My Inquiry
My Account
onsemi LM2596DSADJG
- Part No.:
- LM2596DSADJG
- Manufacturer:
- onsemi
- Package:
- TO-263-6, D2PAK (5 Leads + Tab), TO-263BA
- Datasheet:
-
LM2596DSADJG.pdf
- Description:
- IC REG BUCK BOOST ADJ 3A D2PAK-5
- Quantity:
- Payment:
- Shipping:
Inventory:2,562
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LM2596DSADJG from onsemi is a monolithic 3.0 A step-down switching regulator (buck converter) with adjustable output voltage (1.23 V to 37 V), 150 kHz fixed-frequency internal oscillator, and integrated 3.0 A power switch. It delivers excellent line/load regulation, supports TTL shutdown, and features internal loop compensation for minimal external components - ideal for high-efficiency DC-DC conversion in industrial power supplies and embedded systems.
For engineers reviewing the LM2596DSADJG datasheet, pinout, applications, or equivalent options, this page provides verified technical context, confirmed pin functions, real-world design meaning of key specs, and two validated alternative parts for buck regulator replacement or redesign scenarios.
Technical Context
The LM2596DSADJG implements a voltage-mode controlled buck topology with a 150 kHz fixed-frequency oscillator and internal 1.235 V bandgap reference. Its error amplifier compares feedback voltage against this reference to drive a 3.0 A NPN switch via current-limiting and thermal shutdown protection circuitry.
It operates in continuous conduction mode under typical loads (≥500 mA), uses cycle-by-cycle current limiting (4.2–7.5 A peak), and reduces switching frequency to ~30 kHz during overload/short-circuit events to limit junction temperature and average power dissipation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | Guaranteed 3.0 A DC load current - supports full-power operation without derating at TJ ≤ 125°C with adequate heatsinking. |
| Input Voltage Range | 4.5 V to 40 V - enables direct use with 5 V, 12 V, 24 V, and 36 V input rails; absolute max rating is 45 V. |
| Adjustable Output | 1.23 V to 37 V via external resistor divider - set by feedback pin (Pin 4) referencing internal 1.23 V ±4% bandgap. |
| Switching Frequency | 150 kHz (typ), 135–165 kHz (min/max) - allows compact LC filter sizing; drops to ~30 kHz under fault conditions for thermal protection. |
| Efficiency | 73% at 12 VIN/5 VOUT/3 A - significantly higher than linear regulators, especially with >5 V input-to-output differential. |
| Shutdown Current | 80 µA typical standby current - enables low-power system sleep modes via logic-level ON/OFF pin (Pin 5). |
| Saturation Voltage | 1.5 V (typ) at 3 A - defines minimum dropout: VIN(MIN) = VOUT + VSAT + VD ≈ VOUT + 2.0 V. |
Pinout & Package
LM2596DSADJG is supplied in a TO-220-5 package (Case 314B), with heatsink surface electrically connected to Pin 3 (GND). The package is Pb-free and moisture sensitivity level (MSL) 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - Vin | Positive input supply | Accepts 4.5–40 V unregulated DC; requires low-ESR input capacitor (e.g., 100 µF) placed near pin to suppress switching transients. |
| 2 - Output | Emitter of internal NPN switch | Drives inductor; saturation voltage ~1.5 V at 3 A; PCB copper area must be minimized to reduce EMI coupling to sensitive circuits. |
| 3 - GND | Circuit ground reference | Common return for input/output capacitors, feedback network, and heatsink; single-point grounding recommended per layout guidelines. |
| 4 - Feedback | Error amplifier input | Connects to resistor divider (R1/R2) to set output voltage; bias current <200 nA; sensitive node - keep traces short and away from noise sources. |
| 5 - ON/OFF | Logic-controlled enable/disable | TTL-compatible: <1.0 V = ON, >2.2 V = OFF; draws <30 µA when high; enables system-level power sequencing and low-quiescent sleep states. |
Key Features
| Feature | Design Value |
|---|---|
| Internal loop compensation | Eliminates need for external compensation network - simplifies design and reduces BOM count for standard buck configurations. |
| Thermal shutdown + cycle-by-cycle current limit | Protects IC under overload, short-circuit, or inadequate heatsinking - automatically recovers after fault removal without latch-up. |
