Build with RT9080 — Datasheet Specs & AI Design Help

Q: What is the operating temperature for the RT9080?

The operating temperature is 85 °C at Ambient Temperature Range.

Q: What is the output noise voltage of the RT9080 when COUT = 1µF, ILOAD = 150mA, BW = 10Hz to 100kHz, VIN = VOUT+1V, and VOUT = 0.8V?

The output noise voltage is 26 µV.

Q: What is the quiescent current when ILOAD = 0mA, VOUT≤ 5.5V, and VIN≥ VOUT+ VDROP?

The quiescent current is 2 µA.

Q: What is the supply voltage range for the RT9080 when VIN = 5V and the device is enabled?

The supply voltage range is 400 mV.

00 — Overview

What the RT9080 does

The RT9080x family comprises low-dropout linear regulators delivering up to 600mA output current with input voltages from 1.2V to 5.5V. These devices feature a 2μA ground current at no load, 75dB PSRR at 1kHz, and a dropout voltage of 0.31V at full load. The RT9080 variant lacks a sense pin, while the RT9080N includes it for precision feedback. Both operate with fixed outputs from 0.8V to 3.3V or adjustable settings. They support portable battery equipment, microcontrollers, and notebook computers. Built-in protections include current limiting, over-temperature shutdown, and stable operation with ceramic or tantalum capacitors across miniaturized TSOT-23-5 and ZQFN-4L packages.

Next step

Start building with RT9080 → Every number above is cited straight from the datasheet — ask what they mean for your design, and the assistant answers from the same source documents.

01 — Key specifications

Datasheet parameters

Datasheet parameters for RT9080
Parameter	Min	Typ	Max	Conditions	Source
quiescent current	—	2 µA	4 µA	ILOAD = 0mA, VOUT≤ 5.5VVIN≥ VOUT+ VDROP; vccconsumpti; Electrical Characteristics	Richtek datasheet, p. 4 — Electrical Characteristics
output voltage	800 mV	—	3.3 V		Richtek datasheet, p. 4 — Electrical Characteristics
output current	610 mA	1.1 A	—	VOUT = 90%VOUT(Normal); Electrical Characteristics	Richtek datasheet, p. 5 — Electrical Characteristics
supply voltage range	—	—	400 mV	VIN = 5V; enable; Electrical Characteristics	Richtek datasheet, p. 5 — Electrical Characteristics
operating temperature	-40 °C	—	85 °C	Ambient Temperature Range	Richtek datasheet, p. 4
psrr	—	75 dB	—	VIN = 3V, ILOAD = 50mA, COUT = 1μF, VOUT = 2.5V, f = 1kHz; Electrical Characteristics	Richtek datasheet, p. 5 — Electrical Characteristics
dropout voltage	—	1.05 V	1.33 V	0.8V ≤ VOUT< 1.05V (TSOT-23-5); (note 5); Electrical Characteristics	Richtek datasheet, p. 4 — Electrical Characteristics
output noise voltage	—	26 µV	—	COUT = 1µF, ILOAD = 150mA, BW = 10Hz to 100kHz, VIN = VOUT+1V, VOUT = 0.8V	Richtek datasheet, p. 5 — Electrical Characteristics
output count	—	1	—		Richtek datasheet, p. 1

02 — Alternatives

Closest matches to RT9080

RT9078N-08GJ5 3.7× higher supply voltage range, 1.9× higher operating temperature, 1.8× lower output current

AP2112 10.0× lower standby current, 4.7× higher supply voltage range, 1.9× higher output noise voltage

TLV758P 12.5× higher quiescent current, 4.2× higher supply voltage range, 2.0× higher output noise voltage

AP2127-3.3 4.7× higher supply voltage range, 2.4× lower output current, 2.3× higher output noise voltage

TLV757P 12.5× higher quiescent current, 6.7× lower standby current, 5.8× higher output noise voltage

AP2127-1.0 4.7× higher supply voltage range, 2.4× lower output current, 2.3× higher output noise voltage

AZ1117-5.0 16.7× higher supply voltage range, 5.8× higher output noise voltage, 2.4× higher output voltage

L7805AB 2.6× lower output noise voltage, 2.4× higher output voltage, 1.9× higher dropout voltage

03 — FAQ

Frequently asked questions

What is the dropout voltage for the RT9080 when 0.8V ≤ VOUT< 1.05V (TSOT-23-5)?

The dropout voltage is 1.05 V.

What is the operating temperature for the RT9080?

The operating temperature is 85 °C at Ambient Temperature Range.

What is the output count of the RT9080?

The output count is 1.

What is the output current when VOUT = 90%VOUT(Normal)?

The output current is 1.1 A.

What is the output noise voltage of the RT9080 when COUT = 1µF, ILOAD = 150mA, BW = 10Hz to 100kHz, VIN = VOUT+1V, and VOUT = 0.8V?

The output noise voltage is 26 µV.

What is the output voltage of the RT9080?

The output voltage is 3.3 V.

What is the PSRR of the RT9080 at VIN = 3V, ILOAD = 50mA, COUT = 1μF, VOUT = 2.5V, and f = 1kHz?

The PSRR is 75 dB.

What is the quiescent current when ILOAD = 0mA, VOUT≤ 5.5V, and VIN≥ VOUT+ VDROP?

The quiescent current is 2 µA.

What is the supply voltage range for the RT9080 when VIN = 5V and the device is enabled?

The supply voltage range is 400 mV.