NCP1729
Switched Capacitor
Voltage Inverter
The NCP1729 is a CMOS charge pump voltage inverter that is
designed for operation over an input voltage range of 1.15 V to 5.5 V
with an output current capability in excess of 50 mA. The operating
current consumption is only 122 mA, and a power saving shutdown
input is provided to further reduce the current to a mere 0.4 mA. The
device contains a 35 kHz oscillator that drives four low resistance
MOSFET switches, yielding a low output resistance of 26 W and a
voltage conversion efficiency of 99%. This device requires only two
external 3.3 mF capacitors for a complete inverter making it an ideal
solution for numerous battery powered and board level applications.
The NCP1729 is available in the space saving TSOP−6 package.
http://onsemi.com
MARKING
DIAGRAM
TSOP−6
(SOT23−6)
SN SUFFIX
CASE 318G
6
1
1
EADAYW G
G
Features
EAD = Device Code
A
Y
W
G
= Assembly Location
= Year
= Work Week
• Operating Voltage Range of 1.15 V to 5.5 V
• Output Current Capability in Excess of 50 mA
• Low Current Consumption of 122 mA
• Power Saving Shutdown Input for a Reduced Current of 0.4 mA
• Operation at 35 kHz
= Pb−Free Package
(Note: Microdot may be in either location)
• Low Output Resistance of 26 W
• Space Saving TSOP−6 Package
• Pb−Free Package is Available
PIN CONNECTIONS
V
1
2
C+
6
5
4
out
Typical Applications
• LCD Panel Bias
• Cellular Telephones
• Pagers
V
SHDN
GND
in
C−
3
(Top View)
• Personal Digital Assistants
• Electronic Games
• Digital Cameras
• Camcorders
ORDERING INFORMATION
†
Device
Package
Shipping
• Hand Held Instruments
NCP1729SN35T1
TSOP−6
3000 /
Tape & Reel
NCP1729SN35T1G
TSOP−6
3000 /
−V
out
(Pb−Free)
Tape & Reel
6
1
2
3
†For information on tape and reel specifications,
including part orientation and tape sizes, please
refer to our Tape and Reel Packaging Specifications
Brochure, BRD8011/D.
V
in
5
4
This device contains 77 active transistors.
Figure 1. Typical Application
©
Semiconductor Components Industries, LLC, 2006
1
Publication Order Number:
March, 2006 − Rev. 4
NCP1729/D