Rainbow-electronics MAX684 Manual do Utilizador Página 3
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MAX682/MAX683/MAX684
3.3V-Input to Regulated 5V-Output
Charge Pumps
_______________________________________________________________________________________ 3
ELECTRICAL CHARACTERISTICS (continued)
(V
IN
= 3V, V
SKIP
= 0V, C
IN
= 1µF, C
X
= 0.47µF, C
OUT
= 2µF, I
SHDN
= 22µA; I
MAX
= 250mA for MAX682, I
MAX
= 100mA for MAX683,
I
MAX
= 50mA for MAX684; T
A
= T
MIN
to T
MAX
, unless otherwise noted. Typical values are at T
A
= +25°C.) (Note 1)
Note 1: Specifications to -40°C are guaranteed by design and not production tested.
Note 2: Current into SHDN determines oscillator frequency: R
EXT
(kΩ) = 45000 (V
IN
- 0.69V) / f
OSC
(kHz)
V
IN
= 5.5V, V
SKIP
= 0V or 5.5V
V
IN
= 5.5V
CONDITIONS
µA-1 1I
SKIP
SKIP Input Leakage Current
2.4V
INH, SKIP
SKIP Input Voltage High
V
0.8V
INL, SKIP
SKIP Input Voltage Low
UNITSMIN TYP MAXSYMBOLPARAMETER
__________________________________________Typical Operating Characteristics
(Circuit of Figure 5, V
IN
= 3.3V, component values from Tables 2 and 3, T
A
= +25°C, unless otherwise noted.)
0
2
6
MAX682
MAX683
MAX684
4
8
10
2 3 4 5 6
NO-LOAD SUPPLY CURRENT
vs. SUPPLY VOLTAGE
MAX682 TOC01
SUPPLY VOLTAGE (V)
SUPPLY CURRENT (mA)
SKIP = HIGH
I
SHDN
= 22µA
5.50
4.00
1 10 100 1000
OUTPUT VOLTAGE vs. LOAD CURRENT
(SKIP = LOW)
MAX682 TOC03
LOAD CURRENT (mA)
OUTPUT VOLTAGE (V)
4.50
5.00
5.25
4.25
4.75
MAX684
MAX683
MAX682
5.50
4.00
1 10 100 1000
OUTPUT VOLTAGE vs. LOAD CURRENT
(SKIP = HIGH)
MAX682 TOC04
LOAD CURRENT (mA)
OUTPUT VOLTAGE (V)
4.50
5.00
5.25
4.25
4.75
MAX684
MAX683
MAX682
SKIP = HIGH
I
SHDN
= 22µA
3.50
3.75
4.00
4.25
4.50
4.75
5.00
5.25
5.50
2 3 4 5 6
OUTPUT VOLTAGE
vs. SUPPLY VOLTAGE
MAX682 TOC06
SUPPLY VOLTAGE (V)
OUTPUT VOLTAGE (V)
SKIP = HIGH
SKIP = LOW
10M
10k
0.1 1 10 100
OSCILLATOR FREQUENCY vs.
SHUTDOWN PIN INPUT CURRENT
MAX682 TOC08
SHDN INPUT CURRENT (µA)
OSCILLATOR FREQUENCY (Hz)
100k
1M
100
0.1
0.1 1 10 100
NO-LOAD SUPPLY CURRENT vs.
SHUTDOWN PIN INPUT CURRENT
MAX682 TOC09
SHDN INPUT CURRENT (µA)
NO-LOAD SUPPLY CURRENT (mA)
1
10
MAX683
MAX682
MAX684
SKIP = HIGH
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