MAX768
Low-Noise, Dual-Output, Regulated Charge Pump
for GaAsFET, LCD, and VCO Supplies
2 _______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
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)
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.
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
0mA < I
LOAD
< 5mA, V
IN
= 3.0V to 5.5V
I
LOAD
= 0
NSHDN = PSHDN = SYNC = GND
V
SHDN
= 3V
V
IN
= 3V to 5.5V
NSHDN = GND
(Note 2)
(Note 3)
V
IN
= 3V, V
POUT
≥ 4.81V, V
NOUT
≤ -4.82V
V
IN
= 3.0V
I
POUT
= 0mA to 5mA,
I
NOUT
= 0mA to -5mA
CONDITIONS
µA0.1 10Shutdown Supply Current
µA0.1 2
SHDN Input Bias Current
V2.0Shutdown/SYNC Logic-High Input Threshold
V0.4Shutdown/SYNC Logic-Low Input Threshold
%/mA0.06 0.12Load Regulation
V-5.10 -5.00 -4.82Negative Output Voltage
V2.5
V3.0 5.5Input Voltage Range
Minimum Input Start-Up Voltage
%/V-0.12 0.0 0.12Line Regulation
mA0.3
No-Load Supply Current at 100kHz
(negative regulator off)
V1.25 11Positive Output Voltage Adjustable Range
V-11 -1.25Negative Output Voltage Adjustable Range
mA5Maximum POUT, NOUT Output Currents
mA
0.8 1.4
No-Load Supply Current at 100kHz
(both regulators active)
UNITSMIN TYP MAXPARAMETER
V
SYNC
= GND mA0.45 0.80
No-Load Supply Current at 25kHz
(both regulators active)
mV
420 900
Dropout Voltage (2 x V
IN
-
|
V
OUT
|
)
20
V
IN
= 5.5V 1.5
I
POUT
= I
NOUT
= 5mA
2 x V
IN
-
|
V
OUT
|
0mA < I
LOAD
< 5mA, V
IN
= 3.0V to 5.5V V4.81 5.00 5.14Positive Output Voltage
C
POUT
=C
NOUT
=
10µF,
10kHz < f < 1MHz
1.7
POUT
NOUT
mVp-p
1.2
Output Voltage Noise
SHUTDOWN
I
POUT
= I
NOUT
= 0.1mA
(17 Seiten)
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