Low-Noise, Dual-Output, Regulated Charge Pump
for GaAsFET, LCD, and VCO Supplies
_____________________________Typical Operating Characteristics (continued)
(SYNC = IN, T
A
= +25°C, unless otherwise noted.)
POUT MAXIMUM OUTPUT CURRENT
vs. SUPPLY VOLTAGE
MAX768-TOC13
MAX768
NOUT MAXIMUM OUTPUT CURRENT
vs. SUPPLY VOLTAGE
80
70
60
50
40
30
20
10
0
ONLY NOUT LOADED
MAX768-TOC14
140
ONLY POUT LOADED
MAXIMUM OUTPUT CURRENT (mA)
120
100
80
60
40
20
0
2.5
3.0
3.5
4.0
4.5
90
MAXIMUM OUTPUT CURRENT (mA)
5.0
2.5
3.0
3.5
4.0
4.5
5.0
SUPPLY VOLTAGE (V)
SUPPLY VOLTAGE (V)
TIME TO EXIT SHUTDOWN
MAX768-TOC15
+3V,
PSHDN = NSHDN
+5V, V
POUT
0V
-5V, V
NOUT
0V,
RDY
1ms/div
POUT OUTPUT NOISE AND RIPPLE
MAX768-TOC16
NOUT OUTPUT NOISE AND RIPPLE
MAX768-TOC17
V
POUT,
500µV/div
AC COUPLED
V
NOUT
, 500µV/div
AC COUPLED
500µs/div
POUT = +5V AT 5mA
IN = 3.0V
NOUT = -5V AT 5mA
IN = 3.0V
500µs/div
_______________________________________________________________________________________
5
MAXIM [ MAXIM INTEGRATED PRODUCTS ]
