LTC1503-2 - High Efficiency Inductorless Step-Down DC/DC Converter

LTC1503-1.8 - High Efficiency Inductorless Step-Down DC/DC Converter - Linear Technology（凌力尔特）

The LTC®1503-1.8/LTC1503-2 are switched capacitor step-down DC/DC converters that produce a regulated output from a 2.4V to 6V input. The parts use switched capacitor fractional conversion to achieve high efficiency over the entire input range. No inductors are required. Internal circuitry controls the step-down conversion ratio to optimize efficiency as the input voltage and load conditions vary. Typical efficiency is 25% higher than that of a low dropout (LDO) linear regulator.Regulation is achieved by sensing the output voltage and enabling the internal switching network as needed to maintain a fixed output voltage. This method of regulation enables the parts to achieve high efficiency at extremely light loads. Low operating current (25µA with no load, 5µA in shutdown) and low external parts count (two 1µF flying capacitors and two 10µF bypass capacitors) make the LTC1503-1.8/LTC1503-2 ideally suited for space constrained battery-powered applications. The parts are fully short-circuit and overtemperature protected.The LTC1503-1.8/LTC1503-2 are available in 8-pin MSOP and SO packages.

Input Voltage Range: 2.4V to 6V

Fixed Output Voltages: 1.8V ±4%, 2V ±4%

Output Current: 100mA

No Inductors

Typical Efficiency 25% Higher than LDOs

Low Operating Current: 25µA

Low Shutdown Current: 5µA

600kHz Switching Frequency

Shutdown Disconnects Load from VIN

Soft-Start Limits Inrush Current at Turn-On

Short-Circuit and Overtemperature Protected

Available in 8-Pin MSOP and SO Packages

Cellular Phones

Handheld Computers

Smart Card Readers

Low Power DSP Supplies

Portable Electronic Equipment

Handheld Medical Instruments

器件型号	封装	温度	价格 (以 1 ~ 99 片为批量)	价格 (以 1000 片为批量)
LTC1503CMS8-1.8	MS-8	C	$2.20	$1.90
LTC1503CMS8-1.8#PBF	MS-8	C	$2.20	$1.90
LTC1503CMS8-1.8#TR	MS-8	C		$1.96
LTC1503CMS8-1.8#TRPBF	MS-8	C		$1.96
LTC1503CMS8-2	MS-8	C	$2.20	$1.90
LTC1503CMS8-2#PBF	MS-8	C	$2.20	$1.90
LTC1503CS8-1.8	SO-8	C	$2.00	$1.70
LTC1503CS8-1.8#PBF	SO-8	C	$2.00	$1.70
LTC1503CS8-1.8#TR	SO-8	C		$1.76
LTC1503CS8-1.8#TRPBF	SO-8	C		$1.76
LTC1503CS8-2	SO-8	C	$2.00	$1.70
LTC1503CS8-2#PBF	SO-8	C	$2.00	$1.70
LTC1503CS8-2#TR	SO-8	C		$1.76
LTC1503CS8-2#TRPBF	SO-8	C		$1.76
LTC1503IS8-1.8	SO-8	I	$2.45	$2.05
LTC1503IS8-1.8#PBF	SO-8	I	$2.45	$2.05
LTC1503IS8-1.8#TR	SO-8	I		$2.11
LTC1503IS8-1.8#TRPBF	SO-8	I		$2.11
LTC1503IS8-2	SO-8	I	$2.45	$2.05
LTC1503IS8-2#PBF	SO-8	I	$2.45	$2.05
LTC1503IS8-2#TR	SO-8	I		$2.11
LTC1503IS8-2#TRPBF	SO-8	I		$2.11

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