MAX8595

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High-Efficiency, 36V Step-Up Converters with TA Derating Option for 2 to 9 White LEDs

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Overview

  • Up to Nine LEDs at 25mA
  • Temperature Derating Function to Allow Fewer LEDs for Same Light (MAX8596X)
  • 86% Efficiency (PLEDs / PIN)
  • 1.7% Current-Regulation Accuracy
  • Output Overvoltage Protection
  • Flexible Dimming Control
    • Analog
    • Direct-PWM Internal Filter
  • 1MHz PWM Switching Frequency
  • 0.1µF Output Capacitor
  • 12mVP-P Low Input Ripple
  • Soft-Start Eliminates Inrush Current
  • 2.6V to 6V Input Range
  • 0.3µA Shutdown Current
  • Pin Compatible with the MAX1561 and MAX1599
  • TDFN 3mm x 3mm x 0.8mm Package with Exposed Paddle

The MAX8595X/MAX8596X drive up to nine white LEDs with constant current and high efficiency to provide LCD backlighting in cell phones, PDAs, and other handheld devices. The series connection allows the LED currents to be identical for uniform brightness and minimizes the number of traces to the LEDs. The MAX8595X regulates constant LED current over the entire temperature range. The MAX8596X features an ambient-temperature derating function to avoid over-driving the white LEDs during high ambient temperatures, enabling higher drive current below +42°C.

A single Dual Mode™ input provides a simple means of brightness adjustment and on/off control. Fast 1MHz current-mode PWM operation allows for small input and output capacitors and a small inductor while minimizing ripple on the input supply/battery. Soft-start eliminates inrush current during startup.

The MAX8595X/MAX8596X are available in a space-saving, 8-pin, 3mm x 3mm TDFN package.

Applications

  • Cell Phones/Smartphones
  • e-Books and Subnotebooks
  • PDAs, Palmtops, and Wireless Handhelds
  • White LED Display Backlighting

MAX8595
High-Efficiency, 36V Step-Up Converters with TA Derating Option for 2 to 9 White LEDs
MAX8595X, MAX8596X: Typical Operating Circuit
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Software Resources

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Hardware Ecosystem

Parts Product Life Cycle Description
LED Drivers 10
MAX1561 PRODUCTION High-Efficiency, 26V Step-Up Converters for Two to Six White LEDs
MAX1599 PRODUCTION High-Efficiency, 26V Step-Up Converters for Two to Six White LEDs
MAX1582 High-Efficiency Step-Up Converters for White LED Main and Subdisplay Backlighting
MAX1570 PRODUCTION White LED Current Regulator with 1x/1.5x High-Efficiency Charge Pump
MAX1573 PRODUCTION White LED 1x/1.5x Charge Pump in UCSP and Thin QFN
MAX1574 PRODUCTION 180mA, 1x/2x, White LED Charge Pump in 3mm x 3mm TDFN
MAX1575 White LED 1x/1.5x Charge Pump for Main and Sub-Displays
MAX1910 PRODUCTION 1.5x/2x High-Efficiency White LED Charge Pumps
MAX1916 PRODUCTION Low-Dropout, Constant-Current Triple White LED Bias Supply
MAX1912 1.5x/2x High-Efficiency White LED Charge Pumps
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