My Inquiry
My Account
Texas Instruments LM2594HVM-ADJ/NOPB
- Part No.:
- LM2594HVM-ADJ/NOPB
- Manufacturer:
- Texas Instruments
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LM2594HVM-ADJ/NOPB.pdf
- Description:
- IC REG BUCK ADJ 500MA 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:626
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LM2594HVM-ADJ/NOPB from Texas Instruments is a nonsynchronous step-down DC-DC converter IC designed for high-input-voltage industrial and automotive power supplies. It delivers 0.5-A output current with ±4% output voltage accuracy, supports 4.5 V to 60 V input range, features 150-kHz fixed-frequency operation, and provides adjustable output from 1.2 V to 37 V (57 V for HV version) in an 8-pin SOIC package.
For engineers reviewing the LM2594HVM-ADJ/NOPB datasheet, LM2594HVM-ADJ/NOPB pinout, LM2594HVM-ADJ/NOPB application, or LM2594HVM-ADJ/NOPB equivalent, key selection considerations include input voltage headroom up to 60 V, ON/OFF logic control threshold at 1.3 V, feedback bias current of 10–50 nA, thermal shutdown protection, and compatibility with standard off-the-shelf inductors.
Technical Context
The LM2594HVM-ADJ/NOPB integrates a PWM controller, power switch, oscillator, and error amplifier in a single monolithic IC. Its internal architecture uses a fixed-frequency, current-mode control scheme with two-stage frequency-reducing current limiting and thermal shutdown for fault protection.
It operates in continuous or discontinuous conduction mode depending on load and inductor selection, supports TTL-compatible shutdown via the ON/OFF pin (1.3 V threshold), and regulates output by sensing feedback voltage at the FB pin referenced to an internal 1.23 V bandgap reference.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5 V to 60 V - supports wide-range industrial and automotive battery inputs without external pre-regulation. |
| Output Current | 0.5 A - ensures stable regulation under full-load conditions with adequate thermal margin in SOIC package. |
| Feedback Reference | 1.23 V ±2.7% - sets output voltage via external resistor divider; enables precise programmability from 1.2 V to 37 V. |
| Switching Frequency | 150 kHz ±15% - fixed internal oscillator enables predictable EMI filtering and simplifies inductor selection. |
| Quiescent Current | 140–250 μA - low standby consumption extends battery life in always-on systems. |
| Standby Current | 85 μA - achieved when ON/OFF pin is pulled above 1.3 V, minimizing system-level power draw during sleep. |
| Current Limit | 0.65–1.3 A peak - two-stage limiting reduces switching frequency under overload, preventing thermal runaway. |
Pinout & Package
LM2594HVM-ADJ/NOPB is housed in an 8-pin surface-mount SOIC package (D package), 4.90 mm × 3.91 mm body size, with exposed pad not present and no thermal pad. Pin 1–3 are NC (no internal connection but soldered for mechanical stability); pins 4–8 define functional interface.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3 | No Connection | Internally unconnected; must be soldered to PCB for mechanical integrity and heat transfer. |
| 4 | Feedback Input | Senses output voltage via resistor divider; regulates output by comparing to 1.23 V internal reference. |
| 5 | ON/OFF Control | Logic-level shutdown: ≤1.3 V = ON, ≥1.3 V = OFF; draws only 5–15 μA in either state. |
| 6 | Ground | Power and signal reference return path; requires low-impedance connection to minimize noise coupling. |
| 7 | +VIN Supply | Primary input power rail; requires local 68-μF tantalum bypass capacitor to handle high di/dt switching currents. |
| 8 | Switch Output | Internal NPN switch collector; connects to external catch diode and inductor; swings between VIN−VSAT and −0.5 V. |
Key Features
| Feature | Design Value |
|---|---|
| Wide Input Range (4.5–60 V) | Enables direct operation from 12 V, 24 V, and 48 V industrial buses without pre-regulators. |
| Adjustable Output (1.2–37 V) | Supports custom rail generation across diverse subsystems using only two external resistors. |
