NCP700BSN18T1G

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Overview

The NCP700BSN18T1G is a fixed-output 1.8 V low dropout linear regulator from the NCP700B series, manufactured by onsemi. It delivers up to 200 mA output current with an input voltage range of 2.5 V to 5.5 V. The device utilizes an advanced BiCMOS process to achieve ultra-low noise and high power supply rejection ratio (PSRR). It operates within a junction temperature range of -40 °C to 125 °C and features thermal shutdown and current limit protection.

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Feature Summary

• Ultra-low noise performance suitable for RF applications
• High power supply rejection ratio at 1 kHz
• Logic enable pin for low-power sleep mode control
• Active discharge circuitry for fast turn-off response

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Applications

• Cellular telephone power amplifiers
• Noise-sensitive RF circuits
• Precision instrumentation
• Battery-powered portable devices

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Procurement Notes

Verify the SN suffix indicates the TSOP-5 package configuration. Confirm the 18 suffix corresponds to the 1.8 V fixed output voltage. Ensure the T1G suffix denotes tape and reel packaging. Cross-reference the ordering code with official manufacturer documentation to validate component specifications before procurement.

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Selection Notes

Select this component when ultra-low noise and high PSRR are critical for RF signal integrity. The TSOP-5 package offers a compact footprint for space-constrained designs. Verify that the required output current does not exceed 200 mA and that the input voltage remains within the specified 2.5 V to 5.5 V range for stable operation.

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Part Context

This part belongs to the NCP700B family of LDO regulators designed for noise-sensitive applications. The series combines bipolar elements for dynamic performance with CMOS technology for low ground current consumption. It is optimized for battery-operated portable electronics requiring clean power supplies.

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Replacement Considerations

Direct replacements include other NCP700B variants with different output voltages or packages, such as NCP700BSN25T1G or NCP700BWDFN6xxxT1G. Ensure any substitute maintains the same output current capability and package dimensions for board compatibility.

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators FAQ

How is the enable function controlled?

The EN pin controls the device state. A voltage below 0.4 V turns the device off, while a voltage above 1.2 V turns it on. An internal pull-down resistor ensures the device disables if the pin is floating.

What is the purpose of the BYP pin?

The BYP pin allows connection of a noise reduction capacitor to the bandgap reference node. This reduces output noise and improves PSRR, with minimum recommended values of 10 nF or 100 nF.