MAX15046 Datasheet, PDF (9/23 Pages) Maxim Integrated Products – 40V, High-Performance, Synchronous Buck Controller

40V, High-Performance, Synchronous
Buck Controller
Functional Diagram
RT
EN
VREF
V_BGAP
VIN_OK
V_BGAP
VCC
BGAP_OK
BGAP_OK
V_DRV
VIN_OK
LIM
IN
VREF
OSCILLATOR
CK
ENABLE
COMPARATOR
EN_INT
OSC ENABLE
HICCUP
VREF
CK
ENABLE
BGAP_OK
VREF
BANDGAP
BGAP_OK
CK
OK
GENERATOR
SOFT-START/STOP
AND
HICCUP
LOGIC
FB
GM
DAC_VREF
HICCUP TIMEOUT
DH_DL_ENABLE
PWM
COMPARATOR
RAMP GENERATOR
PWM
RAMP
INTERNAL
VOLTAGE
REGULATOR
VCC
UVLO
VL_OK
DC-DC
OSCILLATOR
AND
ENABLE
LOGIC
CK
DH_DL_ENABLE
HICCUP TIMEOUT
PWM
CONTROL
LOGIC
HICCUP
HIGH-
SIDE
DRIVER
DRV
UVLO
VDRV_OK
THERMAL
SHUTDOWN
AND ILIM
CURRENT
GENERATOR
SHUTDOWN
IN
UVLO
VIN_OK ^VIN_OK
IBIAS
SINK
CURRENT-LIMIT
COMPARATOR
LIM/20
LOW-
SIDE
DRIVER
MAIN
BIAS
CURRENT
GENERATOR
VALLEY
CURRENT-LIMIT
COMPARATOR
LIM/10
ENABLE
VREF
PGOOD
COMPARATOR
COMP
BST
DH
LX
CSP
DRV
DL
PGND
FB
PGOOD
GND
MAX15046
VREF = 0.6V
VBGAP = 1.24V
BANDGAP
REFERENCE
_______________________________________________________________________________________   9