LTC3527 Series

Dual 800mA/400mA, 1.2MHz/2.2MHz Synchronous Step-Up DC/DC Converters

Catalog

Dual 800mA/400mA, 1.2MHz/2.2MHz Synchronous Step-Up DC/DC Converters

Part	Voltage - Input (Max) [Max]	Output Configuration	Voltage - Output (Max) [Max]	Function	Package / Case	Operating Temperature [Max]	Operating Temperature [Min]	Voltage - Input (Min) [Min]	Mounting Type	Supplier Device Package	Topology	Current - Output	Voltage - Output (Min/Fixed)	Number of Outputs	Output Type
Analog Devices LTC3527EUD#PBF	5 V	Positive	5.25 V	Step-Up	16-WFQFN Exposed Pad	85 °C	-40 °C	0.88 V	Surface Mount	16-QFN (3x3)	Boost	400 mA 800 mA	1.6 V	2	Adjustable
Analog Devices LTC3527EUD-1#PBF	5 V	Positive	5.25 V	Step-Up	16-WFQFN Exposed Pad	85 °C	-40 °C	0.88 V	Surface Mount	16-QFN (3x3)	Boost	400 mA 800 mA	1.6 V	2	Adjustable
Analog Devices LTC3527EUD-1#PBF	5 V	Positive	5.25 V	Step-Up	16-WFQFN Exposed Pad	85 °C	-40 °C	0.88 V	Surface Mount	16-QFN (3x3)	Boost	400 mA 800 mA	1.6 V	2	Adjustable
Analog Devices LTC3527EUD#TRPBF	5 V	Positive	5.25 V	Step-Up	16-WFQFN Exposed Pad	85 °C	-40 °C	0.88 V	Surface Mount	16-QFN (3x3)	Boost	400 mA 800 mA	1.6 V	2	Adjustable
Analog Devices LTC3527EUD-1#TRPBF	5 V	Positive	5.25 V	Step-Up	16-WFQFN Exposed Pad	85 °C	-40 °C	0.88 V	Surface Mount	16-QFN (3x3)	Boost	400 mA 800 mA	1.6 V	2	Adjustable

Catalog

Dual 800mA/400mA, 1.2MHz/2.2MHz Synchronous Step-Up DC/DC Converters

Key Features

• Dual Synchronous Step-Up DC/DC Converters

• Delivers 3.3V at 200mA/100mA from one Alkaline/NiMH Cell, or 3.3V at 400mA/200mA from Two Cells

• VINStart-Up Voltage: 700mV

• 0.5V to 5V VINRange After Start-Up

• 1.6V to 5.25V VOUTRange

• Output Disconnect in Shutdown

• VIN> VOUTOperation

• 1.2MHz or 2.2MHz Operation

• Up to 94% Efficiency

• 12μA Quiescent Current in Burst Mode®Operation

• Inrush Current Limiting and Soft-Start

• Internal Synchronous Rectifiers

• Logic-Controlled Shutdown (< 2μA)

• Quick VOUTDischarge (LTC3527-1)

• 16-Lead, 0.75mm × 3mm × 3mm QFN Package

Description

The LTC3527/LTC3527-1 are dual high efficiency, step-up DC/DC converters in a space saving 16-lead 3mm × 3mm QFN package. Battery life is maximized with a 700mV startup voltage and operation down to 500mV once started. TheSHDNand PGOOD pins enable the converters to be sequenced or started together.The LTC3527/LTC3527-1 limit inrush current during startup. Selectable 1.2MHz or 2.2MHz operation provides a choice between the highest efficiency or smallest solution footprint. The current mode PWM design is internally compensated reducing external parts count. Burst Mode operation or fixed frequency operation is selectable via the MODE pin. Anti-ring circuitry reduces EMI in discontinuous mode. This device also features thermal shutdown.True output disconnect allows the output to be completely open in shutdown. The LTC3527-1 actively discharges VOUT1or VOUT2when its respectiveSHDNgoes low. Quiescent current in shutdown is less than 2μA.ApplicationsMP3/Personal Media PlayersNoise Canceling/Bluetooth HeadsetsWireless MicePortable Medical Instruments