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Texas Instruments LM2590HVS-ADJ/NOPB
- Part No.:
- LM2590HVS-ADJ/NOPB
- Manufacturer:
- Texas Instruments
- Package:
- TO-263-8, D2PAK (7 Leads + Tab), TO-263CA
- Datasheet:
-
LM2590HVS-ADJ/NOPB.pdf
- Description:
- IC REG BUCK ADJ 1A TO263
- Quantity:
- Payment:
- Shipping:
Inventory:223
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Product details
Overview
LM2590HVS-ADJ/NOPB from Texas Instruments is a monolithic 1-A, 150-kHz non-synchronous step-down (buck) DC-DC converter with adjustable output (1.2 V to 57 V), 60-V maximum input voltage, and integrated shutdown/soft-start and error flag functions. It delivers stable regulation under industrial temperature range (–40°C to +125°C) and supports high-efficiency power conversion in rugged off-line or automotive pre-regulator applications.
For engineers reviewing the LM2590HVS-ADJ/NOPB datasheet, LM2590HVS-ADJ/NOPB pinout, LM2590HVS-ADJ/NOPB application, or LM2590HVS-ADJ/NOPB equivalent, key selection considerations include its ±4% output voltage tolerance over line/load/temperature, 90 µA standby current in shutdown mode, programmable flag delay via external capacitor, and compatibility with TO-263-7 surface-mount layout for thermal performance.
Technical Context
The LM2590HVS-ADJ/NOPB integrates a fixed-frequency 150-kHz oscillator, internal compensation, thermal shutdown, and two-stage current limiting. Its feedback pin regulates output by comparing a resistive-divider voltage against a precise 1.23 V reference (±1.5% over temperature), enabling accurate adjustable output configuration.
It implements undervoltage lockout via the SD/SS pin (threshold ≈1.3 V), supports soft-start via controlled capacitor charging (5 µA below 1.3 V, 1.6 µA above), and provides an open-collector flag output with 1.25 V delay threshold and 3 mA sink capability - all without requiring external timing components.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | 1 A DC continuous load current - ensures sufficient headroom for industrial 5 V/12 V rail generation with margin. |
| Input Voltage Range | 4.5 V to 60 V - supports wide-input applications including 24 V and 48 V industrial buses and automotive cold-crank conditions. |
| Output Voltage Range | 1.2 V to 57 V (adjustable) - configured via external resistor divider; enables single BOM for multiple output rails. |
| Feedback Reference | 1.23 V ±1.5% (–40°C to +125°C) - defines output accuracy baseline; determines VOUT = 1.23 × (1 + R1/R2). |
| Switching Frequency | 150 kHz ±15% - enables use of compact, low-cost 33 µH–100 µH inductors and reduces EMI compared to lower-frequency alternatives. |
| Standby Current | 90 µA typical at VIN = 60 V - minimizes system quiescent loss during sleep or standby modes. |
| Output Voltage Tolerance | ±4% over full line, load, and temperature - guarantees regulation compliance without post-conversion trimming. |
Pinout & Package
LM2590HVS-ADJ/NOPB uses the KTW (TO-263-7) thermally enhanced surface-mount package (10.10 mm × 8.89 mm), with exposed tab soldered to PCB copper for low thermal resistance (RθJA = 20°C/W with 3 in² double-sided copper).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 VIN | Positive input supply | Accepts up to 60 V DC; requires ≥330 µF low-ESR input capacitor to handle pulsed switch current and suppress transients. |
| 2 Output | Internal power switch drain | Drives external catch diode and inductor; swings between ~VIN–0.95 V (ON) and ~–0.5 V (OFF); peak current limited to 2.8 A. |
| 3 Flag | Open-collector error indicator | Active-low (≤1 V) when output drops below 95% nominal; sinks ≤3 mA; requires external pull-up (e.g., 4.7 kΩ to VOUT). |
| 4 GND | Power and signal ground | Common return for internal circuitry, feedback, and soft-start; must be low-inductance connection to minimize noise coupling. |
| 5 Delay | Flag delay timing node | Charged by 3 µA internal current source; flag goes high after capacitor voltage exceeds 1.25 V - sets power-good assertion delay. |
