MAX1947 (5)
The MAX1947 is available from Analog Devices at Xecor. Designed for low input/output voltage step-up DC-DC conversion, the MAX1947 offers high efficiency (up to 94%), low operating supply current (70µA), and internal synchronous rectification. Available in 8-WDFN Exposed Pad packaging, it is ideal for battery-powered systems such as cordless phones, digital still cameras, MP3 players, and portable medical equipment. Whether used in wireless peripherals, PDAs, or other portable devices, this series ensures reliable performance, extended battery life, and compact design for demanding applications. Xecor is an authorized distributor for Analog Devices. Please view our extensive selection of the MAX1947 series below.
| Part Number | Description | Package | Inventory | Add To Bom |
|---|---|---|---|---|
| MAX1947ETA30+T | up DC-DC converter, Single output, 3V, 0.361A | TDFN-8 | 2,293 | |
| MAX1947ETA30+ | Conv DC-DC 0.7V to 3.6V Step Up Single-Out 3V 0.361A 8-Pin TDFN EP T/R | TDFN EP-8 | 6,182 | |
| MAX1947ETA25+T | Conv DC-DC 0.7V to 3.6V Step Up Single-Out 2.5V 0.38A 8-Pin TDFN EP T/R | TDFN EP-8 | 5,320 | |
| MAX1947ETA33+ | Conv DC-DC 0.7V to 3.6V Step Up Single-Out 3.3V 0.329A 8-Pin TDFN EP T/R | TDFN EP-8 | 7,392 | |
| MAX1947ETA33+T | Step-up DC-DC converter for low input/output voltage with active-low RESET | TDFN-8 | 4,948 |
Key Featrues
Low Input Voltage Capability (0.7V): This feature allows the MAX1947 to operate efficiently from very low input voltages, making it ideal for battery-powered systems with low cell counts, such as single or dual-cell alkaline/NiMH/NiCd batteries. This enhances the device's versatility in portable applications.
Internal Synchronous Rectifier: The integrated synchronous rectifier eliminates the need for an external Schottky diode, reducing component count and board space. This also contributes to achieving high efficiency (up to 94%), improving overall system performance and battery life.
High Switching Frequency (Up to 2MHz): The high switching frequency enables the use of smaller external components, such as inductors and capacitors, reducing the overall footprint of the design. Additionally, it results in lower output ripple, enhancing the stability and performance of the power supply.
Automatic Pulse Skipping at Light Loads: This feature optimizes efficiency during light load conditions by skipping unnecessary switching pulses, significantly extending battery life in low-power or standby modes. It is particularly beneficial for applications with varying power demands.
True Shutdown Functionality: The true shutdown feature fully discharges the output to ground when the device is turned off, preventing residual voltage from affecting the system. This ensures a clean shutdown state, which is critical for safety and power management in portable and medical devices.
Internal Synchronous Rectifier: The integrated synchronous rectifier eliminates the need for an external Schottky diode, reducing component count and board space. This also contributes to achieving high efficiency (up to 94%), improving overall system performance and battery life.
High Switching Frequency (Up to 2MHz): The high switching frequency enables the use of smaller external components, such as inductors and capacitors, reducing the overall footprint of the design. Additionally, it results in lower output ripple, enhancing the stability and performance of the power supply.
Automatic Pulse Skipping at Light Loads: This feature optimizes efficiency during light load conditions by skipping unnecessary switching pulses, significantly extending battery life in low-power or standby modes. It is particularly beneficial for applications with varying power demands.
True Shutdown Functionality: The true shutdown feature fully discharges the output to ground when the device is turned off, preventing residual voltage from affecting the system. This ensures a clean shutdown state, which is critical for safety and power management in portable and medical devices.
Applications
Portable Medical Equipment: The MAX1947 is ideal for powering portable medical devices such as glucose meters, pulse oximeters, and portable ECG monitors. Its low input voltage capability (down to 0.7V) and high efficiency (up to 94%) ensure reliable operation from single-cell batteries, while its compact design and low quiescent current make it suitable for space-constrained and power-sensitive medical applications.
Wireless Mice/Keyboards: The MAX1947 is perfect for powering wireless peripherals like mice and keyboards. Its ability to operate from low input voltages (0.7V to 3.6V) and provide stable 3.3V output ensures compatibility with a wide range of battery types, while its high efficiency and low quiescent current extend battery life, making it ideal for consumer electronics.
Digital Still Cameras: The MAX1947 is well-suited for digital cameras, where it can efficiently step up battery voltage to power the camera's core components, such as the image sensor, processor, and display. Its high switching frequency (up to 2MHz) allows for the use of small external components, reducing the overall size and weight of the camera, which is critical for portable devices.
Cordless Phones: The MAX1947 is an excellent choice for cordless phones, providing a stable 3.3V output to power the phone's microcontroller, RF module, and display. Its ability to operate from low input voltages and its high efficiency make it ideal for extending battery life in cordless phone systems, ensuring reliable communication even in low-power conditions.
Wireless Mice/Keyboards: The MAX1947 is perfect for powering wireless peripherals like mice and keyboards. Its ability to operate from low input voltages (0.7V to 3.6V) and provide stable 3.3V output ensures compatibility with a wide range of battery types, while its high efficiency and low quiescent current extend battery life, making it ideal for consumer electronics.
Digital Still Cameras: The MAX1947 is well-suited for digital cameras, where it can efficiently step up battery voltage to power the camera's core components, such as the image sensor, processor, and display. Its high switching frequency (up to 2MHz) allows for the use of small external components, reducing the overall size and weight of the camera, which is critical for portable devices.
Cordless Phones: The MAX1947 is an excellent choice for cordless phones, providing a stable 3.3V output to power the phone's microcontroller, RF module, and display. Its ability to operate from low input voltages and its high efficiency make it ideal for extending battery life in cordless phone systems, ensuring reliable communication even in low-power conditions.
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