Question 1

What is a thermal shutdown circuit? (Linear Regulators (LDO Regulators))

Accepted Answer

The Thermal Shutdown Circuit detects overheating of the regulator if the output pin (VOUT) is shorted to the ground pin (GND) and stops the regulator operation to protect it from damage.

Question 2

What is a Output voltage external setting? (Linear Regulators (LDO Regulators))

Accepted Answer

Output voltage external setting is a function that sets the output voltage by using an external feedback resistor.

Question 3

What is the supply voltage divided output? (Linear Regulators (LDO Regulators))

Accepted Answer

The supply voltage divided output is a function that divides the input voltage (Vin) of the regulator into Vin/2 or Vin/3 and outputs the voltage. For example, this function makes it possible that the IC connects to a low voltage microcontroller A/D converter directly and the microcontroller monitors a battery voltage.

Question 4

What is a discharge shunt circuit ? (Linear Regulators (LDO Regulators))

Accepted Answer

The discharge shunt function compresses the output voltage fall time during power-off. The discharge shunt circuit quickly discharges the charge of the output capacitor to bring the output pin to VSS level in a short time.

Question 5

What is a  Inrush current limit circuit? (Linear Regulators (LDO Regulators))

Accepted Answer

Inrush current is a large current that temporarily flows when a linear regulator (LDO regulator) starts up, which may cause unstable operation of the equipment.The inrush current limit circuit limits the inrush current for a certain period of time.

Question 6

What is a Output noise? (Linear Regulators (LDO Regulators))

Accepted Answer

Output noise is the noise generated by the linear regulator (LDO regulator) IC itself.

Question 7

What is  a Reverse current protection function? (Linear Regulators (LDO Regulators))

Accepted Answer

The reverse current protection function prevents current from flowing from the output to the input side when the potential of the output side becomes higher than that of the input side.

Question 8

What is a Soft Start? (Linear Regulators (LDO Regulators))

Accepted Answer

Soft-start is function for slowly starting the output power. ABLIC's products are available with output voltage rise time adjustable with an external capacitor or with time fixed internally in the IC.

Question 9

What is a PSRR? (Linear Regulators (LDO Regulators))

Accepted Answer

PSRR is an acronym for Power Supply Rejection Ratio.it refers to the ability to block the transmission of ripple voltage from the input source to the output side in linear regulators (LDO regulators),

Question 10

What is a Over Current Protection? (Linear Regulators (LDO Regulators))

Accepted Answer

Over Current protection is a protection circuit that turns off the output when a large current flows through the regulator, such as when there is a short between the output terminal and the ground terminal, to prevent destruction.

Question 11

What is a Synchronous rectification? (Switching Regulators (DC-DC Converters))

Accepted Answer

Synchronous rectification is a switching regulator technology that increases efficiency by synchronously switching two MOSFETs on the high-side and low-side sides.

Question 12

What is the supply voltage divided output? (Voltage Detectors (Reset ICs))

Accepted Answer

The supply voltage divided output is a function that divides the sense pin voltage (Vsense) of the regulator into Vsense/6, Vsense/8, Vsense/12 or Vsense/14 and outputs the voltage. For example, this function makes it possible that the IC connects to a low voltage microcontroller A/D converter directly and the microcontroller monitors a battery voltage.

Question 13

What is the manual reset function? (Voltage Detectors (Reset ICs))

Accepted Answer

The manual reset function is a function that can forcibly output a reset signal by inputting a signal to the MR (Manual Reset) pin of the reset IC.By utilizing this function, the reset signal can be switched regardless of voltage. For example, by connecting the MR pin to an external switch of an electronic device, the output of the reset IC can be controlled at the user's will.

Question 14

What is  the detection voltage input pin (SENSE pin) ? (Voltage Detectors (Reset ICs))

Accepted Answer

The voltage input to the SENSE pin, not the supply voltage of the reset IC, is monitored and detected. By providing a separate input pin for the monitored voltage from the VDD pin (=power supply pin), the reset IC is not affected by the monitored voltage and can stably output a reset signal even if the monitored voltage drops to 0V.

