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LTC3412A

Linear Technology
Part Number LTC3412A
Manufacturer Linear Technology
Description Monolithic Synchronous Step-Down Regulator
Published Apr 19, 2010
Detailed Description FEATURES n High Efficiency: Up to 95% n 3A Output Current n Low Quiescent Current: 64µA n Low RDS(ON) Internal Switch: 7...
Datasheet PDF File LTC3412A PDF File

LTC3412A
LTC3412A

Overview
FEATURES n High Efficiency: Up to 95% n 3A Output Current n Low Quiescent Current: 64µA n Low RDS(ON) Internal Switch: 77mΩ n 2.
25V to 5.
5V Input Voltage Range n Programmable Frequency: 300kHz to 4MHz n ±2% Output Voltage Accuracy n 0.
8V Reference Allows Low Output Voltage n Selectable Forced Continuous/Burst Mode® Operation with Adjustable Burst Clamp n Synchronizable Switching Frequency n Low Dropout Operation: 100% Duty Cycle n Power Good Output Voltage Monitor n Overtemperature Protected n Available in 16-Lead Exposed Pad TSSOP and QFN Packages APPLICATIONS n Point-of-Load Regulation n Notebook Computers n Portable Instruments n Distributed Power Systems LTC3412A 3A, 4MHz, Monolithic Synchronous Step-Down Regulator DESCRIPTION The LTC®3412A is a high efficiency monolithic synchronous, step-down DC/DC converter utilizing a constant frequency, current mode architecture.
It operates from an input voltage range of 2.
25V to 5.
5V and provides a regulated output voltage from 0.
8V to 5V while delivering up to 3A of output current.
The internal synchronous power switch with 77mΩ on-resistance increases efficiency and eliminates the need for an external Schottky diode.
Switching frequency is set by an external resistor or can be synchronized to an external clock.
100% duty cycle provides low dropout operation extending battery life in portable systems.
OPTI-LOOP® compensation allows the transient response to be optimized over a wide range of loads and output capacitors.
The LTC3412A can be configured for either Burst Mode operation or forced continuous operation.
Forced continuous operation reduces noise and RF interference while Burst Mode operation provides high efficiency by reducing gate charge losses at light loads.
In Burst Mode operation, external control of the burst clamp level allows the output voltage ripple to be adjusted according to the application requirements.
L, LT, LTC, LTM, Burst Mode, OPTI-LOOP, Linear Technology and the Linear logo are registered tra...


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