Electronic Components Datasheet Search |
|
MAX6329VL Datasheet(PDF) 8 Page - Maxim Integrated Products |
|
MAX6329VL Datasheet(HTML) 8 Page - Maxim Integrated Products |
8 / 11 page logic low on MR asserts reset while the regulator is still within tolerance. Reset remains asserted while MR is low and for the reset timeout period (100ms min) after MR returns high. The MR input has an internal pullup of 20k Ω (typ) to OUT. This input can be driven with TTL/CMOS logic levels or with open-drain/collector outputs. Connect a normally open momentary switch from MR to GND to create a manual reset function; external debounce cir- cuitry is not required. If MR is driven from long cables or the device is used in a noisy environment, connect a 0.1µF capacitor from MR to GND to provide additional noise immunity. Reverse Leakage Protection An internal circuit monitors the input and output volt- ages. When the output voltage is greater than the input voltage, the internal pass transistor and parasitic diodes turn off. OUT powers the device. There is no leakage path from OUT to IN. Therefore, the output can be powered from an auxiliary supply such as a backup battery without any need for additional blocking diodes. Current Limit The MAX6329/MAX6349 include a current limiter that monitors and controls the pass transistor’s gate voltage, limiting the output current to 350mA (typ). The output can be shorted to ground for an indefinite period without damaging the part. Thermal Overload Protection When the junction temperature exceeds TJ = +160°C, the thermal sensor signals the shutdown logic, turning off the pass transistor and allowing the IC to cool. The thermal sensor will turn the pass transistor on again after the IC’s junction temperature cools by 20°C, resulting in a pulsed output during continuous thermal- overload conditions. Thermal overload protection is designed to protect the MAX6329/MAX6349 in the event of fault conditions. For continuous operation, do not exceed the absolute maximum junction temperature rating of TJ = +150°C. Operating Region and Power Dissipation The MAX6329/MAX6349s’ maximum power dissipation depends on the thermal resistance of the case and cir- cuit board, the temperature difference between the die junction and the ambient air, and the rate of airflow. The power dissipation across the device is: P = IOUT (VIN - VOUT) The maximum power dissipation is: PMAX = (TJ - TA) / ( θJB + θBA) where TJ - TA is the temperature difference between the die junction and the surrounding air, θJB (or θJC) is the thermal resistance of the package, and θBA is the ther- mal resistance through the printed circuit board, copper traces, and other materials to the surrounding air. The MAX6329/MAX6349s’ ground pin (GND) performs the dual function of providing an electrical connection to the system ground and channeling heat away. Connect GND to the system ground using a large pad or ground plane. Applications Information Output Voltage Selection The MAX6329/MAX6349 feature dual mode operation: they operate in either a preset voltage mode or an adjustable mode. In preset voltage mode, internal feedback resistors set the MAX6329/MAX6349 to +3.3V, +2.5V, or +1.8V (see Selector Guide). Select this mode by connecting SET to ground. In adjustable mode, select an output between 1.23V to 5.0V using two external resistors connected as a voltage divider to SET (Figure 1). The output voltage is set by the following equation: VOUT = VSET (1 + R1/R2) where VSET = 1.23V. To simplify resistor selection: R1 = R2 (VOUT/VSET - 1) Choose R2 ≥ 100kΩ to optimize power consumption, accuracy, and high-frequency power-supply rejection. Since the VSET tolerance is typically less than ±30mV, the output can be set using fixed resistors instead of variable resistors. In preset voltage mode, impedance between SET and ground should be less than 50k Ω. 150mA, SOT23, Low Dropout Linear Regulators with Internal Microprocessor Reset Circuit 8 _______________________________________________________________________________________ |
Similar Part No. - MAX6329VL |
|
Similar Description - MAX6329VL |
|
|
Link URL |
Privacy Policy |
ALLDATASHEET.NET |
Does ALLDATASHEET help your business so far? [ DONATE ] |
About Alldatasheet | Advertisement | Contact us | Privacy Policy | Link Exchange | Manufacturer List All Rights Reserved©Alldatasheet.com |
Russian : Alldatasheetru.com | Korean : Alldatasheet.co.kr | Spanish : Alldatasheet.es | French : Alldatasheet.fr | Italian : Alldatasheetit.com Portuguese : Alldatasheetpt.com | Polish : Alldatasheet.pl | Vietnamese : Alldatasheet.vn Indian : Alldatasheet.in | Mexican : Alldatasheet.com.mx | British : Alldatasheet.co.uk | New Zealand : Alldatasheet.co.nz |
Family Site : ic2ic.com |
icmetro.com |