MAX1681
MAX1681
PRODUCTION125mA, Frequency-Selectable, Switched-Capacitor Voltage Converters
Up to 1MHz Switching Frequency Allows Small Capacitors
- Part Models
- 2
- 1ku List Price
- Starting From $4.09
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Overview
- Selectable Switching Frequencies:
- 125kHz/250kHz (MAX1680)
- 500kHz/1MHz (MAX1681)
- 125kHz/250kHz (MAX1680)
- Allow Use of Small Capacitors (1µF for the MAX1681)
- 125mA Output Current
- 3.5Ω Output Impedance
- 1µA Logic-Controlled Shutdown
- Configurable as Voltage Inverters or Doublers
- +2.0V to +5.5V Input Voltage Range
- Available in 8-Pin SO Packages
- 90% Efficiency
The MAX1680/MAX1681 inductorless switched-capacitor voltage converters either invert an input voltage of +2.0V to +5.5V or double it while supplying up to 125mA output current. They have a selectable-frequency option that allows the use of small capacitors: 4.7µF (MAX1680), 1µF (MAX1681). With their high output current capability, these charge-pump devices are suitable replacements for inductor-based regulators, which require more expensive external components and additional board space.
The devices' equivalent output resistance (typically 3.5Ω) allows them to deliver as much as 125mA with only a 440mV drop. A shutdown feature reduces quiescent current to less than 1µA. The MAX1680/MAX1681 are available in 8-pin SO packages. For devices that deliver up to 50mA in smaller µMAX® packages, refer to the MAX860/MAX861 data sheet.
Applications
- Interface Power Supplies
- Local Negative Supplies
- MOSFET Bias
- Op-Amp Power Supplies
Documentation
Data Sheet 1
Design Note 3
Technical Articles 3
ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal. View our quality and reliability program and certifications for more information.
| Part Model | Pin/Package Drawing | Documentation | CAD Symbols, Footprints, and 3D Models |
|---|---|---|---|
| MAX1681ESA+ | Small-Outline IC Narrow (0.15in) | ||
| MAX1681ESA+T | Small-Outline IC Narrow (0.15in) |
| Part Models | Product Lifecycle | PCN |
|---|---|---|
|
Jun 2, 2023 - 2361E WAFER FAB |
||
| MAX1681ESA+ | PRODUCTION | |
| MAX1681ESA+T | PRODUCTION | |
|
Oct 30, 2020 - 1702R2 ASSEMBLY |
||
| MAX1681ESA+ | PRODUCTION | |
| MAX1681ESA+T | PRODUCTION | |
|
Apr 20, 2026 - 2571A PIN/ERRATA |
||
| MAX1681ESA+T | PRODUCTION | |
This is the most up-to-date revision of the Data Sheet.
Software Resources
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| Parts | Product Life Cycle | Description |
|---|---|---|
| Charge Pumps 1 | ||
| MAX860 | PRODUCTION | 50mA, Frequency-Selectable, Switched-Capacitor Voltage Converters |