Question 15

What is a Detection delay time/Release delay time? (Voltage Detectors (Reset ICs))

Accepted Answer

The "detection delay time" refers to the time from when the voltage of the monitored object falls below the detection voltage to when the reset signal is output. On the other hand, the "release delay time" refers to the time from when the voltage reaches the detector threshold to when the reset signal is released.

Question 16

What is a PWM/PFM? (Switching Regulators (DC-DC Converters))

Accepted Answer

PWM is an acronym for Pulse Width Modulation.PWM method controls the output voltage by varying the pulse width with a fixed frequency.PFM is an acronym for Pulse Frequency Modulation.PFM method controls the output voltage by varying the frequency while keeping the pulse width fixed.

Question 17

What is a spread spectrum? (Switching Regulators (DC-DC Converters))

Accepted Answer

The spread spectrum function modulates the switching frequency to broaden the frequency distribution of EMI and reduce the peak value of EMI.

Question 18

How to calculate Min and Max of　Release delay time (Watchdog Timers)

Accepted Answer

The following is an example of release delay time Min, Typ, and Max by CDLY capacity.Refer to "2. Release delay time and monitoring time adjustment capacitor (CDLY)" in "? Selection of External Parts" for the details on datasheet. The parameters used in the calculation are trd and CDLY.trd Min, Typ, and Max are listed in ?  Electrical Characteristics 2. Detector blockSubstitute Min, Typ, and Max into the expression.

Question 19

How to calculate Min and Max of　Watchdog trigger time (Watchdog Timers)

Accepted Answer

The following is an example of Watchdog trigger time Min, Typ, and Max by CDLY capacity.Refer to "2. Release delay time and monitoring time adjustment capacitor (CDLY)" in "? Selection of External Parts" for the details on datasheet. The parameters used in the calculation are tWI,tr and CDLY.tWI,tr Min, Typ, and Max are listed in ?  Electrical Characteristics 3. Watchdog timer blockSubstitute Min, Typ, and Max into the expression.

Question 20

How to calculate Min and Max of　Watchdog output "L" time (Watchdog Timers)

Accepted Answer

The following is an example of Watchdog output "L" time Min, Typ, and Max by CDLY capacity.Refer to "2. Release delay time and monitoring time adjustment capacitor (CDLY)" in "? Selection of External Parts" for the details on datasheet. The parameters used in the calculation are tWD,L and CDLY.tWD,L Min, Typ, and Max are listed in ?  Electrical Characteristics 3. Watchdog timer blockSubstitute Min, Typ, and Max into the expression.

Question 21

How to calculate Min and Max of　Release delay time (Watchdog Timers)

Accepted Answer

The following is an example of release delay time Min, Typ, and Max by CDLY capacity.Refer to "2. Release delay time and monitoring time adjustment capacitor (CDLY)" in "? Selection of External Parts" for the details on datasheet. The parameters used in the calculation are trd and CDLY.trd Min, Typ, and Max are listed in ?  Electrical Characteristics 2. Detector blockSubstitute Min, Typ, and Max into the expression.Datasheet link：

Question 22

How to calculate Min and Max of　Watchdog trigger time (Watchdog Timers)

Accepted Answer

The following is an example of Watchdog trigger time Min, Typ, and Max by CDLY capacity.Refer to "2. Release delay time and monitoring time adjustment capacitor (CDLY)" in "? Selection of External Parts" for the details on datasheet. The parameters used in the calculation are tWI,tr and CDLY.tWI,tr Min, Typ, and Max are listed in ?  Electrical Characteristics 3. Watchdog timer blockSubstitute Min, Typ, and Max into the expression.Datasheet link：

Question 23

How to calculate Min and Max of　Watchdog output "L" time (Watchdog Timers)

Accepted Answer

The following is an example of Watchdog output "L" time Min, Typ, and Max by CDLY capacity.Refer to "2. Release delay time and monitoring time adjustment capacitor (CDLY)" in "? Selection of External Parts" for the details on datasheet. The parameters used in the calculation are tWD,L and CDLY.tWD,L Min, Typ, and Max are listed in ?  Electrical Characteristics 3. Watchdog timer blockSubstitute Min, Typ, and Max into the expression.Datasheet link：

Question 24

How to calculate Min and Max of　Watchdog double-pulse
detection time (Watchdog Timers)

Accepted Answer

The following is an example of Watchdog double-pulse detection time Min, Typ, and Max by CDLY capacity.Refer to "2. Release delay time and monitoring time adjustment capacitor (CDLY)" in "? Selection of External Parts" for the details on datasheet. The parameters used in the calculation are tWI,dp and CDLY.tWI,dp Min, Typ, and Max are listed in ?  Electrical Characteristics 3. Watchdog timer blockSubstitute Min, Typ, and Max into the expression.

