for powering microcontrollers and other low-power devices.
4. Low Quiescent Current: Features a low quiescent current, which helps extend battery life in portable devices.
5. Compact Package: Available in an 8-pin SO package, making it suitable for space-constrained applications.
These features make the MAX1681ESA ideal for applications such as portable electronics, battery-powered devices, and other systems requiring efficient step-up voltage conversion.
Pinout
The MAX1681ESA is a DC-DC converter IC designed by Maxim Integrated. It is a step-up (boost) converter primarily used to generate a higher output voltage from a lower input voltage. Regarding its pin count and function, the MAX1681ESA typically comes in an 8-pin SOIC (Small Outline Integrated Circuit) package.
Here is a brief overview of its pin functions:
1. LX (Pin 1): This is the inductor connection and switching node, where the inductor is connected to the internal MOSFET.
2. GND (Pin 2): Ground connection.
3. FB (Pin 3): Feedback input, used to set the output voltage.
4. SHDN (Pin 4): Shutdown pin, used to enable or disable the converter.
5. IN (Pin 5): Supply voltage input.
6. COMP (Pin 6): Compensation node for stabilizing the control loop with an external capacitor.
7. N.C. (No Connection) (Pin 7): Not used, typically left unconnected.
8. OUT (Pin 8): Output voltage pin.
These pins facilitate the IC's primary function as a voltage boost converter, suitable for battery-powered applications requiring efficient voltage regulation.
Here is a brief overview of its pin functions:
1. LX (Pin 1): This is the inductor connection and switching node, where the inductor is connected to the internal MOSFET.
2. GND (Pin 2): Ground connection.
3. FB (Pin 3): Feedback input, used to set the output voltage.
4. SHDN (Pin 4): Shutdown pin, used to enable or disable the converter.
5. IN (Pin 5): Supply voltage input.
6. COMP (Pin 6): Compensation node for stabilizing the control loop with an external capacitor.
7. N.C. (No Connection) (Pin 7): Not used, typically left unconnected.
8. OUT (Pin 8): Output voltage pin.
These pins facilitate the IC's primary function as a voltage boost converter, suitable for battery-powered applications requiring efficient voltage regulation.
Manufacturer
The MAX1681ESA is manufactured by Maxim Integrated, which is a company known for designing, manufacturing, and selling analog and mixed-signal integrated circuits. Maxim Integrated is a significant player in the semiconductor industry and provides innovative solutions for a wide range of applications, including automotive, industrial, healthcare, mobile consumer electronics, and many more. The company focuses on power management, battery management, interface, sensors, and other integrated solutions. In 2021, Maxim Integrated became a part of Analog Devices, Inc., further expanding its portfolio and capabilities in the semiconductor market.
Application
The MAX1681ESA is a voltage converter integrated circuit commonly used in applications requiring low-power, high-efficiency voltage inversion. Its primary application areas include battery-powered devices, such as portable electronics, where it can generate a negative voltage supply from a positive input. This makes it suitable for powering operational amplifiers or other analog components that require a dual supply. Additionally, the MAX1681ESA is used in sensor applications, LCD biasing, and small motor drivers. Its efficiency and compact form factor also make it ideal for space-constrained applications in consumer electronics, automotive electronics, and telecom equipment.
Package
The MAX1681ESA is available in an 8-pin small outline IC (SOIC) package.
