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NCV97310 Datasheet, PDF (1/25 Pages) ON Semiconductor – 3 Buck Regulators | |||
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NCV97310
Automotive Battery-
Connected Low-Iq Multi-
Output Power Management
Unit with 3 Buck Regulators
Description
The NCV97310 is a 3âoutput regulator consisting of a lowâIq
batteryâconnected 3 A, 2 MHz nonâsynchronous switcher and two
lowâvoltage 1.5 A, 2 MHz synchronous switchers; all using integrated
power transistors.
The highâvoltage switcher is capable of converting a 4.1 V to 18 V
battery input to a 5 V or 3.3 V output at a constant 2 MHz switching
frequency, delivering up to 3 A. In overvoltage conditions up to 36 V,
the switching frequency folds back to 1 MHz; in load dump conditions
up to 45 V the regulator shuts down.
The output of the batteryâconnected buck regulator serves as the low
voltage input for the 2 downstream synchronous switchers. Each
downstream output is adjustable from 1.2 V to 3.3 V, with a 1.5 A
average current limit and a constant 2 MHz switching frequency. Each
switcher has an independent enable and reset pin, giving extra power
management flexibility.
For lowâIq operating mode, the lowâvoltage switchers are disabled
and the standby rail is supplied by a lowâIq LDO (up to 150 mA) with
a typical Iq of 30 mA. The LDO regulator is in parallel to the
highâvoltage switcher, and is activated when the switcher is forced in
standby mode.
All 3 SMPS outputs use peak current mode control with internal
slope compensation, internallyâset softâstart, battery undervoltage
lockout, battery overvoltage protection, cycleâbyâcycle current
limiting, hiccup mode shortâcircuit protection and thermal shutdown.
An error flag is available for diagnostics.
www.onsemi.com
1 32
QFN32
MW SUFFIX
CASE 488AM
MARKING DIAGRAM
1
NCV97310
XX
AWLYYWWG
G
XX
= 33 or 50
A
= Assembly Location
WL = Wafer Lot
YY
= Year
WW = Work Week
G
= PbâFree Package
(Note: Microdot may be in either location)
ORDERING INFORMATION
See detailed ordering, marking and shipping information on
page 24 of this data sheet.
Features
⢠5.0 V and 3.3 V Versions Available
⢠Low Quiescent Current in Standby Mode
⢠Programmable Spread Spectrum for EMI Reduction
⢠2 Microcontroller Enabled Low Voltage Synchronous
Buck Converters
⢠Large Conversion Ratio of 18 V to 3.3 V Battery
Connected Switcher
⢠Wide Input of 4.1 to 45 V with Undervoltage Lockout
(UVLO)
⢠Fixed Frequency Operation Adjustable from 2.0 to
2.6 MHz
⢠Internal 1.5 ms Softâstarts
⢠Cycleâbyâcycle Current Limit Protections
⢠Hiccup Overcurrent Protections (OCP)
⢠Individual Reset Pins with Adjustable Delays
⢠QFN Package with Wettable Flanks (pin edge plating)
⢠NCV Prefix for Automotive and Other Applications
Requiring Unique Site and Control Change
Requirements; AECâQ100 Qualified and PPAP
Capable
⢠These Devices are PbâFree, Halogen Free/BFR Free
and are RoHS Compliant
Typical Applications
⢠Infotainment, Body Electronics, Telematics, ECU
© Semiconductor Components Industries, LLC, 2015
1
September, 2015 â Rev. 4
Publication Order Number:
NCV97310/D
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