Datasheet

MAX1822
High-Side Power Supply
_______________________________________________________________________________________ 3
50
150
100
250
200
350
300
400
1342 5678910
MAX1822
SUPPLY CURRENT
vs. C3 CAPACITOR VALUE
MAX1822 toc01
C3 CAPACITOR VALUE (
µ
F)
SUPPLY CURRENT (µA)
V
CC
= +5V, I
OUT
= 0
T
A
= +25
°
C
C1 = C2 = C*
C* = 0.01
µ
F
C* = 0.1
µ
F
C* = 0.033
µ
F
C* = 0.047
µ
F
C* =
0.022
µ
F
50
150
100
200
250
350
300
400
14523 678910
MAX1822 toc02
C3 CAPACITOR VALUE (
µ
F)
SUPPLY CURRENT (µA)
MAX1822
SUPPLY CURRENT
vs. C3 CAPACITOR VALUE
V
CC
= +16.5V
I
OUT
= 0
T
A
= +25
°
C
C1 = C2 = 0.01
µ
F
0
0.2
0.6
0.4
1.0
1.2
0.8
1.4
2684 1012141618
MAX1822 toc03
V
CC
(V)
SUPPLY CURRENT (mA)
MAX1822
SUPPLY CURRENT
vs. SUPPLY VOLTAGE
C1 = C2 = 0.01
µ
F
I
OUT
= 0
C3 = 1
µ
F
T
A
= +25
°
C
C1 = C2 = 0.47
µ
F
12
13
14
15
16
17
0 0.8 1.00.4 0.60.2 1.2 1.4 1.6 1.8 2.0
MAX1822 toc05
I
OUT
(mA)
V
OUT
(V)
MAX1822
OUTPUT VOLTAGE
vs. OUTPUT CURRENT
C1 = C2 = 0.01µF
V
CC
= +5V
C3 = 10
µ
F
T
A
= +25
°
C
C1 = C2 = 0.22µF
C1 = C2 = 0.47
µ
F
0
200
100
400
300
600
500
700
900
800
1000
0.01 0.1
MAX1822 toc04
C1 = C2 CAPACITANCE VALUE (
µ
F)
MAXIMUM I
OUT
(µA)
MAX1822
MAXIMUM OUTPUT CURRENT
vs. C1 = C2 CAPACITOR VALUE
V
CC
= +5V
C3 = 10
µ
F
T
A
= +25
°
C
NOTE: MAXIMUM I
OUT
IS THE LOAD
CURRENT AT THE POINT
WHERE V
OUT
BEGINS TO
LOSE REGULATION.
18
21
20
19
22
23
24
04312 5678910
MAX1822 toc05
I
OUT
(mA)
V
OUT
(V)
MAX1822
OUTPUT VOLTAGE
vs. OUTPUT CURRENT
C1 = C2
0.047
µ
F
C1 = C2
0.022
µ
F
C1 = C2
0.01
µ
F
V
CC
= +12V
C3 = 10
µ
F
T
A
= +25
°
C
__________________________________________Typical Operating Characteristics