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 (V
POS
) and negative (V
NEG
) 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 V
IN
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
™
V
IN
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
IN
EN
EN
DRVN
AAT3190
DRVP
NEGATIVE
OUTPUT
FBN
REF
FBP
GND
POSTIVE
OUTPUT
3190.2006.01.1.2
1
AAT3190
Positive/Negative Charge Pump for Voltage Bias
Pin Description
Pin #
MSOP-8
TSOPJW-12
Symbol
FBP
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 V
IN
and low level is PGND.
Ground.
Negative charge pump driver output. Output high level is
V
IN
and low level is PGND.
Input voltage: 2.7V to 5.5V.
1
5
2
4
EN
3
3
REF
4
2
FBN
5
6
7
8
12
8, 9, 10, 11
7
1
DRVP
GND
DRVN
VIN
Pin Configuration
MSOP-8
(Top View)
TSOPJW-12
(Top View)
FBP
EN
REF
FBN
1
8
VIN
DRVN
GND
DRVP
2
7
3
6
4
5
VIN
FBN
REF
EN
FBP
N/C
1
2
3
4
5
6
12
11
10
9
8
7
DRVP
GND
GND
GND
GND
DRVN
1
2
2
3190.2006.01.1.2
AAT3190
Positive/Negative Charge Pump for Voltage Bias
Absolute Maximum Ratings
1
Symbol
V
IN
V
EN
V
N_CH
V
P_CH
Other Inputs
I
MAX
T
J
T
LEAD
Description
Input Voltage
EN to GND
DRVN to GND
DRVP to GND
REF, FBN, FBP to GND
Continuous Current Into DRVN, DRVP
All Other Pins
Operating Junction Temperature Range
Maximum Soldering Temperature (at leads, 10 sec)
Value
-0.3 to 6
-0.3 to 6
-0.3V to (V
IN
+ 0.3V)
-0.3V to (V
IN
+ 0.3V)
-0.3V to (V
IN
+ 0.3V)
±200
±10
-40 to 150
300
Units
V
V
V
V
V
mA
°C
°C
Thermal Information
2
Symbol
Θ
JA
P
D
Description
Thermal Resistance
Maximum Power Dissipation (T
A
= 25°C)
MSOP-8
TSOPJW-12
MSOP-8
3
TSOPJW-12
4
Value
150
160
667
625
Units
°C/W
mW
1. Stresses above those listed in Absolute Maximum Ratings may cause permanent damage to the device. Functional operation at condi-
tions other than the operating conditions specified is not implied. Only one Absolute Maximum Rating should be applied at any one time.
2. Mounted on an FR4 board.
3. Derate 6.7mW/°C above 25°C.
4. Derate 6.25mW/°C above 25°C.
3190.2006.01.1.2
3
AAT3190
Positive/Negative Charge Pump for Voltage Bias
Electrical Characteristics
V
IN
= 5.0V, C
REF
= 0.1µF, T
A
= -40°C to +85°C. Unless otherwise noted, typical values are T
A
= 25°C.
Symbol
V
IN
UVLO
I
IN
Description
Input Supply Range
Input Under-Voltage Threshold
Input Quiescent Supply Current
Conditions
V
IN
Rising
V
IN
Falling, 40mV Hysteresis (typ)
V
FBP
= 1.5V, V
FBN
= -0.2V,
No Load on DRVN and DRVP
V
EN
= 0V
Min
2.7
Typ
1.8
1.6
400
0.1
1.0
0
1.5
1.0
20
Max
5.5
Units
V
V
800
1.0
1.2
+100
+100
5.0
5.0
µA
µA
MHz
mV
nA
Ω
Ω
kΩ
V
nA
Ω
Ω
kΩ
V
V
I
SD
Shutdown Supply Current
F
OSC
Operating Frequency
Negative Low-Power Charge Pump
V
FBN
FBN Regulation Voltage
I
FBN
FBN Input Bias Current
R
DSNCHN
DRVN NCH On-Resistance
R
DSPCHMIN
MIN DRVN PCH On-Resistance
R
DSPCHMAX
MAX DRVN PCH On-Resistance
Positive Low-Power Charge Pump
V
FBP
FBP Regulation Voltage
I
FBP
FBP Input Bias Current
R
DSPCHP
DRVP PCH On-Resistance
R
DSNCHMIN
MIN DRVP NCH On-Resistance
R
DSNCHMIN
MAX DRVP NCH On-Resistance
Reference
Reference Voltage
V
REF
Reference Under-Voltage
Threshold
Logic Signals
V
IL
Input Low Voltage
V
IH
Input High Voltage
I
IL
Enable Input Low Current
I
IH
Enable Input High Current
Thermal Limit
T
SD
Over-Temperature Shutdown
Threshold
T
HYST
Over-Temperature Shutdown
Hysteresis
0.8
-100
-100
V
FBN
= -50mV
V
FBN
= 100mV, V
IN
= 4V
V
FBN
= -100mV, V
IN
= 4V
V
FBP
= 1.5V
V
FBP
= 1.15V, V
IN
= 4V
V
FBP
= 1.25V, V
IN
= 4V
-2.0µA < I
REF
< 50µA
V
REF
Rising
1.15
-60
1.2
1.0
3
20
1.25
+100
5.0
15
1.18
1.2
0.8
1.22
0.5
1.5
V
IN
= 5.0V, F
BP
= 1.5V, F
BN
= -0.2V
V
IN
= 5.0V, F
BP
= 1.5V, F
BN
= -0.2V
140
15
1
1
V
V
µA
µA
°C
°C
4
3190.2006.01.1.2
AAT3190
Positive/Negative Charge Pump for Voltage Bias
Typical Characteristics
Quiescent Current vs. Temperature
350
1000
Switching Frequency vs. Temperature
Quiescent Current (µA)
310
290
270
250
-40
-15
10
35
60
85
Frequency (kHz)
330
V
FBP
= 1.5V
V
FBN
= -0.2V
950
900
850
800
-40
-15
10
35
60
85
Temperature (°C)
Temperature (°C)
°
Reference Voltage vs. Temperature
1.22
Maximum V
OUT
vs. V
IN
(I
OUT
= 5mA and 15mA)
15
12.5
10
7.5
5
2.5
0
-2.5
-5
-7.5
-10
-12.5
-15
2.5
Reference Voltage (V)
1.21
Output Voltage (V)
I
OP
= 5mA
I
OP
= 15mA
I
ON
= 15mA
I
ON
= 5mA
3
3.5
4
4.5
5
5.5
1.2
1.19
1.18
-40
-15
10
35
60
85
Temperature (°C)
Input Voltage (V)
Positive Output Voltage vs. Load Current
(T
A
= 25°C)
°
12.4
12.2
Negative Output Voltage vs. Load Current
(T
A
= 25°C)
°
-6.5
-6.75
V
IN
= 5.0V
V
IN
= 5.0V
V
POS
(V)
12
11.8
11.6
11.4
0
5
10
15
20
25
30
35
40
V
NEG
(V)
-7
-7.25
-7.5
-7.75
-8
0
10
20
30
40
I
POS
(mA)
I
NEG
(mA)
3190.2006.01.1.2
5
京公网安备 11010802033920号
EEWORLD
