NCP1081
http://onsemi.com
2
DCDC Converter Controller
" Current Mode Control
" Supports Isolated and Nonisolated DCDC Converter
Applications
" Internal Voltage Regulators
" Wide Duty Cycle Range with Internal Slope
Compensation Circuitry
" Programmable Oscillator Frequency
" Programmable Softstart Time
(Top View)
PIN DIAGRAM
Exposed
Pad
1
SS
FB
COMP
VDDL
VDDH
GATE
ARTN
nCLASS_AT
CS
OSC
VPORTP
CLASS
UVLO
INRUSH
ILIM1
VPORTN1
RTN
VPORTN2
TEST1
TEST2
ORDERING INFORMATION
Part Number
Package
Shipping Configuration
Temperature Range
NCP1081DEG
TSSOP20 EP
(PbFree)
74 units / Tube
40癈 to 85癈
NCP1081DER2G
TSSOP20 EP
(PbFree)
2500 / Tape & Reel
40癈 to 85癈
For information on tape and reel specifications, including part orientation and tape sizes, please refer to our Tape and Reel Packaging
Specification Brochure, BRD8011/D.
Figure 1. NCP1081 Block Diagram
INTERNAL
SUPPLY
VDDH
INRUSH
ILIM1
CLASSIFICATION
DETECTION
VPORTN1,2
VPORTP
CLASS
INRUSH
ILIM1
VDDH
nCLASS_AT
VDDL
THERMAL
HOT SWAP SWITCH
CONTROL & CURRENT
LIMIT BLOCKS
UVLO
UVLO
RTN
ARTN
1.2 V
CONTROL
OSC
SS
FB
GATE
VDDL
VDDL
VDDL
VDDH
5 K
OSC
VDDL
VDDL
VPORT
MONITOR
20 mA
COMP
CS
5 mA
SHUT
DOWN
CONVERTER
DCDC
&
BANDGAP
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