NCV8851-1 Datasheet, PDF (1/18 Pages) ON Semiconductor – Automotive Grade Synchronous Buck Controller

NCV8851-1
Automotive Grade
Synchronous Buck
Controller
The NCV8851−1 is an adjustable output, synchronous buck
controller, which drives dual N−channel MOSFETs, ideal for high
power applications. Average current mode control is employed for
very fast transient response and tight regulation over wide input
voltage and output load ranges. The IC incorporates an internal fixed
6.0 V low−dropout linear regulator (LDO), which supplies charge to
the switch mode power supply’s (SMPS) bottom gate driver, limiting
the power lost to excess gate drive. The IC is designed for operation
over a wide input voltage range (4.5 V to 40 V) and is capable of 10 to
1 voltage conversion at 500 kHz.
Additional controller features include undervoltage lockout,
internal soft−start, low quiescent current sleep mode, programmable
frequency, SYNC function, average current limiting, cycle−by−cycle
overcurrent protection and thermal shutdown.
Features
• Average Current Mode Control
• 0.8 V ±2% Reference Voltage
• Wide Input Voltage Range of 4.5 V to 40 V
• Operates through Load Dump Conditions
• 6.0 V Low−dropout Linear Regulator (LDO)
• Input UVLO (Undervoltage Lockout)
• Internal Soft−start
• 1.0 mA Maximum Quiescent Current in Sleep Mode
• Adaptive Non−overlap Circuitry
• 180 ns Minimum High−side Gate Off−time
• Programmable Fixed Frequency – 170 kHz to 500 kHz
• External Clock Synchronization up to 600 kHz
• Average Current Limiting (ACL)
• Cycle−by−Cycle Overcurrent Protection (OCP)
• Thermal Shutdown (TSD)
• This is a Pb−Free Device
Applications
• Automotive Systems Requiring High Current
• Pre−regulated Supply for Low−voltage SMPSs and LDOs
www.onsemi.com
TSSOP−20
SUFFIX DB
CASE 948E
MARKING DIAGRAM
V88
51−1
ALYWG
G
V8851−1 = Specific Device Code
A
= Assembly Location
L
= Wafer Lot
Y
= Year
W
= Work Week
G
= Pb−Free Package
(Note: Microdot may be in either location)
ORDERING INFORMATION
Device
Package
NCV8851−1DBR2G TSSOP−20
(Pb−Free)
Shipping^†
2500 / Tape &
Reel
†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.
© Semiconductor Components Industries, LLC, 2014
1
November, 2014 − Rev. 2
Publication Order Number:
NCV8851−1/D