| 6 Feedback | Regulation sense input | Compares divider voltage to 1.23 V reference; bias current ≤50 nA - enables high-resistor-divider designs with minimal error. |
| 7 SD/SS | Shutdown/Soft-start control | Drives low (≤0.6 V) for shutdown (90 µA IQ); floats or pulled high (≥2 V) for operation; capacitor here controls output ramp rate. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated soft-start | Controlled 5 µA/1.6 µA current source on SD/SS pin enables predictable, capacitor-programmable output voltage ramp - prevents inrush into large output capacitors. |
| Out-of-regulation flag with delay | Open-collector FLAG pin asserts low within microseconds of output dropout; DELAY pin allows user-defined hold-off before flag deassertion - avoids false triggers during transient loads. |
| High-voltage input capability | Rated for 60 V DC input with 63 V absolute max - supports direct connection to unregulated 48 V telecom or 24 V industrial supplies without front-end buck pre-regulation. |
| Thermal and current protection | Two-stage current limit (peak 2.8 A) plus thermal shutdown at 150°C - ensures robust fault recovery without external circuitry in overload or short-circuit events. |
| Low-quiescent standby mode | 90 µA typical shutdown current at 60 V input - critical for battery-backed or energy-harvesting systems where micropower operation extends runtime. |
Applications
| Industrial Power Supply | Automotive Body Control Module |
|---|---|
|
Use Scenario: Generating stable 5 V or 12 V from a noisy 24 V vehicle battery subject to load dump and cold-crank conditions. IC Role / Device Role / Timing Role: Primary step-down regulator providing isolated, regulated DC power to microcontrollers, CAN transceivers, and sensors. Use Value: 60 V input rating and thermal shutdown withstand 35 V load dump spikes; ±4% output tolerance ensures reliable MCU operation across temperature. |
Use Scenario: On-card 3.3 V or 5 V supply for infotainment head unit logic, powered from a 12 V automotive rail. IC Role / Device Role / Timing Role: Compact, high-efficiency buck converter replacing linear regulators to reduce heat and improve efficiency. Use Value: TO-263-7 package with exposed tab enables >1 A continuous output with minimal heatsinking; 150 kHz switching allows small 33 µH inductors. |
| Programmable Lab Power Supply | Industrial IoT Sensor Node |
|
Use Scenario: Adjustable output stage in a benchtop power supply delivering 1.2–30 V at 1 A for prototype testing. IC Role / Device Role / Timing Role: Core voltage-setting element using feedback divider; soft-start prevents overshoot during voltage programming. Use Value: 1.23 V reference with ±1.5% drift enables <1% output error across –40°C to +125°C; SD/SS pin allows remote enable/disable. |
Use Scenario: Powering ultra-low-power wireless sensor nodes from long-life LiSOCl₂ batteries or energy harvesters. IC Role / Device Role / Timing Role: Efficient step-down converter extending battery life while supporting intermittent high-current RF transmission bursts. Use Value: 90 µA shutdown current preserves battery capacity during sleep; flag output signals power-good status to host MCU for safe boot sequencing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM2590HV-5.0/NOPB | Fixed 5 V output; no feedback divider required; same pinout and thermal specs. | Lacks output adjustability; eliminates two external resistors but sacrifices flexibility. | Select when 5 V output is fixed and board space is constrained - reduces BOM count and design validation effort. |
| LM2596HV-ADJ/NOPB | Higher 150 kHz frequency (same), but rated for 63 V max input and includes improved ESD rating (±2 kV HBM). | Slightly higher cost; identical functional behavior and PCB footprint compatibility with LM2590HVS-ADJ/NOPB. | Prefer for new designs requiring extended input margin or enhanced manufacturing ESD robustness; drop-in replacement with no layout change. |
Compared with LM2590HV-5.0/NOPB, LM2590HVS-ADJ/NOPB trades fixed-output simplicity for full voltage programmability; compared with LM2596HV-ADJ/NOPB, it offers identical functionality at lower cost but with slightly reduced input voltage margin and ESD rating.