| TTL-Compatible Shutdown | Allows microcontroller or system-level logic to enable/disable regulation with minimal external circuitry. |
| Thermal & Current Protection | Prevents damage during short-circuit or overtemperature events without requiring external monitoring circuits. |
| Fixed-Frequency 150-kHz Operation | Simplifies EMI filter design and ensures consistent inductor sizing across designs. |
Applications
| Industrial Power Supply | Automotive Body Control Module |
|---|---|
Use Scenario: Generating 5 V or 3.3 V from a 24 V truck battery with high line transients and temperature extremes. IC Role / Device Role / Timing Role: Primary buck regulator providing isolated, regulated DC rails for microcontrollers and sensors. Use Value: Withstands 60 V input surges per ISO 7637-2, maintains ±4% output accuracy over −40°C to +125°C, and shuts down cleanly during cold-crank events. | Use Scenario: Powering CAN transceivers and door-lock actuators from a 12 V vehicle battery subject to load-dump spikes. IC Role / Device Role / Timing Role: Pre-regulator stepping down battery voltage before LDOs, reducing heat dissipation in downstream linear regulators. Use Value: Delivers 0.5 A at >80% efficiency, limits input current during startup via ON/OFF pin delay, and survives 60 V load-dump transients without latch-up. |
| Programmable Test Equipment | POS Terminal Power Management |
Use Scenario: Providing user-configurable 3–24 V output rails in portable calibration instruments powered by Li-ion packs. IC Role / Device Role / Timing Role: Adjustable-output DC-DC stage enabling flexible analog front-end biasing and digital core supply. Use Value: Achieves 1.2 V to 37 V programmability with <50 nA feedback bias current, ensuring stable setpoint accuracy across battery discharge cycles. | Use Scenario: Converting 12 V wall adapter input to 5 V/3.3 V rails for embedded payment processors and display drivers. IC Role / Device Role / Timing Role: Compact, cost-effective buck converter replacing discrete switcher designs in space-constrained retail hardware. Use Value: Requires only four external components (inductor, diode, two capacitors), fits in <1 cm² PCB area, and meets EN 55032 Class B conducted emissions with standard layout. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM2594MX-ADJ/NOPB | Same architecture but rated for 40 V max input; lacks HV process optimization for >45 V operation. | Suitable for 5–36 V input systems only; not recommended where 60 V transients occur. | Select LM2594HVM-ADJ/NOPB when input may exceed 45 V; use LM2594MX-ADJ/NOPB for lower-cost 36 V-rated designs. |
| LMR36506RNXR | Synchronous buck with 3–65 V input, 0.6 A output, integrated FETs, and 2.1 MHz switching. | Delivers higher efficiency (>90%) and smaller solution size but requires more complex layout and compensation. | Choose LMR36506RNXR for new designs prioritizing efficiency and footprint; retain LM2594HVM-ADJ/NOPB for legacy compatibility and simplicity. |
Compared with LM2594MX-ADJ/NOPB, LM2594HVM-ADJ/NOPB adds 20 V input headroom and enhanced transient robustness; versus LMR36506RNXR, it trades higher efficiency and frequency for simpler external component count and proven reliability in long-lifecycle industrial deployments.
Availability
LM2594HVM-ADJ/NOPB is available at Aetrix Electronics and suitable for industrial automation controllers, automotive body electronics, and programmable test equipment requiring stable component supply across extended product lifecycles.
Supply support for LM2594HVM-ADJ/NOPB 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
Texas Instruments is a global semiconductor company specializing in analog and embedded processing technologies, with decades of leadership in power management ICs.
The LM2594xx family was engineered for rugged, low-component-count DC-DC conversion in harsh environments-targeting industrial, automotive, and telecom infrastructure where reliability and wide input range outweigh ultra-high efficiency demands.
