NCP1117, NCV1117
1.0 A Low−Dropout Positive
Fixed and Adjustable
Voltage Regulators
The NCP1117 series are low dropout positive voltage regulators that
are capable of providing an output current that is in excess of 1.0 A
with a maximum dropout voltage of 1.2 V at 800 mA over
temperature. This series contains nine fixed output voltages of 1.5 V,
1.8 V, 1.9 V, 2.0 V, 2.5 V, 2.85 V, 3.3 V, 5.0 V, and 12 V that have no
minimum load requirement to maintain regulation. Also included is an
adjustable output version that can be programmed from 1.25 V to
18.8 V with two external resistors. On chip trimming adjusts the
reference/output voltage to within 1.0% accuracy. Internal protection
features consist of output current limiting, safe operating area
compensation, and thermal shutdown. The NCP1117 series can
operate with up to 20 V input. Devices are available in SOT−223 and
DPAK packages.
http://onsemi.com
Tab
SOT−223
ST SUFFIX
CASE 318H
1
1 2 3
3
(Top View)
Pin: 1. Adjust/Ground
2. Output
3. Input
Heatsink tab is connected to Pin 2.
Tab
Features
• Output Current in Excess of 1.0 A
• 1.2 V Maximum Dropout Voltage at 800 mA Over Temperature
DPAK
DT SUFFIX
CASE 369C
1
2
• Fixed Output Voltages of 1.5 V, 1.8 V, 1.9 V, 2.0 V, 2.5 V, 2.85 V,
3
1
3
3.3 V, 5.0 V, and 12 V
(Top View)
• Adjustable Output Voltage Option
• No Minimum Load Requirement for Fixed Voltage Output Devices
ORDERING INFORMATION
See detailed ordering and shipping information in the package
dimensions section on pages 11 and 12 of this data sheet.
• Reference/Output Voltage Trimmed to 1.0%
• Current Limit, Safe Operating and Thermal Shutdown Protection
• Operation to 20 V Input
DEVICE MARKING INFORMATION
See general marking information in the device marking
section on page 14 of this data sheet.
• NCV Prefix for Automotive and Other Applications Requiring Site
and Control Changes
• Pb−Free Packages are Available
Applications
• Consumer and Industrial Equipment Point of Regulation
• Active SCSI Termination for 2.85 V Version
• Switching Power Supply Post Regulation
• Hard Drive Controllers
• Battery Chargers
TYPICAL APPLICATIONS
110 W
110 W
110 W
3
2
NCP1117
XT285
Input
Output
2
3
NCP1117
XTA
18 to 27
Lines
+
+
22
mF
10
mF
Input
Output
+
+
10
mF
10
3
NCP1117
XTXX
2
1
1
mF
+
+
10
mF
10
mF
4.75 V
to
+
1
110 W
5.25 V
Figure 1. Fixed
Output Regulator
Figure 2. Adjustable
Output Regulator
Figure 3. Active SCSI Bus Terminator
© Semiconductor Components Industries, LLC, 2007
1
Publication Order Number:
January, 2007 − Rev. 17
NCP1117/D