Low-Noise, Dual-Output, Regulated Charge Pump
for GaAsFET, LCD, and VCO Supplies
MAX768
ABSOLUTE MAXIMUM RATINGS
VIN, C1-, SYNC,
PSHDN, NSHDN
to GND...............-0.3V to +6V
V+, C1+, C2+,
RDY
to GND...................................-0.3V to +12V
SETP to GND .......................................................... -0.3V to +3V
SETN to GND............................................................-3V to +0.3V
V-, C2- to GND ...................................................... -12V to +0.3V
OUTP, OUTN Short Circuited to GND .......................Continuous
NOUT to V- ........................................................... -0.3V to +12V
POUT to V+ ........................................................... -12V to +0.3V
Continuous Power Dissipation (T
A
= +70°C)
QSOP (derate 8.70mW/°C above +70°C) ......................696mW
Operating Temperature Range
MAX768EEE.......................................................-40°C to +85°C
Maximum Junction Temperature .....................................+150°C
Storage Temperature Range .............................-65°C to +165°C
Lead Temperature (soldering, 10sec) .............................+300°C
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
ELECTRICAL CHARACTERISTICS
(V
IN
= +3V, SYNC = IN, SETN = SETP = GND,
NSHDN
=
PSHDN
= IN, T
A
= -40°C to +85°C, unless otherwise noted. Typical values
are at T
A
= +25°C. See Figure 2.) (Note 1)
PARAMETER
Input Voltage Range
Minimum Input Start-Up Voltage
Positive Output Voltage
Negative Output Voltage
Positive Output Voltage Adjustable Range
Negative Output Voltage Adjustable Range
Maximum POUT, NOUT Output Currents
No-Load Supply Current at 100kHz
(both regulators active)
No-Load Supply Current at 100kHz
(negative regulator off)
No-Load Supply Current at 25kHz
(both regulators active)
Dropout Voltage (2 x V
IN
-
|
V
OUT
|
)
Line Regulation
Load Regulation
Output Voltage Noise
Shutdown/SYNC Logic-Low Input Threshold
Shutdown/SYNC Logic-High Input Threshold
SHUTDOWN
SHDN
Input Bias Current
Shutdown Supply Current
V
SHDN
= 3V
NSHDN
=
PSHDN
= SYNC = GND
0.1
0.1
2
10
µA
µA
2.0
I
LOAD
= 0
0mA < I
LOAD
< 5mA, V
IN
= 3.0V to 5.5V
0mA < I
LOAD
< 5mA, V
IN
= 3.0V to 5.5V
(Note 2)
(Note 3)
V
IN
= 3V, V
POUT
≥
4.81V, V
NOUT
≤
-4.82V
V
IN
= 3.0V
V
IN
= 5.5V
NSHDN
= GND
V
SYNC
= GND
2 x V
IN
-
|
V
OUT
|
V
IN
= 3V to 5.5V
I
POUT
= 0mA to 5mA,
I
NOUT
= 0mA to -5mA
C
POUT
= C
NOUT
= 10µF,
10kHz < f < 1MHz
POUT
NOUT
I
POUT
= I
NOUT
= 0.1mA
I
POUT
= I
NOUT
= 5mA
-0.12
4.81
-5.10
1.25
-11
5
0.8
1.5
0.3
0.45
20
420
0.0
0.06
1.2
1.7
0.4
900
0.12
0.12
0.80
1.4
CONDITIONS
MIN
3.0
2.5
5.00
-5.00
5.14
-4.82
11
-1.25
TYP
MAX
5.5
UNITS
V
V
V
V
V
V
mA
mA
mA
mA
mV
%/V
%/mA
mVp-p
V
V
2
_______________________________________________________________________________________
MAXIM [ MAXIM INTEGRATED PRODUCTS ]
