(China (Mainland))
Product Summary
The LTC1772ES6 is a constant frequency current mode stepdown DC/DC controller providing excellent AC and DC load
and line regulation. The device incorporates an accurate undervoltage lockout feature that shuts down the LTC1772ES6 when the input voltage falls below 2.0V. The LTC1772ES6 provides a ±2.5% output voltage accuracy and consumes only 270μA of quiescent current. For applications where efficiency is a prime consideration, the LTC1772ES6 is configured for Burst Mode operation, which enhances efficiency at low output current. To further maximize the life of a battery source, the external P-channel MOSFET is turned on continuously in dropout (100%dutycycle).In shutdown, the device draws a mere 8μA. High constant operating frequency of 550kHz allows the use of a small external inductor.
Parametrics
LTC1772ES6 absolute maximum ratings: (1)Input Supply Voltage (VIN): –0.3V to 10V; (2)SENSE–, PGATE Voltages: –0.3V to (VIN + 0.3V); (3)VFB, ITH /RUN Voltages: –0.3V to 2.4V; (4)PGATE Peak Output Current (<10μs): 1A; (5)Storage Ambient Temperature Range: –65℃ to 150℃; (6)Junction Temperature (Note 3): 150℃; (7)Lead Temperature (Soldering, 10 sec): 300℃.
Features
LTC1772ES6 features: (1)High Efficiency: Up to 94%; (2)High Output Currents Easily Achieved; (3)Wide VIN Range: 2.5V to 9.8V; (4)Constant Frequency 550kHz Operation; (5)Burst ModeR Operation at Light Load; (6)Low Dropout: 100% Duty Cycle; (7)Tiny 6-Lead SOT-23 Package; (8)0.8V Reference Allows Low Output Voltages; (9)Current Mode Operation for Excellent Line and Load Transient Response; (10)Low Quiescent Current: 270μA; (11)Shutdown Mode Draws Only 8μA Supply Current; (12)±2.5% Reference Accuracy.
Diagrams
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 LTC1772ES6#TR |
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IC REG CTRLR BUCK PWM CM SOT23-6 |
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LTC1772ES6#TRM |
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IC REG CTRLR BUCK PWM CM SOT23-6 |
Data Sheet |
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LTC1772ES6#TRMPBF |
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IC REG CTRLR BUCK PWM CM SOT23-6 |
Data Sheet |
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LTC1772ES6#TRPBF |
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IC REG CTRLR BUCK PWM CM SOT23-6 |
Data Sheet |
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