MAX8834Y

Adaptive Step-Up Converters with 1.5A Flash Driver

1.5A White LED Flash Driver is Ideal for 5 Megapixel Camera Applications in Cell Phones


Please check latest availability status for a specific part variant.

Description

The MAX8834Y/MAX8834Z flash drivers integrate a 1.5A PWM DC-DC step-up converter and three programmable low-side, low-dropout LED current regulators. The step-up converter features an internal switching MOSFET and synchronous rectifier to improve efficiency and minimize external component count. An I²C interface provides flexible control of stepup converter output voltage setting, movie/flash mode selection, flash timer duration settings, and current regulator settings. The MAX8834Y/MAX8834Z operate down to 2.5V, making them future proof for new battery technologies.

The MAX8834Y/MAX8834Z consist of two current regulators for the flash/movie mode. Each current regulator can sink 750mA in flash mode and 125mA in movie mode. The MAX8834Y/MAX8834Z also integrate a 16mA low-current regulator that can be used to indicate camera status. The indicator current regulator includes programmable ramp and blink timer settings. A programmable input current limit, invoked using the GSMB control, reduces the total current drawn from the battery during PA transmit events. This ensures the flash current is set to the maximum possible for any given operating condition. Additionally, the MAX8834Y/MAX8834Z include a MAXFLASH function that adaptively reduces flash current during low battery conditions to help prevent system undervoltage lockup.

Other features include an optional NTC input for finger-burn protection and open/short LED detection. The MAX8834Y switches at 2MHz, providing best overall efficiency. The MAX8834Z switches at 4MHz, providing smallest overall solution size. The MAX8834Y/MAX8834Z are available in a 20-bump, 0.5mm pitch WLP package (2.5mm x 2.0mm).
MAX8834, MAX8834Y, MAX8834Z: Typical Operating Circuit MAX8834, MAX8834Y, MAX8834Z: Typical Operating Circuit Enlarge+

Key Features

  • 2.5V to 5.5V Operation Range
  • Step-Up DC-DC Converter
    • 1.5A Guaranteed Output Current
    • Adaptive or I²C Programmable Output Voltage
    • 2MHz and 4MHz Switching Frequency Options
  • Two Flash/Movie LED Current Regulators
    • I²C Programmable Flash and Movie Current
    • Low-Dropout Voltage (110mV max) at 500mA
  • LED Indicator Current Regulator
    • I²C Programmable Output Current
    • Ramp and Blink Timers for Indicator Mode
    • Low-Dropout Voltage (130mV max) at 16mA
  • I²C Programmable Safety and Watchdog Timers
  • GSM Blank Logic Input
  • MAXFLASH System Lockup Protection
  • Remote Temperature Sensor Input
  • Open/Short LED Detection
  • Thermal Shutdown Protection
  • < 1µA Shutdown Current
  • 20-Bump, 0.5mm Pitch, 2.5mm x 2.0mm WLP

Applications/Uses

  • Cell Phones and Smart Phones
  • PDAs, Digital Cameras, and Camcorders
Part NumberBattery InputRegulation TopologyMax. No. of LEDsLED ChannelsLED ConfigurationILED per Channel
(A)
Dimming RatioDimming ControlPOUT
(W)
VIN
(V)
VIN
(V)
ICC
(mA)
LED String Volt.
(V)
Oper. Freq.
(kHz)
Package/PinsBudgetary
Price
maxmaxminmaxmaxmaxSee Notes
MAX8834Y 1-Cell Li+Inductor Based33Parallel0.7530
Digital
I2C Serial
62.55.50.65.52000
WLP/20
$1.77 @1k
See All LED Drivers (77)
Pricing Notes:
This pricing is BUDGETARY, for comparing similar parts. Prices are in U.S. dollars and subject to change. Quantity pricing may vary substantially and international prices may differ due to local duties, taxes, fees, and exchange rates. For volume-specific and version-specific prices and delivery, please see the price and availability page or contact an authorized distributor.


MAX8834YEVKIT: Evaluation Kit for the MAX8834Y/MAX8834Z

Quality and Environmental Data

Request Reliability Report for: MAX8834Y 
Lead-Free Package Tin (Sn) Whisker Reports

Additional Resources


How Medical Wearables Enhance Quality of Life


Device   Fab Process   Technology   Sample size   Rejects   FIT at 25°C   FIT at 55°C  

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.

Quality Management System >
Environmental Management System >

Related Resources


MAX20092
12-Switch Matrix Manager for Automotive Lighting

  • Automotive Ready: AEC-Q100 Qualified
  • Flexible Configuration Allows the Use of the Same Device in Different Applications
  • Optimal PWM Dimming Arrangement Provides Excellent Dimming Performance

MAX20050
2A Synchronous Buck LED Drivers with Integrated MOSFETs

  • Fully Synchronous 2A Step-Down Converter with Integrated 0.14Ω (typ) MOSFETs
  • Wide 4.5V to 65V Input Supply Range
  • Two Switching Frequency Options: 400kHz and 2.1MHz

MAX20051
2A Synchronous Buck LED Drivers with Integrated MOSFETs

  • Fully Synchronous 2A Step-Down Converter with Integrated 0.14Ω (typ) MOSFETs
  • Wide 4.5V to 65V Input Supply Range
  • Two Switching Frequency Options: 400kHz and 2.1MHz

MAX20052
2A Synchronous Buck LED Drivers with Integrated MOSFETs

  • Fully Synchronous 2A Step-Down Converter with Integrated 0.14Ω (typ) MOSFETs
  • Wide 4.5V to 65V Input Supply Range
  • Two Switching Frequency Options: 400kHz and 2.1MHz

MAX20053
2A Synchronous Buck LED Drivers with Integrated MOSFETs

  • Fully Synchronous 2A Step-Down Converter with Integrated 0.14Ω (typ) MOSFETs
  • Wide 4.5V to 65V Input Supply Range
  • Two Switching Frequency Options: 400kHz and 2.1MHz

MAX20069
Automotive I2C-Controlled 4-Channel 150mA Backlight Driver and 4-Output TFT-LCD Bias

  • 4-Output TFT-LCD Bias Power
  • 4-Channel LED Backlight Driver
  • Low EMI

MAX20444
Automotive 4-Channel 130mA Backlight Driver with Boost/SEPIC Controller and I2C Interface

  • Wide-Voltage-Range Operation
  • High Integration
  • Robust and Low EMI