High-Efficiency, 8A, Current-Mode

Synchronous Step-Down Switching Regulator

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Functional Diagram

10µA

MAX15108

SS

EN

FB

GROUND SENSE

BUFFER

ERROR

AMPLIFIER

COMP

0.58V

SKIP

STRONG PREBIAS

FORCED_START

SKPM

CK

SS BUFFER

0.6V

C

RAMP

CK

OSCILLATOR

CONTROL

LOGIC

IN

IN

LX

LX

RAMP GEN

IN

CURRENT-SENSE

AMPLIFIER

HIGH-SIDE

CURRENT LIMIT

LOW-SIDE

SOURCE-SINK CURRENT LIMIT

AND ZERO-CROSSING

COMPARATOR

SINK

SOURCE

SKPM

PGOOD

ZX

0.555V RISING,

0.53V FALLING

POWER-GOOD

COMPARATOR

VOLTAGE

REFERENCE

BIAS

GENERATOR

EN LOGIC, IN UVLO

THERMAL SHDN

SHDN

SKIP-MODE

LOGIC

SKPM

IN

INX

LX

PGND