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AAT - Triple-Output Charge Pump Regulator

Numéro de référence AAT2820
Description Triple-Output Charge Pump Regulator
Fabricant AAT 
Logo AAT 





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AAT2820 fiche technique
AAT2820
Triple-Output Charge Pump Regulator
General Description
Features
ChargePump
The AAT2820 is a member of AnalogicTech's Total
Power Management IC™ (TPMIC™) product fam-
• VIN Range: 2.7V to 5.5V
• 5V Regulated Output Voltage
ily. It is a triple output charge pump targeted for
• Two Adjustable Regulated Output Voltages:
active matrix thin-film transistor (TFT), liquid crys-
tal displays (LCDs), and CCD camera bias for sys-
VPOS and VNEG
— Positive Charge Pump Up to +25V
tems operating with lithium-ion/polymer batteries.
— Negative Charge Pump Down to -25V
The device generates three regulated output volt-
— Optional Power-Up Sequence with
ages for turn-on gate drive bias (VPOS), turn-off
gate voltage bias (VNEG), and logic voltage.
The VPOS and VNEG output voltages are independ-
ently regulated. Both outputs use external diode
and capacitor multiplier stages (as many stages as
required) to regulate output voltages up to +25V
and -25V. An additional regulated output voltage is
provided for biasing the display module. Built-in
AAT2820-1
• Internal Power MOSFETs
• <1µA of Shutdown Current
• Internally Controlled Soft Start
• Fast Transient Response
• Ultra-Thin Solution (No Inductors)
• 16-Pin TDFN44 Package
• Temperature Range: -40°C to +85°C
soft-start circuitry prevents excessive inrush current
during start-up. A high switching frequency enables
the use of very small external capacitors. A low
shutdown feature disconnects the load from VIN and
reduces quiescent current to less than 0.1µA.
Applications
• CCD Cameras
The
AAT2820
is
available
in
a
Pb-free
TDFN44-16
www.DataSheet4U.com
Hand-Held Instruments
package and is specified over the -40°C to +85°C
• Passive-Matrix Displays
operating temperature range.
• Personal Digital Assistants (PDAs)
• TFT Active-Matrix LCDs
Typical Application
CFLY
C+ C-
VIN IN EN
CIN
EN/PN
DRVN
OUT
AAT2820
COUT
Enable
Enable (Positive and
Negative Output)
VOUT
VNEG
FBN
REF
DRVP
GND FBP
VPOS
2820.2006.04.1.4
1

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