0.6V, 2% internal voltage reference over line and temperature
Internal soft-start
Internally compensated peak current-mode control
Cycle-by-cycle current limit and thermal shutdown
Frequency foldback protection
Input voltage UVLO (Under-voltage lockout)
Output over-voltage protection
Description
The LM2833 regulator is a monolithic, high frequency, PWM step-down DC/DC converter available in a 10-pin LLP or eMSOP 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.
The LM2833X eMSOP Demo Board is designed to demonstrate the capabilities of the LM2833X 1.5MHz switching regulator in the eMSOP-10 package.
The demo board is configured to provide an output of 1.2V at up to 3A from an input voltage range of 3V to 5.5V. The board is thermally optimized with the small solution size of 1.2" X 1.1". The output voltage can be configured to a different value by changing the ratio between R1 and R2 according to the following equation:
R1 = R2 x (VOUT / VFB - 1)
The feedback voltage VFB is regulated at 0.60V typically. The board has C5 reserved for two purposes given different application scenarios. First, at high VOUT applications, the control loop bandwidth is not as large as the low VOUT. Adding C5 at high VOUT can significantly improve the load step response by boosting the loop bandwidth without significantly compromising phase margin. Secondly, it also helps to minimize output voltage overshoot during sluggish startup, short circuit release, and recovery from thermal shutdown, since it creates a feed-forward path between VOUT and VFB, thus speeding up Gm-amplifier recovery.
Another component which is not populated on the board is C4, which is reserved for applications where a large output capacitor is desired.
Contents:
LM2833XMY Assembled Evaluation Board
Application Note 1717 for the LM2833XMY Evaluation Board
The LM2833X LLP Demo Board is designed to demonstrate the capabilities of the LM2833X 1.5MHz switching regulator in the LLP-10 package.
The demo board is configured to provide an output of 1.2V at up to 3A from an input voltage range of 3V to 5.5V. The board is thermally optimized with the small solution size of 1.2" X 1.1". The output voltage can be configured to a different value by changing the ratio between R1 and R2 according to the following equation:
R1 = R2 x (VOUT / VFB - 1)
The feedback voltage VFB is regulated at 0.60V typically. The board has C5 reserved for two purposes given different application scenarios. First, at high VOUT applications, the control loop bandwidth is not as large as the low VOUT. Adding C5 at high VOUT can significantly improve the load step response by boosting the loop bandwidth without significantly compromising phase margin. Secondly, it also helps to minimize output voltage overshoot during sluggish startup, short circuit release, and recovery from thermal shutdown, since it creates a feed-forward path between VOUT and VFB, thus speeding up Gm-amplifier recovery.
Another component which is not populated on the board is C4, which is reserved for applications where a large output capacitor is desired.
Contents:
LM2833XSD Assembled Evaluation Board
Application Note 1843 for the LM2833XSD Evaluation Board
The LM2833Z eMSOP Demo Board is designed to demonstrate the capabilities of the LM2833Z 3MHz switching regulator in the eMSOP-10 package.
The demo board is configured to provide an output of 1.2V at up to 3A from an input voltage range of 3V to 5.5V. The board is thermally optimized with the small solution size of 1.2" X 1.1". The output voltage can be configured to a different value by changing the ratio between R1 and R2 according to the following equation:
R1 = R2 x (VOUT / VFB - 1)
The feedback voltage VFB is regulated at 0.60V typically. The board has C5 reserved for two purposes given different application scenarios. First, at high VOUT applications, the control loop bandwidth is not as large as the low VOUT. Adding C5 at high VOUT can significantly improve the load step response by boosting the loop bandwidth without significantly compromising phase margin. Secondly, it also helps to minimize output voltage overshoot during sluggish startup, short circuit release, and recovery from thermal shutdown, since it creates a feed-forward path between VOUT and VFB, thus speeding up Gm-amplifier recovery.
Another component which is not populated on the board is C4, which is reserved for applications where a large output capacitor is desired.
Contents:
LM2833ZMY Assembled Evaluation Board
Application Note 1844 for the LM2833ZMY Evaluation Board
The LM2833Z LLP Demo Board is designed to demonstrate the capabilities of the LM2833Z 3MHz switching regulator in the LLP-10 package.
The demo board is configured to provide an output of 1.2V at up to 3A from an input voltage range of 3V to 5.5V. The board is thermally optimized with the small solution size of 1.2" X 1.1". The output voltage can be configured to a different value by changing the ratio between R1 and R2 according to the following equation:
R1 = R2 x (VOUT / VFB - 1)
The feedback voltage VFB is regulated at 0.60V typically. The board has C5 reserved for two purposes given different application scenarios. First, at high VOUT applications, the control loop bandwidth is not as large as the low VOUT. Adding C5 at high VOUT can significantly improve the load step response by boosting the loop bandwidth without significantly compromising phase margin. Secondly, it also helps to minimize output voltage overshoot during sluggish startup, short circuit release, and recovery from thermal shutdown, since it creates a feed-forward path between VOUT and VFB, thus speeding up Gm-amplifier recovery.
Another component which is not populated on the board is C4, which is reserved for applications where a large output capacitor is desired.
Contents:
LM2833ZSD Assembled Evaluation Board
Application Note 1845 for the LM2833ZSD Evaluation Board
LM2833 Datasheet
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Note: The Early Failure Rates (EFR) were calculated as point estimate PPM based on rejects and sample size for EFR.
The Long Term Failure Rates were calculated
at 60% confidence using the Arrhenius equation at 0.7eV activation energy and derating the assumed stress
temperature of 150°C to an application temperature of 55°C.
For more information on Reliability Metrics, please click here.