Availability
LM2590HVS-ADJ/NOPB is available at Aetrix Electronics and suitable for industrial power supplies, automotive body electronics, and programmable lab equipment requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for LM2590HVS-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 headquartered in Dallas, Texas, designing and manufacturing analog ICs, embedded processors, and high-reliability power management solutions.
The LM2590HV series was developed as part of TI's SIMPLE SWITCHER® portfolio to deliver easy-to-use, high-voltage buck regulators with minimal external components for industrial, automotive, and telecom power systems.
FAQ
What is the maximum input voltage rating for LM2590HVS-ADJ/NOPB?
The LM2590HVS-ADJ/NOPB has an absolute maximum input voltage rating of 63 V, with recommended operating range up to 60 V DC. This enables direct use with 48 V industrial buses and withstands automotive load-dump transients. Operation beyond 60 V requires careful thermal design and derating per the datasheet's thermal metrics.
How does the feedback pin (Pin 6) function in LM2590HVS-ADJ/NOPB?
In LM2590HVS-ADJ/NOPB, Pin 6 (Feedback) senses the output voltage via an external resistor divider and compares it to an internal 1.23 V reference. The device adjusts duty cycle to maintain VFB = 1.23 V, so VOUT = 1.23 × (1 + R1/R2). Bias current is ≤50 nA, minimizing divider error and enabling high-value resistors for low quiescent loss.
Can LM2590HVS-ADJ/NOPB be used in shutdown mode with zero load?
Yes - LM2590HVS-ADJ/NOPB draws only 90 µA typical quiescent current in shutdown mode (SD/SS ≤ 0.6 V), even with VIN = 60 V and no output load. This makes it suitable for battery-powered systems requiring deep sleep states. The flag output remains inactive, and internal circuits are fully disabled except for the shutdown comparator and bias generator.
What package type does LM2590HVS-ADJ/NOPB use, and how is thermal performance achieved?
LM2590HVS-ADJ/NOPB uses the KTW (TO-263-7) surface-mount package with an exposed thermal pad. Thermal performance relies on soldering the tab to ≥2.5 in² of 1 oz. copper on one side (RθJA = 30°C/W) or ≥3 in² double-sided copper with 16 in² on the opposite side (RθJA = 20°C/W). No external heatsink is required for 1 A continuous operation under these conditions.
Is LM2590HVS-ADJ/NOPB pin-compatible with other members of the LM2590HV family?
Yes - LM2590HVS-ADJ/NOPB shares identical 7-pin TO-263 (KTW) pinout and electrical behavior with LM2590HV-3.3/NOPB, LM2590HV-5.0/NOPB, and LM2590HV-12/NOPB. Only the feedback network differs; all share the same VIN, Output, Flag, GND, Delay, Feedback, and SD/SS pin assignments and functions.
LM2590HVS-ADJ/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- SIMPLE SWITCHER®
- Package/Case:
- TO-263-8, D2PAK (7 Leads + Tab), TO-263CA
- 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:
- 1A
- Frequency - Switching:
- 150kHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TO-263 (DDPAK-7)
LM2590HVS-ADJ/NOPB FAQ
1.How can I place an order for LM2590HVS-ADJ/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM2590HVS-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 LM2590HVS-ADJ/NOPB reliable?
The price and inventory of LM2590HVS-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 LM2590HVS-ADJ/NOPB is usually 5 days.
3.What payment methods are accepted for LM2590HVS-ADJ/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM2590HVS-ADJ/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM2590HVS-ADJ/NOPB?
LM2590HVS-ADJ/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM2590HVS-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 LM2590HVS-ADJ/NOPB?
For technical support, including LM2590HVS-ADJ/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM2590HVS-ADJ/NOPB requirements.
6.How does Aetrix verify that LM2590HVS-ADJ/NOPB is sourced from the original manufacturer or authorized distributors?
All LM2590HVS-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 LM2590HVS-ADJ/NOPB meets industry standards.
7.What is the process for return or replacement of LM2590HVS-ADJ/NOPB?
All LM2590HVS-ADJ/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM2590HVS-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 LM2590HVS-ADJ/NOPB part is unused and in its original packaging.
Return procedure for LM2590HVS-ADJ/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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