LM317MSTT3G

ActiveVoltage Regulators - Linear, Low Drop Out (LDO) RegulatorsSOT-223

IC REG LIN POS ADJ 500MA SOT223

The LM317MSTT3G is a 3-pin adjustable positive voltage linear regulator from onsemi in SOT-223 package, capable of supplying over 500 mA with an output voltage range of 1.2 V to 37 V, featuring internal thermal shutdown and short-circuit protection.Checked against the datasheet

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Technical parameters

Key specs

Output voltage1.2 ~ 37 V

Output current500 mAMax · Typ 0.9 A (VI-VO ≤ 15 V，PD ≤ Pmax)，Typ 0.25 A (VI-VO = 40 V，TA = 25°C)

Input voltage≤ 40 V

Quiescent current10 mATyp

Datasheet-verified parameters

19 items

Parameter	Value and test conditions	Source
Output Voltage	1.2 V to 37 V
Output Current	In excess of 500 mA; Min 0.5 A, Typ 0.9 A (VI-VO ≤ 15 V, PD ≤ Pmax); Min 0.15 A, Typ 0.25 A (VI-VO = 40 V, TA = 25°C)
Input Voltage Range	Input-Output Voltage Differential (VI-VO): 40 Vdc (Max)
Package	SOT-223 (Pb-Free), Case 318E
Operating Temperature	TJ = 0°C to 125°C
Grade	Industrial (LM317M prefix); NCV prefix is AEC-Q100 Qualified
RoHS	Pb-Free Devices
Reference Voltage	Min 1.20 V, Typ 1.25 V, Max 1.30 V (3.0 V ≤ VI-VO ≤ 40 V, 10 mA ≤ IL ≤ 0.5 A, PD ≤ Pmax)
Adjustment Pin Current	Typ 50 μA, Max 100 μA
Line Regulation	Typ 0.01 %/V, Max 0.04 %/V (TA = 25°C, 3.0 V ≤ VI-VO ≤ 40 V)
Load Regulation	Typ 5.0 mV, Max 25 mV (VO ≤ 5.0 V); Typ 0.1 %VO, Max 0.5 %VO (VO ≥ 5.0 V) (TA = 25°C, 10 mA ≤ IO ≤ 0.5 A)
Ripple Rejection	Typ 65 dB (Without CAdj); Typ 66 dB, Min 80 dB (CAdj = 10 μF) (VO = 10 V, f = 120 Hz)
Thermal Shutdown	180 °C
Maximum Junction Temperature	+150 °C
Storage Temperature Range	-65 to +150 °C
Thermal Resistance, Junction-to-Air	245 °C/W (Plastic Package, ST Suffix, Case 318E)
Thermal Resistance, Junction-to-Case	15 °C/W (Plastic Package, ST Suffix, Case 318E)
Minimum Load Current	Typ 3.5 mA, Max 10 mA (VI-VO = 40 V)
Output Voltage Tolerance	4%

All parameters (21)ExpandCollapse

Power
Current - Output	500mA
Current - Quiescent (Iq)	10 mA
Voltage Dropout (Max)	-
Voltage - Input (Max)	40V
Voltage - Output (Max)	37V
Voltage - Output (Min/Fixed)	1.2V
AC and DC characteristics
PSRR	80dB ~ 65dB (120Hz)
Environment and package
Mounting Type	Surface Mount
Operating Temperature	0°C ~ 125°C (TJ)
Package	Tape & Reel (TR) Cut Tape (CT) Digi-Reel®
Package / Case	TO-261-4, TO-261AA
Supplier Device Package	SOT-223 (TO-261)
Other
Base Product Number	LM317
Control Features	-
Mfr	onsemi
Number of Regulators	1
Output Configuration	Positive
Output Type	Adjustable
Product Status	Active
Protection Features	Over Current, Over Temperature, Short Circuit
Series	-

Pinout and package

PackageSOT-223 (Pb-Free), Case 318E

Pin	Name	Function	Source
1		Adjust
2		Vout
3		Vin

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DatasheetDatasheet · 549.7 KB · 2026-10-29

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