LTC3832/LTC3832-1
High Power Step-Down
Synchronous DC/DC Controllers
for Low Voltage Operation
U
FEATURES
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DESCRIPTIO
The LTC®3832/LTC3832-1 are high power, high efficiency switching regulator controllers optimized for
3.3V-5V to 0.6V-3.xV step-down applications. A precision internal reference and feedback system provide
±1% output regulation over temperature, load current
and line voltage variations. The LTC3832/LTC3832-1 use
a synchronous switching architecture with N-channel
MOSFETs. Additionally, the chip senses output current
through the drain-source resistance of the upper
N-channel MOSFET, providing an adjustable current limit
without a current sense resistor.
VOUT as Low as 0.6V
High Power Switching Regulator Controller
for 3.3V-5V to 0.6V-3.xV Step-Down Applications
No Current Sense Resistor Required
Low Input Supply Voltage Range: 3V to 8V
Maximum Duty Cycle > 91% Over Temperature
All N-Channel External MOSFETs
Excellent Output Regulation: ±1% Over Line, Load
and Temperature Variations
High Efficiency: Over 95% Possible
Adjustable or Fixed 2.5V Output (LTC3832)
Programmable Fixed Frequency Operation: 100kHz to
500kHz
External Clock Synchronization
Soft-Start
Low Shutdown Current: 91% over temperature. They include a fixed frequency
PWM oscillator for low output ripple operation. The 300kHz
free-running clock frequency can be externally adjusted or
synchronized with an external signal from 100kHz to 500kHz.
In shutdown mode, the LTC3832 supply current drops to
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