Question 25

What is the Power-saving function (PS function)? (Lithium-ion Battery Protection ICs)

Accepted Answer

Power-saving function is a function that forcibly stops discharging by inputting an external signal to the PS pin and greatly reduces the current consumption of the IC.By setting into power saving mode before shipping, it is possible to reduce battery consumption and prevent deep discharge during the inventory period.The conditions for entering and exiting PS mode are defined by the duration of active signal input to the PS pin and the VM pin voltage level.For detailed conditions, please refer to the data sheet of each product ”■ Operation - 6. Power saving function".

Question 26

What is the Cell balancing function? (Lithium-ion Battery Protection ICs)

Accepted Answer

The cell-balance function is a feature that corrects the voltage imbalance among individual cells connected in series. When multiple cells are used in series and undergo repeated charging and discharging cycles, the characteristic variation of lithium-ion batteries can lead to differences (imbalances) in the voltage of each cell, resulting in shorter operating time as a battery pack.The cell-balance function, during the charging cycle, bypasses the charging path of cells that have reached the cell balance detection voltage, thus correcting the potential difference between cells. Some products also have cell balancing functions during discharge. For detailed operation, please refer to the datasheet of each product.

Question 27

What is the Battery voltage monitor pin (BS pin)? (Lithium-ion Battery Protection ICs)

Accepted Answer

The BS pin is for accurately monitoring the cell voltage.As the charging and discharging currents increase, a difference in voltage between P- and Vss.The BS pin is connected to the VSS pin inside the IC via resistor RBSS during charging and normal operation, so it is not affected by the charging and discharging currents. Therefore, it is possible to monitor the cell voltage using the voltage between the P+ and BS pins, even during fast charging.For detailed conditions, please refer to the data sheet of each product ”■ Operation - 7. Battery voltage monitor pin (BS pin) ".

Question 28

What is "INTpin output function" ? (Voltage Tracker)

Accepted Answer

The INT pin output function monitors the IC status and outputs a signal from the INT pin of the Nch open drain output. The states that can be monitored are: overvoltage(Vout≥VOVD), short  to ground (Iout≥ILIMD), thermal shutdown (Tj≥TSD)

FAQ Frequently Asked Questions

Product Category

What is a thermal shutdown circuit?

What is a Output voltage external setting?

What is the supply voltage divided output?

What is a discharge shunt circuit ?

What is a Inrush current limit circuit?

What is a Output noise?

What is a Reverse current protection function?

What is a Soft Start?

What is a PSRR?

What is a Over Current Protection?

What is a Synchronous rectification?

What is the supply voltage divided output?

What is the supply voltage divided output?

What is the manual reset function?

What is the detection voltage input pin (SENSE pin) ?

What is a Detection delay time/Release delay time?

What is a PWM/PFM?

What is a spread spectrum?

How to calculate Min and Max of　Release delay time

How to calculate Min and Max of　Watchdog trigger time

How to calculate Min and Max of　Watchdog output "L" time

How to calculate Min and Max of　Release delay time

How to calculate Min and Max of　Watchdog trigger time

How to calculate Min and Max of　Watchdog output "L" time

How to calculate Min and Max of　Release delay time

How to calculate Min and Max of　Watchdog trigger time

How to calculate Min and Max of　Watchdog output "L" time

How to calculate Min and Max of　Watchdog double-pulse detection time

What is the Power-saving function (PS function)?

What is the Cell balancing function?

What is the manual reset function?

What is the Battery voltage monitor pin (BS pin)?

What is "INTpin output function" ?