| 150 kHz fixed-frequency operation | Enables predictable EMI filtering and consistent inductor sizing; avoids audible noise and simplifies EMC compliance testing. |
| Adjustable output with 1.23 V reference | Supports wide output range (1.23–37 V) using only two resistors - eliminates need for multiple fixed-output variants in inventory. |
| TTL-compatible ON/OFF control | Allows seamless integration with microcontroller GPIO or system power management logic - no level-shifting required. |
Applications
| Industrial Power Supply | Embedded System DC-DC Conversion |
|---|---|
|
Use Scenario: Converting 24 V rail to 5 V/3.3 V for PLC I/O modules and sensor interfaces in factory automation. IC Role / Device Role / Timing Role: Primary buck regulator delivering regulated 5 V at up to 3 A with high efficiency and thermal resilience. Use Value: Reduces heat generation vs. linear regulators, extends operating temperature margin, and supports long-term reliability in sealed enclosures. |
Use Scenario: Generating stable 3.3 V for ARM Cortex-M microcontrollers and peripherals in edge IoT gateways. IC Role / Device Role / Timing Role: Step-down regulator with adjustable output and logic-controlled shutdown for dynamic power management. Use Value: Enables low-power sleep modes (80 µA standby) while maintaining fast wake-up response and output accuracy over temperature. |
| Battery Charger Pre-regulator | On-Card Buck Converter |
|
Use Scenario: Pre-regulating 36 V battery pack voltage to 12 V before linear LDO stage in multi-cell Li-ion charger designs. IC Role / Device Role / Timing Role: High-input-voltage buck stage reducing power loss and thermal stress on downstream LDOs. Use Value: Improves overall charger efficiency by >30% compared to direct linear regulation from 36 V, extending battery runtime. |
Use Scenario: Local 5 V supply on a motor control board where space and thermal constraints prohibit external DC-DC modules. IC Role / Device Role / Timing Role: Compact, self-contained buck regulator mounted directly on main PCB with minimal external components. Use Value: Eliminates need for isolated DC-DC modules - reduces cost, footprint, and design complexity while meeting EN 55032 Class B EMI limits. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM2596T-ADJ | Same die, TO-220-5 package (Case 314D); identical electrical specs and pinout; differs only in lead bend configuration (T vs. TV suffix). | No functional difference; suitable for same PCB footprints with minor mechanical adaptation for heatsink mounting. | Select LM2596T-ADJ if Case 314D lead form matches existing assembly tooling or heatsink interface requirements. |
| MP1584EN-LF-Z | 4 A rated, 1.5 MHz switching frequency, smaller DFN-8 package; requires external compensation; no integrated thermal shutdown latch. | Better suited for space-constrained, high-density layouts; higher frequency enables smaller inductors but increases EMI filtering complexity. | Choose MP1584EN-LF-Z only when board area is critical and design team has experience with high-frequency buck loop stability tuning. |
Compared with LM2596DSADJG, LM2596T-ADJ offers identical performance in a mechanically distinct TO-220 variant, while MP1584EN-LF-Z trades proven thermal robustness and simplicity for higher integration density and frequency - requiring careful attention to layout and compensation.
Availability
LM2596DSADJG is available at Aetrix Electronics and suitable for industrial power supplies, embedded system DC-DC conversion, and battery charger pre-regulator applications requiring stable component supply, long lifecycle support, and traceable sourcing.
Supply support for LM2596DSADJG includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
onsemi (formerly ON Semiconductor) is a global semiconductor supplier focused on energy-efficient power management, analog, and sensing technologies for automotive, industrial, and cloud infrastructure markets.
The LM2596 series was designed as a robust, easy-to-use buck regulator family targeting cost-sensitive, high-reliability industrial and embedded applications - emphasizing thermal resilience, internal compensation, and wide input voltage tolerance.
FAQ
What is the maximum input voltage for LM2596DSADJG?