FAQ
What is the maximum input voltage rating for LM2594HVM-ADJ/NOPB?
The LM2594HVM-ADJ/NOPB has an absolute maximum input voltage rating of 60 V, with recommended operating range from 4.5 V to 60 V. This HV rating distinguishes it from the standard LM2594 series (40 V max) and enables use in 48 V industrial buses and automotive load-dump scenarios. The device sustains this rating through optimized high-voltage process technology and internal protection circuitry.
How does the ON/OFF pin function on LM2594HVM-ADJ/NOPB?
The ON/OFF pin on LM2594HVM-ADJ/NOPB provides logic-level shutdown control: pulling the pin below 1.3 V (typical) enables regulation, while pulling it above 1.3 V disables switching and reduces total supply current to 85 μA. The pin accepts voltages up to 25 V and draws only 5–15 μA, making it compatible with microcontroller GPIOs or simple resistor-divider networks without additional level-shifting.
What output voltage range can be programmed with LM2594HVM-ADJ/NOPB?
The LM2594HVM-ADJ/NOPB supports an adjustable output voltage range of 1.2 V to 37 V under normal operation, and up to 57 V in high-voltage configurations. This is achieved using a resistor divider from output to FB pin and ground, referencing the internal 1.23 V bandgap. Output accuracy remains within ±4% across line, load, and temperature variations per datasheet specifications.
Does LM2594HVM-ADJ/NOPB require an external catch diode?
Yes, LM2594HVM-ADJ/NOPB requires an external catch diode connected from the SW (pin 8) to output. As a nonsynchronous buck converter, it relies on this diode to provide a current path during the switch-off phase. TI recommends Schottky diodes for low-VIN applications due to lower forward voltage, and fast-recovery diodes for higher input voltages to minimize reverse recovery losses.
What thermal performance can be expected from LM2594HVM-ADJ/NOPB in SOIC package?
In its 8-pin SOIC (D) package, LM2594HVM-ADJ/NOPB has a junction-to-ambient thermal resistance (RθJA) of 150°C/W on a standard 4-layer JEDEC board. At 0.5 A output and 12 V input, typical power dissipation is ~0.55 W, resulting in ~83°C junction rise above ambient. Derating is required above 85°C ambient; thermal shutdown activates at 150°C junction temperature to prevent permanent damage.
LM2594HVM-ADJ/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- SIMPLE SWITCHER®
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 4.5V
- Voltage - Input (Max):
- 60V
- Voltage - Output (Min/Fixed):
- 1.2V
- Voltage - Output (Max):
- 57V
- Current - Output:
- 500mA
- Frequency - Switching:
- 150kHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
LM2594HVM-ADJ/NOPB FAQ
1.How can I place an order for LM2594HVM-ADJ/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM2594HVM-ADJ/NOPB 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 LM2594HVM-ADJ/NOPB reliable?
The price and inventory of LM2594HVM-ADJ/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM2594HVM-ADJ/NOPB is usually 5 days.
3.What payment methods are accepted for LM2594HVM-ADJ/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM2594HVM-ADJ/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM2594HVM-ADJ/NOPB?
LM2594HVM-ADJ/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM2594HVM-ADJ/NOPB 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 LM2594HVM-ADJ/NOPB?
For technical support, including LM2594HVM-ADJ/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM2594HVM-ADJ/NOPB requirements.
6.How does Aetrix verify that LM2594HVM-ADJ/NOPB is sourced from the original manufacturer or authorized distributors?
All LM2594HVM-ADJ/NOPB 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 LM2594HVM-ADJ/NOPB meets industry standards.
7.What is the process for return or replacement of LM2594HVM-ADJ/NOPB?
All LM2594HVM-ADJ/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM2594HVM-ADJ/NOPB, 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 LM2594HVM-ADJ/NOPB part is unused and in its original packaging.
Return procedure for LM2594HVM-ADJ/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM2594HVM-ADJ/NOPB 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
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…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
