MAX881 Maxim, MAX881 Datasheet - Page 3

• Manufacturer Part Number: MAX881
• Description: Low-Noise Bias Supply in MAX with Power-OK for GaAsFET PA
• Manufacturer: Maxim

(Circuit of Figure 3, V
-1.84
-1.86
-1.88
-1.92
-1.94
-1.96
-1.98
-2.00
-2.02
1.90
900
800
700
600
500
400
300
45
40
35
30
25
20
15
10
5
0
2.0
-60
0
V
CIRCUIT OF FIGURE 3b
OUT
CIRCUIT OF FIGURE 3a
1
2.5
-40
MAXIMUM OUTPUT CURRENT
NO-LOAD SUPPLY CURRENT
-1.8V
2
3.0
vs. OUTPUT CURRENT
-20
vs. INPUT VOLTAGE
OUTPUT CURRENT (mA)
vs. TEMPERATURE
OUTPUT VOLTAGE
3
INPUT VOLTAGE (V)
TEMPERATURE (°C)
3.5
0
V
4
V
_______________________________________________________________________________________
CIRCUIT OF FIGURE 3b
IN
CIRCUIT OF FIGURE 3a
OUT
OUT
4.0
20
= 3.6V, T
5
CIRCUIT OF FIGURE 3a
< 2mVp-p RIPPLE
< 2mVp-p RIPPLE
V
IN
6
4.5
40
= 2.5V
V
V
V
V
IN
IN
IN
IN
7
V
5.0
OUT
60
= 5.5V
= 3.6V
= 2.5V
3.6V
A
8
= +25°C, unless otherwise noted.)
5.5
-1.8V
80
9
6.0
100
10
Low-Noise Bias Supply in µMAX
with Power-OK for GaAsFET PA
-1.84
-1.86
-1.88
-1.90
-1.92
-1.94
-1.96
-1.98
-2.00
-2.02
800
700
600
500
400
300
200
100
24
20
16
12
8
4
0
2.0
2.0
0
V
CIRCUIT OF FIGURE 3b
NEGOUT
CIRCUIT OF FIGURE 3b
2.5
2.5
2
MAXIMUM NEGOUT CURRENT
vs. OUTPUT CURRENT
3.0
= 0.9 x V
3.0
4
vs. INPUT VOLTAGE
vs. INPUT VOLTAGE
OUTPUT CURRENT (mA)
OUTPUT VOLTAGE
START-UP TIME
INPUT VOLTAGE (V)
INPUT VOLTAGE (V)
3.5
3.5
6
CIRCUIT OF FIGURE 3a
NEGOUT(NO LOAD)
CIRCUIT OF FIGURE 3a
NO LOAD
SHDN TO POK DELAY
4.0
4.0
8
V
IN
Typical Operating Characteristics
= 2.5V
4.5
4.5
10
V
IN
5.0
5.0
12
3.6V
5.5
5.5
14
6.0
6.0
16
-1.95
-1.96
-1.97
-1.98
-1.99
-2.00
-2.01
-2.02
-2.03
103
102
101
100
900
800
700
600
500
400
300
99
98
97
2.0
2.0
2.0
I
LOAD
2.5
2.5
2.5
NO-LOAD SUPPLY CURRENT
= 4mA
OSCILLATOR FREQUENCY
3.0
3.0
3.0
vs. INPUT VOLTAGE
vs. INPUT VOLTAGE
T
vs. INPUT VOLTAGE
OUTPUT VOLTAGE
A
INPUT VOLTAGE (V)
INPUT VOLTAGE (V)
INPUT VOLTAGE (V)
= +25°C
3.5
3.5
T
3.5
A
= -40°C
4.0
4.0
4.0
4.5
4.5
4.5
5.0
5.0
5.0
T
A
= +85°C
5.5
5.5
5.5
6.0
6.0
6.0
3