MAX1570
MAX1570
PRODUCTIONWhite LED Current Regulator with 1x/1.5x High-Efficiency Charge Pump
- Part Models
- 2
- 1ku List Price
- Starting From $3.44
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Overview
- Excellent 0.3% LED-to-LED Current Matching
- 30mA/LED Drive Capability
- Proprietary 1x/1.5x Modes for Ultra-High Efficiency
- Low Input Ripple and EMI
- Eliminates Ballast Resistors
- Digital or PWM LED Dimming Control
- 0.1µA Shutdown Current
- 2.7V to 5.5V Supply Voltage Range
- Soft-Start Limits Inrush Current
- Thermal-Shutdown Protection
- No External Inductor, Schottky, or Zener Diode Required
- Tiny 16-Pin 4mm x 4mm Thin QFN Package
The MAX1570 fractional charge pump drives up to five white LEDs with regulated constant current for uniform intensity. The MAX1570 maintains the highest possible efficiency over the full 1-cell lithium-ion (Li+) battery input voltage range by utilizing a 1x/1.5x fractional charge pump and very-low-dropout current regulators. The MAX1570 operates with 1MHz fixed-frequency switching, allowing for tiny external components. 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 between three levels of brightness. A pulse-width modulation (PWM) signal can also be used to modulate LED brightness.
The MAX1570 is available in 16-pin 4mm x 4mm Thin QFN packaging (0.8mm max height).
Applications
- Cell Phones/Smartphones
- Digital Cameras and Camcorders
- PDAs and Palmtop Computers
- Portable MP3 Players
- White LED Backlighting
Documentation
Data Sheet 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 |
|---|---|---|---|
| MAX1570ETE+ | 16-Lead TQFN (4mm x 4mm x 0.75mm) | ||
| MAX1570ETE+T | 16-Lead TQFN (4mm x 4mm x 0.75mm) |
| Part Models | Product Lifecycle | PCN |
|---|---|---|
|
Jun 20, 2016 - 1612 ASSEMBLY |
||
| MAX1570ETE+ | PRODUCTION | |
| MAX1570ETE+T | PRODUCTION | |
This is the most up-to-date revision of the Data Sheet.
Software Resources
Can't find the software or driver you need?
Request a Driver/SoftwareHardware Ecosystem
| Parts | Product Life Cycle | Description |
|---|---|---|
| Charge Pumps 1 | ||
| MAX1595 | PRODUCTION | Regulated 3.3V/5.0V Step-Up/Step-Down Charge Pump |
| LED Drivers 4 | ||
| MAX1912 | Obsolete | 1.5x/2x High-Efficiency White LED Charge Pumps |
| MAX1848 | PRODUCTION | White LED Step-Up Converter in SOT23 |
| MAX1916 | PRODUCTION | Low-Dropout, Constant-Current Triple White LED Bias Supply |
| MAX1910 | PRODUCTION | 1.5x/2x High-Efficiency White LED Charge Pumps |
Evaluation Kits
Evaluation Kit for the MAX1570
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