LM2833ZSD/NOPB Power Regulator IC Switching Voltage Regulators 1.5MHz/3MHz 3.0A Step-Down DC-DC Switc
digital voltage regulator ic
,electronic voltage regulator circuit
LM2833ZSD/NOPB Power Regulator IC Switching Voltage Regulators 1.5MHz/3MHz 3.0A Step-Down DC-DC Switc
FEATURES
- Input Voltage Range of 3.0V to 5.5V
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Output Voltage Range of 0.6V to 4.5V
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Tiny MSOP-PowerPAD 10 or WSON-10 Package
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3.0A Steady-State Output Current
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High Switching Frequencies
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– 1.5MHz (LM2833X)
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– 3.0MHz (LM2833Z)
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Enable Pin
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56mΩ PMOS Switch
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0.6V, 2% Internal Voltage Reference Over Line and Temperature
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Internal Soft-Start
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Internally Compensated Peak Current-Mode Control
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Cycle-by-Cycle Current Limit and Thermal Shutdown
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Frequency Foldback Protection
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Input Voltage UVLO (Under-Voltage Lockout)
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Output Over-Voltage Protection
APPLICATIONS
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Multimedia Set Top Box
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Broadband Communications
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Core Power in HDDs
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Data Acquisition/Telemetry
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USB Powered Devices
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DSL Modems
DESCRIPTION
The LM2833 regulator is a monolithic, high frequency, PWM step-down DC/DC converter available in a 10- pin WSON or MSOP-PowerPAD package. It contains all the active functions to provide local DC/DC conversion with fast transient response and accurate regulation in the smallest possible PCB area. With a minimum of external components, the LM2833 is easy to use. The ability to drive 3.0A loads with an internal 56 mΩ PMOS switch using state-of-the-art 0.5μm BiCMOS technology results in the best power density available. The world-class control circuitry allows on-times as low as 30ns, thus supporting exceptionally high frequency conversion over the entire 3V to 5.5V input operating range down to the minimum output voltage of 0.6V. Switching frequency is internally set to 1.5MHz or 3.0MHz, allowing the use of extremely small surface mount inductors and capacitors. Even though the operating frequency is high, efficiencies up to 93% are easy to achieve. External shutdown is included, featuring an ultra-low stand-by current of 300nA. The LM2833 utilizes peak current-mode control and internal compensation to provide high-performance regulation over a wide range of operating conditions. Additional features include internal soft-start circuitry to reduce inrush current, cycle-by-cycle current limit, frequency foldback, thermal shutdown, and output over-voltage protection.
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