MAX8595Z

High-Efficiency, 32V Step-Up Converters with TA Derating Option for 2 to 8 White LEDs

High-Efficiency, 32V Step-Up Converters with Temperature Derating Option for 2 to 8 White LEDs


Please check latest availability status for a specific part variant.

Description

The MAX8595Z/MAX8596Z drive up to 8 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 MAX8595Z regulates constant LED current over the entire temperature range. The MAX8596Z features an ambient-temperature derating function to avoid overdriving 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 MAX8595Z/MAX8596Z are available in a space-saving, 8-pin 3mm x 3mm TDFN package.

MAX8595Z, MAX8596Z: Typical Operating Circuit MAX8595Z, MAX8596Z: Typical Operating Circuit Enlarge+

Key Features

  • Up to 8 LEDs at 25mA
  • Temperature Derating Function to Allow Fewer LEDs for Same Light (MAX8596Z)
  • 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 5.5V Input Range
  • 0.3µA Shutdown Current
  • Pin Compatible with the MAX1561 and MAX1599
  • TDFN 3mm x 3mm x 0.8mm Package with Exposed Paddle
  • Applications/Uses

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

    MAX8596ZEVKIT: Evaluation Kit for the MAX8595X, MAX8595Z, MAX8596X, MAX8596Z
    Request Reliability Report for: MAX8595Z 
    Device   Fab Process   Technology   Sample size   Rejects   FIT at 25°C   FIT at 55°C   Material Composition  

    Note : The failure rates are summarized by technology and mapped to the associated material part numbers. The failure rates are highly dependent on the number of units tested.

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