Click here to ask about the production status of specific part numbers.
MAX25220/MAX25221/
MAX25221B
Automotive 4-Channel TFT-LCD Power Supply
with VCOM Buffer
General Description
Benefits and Features
The MAX25220/MAX25221/MAX25221B are 4-channel
TFT-LCD power ICs that provide symmetrical positive
● High Integration
• Synchronous Boost Provides AVDD of 4.2V to
10.5V at up to 200mA
AVDD and negative NAVDD supplies as well as VG
ON
and VG
gate supplies. In addition, a VCOM buffer with
• NAVDD Inverter Output at up to -200mA
OFF
output voltage range above and below ground and a tem-
• 15mA VG
Output (7.6V to 20.2V) from 3x
ON
perature measurement block are integrated (MAX25221/
B).
Regulated Charge Pump
• VG
(-18.2V to -5.6V) from Regulated Charge
OFF
Pump at up to -15mA (charge-pump doubler)
• Controlled Sequencing during Power-On and
Power-Off of All Rails
• VCOM Output Range +1V to -2.49V in 6.83mV
Steps (MAX25221)
• NTC Input for Temperature Measurement/
Compensation (MAX25221)
The devices contain non-volatile memory so that the val-
ues of all outputs can be calibrated for the lifetime of the
device (maximum five times).
2
Programming is carried out using the built-in I C interface,
which can also be used to read back diagnostic informa-
tion. A stand-alone mode is also available.
The temperature sensor interface block measures the
temperature optionally allowing the VCOM output voltage
to be adjusted depending on the measured temperature.
● Low EMI
• 420kHz/2.1MHz Switching Frequency with Spread
Spectrum
The MAX25220/MAX25221/MAX25221B are available in
a TQFN package and operate in the -40 to 125°C temper-
ature range.
2
● I C Control/Diagnostic Interface with FLTB (Interrupt)
Output
• UV diagnostics on All Outputs
● Versatile
Applications
• Non-Volatile Output Voltage Settings on AVDD/
● Infotainment Displays
● Central Information Displays
● Instrument Clusters
NAVDD, VG , VG
, VCOM, and Sequencing
ON
OFF
• Supports Stand-Alone Operation Mode after
Programming
• Compact 5mm x 5mm TQFN32 Package
● AECQ100 Grade 1
Ordering Information appears at end of datasheet.
19-100803; Rev 4; 11/20