MAX1864 Maxim, MAX1864 Datasheet - Page 7

• Manufacturer Part Number: MAX1864
• Description: xDSL/Cable Modem Triple/Quintuple Output Power Supplies
• Manufacturer: Maxim

(Circuit of Figure 1, V
2.50
2.48
2.46
2.44
2.42
100mA
2.467V
2.457V
0
0.01
OUTPUT VOLTAGE vs. LOAD CURRENT
A. I
B. V
C
CIRCUIT OF FIGURE 1
LDO(POS)
OUTZ
OUTZ
POSITIVE LINEAR REGULATOR
POSITIVE LINEAR REGULATOR
xDSL/Cable Modem Triple/Quintuple Output
0.1
= 1mA TO 100mA, 50mA/div
= 2.5V, 5mV/div
= 10µF CERAMIC, V
LOAD CURRENT (mA)
(Q
LOAD TRANSIENT
(Q
LDO
LDO
1
_______________________________________________________________________________________
IN
10µs/div
= 2N3905)
V
= 2W3905)
= 12V, V
SUP(POS)
10
V
SUP(POS)
SUP(POS)
= 3.3V
OUT
100
MAX1864/65 toc13
= 3.3V
= 5.0V
= 3.3V, T
1000
A
B
A
2.50
2.48
2.46
2.44
2.42
= +25°C, unless otherwise noted.)
Typical Operating Characteristics (continued)
2.50
2.48
2.46
2.44
2.42
0.01
OUTPUT VOLTAGE vs. SUPPLY VOLTAGE
2
OUTPUT VOLTAGE vs. LOAD CURRENT
POSITIVE LINEAR REGUALTOR
POSITIVE LINEAR REGULATOR
3
0.1
LOAD CURRENT (mA)
SUPPLY VOLTAGE (V)
(Q
(Q
4
LDO
I
LDO
V
OUT2
1
SUP(POS)
I
OUT2
= 2N3905)
= TIP30)
= 100mA
V
5
SUP(POS)
= 1mA
10
= 3.3V
6
= 5.0V
100
7
1000
8
Power Supplies
2.50
2.48
2.46
2.44
2.42
80
70
60
50
40
30
20
10
0
0.1
OUTPUT VOLTAGE vs. SUPPLY VOLTAGE
2
I
OUT2
POWER-SUPPLY REJECTION RATIO
POSITIVE LINEAR REGULATOR
POSITIVE LINEAR REGULATOR
= 50mA
4
1
SUPPLY VOLTAGE (V)
(Q
(Q
FREQUENCY (kHz)
LDO
LDO
6
= 2N3905)
= TIP30)
10
I
I
OUT2
OUT2
8
= 1mA
= 100mA
100
10
1000
12
7