AAT3190 データシートの表示（PDF） - Advanced Analogic Technologies
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AAT3190 Datasheet PDF : 16 Pages
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AAT3190
Positive/Negative Charge Pump for Voltage Bias
General Description
The AAT3190 charge pump controller provides the
regulated positive and negative voltage biases
required by active matrix thin-film transistor (TFT)
liquid-crystal displays (LCDs), charge-coupled
device (CCD) sensors, and organic light emitting
diodes (OLEDs). Two low-power charge pumps
convert input supply voltages ranging from 2.7V to
5.5V into two independent output voltages.
The dual low-power charge pumps independently
regulate a positive (VPOS) and negative (VNEG) out-
put voltage. These outputs use external diode and
capacitor multiplier stages (as many stages as
required) to regulate output voltages up to ±25V.
Built-in soft-start circuitry prevents excessive in-
rush current during start-up. A high switching fre-
quency enables the use of small external capaci-
tors. The device’s shutdown feature disconnects
the load from VIN and reduces quiescent current to
less than 1.0µA.
The AAT3190 is available in a Pb-free MSOP-8 or
TSOPJW-12 package and is specified over the
-40°C to +85°C operating temperature range.
Features
ChargePump™
• VIN Range: 2.7V to 5.5V
• Adjustable ± Dual Charge Pump
• Positive Supply Output Up to +25V
• Negative Supply Output Down to -25V
• Up to 30mA Output Current
• 1.0MHz Switching Frequency
• <1.0µA Shutdown Current
• Internal Power MOSFETs
• Internally Controlled Soft Start
• Fast Transient Response
• Ultra-Thin Solution (No Inductors)
• -40°C to +85°C Temperature Range
• Available in 8-Pin MSOP or 12-Pin TSOPJW
Package
Applications
• CCD Sensor Voltage Bias
• OLEDs
• Passive-Matrix Displays
• Personal Digital Assistants (PDAs)
• TFT Active-Matrix LCDs
Typical Application
INPUT
EN
NEGATIVE
OUTPUT
IN
EN
DRVN
AAT3190
FBN
DRVP
REF
FBP
GND
POSTIVE
OUTPUT
3190.2006.01.1.2
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