LM2686 Datasheet, PDF (1/8 Pages) National Semiconductor (TI) – Regulated Switched Capacitor Voltage Converter

November 1999
LM2686
Regulated Switched Capacitor Voltage Converter
General Description
The LM2686 CMOS charge-pump voltage converter oper-
ates as an input voltage doubler and a +5V regulator for an
input voltage in the range of +2.85V to +6.5V. Three low cost
capacitors are used in this circuit to provide up to 50mA of
output current at +5.0V (± 5%). The LM2686 operates at a
130 kHz switching frequency to reduce output resistance
and voltage ripple. With an operating current of only 450µA
(operating efficiency greater than 80% with most loads) and
6.0µA typical shutdown current, the LM2686 is ideal for use
in battery powered systems. The device is in a small 14-pin
TSSOP package.
Features
n +5V regulated output
n Doubles input supply voltage
n TSSOP 14 package
n 80% typical conversion efficiency at 25mA
n Input voltage range of 2.85V to 6.5V
n Independent shutdown control pins
Applications
n Cellular phones
n Pagers
n PDAs
n Handheld Instrumentation
n 3.3V to 5V Voltage Conversion Applications
Typical Application and Connection Diagram
Ordering Information
DS101141-1
Order Number
LM2686MTC
LM2686MTCX
Package Type
TSSOP-14
TSSOP-14
NSC Package
Drawing
MTC14
MTC14
DS101141-2
14-Pin TSSOP
Supplied As
94 Units, Rail
2.5k Units, Tape and Reel
© 1999 National Semiconductor Corporation DS101141
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