MAX1721
MAX1721
PRODUCTIONSOT23, Switched-Capacitor Voltage Inverters with Shutdown
Smallest, High-Efficiency Bias for Small LCD/GaAsFET PA Bias: Small Cap Size, No Inductors and Low Supply Current
- Part Models
- 2
- 1ku List Price
- Starting From $1.14
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Overview
- 1nA Logic-Controlled Shutdown
- 6-Pin SOT23 Package
- 99.9% Voltage Conversion Efficiency
- 50µA Quiescent Current (MAX1720)
- +1.5V to +5.5V Input Voltage Range
- 25mA Output Current
- Requires Only Two 1µF Capacitors (MAX1719/MAX1721)
The ultra-small MAX1719/MAX1720/MAX1721 monolithic, CMOS charge-pump inverters accept input voltages ranging from +1.5V to +5.5V. The MAX1720 operates at 12kHz, and the MAX1719/MAX1721 operate at 125kHz. High efficiency, small external components, and logic-controlled shutdown make these devices ideal for both battery-powered and board-level voltage conversion applications.
Oscillator control circuitry and four power MOSFET switches are included on-chip. A typical MAX1719/MAX1720/MAX1721 application is generating a -5V supply from a +5V logic supply to power analog circuitry. All three parts come in a 6-pin SOT23 package and can deliver a continuous 25mA output current.
For pin-compatible SOT23 switched-capacitor voltage inverters without shutdown (5-pin SOT23), see the MAX828/MAX829 and MAX870/MAX871 data sheets. For applications requiring more power, the MAX860/MAX861 deliver up to 50mA. For regulated outputs (up to -2 x VIN), refer to the MAX868. The MAX860/MAX861 and MAX868 are available in space-saving µMAX® packages.
Applications
- Battery-Powered Applications
- GaAs PA Bias Supply
- Handy-Terminals, PDAs
- Local Negative Supply from a Positive Supply
- Small LCD Panels
Documentation
Data Sheet 1
Technical Articles 1
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 |
|---|---|---|---|
| MAX1721EUT+ | SOT_23 | ||
| MAX1721EUT+T | SOT_23 |
| Part Models | Product Lifecycle | PCN |
|---|---|---|
|
Jun 2, 2023 - 2361E WAFER FAB |
||
| MAX1721EUT+ | PRODUCTION | |
| MAX1721EUT+T | PRODUCTION | |
|
Feb 4, 2015 - 1341_CANCELLATION ASSEMBLY |
||
| MAX1721EUT+ | PRODUCTION | |
| MAX1721EUT+T | PRODUCTION | |
|
Apr 20, 2026 - 2571C PIN/ERRATA |
||
| MAX1721EUT+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 4 | ||
| MAX860 | PRODUCTION | 50mA, Frequency-Selectable, Switched-Capacitor Voltage Converters |
| MAX828 | PRODUCTION | Switched-Capacitor Voltage Inverters |
| MAX870 | PRODUCTION | Switched-Capacitor Voltage Inverters |
| MAX868 | PRODUCTION | Regulated, Adjustable -2x Inverting Charge Pump |
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