TLV1117-50IDRJRG4

PMIC - Voltage Regulators - Linear

TLV1117-50IDRJRG4 is a low-power positive linear voltage regulator specifically for applications requiring up to 50mA. It is secure in the environmental conditions from -40° C to 85° C with integrated over-temperature protection and current-limiting circuitry.

Application Field

TLV1117-50IDRJRG4 can be used in number of applications, such as laptop, mobile phone or MP3 players, where circuit board space and power are limited. Typical applications include boosting battery voltage, powering on/off control circuits, providing precise output calibrations or voltage references, or driving ADCs or DACs. It has a wide input voltage range and can be used in power supplies at various levels of regulation.

Working Principle

The TLV1117-50IDRJRG4 uses a Negative-True-Logic, or NTL, scheme to convert higher input voltages to a lower output voltage. This scheme relies on transistors, resistors and a feedback loop to control the output voltage. The resistors set a reference voltage which the feedback loop responds to when the input voltage rises above or falls below the reference voltage. The TLV1117-50IDRJRG4 has additional protection circuitry, including over-temperature protection, current and over-voltage protection, and output-voltage limiter for short circuits.

In the NTL scheme, the regulator operates in two different levels depending on the input voltage. The first level is known as "transconductance" and it is at this level that the voltage is converted from a higher input voltage to a lower output voltage. The second level is "switching" and this is when the regulator adjusts the duty cycle, or pulse width, of the output voltage to maintain a constant output voltage regardless of the changes in temperature or input voltage.

The TLV1117-50IDRJRG4 includes an on-chip programmable current limit, thermal shutdown, and an output voltage that is accuracy-controlled to within ±1.5%. It also offers low output noise and low power consumption in all operating conditions. The device also has an externally selectable power-save mode, so that current consumption is minimized when no load is present.

Conclusion

TLV1117-50IDRJRG4 is an efficient, low-power linear voltage regulator specifically designed for applications that require up to 50mA. It has a wide input voltage range and can be used in power supplies at various levels of regulation. It relies on a NTL scheme to convert higher input voltages to a lower output voltage, and has protections such as over-temperature protection and current-limiting circuitry. It also offers low output noise and low power consumption in all operating conditions.