NCP1595 Datasheet, PDF (1/12 Pages) ON Semiconductor – Current Mode PWM Converter for Low Voltage Outputs

NCP1595, NCP1595A
Current Mode PWM
Converter for Low Voltage
Outputs
The NCP1595/NCP1595A is a current mode PWM buck converter
with integrated power switch and synchronous rectifier. 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 for 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 compact 3x3 DFN
package.
Features
• High Efficiency 95% @ 3.375 V
• Synchronous Rectification for Higher Efficiency in PWM Mode
• Integrated MOSFET
• Fully Internal Compensation
• High Switching Frequency, 1.0 MHz
• Low Output Ripple
• Cycle−by−cycle Current Limit
• Current Mode Control
• Short Circuit Protection
• Built−in Slope Compensation for Current Mode PWM Converter
• $1.5% Reference Voltage
• Thermal Shutdown with Hysteresis
• Ext. Adjustable Output Voltage
• Fast Transient Response
• 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
DFN6 3*3 MM, 0.95 PITCH
CASE 506AH
MARKING DIAGRAMS
1 N1595
ALYW
G
1 1595A
ALYW
G
A = Assembly Location
L = Wafer Lot
Y = Year
W = Work Week
G = Pb−Free Package
PIN CONNECTIONS
FB
GND
LX
1595
NC
VCC
VCCP
FB
GND
LX
EN
VCC
VCCP
1595A
ORDERING INFORMATION
See detailed ordering and shipping information in the package
dimensions section on page 11 of this data sheet.
© Semiconductor Components Industries, LLC, 2006
1
October, 2006 − Rev. 2
Publication Order Number:
NCP1595/D