herunterladen
© Semiconductor Components Industries, LLC, 2010
January, 2010 − Rev. 0
1 Publication Order Number:
NCP1581/D
NCP1581
High Frequency Synchronous
Step Down PWM Controller
for Tracking Applications
The NCP1581 controller IC is designed to provide a simple
synchronous buck regulator for on−board DC to DC applications in a
14−pin SOIC. The NCP1581 is designed specifically for tracking
applications by providing the track input.
The NCP1581 operates at a fixed internal 400 kHz switching
frequency allowing the use of small external components. The device
features a programmable soft start set by an external capacitor,
under−voltage lockout and output under−voltage detection that latches
off the device when an output short is detected.
Features
• Power up Sequencing / Tracking
• Enable Input
• Internal 400 kHz Oscillator
• Programmable Soft−Start
• Fixed Frequency Voltage Mode
• Voltage Mode Adaptive Deadtime
• This is a Pb−Free Device
Applications
• Tracking Applications
• Game Consoles
• Computing Peripheral Voltage Regulators
• Graphics Cards
• General DC to DC Converters
Figure 1. Typical Application Circuit
NCP1581
SOIC−14
D SUFFIX
CASE 751A
NCP1581G
AWLYWW
A = Assembly Location
WL = Wafer Lot
Y = Year
WW = Work Week
G = Pb−Free Package
MARKING
DIAGRAM
PIN CONNECTIONS
http://onsemi.com
See detailed ordering and shipping information in the package
dimensions section on page 13 of this data sheet.
ORDERING INFORMATION
1
14
(Top View)
NC
SS
COMP
NC
VC
HDRV
PGND
LDRV
GND
NC
VCC
NC
VP
FB
1
1
Verzeichnis
- ・ Konfiguration des Pinbelegungsdiagramms on Seite 1
- ・ Abmessungen des Paketumrisses on Seite 14
- ・ Paket-Footprint-Pad-Layout on Seite 14
- ・ Teilenummerierungssystem on Seite 1 Seite 13 Seite 14
- ・ Markierungsinformationen on Seite 1
- ・ Blockdiagramm on Seite 2
- ・ Typisches Anwendungsschaltbild on Seite 1
- ・ Beschreibung der Funktionen on Seite 3
- ・ Technische Daten on Seite 3 Seite 4 Seite 5 Seite 13
- ・ Anwendungsbereich on Seite 1
- ・ Elektrische Spezifikation on Seite 4 Seite 5
