Rainbow Electronics MAX1672 - Manual (Page 6)

MAX1672
Step-Up/Down DC-DC Converter
in QSOP Package
6 _______________________________________________________________________________________
N
LX
ILIM
PGND
PS
OUT
100mV
MAX1672
∆ T
ON
FIXED T OFF
GENERATOR
DRV
REF
ERROR
AMP 2
ERROR
AMP 1
INPUT
MONITOR
CURRENT-LIMIT
COMPARATOR
OFF
FB
REFERENCE
GENERATOR
P
FB
FB1
FB2
REF + OFFSET
REF
PS
N
REF
PGI
PGO
3/5
FB
REF
ONB
ONA
IN
OUT
70mV
N
GND
Figure 1. Functional Diagram