LM2596S-ADJ

ActiveVoltage Regulators - DC DC Switching RegulatorsTO-263

STEP-DOWN TYPE -40~+125@(TA) 1 S

LM2596S-ADJ is a 3A step-down switching regulator with up to 40V input, adjustable output (1.2V-37V), 150kHz switching frequency, TO-263 package, featuring TTL shutdown, thermal shutdown, and current limit protection.Checked against the datasheet

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Technical parameters

Key specs

Input voltage≤ 45 V4.5V ≤ VIN ≤ 40V (Operating)

Output voltage1.2 ~ 37 VVREF = 1.230V Typ

Output current3 AMax

Switching frequency150 kHz

Datasheet-verified parameters

21 items

Parameter	Value and test conditions	Source
Input Voltage Range	4.5V ≤ VIN ≤ 40V (Operating), Max 45V (Absolute)
Output Voltage	1.2V to 37V (Adjustable), VREF = 1.230V Typ
Output Current	3A (Guaranteed)
Switching Frequency	150 kHz Typ (110 kHz Min / 173 kHz Max)
Package	TO-263 (5-lead)
Operating Temperature	-40°C ≤ TA ≤ 125°C
Quiescent Current	5 mA Typ, 10 mA Max
Standby Quiescent Current	80 µA Typ, 200 µA Max (ON/OFF pin = 5V)
Current Limit	4.5 A Typ (3.6 A Min / 6.9 A Max)
Saturation Voltage	1.16 V Typ, 1.4 V Max (IOUT = 3A)
Feedback Voltage	1.230 V Typ (1.193 V Min / 1.267 V Max)
Efficiency	73 % Typ (VIN = 12V, VOUT = 3V, ILOAD = 3A)
Max Duty Cycle	100 %
Min Duty Cycle	0 %
Output Leakage Current	50 µA Max (Output = 0V), 30 mA Max (Output = -1V)
Thermal Resistance (Junction to Case)	2 °C/W
Thermal Resistance (Junction to Ambient)	50 °C/W (TO-263, Note 12)
Absolute Maximum Rating - Max Supply Voltage	45V (LM2596)
Absolute Maximum Rating - Storage Temperature Range	-65°C to +150°C
ESD Susceptibility (Human Body Model)	2kV
Protection Features	Thermal shutdown, Current limit, TTL shutdown

All parameters (20)ExpandCollapse

Power
Current - Output	3A
Voltage - Input (Max)	40V
Voltage - Input (Min)	-
Voltage - Output (Max)	37V
Voltage - Output (Min/Fixed)	1.2V
AC and DC characteristics
Frequency - Switching	150kHz
Environment and package
Mounting Type	Surface Mount
Operating Temperature	-40°C~125°C(TA)
Package	Tape & Reel (TR); Cut Tape (CT); Digi-Reel®
Package / Case	TO-263-6, D²Pak (5 Leads + Tab), TO-263BA
Supplier Device Package	TO-263-5L
Other
Function	Step-Down
Mfr	UMW
Number of Outputs	1
Output Configuration	Positive
Output Type	Adjustable
Product Status	Active
Series	LM2596
Synchronous Rectifier	No
Topology	Buck

Pinout and package

Pin	Name	Function
1		Vin (Input supply voltage)
2		Output (Switching output)
3		Gnd (Ground)
4		Feedback (Output voltage feedback)
5	ON/OFF	(ON/OFF shutdown, Active is Low or floating)

Documents

DatasheetDatasheet · 3.6 MB · 2026-10-27

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Datasheet-verified content is extracted by AI from the manufacturer datasheet. Click a page number to view the original.