Rainbow Electronics MAX768 - Manual (Page 3)

MAX768
Low-Noise, Dual-Output, Regulated Charge Pump
for GaAsFET, LCD, and VCO Supplies
_______________________________________________________________________________________ 3
ELECTRICAL CHARACTERISTICS (continued)
(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)
SYNC = GND (divide by 4)
CONDITIONS
µA 0.1 2 SYNC Input Leakage Current
21.5 25 28.5
% 40 60 SYNC Duty Cycle (external)
kHz 20 240 SYNC Frequency Range (external)
UNITS MIN TYP MAX PARAMETER
I NOUT = 0.1mA
I POUT = 0.1mA
V
-1.275 -1.25 -1.225
Negative Set-Reference Voltage
-1.270 -1.25 -1.230
V
1.215 1.25 1.285
Positive Set-Reference Voltage
1.217 1.25 1.283
V RDY = 10V
Percent of V NOUT , I NOUT = 5mA
V SETP = V SETN = 1.3V
mA 10 Maximum Sink Current
µA 0.01 2 Output Off Current
% 85 94 98 RDY Output Threshold
µA 0.01 0.1 SETP, SETN Input Leakage Current
V SYNC = 3V
kHz
85 100 115
Oscillator Frequency (internal)
T A = +25°C
T A = -40°C to + 85°C
T A = +25°C
T A = -40°C to + 85°C
I SINK = 2mA V 0.25 Output Low Voltage
SYNC
SET INPUT
RDY OUTPUT
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 V IN - dropout voltage.
Note 3: Maximum output voltage range is from the negative reference voltage to -2 x V IN + dropout voltage.
__________________________________________Typical Operating Characteristics
(SYNC = IN, T A = +25°C, unless otherwise noted.)
0.30
IN = 3.0V
NOUT = -5V
POUT = +5V
0
0 5 15 25
mV RMS OUTPUT VOLTAGE
vs. OUTPUT CURRENT
0.10
MAX768-TOC01
OUTPUT CURRENT (mA)
OUTPUT VOLTAGE (mV
RMS
)
10 20
0.20
5.2
4.0
0 5 15 30
POUT OUTPUT VOLTAGE
vs. OUTPUT CURRENT
4.2
4.8
5.0 MAX768-TOC02
OUTPUT CURRENT (mA)
OUTPUT VOLTAGE (V)
10 20 25
4.6
4.4
IN = 4.0V
IN = 3.0V
ONLY POUT LOADED
-4.2
-5.0
0 5 15 30
NOUT OUTPUT VOLTAGE vs.
OUTPUT CURRENT
-4.9
-4.4
-4.3
MAX768-TOC03
OUTPUT CURRENT (mA)
OUTPUT VOLTAGE (V)
10 20 25
-4.5
-4.7
-4.8
-4.6
IN = 4.0V
IN = 3.0V
ONLY NOUT LOADED