NCP631 Datasheet, PDF (1/10 Pages) ON Semiconductor – 3.0 A Linear Voltage Regulator with Soft Start

NCP631
3.0 A Linear Voltage
Regulator with Soft Start
The NCP631 is a low dropout positive voltage regulator that is
capable of providing a guaranteed output current of 3.0 A with a
maximum dropout voltage of 1.25 V at 3.0 A over temperature. The
NCP631 is currently offered as a fixed voltage version at 3.47 V. On
chip trimming adjusts the reference/output voltage to within "1.5%
accuracy. The soft start function allows control of start up times. This
prevents current spikes at start up due to output capacitor in-rush
current. Internal protection features consist of output foldback current
limiting, and thermal shutdown. The NCP631 is available in D²PAK
package.
Features
• Output Current of 3.0 A
• 1.25 V Maximum Dropout Voltage at 3.0 A Over Temperature
• Voltage on Shutdown Pin is TTL compatible
• Reference/Output Voltage Trimmed to "1.5 %
• Current Limit Protection
• Thermal Shutdown Protection
• 0°C to 125°C Junction Temperature Range
Applications
• Microprocessor Power Supplies
• SMPS Post Regulation
• Battery Chargers
• DSP Power Supplies
INPUT
C_in
2
4
1 ^NCP631 5
C_out
Cs
3
Shutdown
V_out
3.47
Figure 1. Typical Application Circuit
http://onsemi.com
1
5
D²PAK
D2T SUFFIX
CASE 936A
Tab = Ground
Pin 1. Shutdown
2. V_in
3. Ground
4. V_out
5. Soft Start
MARKING
DIAGRAM
NC
P631GD2T
AWLYWW
NCP631 = Specific Device Code
A = Assembly Location
WL = Wafer Lot
Y = Year
WW = Work Week
ORDERING INFORMATION
Device
NCP631GD2TR4
V_OUT
3.47
Package
D²PAK
Shipping
800/Tape
& Reel
© Semiconductor Components Industries, LLC, 2003
1
April, 2003 - Rev. 3
Publication Order Number:
NCP631/D