Rainbow Electronics MAX15026 - Manual (Page 8)

MAX15026
Low-Cost, Small, 4.5V to 28V Wide Operating
Range, DC-DC Synchronous Buck Controller
8 _______________________________________________________________________________________
Functional Diagram
OSCILLATOR
DC-DC
AND
OSCILLATOR
ENABLE
LOGIC
V
REF
RT
EN
ENABLE
COMPARATOR OSC_ENABLE
BANDGAP
OK
GENERATOR
V CC
UVLO
DRV
UVLO
THERMAL
SHUTDOWN
AND ILIM
CURRENT
GEN
IN
UVLO
BGAP_OK
BGAP_OK
EN_INT
VL_OK
VDRV_OK
SHUTDOWN
VIN_OK
V REF
VIN_OK
VIN_OK
I BIAS
V BGAP
BGAP_OK
BGAP_OK
V DRV
VIN_OK
V
BGAP
LIM
IN
V CC
INTERNAL
VOLTAGE
REGULATOR
MAIN
BIAS
CURRENT
GENERATOR
V REF = 0.6V
V BGAP = 1.24V
BANDGAP
REFERENCE
CK
ENABLE
g M
SOFT-START/
SOFT-STOP
LOGIC AND
HICCUP LOGIC
V
REF
HICCUP
CK
ENABLE
DH_DL_ENABLE
V
REF
V REF
CK
CK
DH_DL_ENABLE
HICCUP
TIMEOUT
FB1
DAC_VREF
PWM
COMPARATOR
RAMP
GENERATOR
SINK
CURRENT-LIMIT
COMPARATOR
PGOOD
COMPARATOR
VALLEY
CURRENT-LIMIT
COMPARATOR
PWM
PWM
CONTROL
LOGIC
BOOST
DRIVER
HIGH-
SIDE
DRIVER
LOW-
SIDE
DRIVER
RAMP
GATEP
HICCUP TIMEOUT
HICCUP
LIM/20
LIM/10
COMP
BST
DH
LX
DRV
DL
GND
FB
PGOOD
GND
MAX15026