Datasheet

1.8V to 28V Input, PWM Step-Up
Controllers in µMAX
MAX668
LDO
CS+
FB
SHDN
PGND
FREQREF
V
CC
GND
T1
1:2
EXT
V
IN
= +5V
T1: COILTRONICS CTX03-14232
+5V @ 400mA
+5V RETURN
0.1Ω
R2
301k
1%
510Ω
TLV431
610Ω0.068µF
R3
100k
1%
MBR0540L
MBR0540L
47µH
220µF
10V
0.22µF
1µF
100k
10k
MOC211
IRF7603
220µF
10V
0.1µF
Figure 7. Isolated +5V to +5V at 400mA Power Supply
PACKAGE TYPE PACKAGE CODE OUTLINE NO. LAND PATTERN NO.
10 µMAX U10-2 21-0061 90-0330
Package Information
For the latest package outline information and land patterns (footprints), go to www.maxim-ic.com/packages. Note that a "+", "#", or
"-" in the package code indicates RoHS status only. Package drawings may show a different suffix character, but the drawing per-
tains to the package regardless of RoHS status.
Maxim Integrated
17
MAX668/MAX669