Datasheet

MAX17497A/MAX17497B
AC-DC and DC-DC Peak Current-Mode Converters
with Integrated Step-Down Regulator
13Maxim Integrated
Figure 1. MAX17497A/MAX17497B Block Diagram
LDO
POK
5V, 50mA
V
CC
EN/UVLO
IN
OVI
RLIMF
SCOMF
EAFN
COMF
CHIPEN
1.23V
1.23V
1.23V
1.23V
1.23V
V
OUTB
PGNDB
LXB
INB
RESTEIN
PGNDF
LXF
SSF
1.17V
INB
POK
CHIPEN
EN_BUCK
COMP
250mV
RLIMFINT
CHIPEN
V
SS
FIX_SLOPE
V
SCOMPF
SLOPE
COMPENSATION
10µA
10µA
33V CLAMP
(MAX17497A ONLY)
OSC
V
CS
CLK
CONTROL
LOGIC AND
DRIVER
1 RUNAWAY
CONTROL
LOGIC AND
DRIVER
RUNAWAY HICCUP
V
SUM
CHIPEN
HICCUP
V
CS
V
SCOMPF
PEAK
PWK
RUNAWAY
HICCUP
V
CSB
1 RUNAWAY
1.23V
1V
V
CSBSUM
V
CSBSUM
INBCHIPEN
V
OUTB
EAFN
V
CSB
SSDONEF
SSDONEF
I
SLOPE
SSDONEB
PEAK
PWM
CLK
CLK
V
SUM
COMPF
REF
1.23V
MAX17497A
MAX17497B
SSDONEB
STEP-DOWN
SOFT-START
10µA
SSDONE
SSDONE