特点
High Efficiency
Constant Frequency 550kHz Operation
V
IN
Range: 2V to 10V
Multiampere Output Currents
OPTI-LOOP? Compensation Minimizes C
OUT
Selectable, Burst Mode Operation
Low Dropout Operation: 100% Duty Cycle
Synchronizable up to 750kHz
Current Mode Operation for Excellent Line and Load
Transient Response
Low Quiescent Current: 350μA
Shutdown Mode Draws Only 15μA Supply Current
±1.9% Reference Accuracy
Available in 8-Lead MSOP
典型应用
典型应用
描述
The LTC1622 boasts a ±1.9% output voltage accuracy and consumes only 350μA of quiescent current. For applications where efficiency is a prime consideration and the load current varies from light to heavy, the LTC1622 can be configured for Burst Mode? operation. Burst Mode operation enhances low current efficiency and extends battery run time. Burst Mode operation is inhibited during synchronization or when the SYNC/MODE pin is pulled low to reduce noise and possible RF interference.
High constant operating frequency of 550kHz allows the use of a small inductor. The device can also be synchronized up to 750kHz for special applications. The high frequency operation and the available 8-lead MSOP package create a high performance solution in an extremely small amount of PCB area.
To further maximize the life of the battery source, the P-channel MOSFET is turned on continuously in dropout (100% duty cycle). In shutdown, the device draws a mere 15μA.