LTC1517-3.3 - Micropower, Regulated 3.3V Charge Pump in a 5-Pin SOT-23 Package

The LTC1517-3.3 is a micropower charge pump DC/DC converter that produces a regulated 3.3V output. The input voltage range is 2V to 4.4V, allowing a single cell lithium battery to produce a regulated 3.3V output over the entire life of the battery. Extremely low operating current (typically 6µA with no load) and low external parts count (one 0.1µF flying capacitor and two small bypass capacitors at VIN and VOUT) make the part ideally suited for small, light load battery-powered applications. The total printed circuit board area of the application circuit shown below is only 0.045in2.

The part operates as a Burst Mode’ switched-capacitor voltage doubler to produce a regulated output. The part has thermal shutdown capability and can survive a continuous short circuit from VOUT to GND. The device is available in a 5-pin SOT-23 package.

Features

Ultralow Power: Icc = 6µA Typ
Short-Circuit/Thermal Protected
3.3V +/-4% Regulated Output
VIN Range: 2V to 4.4V
Output Current: 8mA (VIN >/=2V) 15mA (VIN >/=2.5V)
No Inductors
Ultrasmall Application Circuit (0.045in2)
700kHz Switching Frequency
Available in 5-Pin SOT-23

Typical Application

Applications

Cellular Telephones
Battery-Operated Equipment
Local Power Supplies
Handheld Instruments
PCMCIA Supplies

Packaging

Order Information

Part Number	Package	Temp	Price(1-99)	Price (1k)*
LTC1517CS5-3.3#PBF	SOT-23	C	$2.57
LTC1517CS5-3.3#TRMPBF	SOT-23	C	$2.57	$2.02
LTC1517CS5-3.3#TRPBF	SOT-23	C	$2.57	$2.00
LTC1517ES5-3.3#PBF	SOT-23	E	$2.31
LTC1517ES5-3.3#TRMPBF	SOT-23	E	$2.31	$2.13
LTC1517ES5-3.3#TRPBF	SOT-23	E	$2.31	$2.11