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Texas Instruments LM2593HVS-ADJ/NOPB
- Part No.:
- LM2593HVS-ADJ/NOPB
- Manufacturer:
- Texas Instruments
- Package:
- TO-263-8, D2PAK (7 Leads + Tab), TO-263CA
- Datasheet:
-
LM2593HVS-ADJ/NOPB.pdf
- Description:
- IC REG BUCK ADJ 2A TO263
- Quantity:
- Payment:
- Shipping:
Inventory:959
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Product details
Overview
LM2593HVS-ADJ/NOPB from Texas Instruments is a monolithic non-synchronous step-down DC-DC converter IC designed for high-input-voltage industrial and automotive power supplies. It delivers up to 2 A output current with ±4% output voltage accuracy across 1.2 V to 57 V (adjustable), supports 4.5–60 V input, operates at 150 kHz fixed frequency, and integrates shutdown/soft-start, out-of-regulation error flag, and thermal/current protection.
For engineers reviewing the LM2593HVS-ADJ/NOPB datasheet, LM2593HVS-ADJ/NOPB pinout, LM2593HVS-ADJ/NOPB application, or LM2593HVS-ADJ/NOPB equivalent, key selection criteria include its 60-V max input rating, 7-pin TO-263 package with exposed thermal pad, adjustable feedback reference of 1.23 V, 90 µA standby current, and integrated error flag with programmable delay - all critical for rugged off-line and battery-fed buck regulator designs.
Technical Context
The LM2593HVS-ADJ/NOPB implements a current-mode control architecture with internal 150-kHz oscillator, fixed-frequency PWM operation, and a single N-channel MOSFET switch. Its feedback loop uses a precision 1.23-V reference and accepts external resistor divider for output setting, enabling wide-range adjustment without external op-amps.
Functional supervision includes an open-collector error flag (Pin 3) activated when output drops below 95% of nominal, with delay timing controlled by an internal 3-µA current source charging an external capacitor on Pin 5. Shutdown/soft-start (Pin 7) provides dual-mode control: hard shutdown at ≤0.6 V (90 µA IQ) or programmable soft-start via capacitor ramping.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5 V to 60 V - supports wide-range industrial rails, 48-V telecom, and automotive cold-crank conditions. |
| Output Current | 2 A continuous - sufficient for powering FPGAs, microcontrollers, and analog subsystems without external boost stages. |
| Feedback Reference | 1.23 V ±2.7% - enables precise output programming from 1.2 V to 57 V using standard 1% resistors. |
| Switching Frequency | 150 kHz (±15%) - allows use of compact, low-cost 10–47 µH inductors and reduces EMI compared to lower-frequency alternatives. |
| Standby Quiescent Current | 90 µA typical at 60 V VIN - minimizes battery drain in always-on systems such as telematics or sensor nodes. |
| Oscillator Accuracy | ±15% over –40°C to +125°C - ensures predictable filter sizing and stable loop behavior across full temperature range. |
| Thermal Protection | Internal thermal shutdown - prevents damage during overload or poor heatsinking; auto-recovery on cooldown. |
Pinout & Package
LM2593HVS-ADJ/NOPB is supplied in a 7-pin TO-263 (KTW) surface-mount package with exposed thermal pad (10.10 mm × 8.89 mm), optimized for high-power dissipation in space-constrained PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - VIN | Power Input | Accepts 4.5–60 V DC; requires local low-ESR bypass capacitor to handle high di/dt switching currents. |
| 2 - Output | Switch Node | Drives external Schottky diode and inductor; swings between ~VIN–1.3 V and –0.5 V during operation. |
| 3 - Flag | Error Signal Output | Open-collector flag active low ≤1 V when output <95% of setpoint; sinks up to 3 mA; requires external pull-up. |
| 4 - Ground | Power & Signal Reference | Common return for input/output paths and internal circuitry; must be connected to low-impedance PCB ground plane. |
| 5 - Delay | Flag Timing Control | Charged by internal 3-µA source; sets power-good assertion delay; clamped at 1.7 V to prevent overvoltage. |
| 6 - Feedback | Voltage Sense Input | Compares divided output against 1.23-V internal reference; bias current ≤100 nA enables high-resistor-divider designs. |
| 7 - SD/SS | Control Input | Shuts down device at ≤0.6 V (90 µA IQ); initiates soft-start when pulled above 2 V; internal 7-V clamp protects pin. |
Key Features
| Feature | Design Value |
|---|---|
