Typical operating characteristics (continued) – Rainbow Electronics MAX768 User Manual
Page 4
MAX768
Low-Noise, Dual-Output, Regulated Charge Pump
for GaAsFET, LCD, and VCO Supplies
4
_______________________________________________________________________________________
20
0
-40
-15
35
85
SHDN SUPPLY CURRENT
vs. TEMPERATURE
MAX768-TOC07
TEMPERATURE (°C)
SHDN SUPPLY CURRENT (
µ
A)
60
10
4
2
8
6
10
12
14
16
18
V
IN
= 3.3V
V
IN
= 5.0V
90
0
0.1
1
10
100
EFFICIENCY vs. LOAD CURRENT
(NOUT ONLY LOADED)
10
20
30
40
50
60
70
80
MAX768 TOC10
LOAD CURRENT (mA)
EFFICIENCY (%)
V
IN
= 3.0V
V
IN
= 4.0V
0.40
-0.05
-40
-15
35
85
SHDN SUPPLY CURRENT
vs. TEMPERATURE
MAX768-TOC08
TEMPERATURE (°C)
SHDN SUPPLY CURRENT (
µ
A)
60
10
0.05
0
0.15
0.10
0.20
0.25
0.30
0.35
V
IN
= 5.0V
V
IN
= 4.0V
V
IN
= 3.3V
115
10
2.5
3.0
4.0
6.0
CHARGE-PUMP FREQUENCY
vs. SUPPLY VOLTAGE
MAX768-TOC05
SUPPLY VOLTAGE (V)
CHARGE-PUMP FREQUENCY (kHz)
4.5
3.5
5.0
5.5
40
25
70
55
85
100
SYNC = GND
SYNC = IN
120
0
-55 -35
5
125
CHARGE-PUMP FREQUENCY
vs. TEMPERATURE
MAX768-TOC06
TEMPERATURE (°C)
CHARGE-PUMP FREQUENCY (kHz)
25
-15
45
85
65
105
40
20
80
60
100
SYNC = GND
SYNC = IN
V
IN
= 3.3V
1.8
0
2.5
3.0
4.0
6.0
SUPPLY CURRENT
vs. SUPPLY VOLTAGE (NO LOAD)
MAX768-TOC09
SUPPLY VOLTAGE (V)
SUPPLY CURRENT (mA)
5.0
4.5
5.5
3.5
0.4
0.2
0.8
0.6
1.0
1.2
1.4
1.6
f = 25kHz
f = 100kHz
90
0
0.1
1
10
100
EFFICIENCY vs. OUTPUT CURRENT
(POUT ONLY LOADED)
10
20
30
40
50
60
70
80
MAX768 TOC11
OUTPUT CURRENT (mA)
EFFICIENCY (%)
V
IN
= 3.0V
V
IN
= 4.0V
90
0
0.1
1
10
100
EFFICIENCY vs. OUTPUT CURRENT
LOAD BETWEEN POUT AND NOUT
10
20
30
40
50
60
70
80
MAX768 TOC12
OUTPUT CURRENT (mA)
EFFICIENCY (%)
V
IN
= 3.0V
V
IN
= 4.0V
____________________________Typical Operating Characteristics (continued)
(SYNC = IN, T
A
= +25°C, unless otherwise noted.)
4
0
0
40
120
320
SUPPLY CURRENT
vs. SYNC FREQUENCY
3
MAX768-TOC04
SYNC FREQUENCY (kHz)
SUPPLY CURRENT (mA)
160
80
200 240 280
1
2
V
IN
= 3.3V
V
IN
= 5.0V