MAX20070, MAX20070B

Integrated TFT Power Supply and LED Backlight Drivers

Integrated TFT Power Supplies and LED Backlight Driver Reduce System Component Count

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The MAX20070/MAX20070B are highly integrated power supplies and LED backlight drivers for automotive TFT-LCD applications. The devices integrate one buck-boost converter, one boost converter, two gate-driver supplies, and a boost/SEPIC converter that can power one to two strings of LEDs in the display backlight.

The source-driver power supplies consist of a boost converter and an inverting buck-boost converter that can generate voltages up to +15V and -15V. Both source-driver power supplies can deliver up to 100mA. The positive source-driver supply regulation voltage (VPOS) is set by connecting an external resistor-divider on FBP. Connecting the FBP pin to ground sets the regulation voltage (VPOS) to +6.5V. The negative source-driver supply voltage (VNEG) is always tightly regulated to -VPOS within ±50mV. The source-driver supplies use an input voltage from 2.7V to 5.5V to generate the output voltages.

The gate-driver power supplies consist of regulated charge pumps that generate up to +22V and -22V and can deliver up to 3mA each. The regulation voltage (VGVDD) on the positive charge pump is set by a resistor-divider on FBPG; the regulation voltage (VGVEE) on the negative charge pump is set by a resistor-divider on FBNG.

The ICs feature a dual-string LED driver that operates off a separate input voltage (VBATT) and can power up to two strings of LEDs with 160mA (max) of current per string.

The startup and shutdown sequences for all power domains is controlled using one of the seven preset modes that are selectable through a resistor on SEQ.

The MAX20070/MAX20070B are available in a 32-pin, 5mm × 5mm TQFN package with an exposed pad, and operates over the -40°C to +105°C ambient temperature range.
MAX20070, MAX20070B: Simplified Operating Circuit MAX20070, MAX20070B:Simplified Operating Circuit Enlarge+

Key Features

  • Integrates Both TFT Power Supplies and LED Backlight Driver in One IC, Reducing Component Count
  • Alleviates EMI Due to Spread Spectrum on Both Source Driver Supplies and LED Driver
  • 10000:1 Dimming Ratio at 200Hz Dimming Frequency
  • Available in a 32-Pin (5mm × 5mm) TQFN with an Exposed Pad for Heat Dissipation and Operates Over the -40°C to +105°C Ambient Temperature Range


  • Automotive Central Information Displays
  • Automotive Dashboards
  • Automotive Head-Up Displays
  • Automotive Navigation System
Part NumberRegulation TopologyMax. No. of LEDsLED ChannelsLED ConfigurationILED per Channel
PWM Dimming Freq.
Dimming RatioDimming ControlPOUT
LED String Volt.
Oper. Freq.
maxmaxmaxminmaxmaxmaxSee Notes
MAX20070 Inductor Based242Series-Parallel0.162010000PWM122.75.52.2521000
See Data Sheet
$4.65 @1k
MAX20070B 2100
See All LED Drivers (79)

Part NumberPrimary TopologyMonitor/Control FeaturesDC-DC/Power FeaturesLCD/LED/Flash/CCD FeaturesVIN
Inverting OutputsPackage/Pins
Dynamic V Adj.
Output OVP
Output UVP
Reset Output
Current Limit
Fixed Freq./PWM
Internal Switch
Soft Start
TFT Bias
White LED
See All Multifunction PMICs (83)
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.

MAX20070EVKIT: Evaluation Kit for the MAX20070/MAX20070B

Quality and Environmental Data

Request Reliability Report for: MAX20070  MAX20070B 
Lead-Free Package Tin (Sn) Whisker Reports
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.

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