Build with RT9193 — Datasheet Specs & AI Design Help

00 — Overview

What the RT9193 does

The RT9193-x is a 300mA, ultra-low noise CMOS LDO regulator available in fixed output voltages from 1.5V to 5.0V plus an adjustable version, packaged in SC-70-5, SOT-23-5, TSOT-23-5, WDFN-6L, and MSOP-8. It operates with a wide input voltage range of 2.5V to 5.5V and features a maximum dropout of 220mV at full load. The device delivers 1.3MHz gain bandwidth, maintains less than 0.01μA standby current in shutdown, and supports a quick start-up time of 50μs. Engineers typically use this regulator in portable RF and wireless applications, battery-powered equipment, and hand-held instruments where space and low noise are critical. It requires only a 1μF output capacitor for stability and includes TTL-logic-controlled shutdown.

Next step

Start building with RT9193 → 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 RT9193
Parameter	Min	Typ	Max	Conditions	Source
quiescent current	—	90 µA	130 µA	VEN≥ 1.2V, IOUT = 0mA; Electrical Characteristics	Richtek datasheet, p. 3 — Electrical Characteristics
output voltage	—	1.5 V	—		Richtek datasheet, p. 1
output current	—	300 mA	—		Richtek datasheet, p. 3 — Electrical Characteristics
supply voltage range	2.5 V	—	5.5 V		Richtek datasheet, p. 3
operating temperature	-40 °C	—	85 °C		Richtek datasheet, p. 3
standby current	—	10 nA	1 µA	VEN = GND, Shutdown; Electrical Characteristics	Richtek datasheet, p. 3 — Electrical Characteristics
psrr	—	-70 dB	—	COUT = 1µF, IOUT = 10mA; Electrical Characteristics	Richtek datasheet, p. 4 — Electrical Characteristics
dropout voltage	—	170 mV	200 mV	IOUT = 200mA, VOUT> 2.8V; (note 5); Electrical Characteristics	Richtek datasheet, p. 3 — Electrical Characteristics
output noise voltage	—	100 µV	—	10Hz to 100kHz, IOUT = 200mACOUT = 1µF; Electrical Characteristics	Richtek datasheet, p. 4 — Electrical Characteristics
output count	—	1	—		Richtek datasheet, p. 2 — Functional Pin Description

02 — Alternatives

Closest matches to RT9193

AP2112 5.9× higher dropout voltage, 2.0× higher output current, 2.0× lower output noise voltage

AP2127-1.0 10.0× higher standby current, 8.2× higher dropout voltage, 1.7× lower output noise voltage

RT9013-1.2 3.6× lower quiescent current, 3.3× lower output noise voltage, 1.7× higher output current

AP2127-3.3 10.0× higher standby current, 8.2× higher dropout voltage, 2.2× higher output voltage

TLV757P 7.9× higher dropout voltage, 5.2× higher output current, 3.6× lower quiescent current

MIC5205 2.3× higher supply voltage range, 2.0× lower output current, 1.9× higher operating temperature

SPX5205 5.0× higher standby current, 3.0× higher output noise voltage, 2.0× lower output current

SPX5205M5-L-5.0 5.0× higher standby current, 3.0× higher output noise voltage, 2.0× lower output current

03 — FAQ

Frequently asked questions

What is the dropout voltage of the RT9193-1.5?

The dropout voltage is 170 mV at IOUT = 200mA and VOUT > 2.8V.

What is the maximum operating temperature for the RT9193-1.5?

The operating temperature is 85 °C.

What is the output count for the RT9193-1.5?

The output count is 1.

What is the output current of the RT9193-1.5?

The output current is 300 mA.

What is the output noise voltage of the RT9193-1.5?

The output noise voltage is 100 µV when measured from 10Hz to 100kHz with IOUT = 200mA and COUT = 1µF.

What is the output voltage of the RT9193-1.5?

The output voltage is 1.5 V.

What is the PSRR specification for the RT9193-1.5?

The PSRR is -70 dB when COUT = 1µF and IOUT = 10mA.

What is the quiescent current when VEN≥ 1.2V and IOUT = 0mA?

The quiescent current is 90 µA.

What is the standby current when VEN = GND and the device is in Shutdown?

The standby current is 10 nA.

What is the maximum supply voltage for the RT9193-1.5?

The maximum supply voltage is 5.5 V.