MAX768 데이터 시트보기 (PDF) - Maxim Integrated
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MAX768
Maxim Integrated
MAX768 Datasheet PDF : 12 Pages
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Low-Noise, Dual-Output, Regulated Charge Pump
for GaAsFET, LCD, and VCO Supplies
ELECTRICAL CHARACTERISTICS (continued)
(VIN = +3V, SYNC = IN, SETN = SETP = GND, NSHDN = PSHDN = IN, TA = -40°C to +85°C, unless otherwise noted. Typical values
are at TA = +25°C. See Figure 2.) (Note 1)
PARAMETER
CONDITIONS
MIN TYP MAX UNITS
SYNC
SYNC Frequency Range (external)
20
240 kHz
SYNC Duty Cycle (external)
40
60
%
Oscillator Frequency (internal)
SYNC = GND (divide by 4)
VSYNC = 3V
21.5
25
28.5
kHz
85
100
115
SYNC Input Leakage Current
0.1
2
µA
SET INPUT
Positive Set-Reference Voltage
Negative Set-Reference Voltage
IPOUT = 0.1mA
INOUT = 0.1mA
TA = +25°C
1.217 1.25 1.283
V
TA = -40°C to + 85°C 1.215 1.25 1.285
TA = +25°C
-1.270 -1.25 -1.230
V
TA = -40°C to + 85°C -1.275 -1.25 -1.225
SETP, SETN Input Leakage Current
RDY OUTPUT
VSETP = VSETN = 1.3V
0.01
0.1
µA
RDY Output Threshold
Percent of VNOUT, INOUT = 5mA
85
94
98
%
Output Low Voltage
ISINK = 2mA
0.25
V
Output Off Current
Maximum Sink Current
VRDY = 10V
0.01
2
µA
10
mA
Note 1: Parameters to -40°C are guaranteed by design, not production tested.
Note 2: Maximum output voltage range is from the positive reference voltage to 2 x VIN - dropout voltage.
Note 3: Maximum output voltage range is from the negative reference voltage to -2 x VIN + dropout voltage.
__________________________________________Typical Operating Characteristics
(SYNC = IN, TA = +25°C, unless otherwise noted.)
mVRMS OUTPUT VOLTAGE
vs. OUTPUT CURRENT
0.30
IN = 3.0V
0.20
NOUT = -5V
POUT = +5V
0.10
0
0
5
10
15
20
25
OUTPUT CURRENT (mA)
POUT OUTPUT VOLTAGE
vs. OUTPUT CURRENT
5.2
ONLY POUT LOADED
5.0
IN = 4.0V
4.8
IN = 3.0V
4.6
4.4
4.2
4.0
0
5 10 15 20 25 30
OUTPUT CURRENT (mA)
NOUT OUTPUT VOLTAGE vs.
OUTPUT CURRENT
-4.2
ONLY NOUT LOADED
-4.3
-4.4
-4.5
IN = 3.0V
-4.6
-4.7
-4.8
-4.9
-5.0
0
IN = 4.0V
5 10 15 20 25 30
OUTPUT CURRENT (mA)
_______________________________________________________________________________________ 3
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