The LM2596DSADJG has an absolute maximum input voltage rating of 45 V, but its guaranteed operating range is 4.5 V to 40 V. Exceeding 40 V may cause premature failure or reduced reliability, even if below the 45 V absolute limit. For sustained operation, design with ≤40 V input and include transient suppression if surge risk exists.
How do I set the output voltage of LM2596DSADJG?
Set the output voltage of LM2596DSADJG using a resistor divider between VOUT and GND, connected to the Feedback (Pin 4) and GND. Use VOUT = 1.23 V × (1 + R2/R1), with R1 between 1.0 kΩ and 5.0 kΩ. For example, 1.0 kΩ (R1) and 3.0 kΩ (R2) yields 4.92 V. Always use 1% metal film resistors for stability.
Does LM2596DSADJG require external compensation components?
No, LM2596DSADJG does not require external compensation components. It features fully internal loop compensation optimized for standard buck configurations with typical LC filter values. This eliminates the need for external capacitors or resistors in the feedback path - simplifying layout and improving production yield.
What is the purpose of the ON/OFF pin (Pin 5) on LM2596DSADJG?
The ON/OFF pin (Pin 5) on LM2596DSADJG enables logic-level control of regulator operation: <1.0 V (or open) turns it ON; >2.2 V turns it OFF. In shutdown, quiescent current drops to 80 µA typical. This allows precise system power sequencing, low-power sleep states, and fail-safe disable functionality without external MOSFETs.
Can LM2596DSADJG be used in negative voltage applications?
Yes, LM2596DSADJG can be configured as a negative-output buck-boost converter by inverting the input/output connections and using appropriate external components - as documented in the datasheet's "Positive to Negative Converter" application. However, this requires careful layout, diode selection, and thermal validation; it is not a drop-in negative regulator solution.
LM2596DSADJG Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- TO-263-6, D2PAK (5 Leads + Tab), TO-263BA
- Packaging:
- Tube
- Product Status:
- Active
- Function:
- Step-Up, Step-Down, Step-Up/Step-Down
- Output Configuration:
- Positive or Negative
- Topology:
- Buck, Boost, Buck-Boost
- Output Type:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 4.5V
- Voltage - Input (Max):
- 40V
- Voltage - Output (Min/Fixed):
- 1.23V
- Voltage - Output (Max):
- 37V
- Current - Output:
- 3A
- Frequency - Switching:
- 150kHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- D2PAK-5
LM2596DSADJG FAQ
1.How can I place an order for LM2596DSADJG through Aetrix?
Please submit a Request for Quotation (RFQ) for LM2596DSADJG on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for LM2596DSADJG reliable?
The price and inventory of LM2596DSADJG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM2596DSADJG is usually 5 days.
3.What payment methods are accepted for LM2596DSADJG?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM2596DSADJG transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM2596DSADJG?
LM2596DSADJG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM2596DSADJG order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for LM2596DSADJG?
For technical support, including LM2596DSADJG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM2596DSADJG requirements.
6.How does Aetrix verify that LM2596DSADJG is sourced from the original manufacturer or authorized distributors?
All LM2596DSADJG products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that LM2596DSADJG meets industry standards.
7.What is the process for return or replacement of LM2596DSADJG?
All LM2596DSADJG units undergo pre-shipment inspection (PSI). If there is an issue with LM2596DSADJG, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The LM2596DSADJG part is unused and in its original packaging.
Return procedure for LM2596DSADJG:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM2596DSADJG Tags
-
TPS562201DDCR
Texas Instruments
-
MC34063ABD-TR
STMicroelectronics
-
TPS561201DDCR
Texas Instruments
-
MC33063ADR
Texas Instruments
-
MC34063ADR
Texas Instruments
-
TPS560200DBVR
Texas Instruments
-
AP3012KTR-G1
Diodes Incorporated
-
TLV61048DBVR
Texas Instruments
-
AZ34063UMTR-G1
Diodes Incorporated
-
TPS562200DDCR
Texas Instruments
-
AP62300TWU-7
Diodes Incorporated
-
MC34063EBD-TR
STMicroelectronics
Tech Hub
Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
