NCP1570 Datasheet, PDF (1/14 Pages) ON Semiconductor – Low Voltage Synchronous Buck Controller

NCP1570
Low Voltage Synchronous
Buck Controller
The NCP1570 is a low voltage buck controller. It provides the
control for a DC−DC power solution producing an output voltage as
low as 0.985 V over a wide current range. The NCP1570−based
solution is powered from 12 V with the output derived from a 5 V
supply. It contains all required circuitry for a synchronous NFET buck
regulator using the V²â„¢ control method to achieve the fastest possible
transient response and best overall regulation. The NCP1570 operates
at a fixed internal 200 kHz frequency and is packaged in an SO−8.
The NCP1570 provides undervoltage lockout protection, Soft Start,
Power Good with delay, and built−in adaptive non−overlap.
Features
• 0.985 V ± 1.0% Reference
• V² Control Topology
• 200 ns Transient Response
• Programmable Soft Start
• Power Good
• Programmable Power Good Delay
• 40 ns Gate Rise and Fall Times (3.3 nF Load)
• 50 ns Adaptive FET Non−Overlap Time
• Fixed 200 kHz Oscillator Frequency
• Undervoltage Lockout
• On/Off Control Through Use of the COMP Pin
• Overvoltage Protection through Synchronous MOSFETs
• Synchronous N−Channel Buck Design
• Dual Supply, 12 V Control, 5 V Power Source
http://onsemi.com
8
1
SO−8
D SUFFIX
CASE 751
PIN CONNECTIONS AND
MARKING DIAGRAM
1
V_CC
PWRGD
PGDELAY
COMP
8
GND
V_FB
GATE(L)
GATE(H)
A
= Assembly Location
WL, L = Wafer Lot
YY, Y = Year
WW, W = Work Week
ORDERING INFORMATION
Device
Package
Shipping
NCP1570D
SO−8
98 Units/Rail
NCP1570DR2
SO−8 2500 Tape & Reel
© Semiconductor Components Industries, LLC, 2006
1
July, 2006 − Rev. 5
Publication Order Number
NCP1570/D