MAX1673
MAX1673
PRODUCTIONRegulated, 125mA Output, Charge Pump DC-DC Inverter
Flexible Control Scheme -Fixed Frequency or Low Quiescent Current Modes
- Part Models
- 2
- 1ku List Price
- Starting From $3.52
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Overview
- Regulated Negative Output Voltage (up to -1 x VIN)
- 125mA Output Current
- 35µA Quiescent Supply Current (Skip-mode regulation)
- 350kHz Fixed-Frequency, Low-Noise Output (Linear-mode regulation)
- 2V to 5.5V Input Range
- 1µA Logic-Controlled Shutdown
The MAX1673 charge-pump inverter provides a low-cost, compact means of generating a regulated negative output from a positive input at up to 125mA. It requires only three small capacitors, and only two resistors to set its output voltage. The input range is 2V to 5.5V. The regulated output can be set from 0V to -VIN in Skip regulation mode or -1.5V to -VIN in Linear (LIN) regulation mode.
In Skip mode, the MAX1673 regulates by varying its switching frequency as a function of load current. This On-Demand™ switching gives the MAX1673 two advantages: very small capacitors and very low quiescent supply current. At heavy loads, it transfers energy from the input to the output by switching at up to 350kHz. It switches more slowly at light loads, using only 35µA quiescent supply current.
In Linear mode, the MAX1673 switches at a constant 350kHz at all loads and regulates by controlling the current-path resistance. This provides constant-frequency ripple, which is easily filtered for low-noise applications.
This device also features a 1µA logic-controlled shutdown mode and is available in a standard 8-pin SO package. For a device that delivers about 10mA and fits in a smaller package, refer to the MAX868.
Applications
- Analog Signal Processing
- Camcorders
- Digital Still Cameras
- Hard Disk Drive
- Measurement Instrumentation
- Modems
Documentation
Data Sheet 1
Design Note 1
Technical Articles 2
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 |
|---|---|---|---|
| MAX1673ESA+ | Small-Outline IC Narrow (0.15in) | ||
| MAX1673ESA+T | Small-Outline IC Narrow (0.15in) |
| Part Models | Product Lifecycle | PCN |
|---|---|---|
|
Oct 30, 2020 - 1702R2 ASSEMBLY |
||
| MAX1673ESA+ | PRODUCTION | |
| MAX1673ESA+T | PRODUCTION | |
|
Apr 20, 2026 - 2571A PIN/ERRATA |
||
| MAX1673ESA+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 | ||
| MAX868 | PRODUCTION | Regulated, Adjustable -2x Inverting Charge Pump |
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