MAX15026 Datasheet, PDF (8/23 Pages) Maxim Integrated Products – Low-Cost, Small, 4.5V to 28V Wide Operating Range, DC-DC Synchronous Buck Controller

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