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ANALOGICTECH
ANALOGICTECH

AAT3190 Datasheet Preview

AAT3190 Datasheet

Positive/Negative Charge Pump for Voltage Bias

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AAT3190 pdf
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 an 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
3190.2005.03.1.0
1



ANALOGICTECH
ANALOGICTECH

AAT3190 Datasheet Preview

AAT3190 Datasheet

Positive/Negative Charge Pump for Voltage Bias

No Preview Available !

AAT3190 pdf
AAT3190
Positive/Negative Charge Pump for Voltage Bias
Pin Description
Pin #
MSOP-8
TSOPJW-12
15
Symbol
FBP
2 4 EN
3 3 REF
4 2 FBN
5 12 DVRP
6
8, 9, 10, 11
GND
7 7 DRVN
8 1 VIN
Function
Positive charge pump feedback input. Regulates to 1.2V
nominal. Connect feedback resistive divider to analog
ground (GND).
Enable input. When EN is pulled low, the device shuts off
and draws only 1.0µA. When high, it is in normal opera-
tion. Drive EN through an external resistor.
Internal reference bypass terminal. Connect a 0.1µF capac-
itor from this terminal to analog ground (GND). External
load capability to 50µA. REF is disabled in shutdown.
Negative charge pump regulator feedback input. Regulates
to 0V nominal. Connect feedback resistive divider to the
reference (REF).
Positive charge pump driver output. Output high level is VIN
and low level is PGND.
Ground.
Negative charge pump driver output. Output high level is
VIN and low level is PGND.
Input voltage: 2.7V to 5.5V.
Pin Configuration
MSOP-8
(Top View)
TSOPJW-12
(Top View)
FBP 1
EN 2
REF 3
FBN 4
8 VIN
7 DRVN
6 GND
5 DRVP
VIN
FBN
REF
EN
FBP
N/C
1
2
3
4
5
6
12 DRVP
11 GND
10 GND
9 GND
8 GND
7 DRVN
2 3190.2005.03.1.0


Part Number AAT3190
Description Positive/Negative Charge Pump for Voltage Bias
Maker ANALOGICTECH
Total Page 16 Pages
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