Datasheet

MAX1822
High-Side Power Supply
4 _______________________________________________________________________________________
Pin Description
0
40
20
80
60
120
100
140
180
160
200
1 3452 678910
MAX1822 toc07
RESERVOIR CAPACITOR (
µ
F)
V
OUT
RIPPLE (mV)
MAX1822
OUTPUT VOLTAGE RIPPLE
vs. RESERVOIR CAPACITOR C3
T
A
= +25
°
C
V
CC
= +5V
I
OUT
= 500
µ
A
C1 = C2 = 0.047
µ
F
V
CC
= +16.5V
I
OUT
= 1mA
C1 = C2 = 0.01
µ
F
0 5 10 15 20
MAX1822 toc08
V
CC
(V)
0.1
1
10
TURN-ON TIME (ms)
MAX1822
TURN-ON TIME
vs. SUPPLY VOLTAGE
I
OUT
= 0
T
A
= +25
°
C
Typical Operating Characteristics (continued)
PIN NAME FUNCTION
1 C1+ Positive terminal to primary charge-pump capacitor
2 C2- Negative terminal to secondary charge-pump capacitor
3 PR Power-Ready Output. High when V
OUT
is ≥ V
CC
+ 8.5V with respect to GND.
4 GND Ground
5V
OUT
High-Side Voltage Out
6 C2+ Positive terminal to secondary charge-pump capacitor
7 C1- Negative terminal to primary charge-pump capacitor
8V
CC
Input Supply