LTC1514 - Step-Up/Step-Down Switched Capacitor DC/DC Converters with Low-Battery Comparator

Features

• 3.3V or 5V Output Voltages
• 2V to 10V Input Voltage Range
• Up to 50mA Output Current
• Only Three External Capacitors Required
• Soft Start Limits Inrush Current at Turn-On
• Low Operating Current: 60µA
• Low Shutdown Current: 10µA
• Shutdown Disconnects Load from V_IN
• Short-Circuit and Overtemperature Protected
• 650kHz Switching Frequency
• Low-Battery Comparator Active in Shutdown
• Available in SO-8 Package

Typical Application

Description

The LTC1514-3.3/LTC1514-5 are micropower switched capacitor DC/DC converters that produce a regulated output voltage by either stepping up or stepping down the input voltage. Output voltage is fixed at either 3.3V (LTC1514-3.3) or 5V (LTC1514-5) by an internal resistor divider.A unique architecture allows the parts to accommodate a wide input voltage range (2V to 10V) while maintaining +/-4% regulation. Additional circuitry prevents excessive inrush current and output voltage ripple when large V_IN to V_OUT differentials are present.An internal uncommitted comparator is kept active in shutdown. The comparator has an open-drain output for flexible interfacing.The parts are short-circuit and overtemperature protected. Battery life is maximized by very low operating currents (I_CC= 60µA typ, 10µA in shutdown). Both parts are available in an SO-8 package.

Packaging

SO-8

Order Info

• Part numbers ending in PBF are lead free. Please contact LTC marketing for information on lead based finish parts.
• Part numbers containing TR or TRM are shipped in tape and reel or 500 unit mini tape and reel, respectively
• Please refer to our general ordering information or the product datasheet for more details

Package Variations and Pricing

Part Number	Package	Pins	Temp	Price (1-99)	Price (1k)*	RoHS Data
LTC1514CS8-3.3	SO	8	C	$4.35	$3.50	View
LTC1514CS8-3.3#PBF	SO	8	C	$4.35	$3.50	View
LTC1514CS8-3.3#TR	SO	8	C		$3.56	View
LTC1514CS8-3.3#TRPBF	SO	8	C		$3.56	View
LTC1514CS8-5	SO	8	C	$4.35	$3.50	View
LTC1514CS8-5#PBF	SO	8	C	$4.35	$3.50	View
LTC1514CS8-5#TR	SO	8	C		$3.56	View
LTC1514CS8-5#TRPBF	SO	8	C		$3.56	View
LTC1514IS8-3.3	SO	8	I	$5.25	$3.50	View
LTC1514IS8-3.3#PBF	SO	8	I	$5.25	$3.50	View
LTC1514IS8-3.3#TR	SO	8	I		$3.56	View
LTC1514IS8-3.3#TRPBF	SO	8	I		$3.56	View
LTC1514IS8-5	SO	8	I	$5.25	$3.50	View
LTC1514IS8-5#PBF	SO	8	I	$5.25	$3.50	View
LTC1514IS8-5#TR	SO	8	I		$3.56	View
LTC1514IS8-5#TRPBF	SO	8	I		$3.56	View
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^* The USA list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Linear Technology sales office or authorized distributor.

Applications

• Battery Operated Equipment
• Smart Card Readers
• Local Power Supplies
• Handheld Instruments
• Battery Backup Supplies

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