MAX1573
MAX1573
PRODUCTIONWhite LED 1x/1.5x Charge Pump in UCSP and Thin QFN
Smallest, Highest Efficiency White LED Charge Pump Packaged in a UCSP™
- Part Models
- 2
- 1ku List Price
- Starting From $3.33
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Overview
- Proprietary Adaptive 1x/1.5x Modes
- High Efficiency (PLEDs/PBATT), Up to 92%
- 0.2% LED Current Matching
- 28mA/LED Drive Capability
- Low Input Ripple and EMI
- Eliminates Ballast Resistors
- Logic or PWM Dimming Control
- Low 0.1µA Shutdown Current
- 2.7V to 5.5V Input Voltage Range
- Soft-Start Limits Inrush Current
- Output Overvoltage Protection
- Thermal Shutdown Protection
- No External Schottky Diode Required
- Tiny UCSP (2.1mm x 2.1mm x 0.6mm) and Thin QFN (4mm x 4mm) Packages
The MAX1573 fractional charge pump drives up to four white LEDs with regulated constant current for uniform intensity. By utilizing proprietary adaptive 1x/1.5x modes and ultra-low-dropout current regulators, it maintains the highest possible efficiency over the full 1-cell Li+ battery input voltage range. The 1MHz fixed-frequency switching allows for tiny external components and the regulation scheme is optimized to ensure low EMI and low input ripple.
An external resistor sets the full-scale LED current, while two digital inputs control on/off and select amongst three levels of brightness. A pulse-width modulation (PWM) signal can also be used to modulate LED brightness, requiring no additional components.
The MAX1573 is available in the tiny chip-scale UCSP™ (4 x 4 grid) and 16-pin thin QFN packages.
Applications
- Cell Phones/Smartphones
- MP3 Players
- Other Handhelds with Color Displays
- PDAs, Digital Cameras, and Camcorders
Documentation
Data Sheet 1
Design Note 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 |
|---|---|---|---|
| MAX1573ETE+ | 16-Lead TQFN (4mm x 4mm x 0.75mm) | ||
| MAX1573ETE+T | 16-Lead TQFN (4mm x 4mm x 0.75mm) |
This is the most up-to-date revision of the Data Sheet.
Software Resources
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Evaluation Kit for the MAX1573
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