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NCP3170_14 Datasheet, PDF (1/26 Pages) ON Semiconductor – Synchronous PWM Switching Converter | |||
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NCP3170
Synchronous PWM
Switching Converter
The NCP3170 is a flexible synchronous PWM Switching Buck
Regulator. The NCP3170 operates from 4.5 V to 18 V, sourcing up to
3 A and is capable of producing output voltages as low as 0.8 V.
The NCP3170 also incorporates current mode control. To reduce the
number of external components, a number of features are internally set
including soft start, power good detection, and switching frequency.
The NCP3170 is currently available in an SOICâ8 package.
Features
⢠4.5 V to 18 V Operating Input Voltage Range
⢠90 mW High-Side, 25 mW Low-Side Switch
⢠FMEA Fault Tolerant During Pin Short Test
⢠3 A Continuous Output Current
⢠Fixed 500 kHz and 1 MHz PWM Operation
⢠Cycle-by-Cycle Current Monitoring
⢠1.5% Initial Output Accuracy
⢠Internal 4.6 ms Soft-Start
⢠Short-Circuit Protection
⢠Turn on Into Pre-bias
⢠Power Good Indication
⢠Light Load Efficiency
⢠Thermal Shutdown
⢠These are Pb-Free Devices
Typical Applications
⢠Set Top Boxes
⢠DVD/Bluârayt Drives and HDD
⢠LCD Monitors and TVs
⢠Cable Modems
⢠PCIe Graphics Cards
⢠Telecom/Networking/Datacom Equipment
⢠Point of Load DC/DC Converters
VIN
C1
22 mF
VIN
L1 4.7 mH
VSW
EN
NCP3170
PG
3.3 V
R1
COMP
CC
AGND
FB1
PGND
C2, C3
22 mF
R2
RC
http://onsemi.com
SOICâ8 NB
CASE 751
MARKING DIAGRAM
8
3170x
ALYW
G
1
3170x
x
A
L
Y
W
G
= Specific Device Code
= A or B
= Assembly Location
= Wafer Lot
= Year
= Work Week
= Pb-Free Package
PIN CONNECTIONS
PGND
VIN
AGND
FB
VSW
PG
EN
COMP
(Top View)
ORDERING INFORMATION
Device
Package
Shippingâ
NCP3170ADR2G SOICâ8 2,500/Tape & Reel
(PbâFree)
NCP3170BDR2G SOICâ8 2,500/Tape & Reel
(PbâFree)
â For information on tape and reel specifications,
including part orientation and tape sizes, please
refer to our Tape and Reel Packaging Specifications
Brochure, BRD8011/D.
Figure 1. Typical Application Circuit
© Semiconductor Components Industries, LLC, 2014
1
September, 2014 â Rev. 5
Publication Order Number:
NCP3170/D
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