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SPX3819M5-L

Key datasheet specifications and the closest alternatives, ranked by parametric similarity and grounded in the manufacturer datasheet.

01 — Overview

This datasheet covers the SPX3819 family, a 500mA low-noise LDO voltage regulator available in fixed or adjustable output configurations. The document details electrical specifications, pinouts, and applications for portable consumer and industrial equipment. Key parameters include a dropout voltage of 340mV at full load, quiescent current as low as 90µA, output noise of 40µV RMS, and an initial tolerance under 1%. It also highlights features like reverse battery protection, thermal shutdown, and availability in SOT-23, SOIC, and DFN packages.

02 — Key specifications

Datasheet parameters

ParameterMinTypMaxConditions
quiescent current — 50 nA 3 µA VENABLE≤ 0.4V
output voltage — 10 mV 60 mV
output current — 500 mA —
supply voltage range — — 400 mV OFF
operating temperature -40 °C — 125 °C
standby current — 50 nA —
psrr — 70 dB —
dropout voltage — 340 mV —
output noise voltage — 300 µV — IL = 10mA, CL = 1.0μF, CIN = 1μF, (10Hz – 100kHz)
output count — 1 —
03 — Alternatives

Closest matches to SPX3819M5-L

AP2127K-3.3TRG1 16.2× higher supply voltage range, 5.0× lower output noise voltage, 4.1× higher dropout voltage
TLV758P 9.4× higher supply voltage range, 5.7× lower output noise voltage, 2.1× higher dropout voltage
SPX5205M5-L-5.0 3.3× lower output current, 1.6× lower dropout voltage, similar operating temperature
AP2112-1.2 10.6× higher supply voltage range, 6.0× lower output noise voltage, 5.0× lower standby current
AZ1117C-3.3 3.5× higher dropout voltage, 3.0× lower output noise voltage, 2.0× higher output current
L78M05ABV 7.5× lower output noise voltage, 5.9× higher dropout voltage, 1.1× lower psrr
LD1117-3.3 3.0× lower output noise voltage, 2.9× higher dropout voltage, 1.6× higher output current
RT9193-33GB 10.0× higher supply voltage range, 5.0× lower standby current, 3.0× lower output noise voltage
04 — FAQ

Frequently asked questions

What is the dropout voltage of the SPX3819M5-L?

The dropout voltage is 340 mV.

What is the maximum operating temperature for the SPX3819M5-L?

The maximum operating temperature is 125 °C.

What is the output count for the SPX3819M5-L?

The output count is 1.

What is the output current of the SPX3819M5-L?

The output current is 500 mA.

What is the output noise voltage when IL = 10mA, CL = 1.0μF, CIN = 1μF, and the frequency range is 10Hz – 100kHz?

The output noise voltage is 300 µV.

What is the output voltage tolerance?

The output voltage tolerance is 10 mV.

What is the Power Supply Rejection Ratio (PSRR) of the SPX3819M5-L?

The PSRR is 70 dB.

What is the quiescent current when VENABLE≤ 0.4V?

The quiescent current is 50 nA when VENABLE≤ 0.4V.

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