NCP1596 Datasheet, PDF (1/12 Pages) ON Semiconductor – 1.5 MHz Current Mode PWM Buck Down Converter

NCP1596, NCP1596A
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1.5 A, 1.5 MHz Current
Mode PWM Buck Down
Converter
The NCP1596/NCP1596A is a current mode PWM buck converter
with integrated power switch. It can provide up to 1.5 A output current
with high conversion efficiency. High frequency PWM control
scheme can provide a low output ripple noise. Thus, it allows the
usage of small size passive components to reduce the board space. In a
low load condition, the controller will automatically change to PFM
mode which provides a higher efficiency at low load. Additionally, the
device includes soft−start, thermal shutdown with hysteresis,
cycle−by−cycle current limit, and short circuit protection. This device
is available in a compact 3x3 DFN package.
Features
• High Efficiency up to 90%, 1 A @ 3.3 V, 75% @ 1.2 V
• Fully Internal Compensation
• Low Output Voltage Ripple, 20 mV Typical
• ±1.5% Reference Voltage
• High PWM Switching Frequency, 1.5 MHz
• Automatic PWM / PFM Switchover at Light Load
• Built−in 1 ms Digital Soft Start
• Cycle−by−cycle Current Limit
• Thermal Shutdown with Hysteresis
• Internal UVLO Protection
• Ext. Adjustable Output Voltage
• Low Profile and Minimum External Components
• Designed for use with Ceramic Capacitor
• Compact 3x3 DFN Package
• These are Pb−Free Devices
Typical Applications
• Hard Disk Drives
• USB Power Device
• Wireless and DSL Modems
http://onsemi.com
1
6 PIN DFN 3x3
MN SUFFIX
CASE 506AH
MARKING DIAGRAMS
1 N1596
ALYW
G
1 1596A
ALYW
G
N1596/1596A = Specific Device Code
A = Assembly Location
L = Wafer Lot
Y = Year
W = Work Week
G = Pb−Free Package
PIN CONNECTIONS
FB
GND
LX
1596
NC
VCC
VCCP
FB
GND
LX
(Top View)
EN
VCC
VCCP
1596A
ORDERING INFORMATION
See detailed ordering and shipping information in the package
dimensions section on page 11 of this data sheet.
This document contains information on a product under development. ON Semiconductor
reserves the right to change or discontinue this product without notice.
© Semiconductor Components Industries, LLC, 2009
1
March, 2009 − Rev. P3
Publication Order Number:
NCP1596/D