| Wide Input Range (4.5–60 V) | Enables direct connection to unregulated 24-V/48-V industrial buses or automotive batteries without pre-regulation. |
| Integrated Error Flag with Programmable Delay | Provides system-level power-good signaling with user-defined hold-off time, eliminating need for external supervisor ICs. |
| Shutdown/Soft-Start Pin (SD/SS) | Combines low-power disable (90 µA) and controlled output ramp-up in one pin, simplifying sequencing in multi-rail systems. |
| Thermal & Current Limit Protection | Dual-stage current limit and thermal shutdown ensure robust operation under short-circuit or overheating conditions without external sensing. |
| Fixed 150-kHz Switching Frequency | Guarantees consistent EMI profile and predictable inductor/transformer sizing across production lots and temperatures. |
Applications
| Industrial Power Supply | Automotive Body Control Module |
|---|---|
Use Scenario: Converting 48-V rail to 3.3 V/5 V for PLC I/O modules and fieldbus interfaces operating in harsh factory environments. IC Role / Device Role / Timing Role: Primary step-down regulator delivering regulated 2-A output with ±4% accuracy and thermal fault recovery. Use Value: Eliminates need for external pre-regulator stages due to 60-V absolute max input rating and built-in overvoltage protection. | Use Scenario: Powering microcontroller, CAN transceiver, and sensor interface in vehicle door modules subjected to load-dump transients. IC Role / Device Role / Timing Role: High-input-voltage buck controller providing stable 5-V supply with error flag monitoring for system diagnostics. Use Value: Withstands 60-V load-dump events per ISO 7637-2 while maintaining regulation, reducing need for upstream TVS clamping. |
| Telecom Remote Radio Unit | Test Equipment Power Subsystem |
Use Scenario: Generating isolated 12-V and –5-V rails from 48-V backplane in outdoor small-cell base stations. IC Role / Device Role / Timing Role: Adjustable-output buck regulator configured for 12-V output, paired with charge-pump circuit for negative bias generation. Use Value: Integrated charge-pump capability (per Figure 28) enables low-current negative voltage without extra inductor or IC. | Use Scenario: Providing programmable 1.8–24-V outputs in benchtop power analyzers requiring fast transient response and low-noise operation. IC Role / Device Role / Timing Role: Precision adjustable regulator with soft-start and error flag used in digitally controlled output stage. Use Value: 1.23-V reference tolerance and feedforward capacitor support enable <1% output ripple even at 2-A loads. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM2596HV-ADJ/NOPB | Same 60-V input, but 3-A output rating and 150-kHz frequency; lacks error flag and delay pin. | No integrated power-good signaling; requires external comparator for fault detection. | Choose when higher output current is required and flag functionality is handled externally. |
| TPS54202DDCR | 42-V max input, 2-A output, 500-kHz switching, integrated high-side FET; no error flag or soft-start pin. | Higher frequency enables smaller magnetics but reduced input voltage range and no dedicated flag/delay functions. | Prefer for space-constrained designs where 42-V input suffices and external fault monitoring is acceptable. |
Compared with LM2596HV-ADJ/NOPB and TPS54202DDCR, the LM2593HVS-ADJ/NOPB uniquely combines 60-V input capability, integrated error flag with programmable delay, and soft-start/shutdown on a single pin - making it optimal for safety-monitored industrial and automotive buck regulators where reliability signaling is mandatory.
Availability
LM2593HVS-ADJ/NOPB is available at Aetrix Electronics and suitable for industrial power supplies, automotive body electronics, and telecom remote radio units requiring stable component supply and long-term manufacturability.
Supply support for LM2593HVS-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 leader specializing in analog, embedded processing, and power management technologies, with decades of expertise in high-reliability power conversion solutions.
The LM2593HV family was engineered for rugged, high-input-voltage DC-DC conversion in industrial automation, transportation, and infrastructure equipment - emphasizing simplicity, fault resilience, and minimal external component count.
FAQ
What is the maximum input voltage rating for LM2593HVS-ADJ/NOPB?
The LM2593HVS-ADJ/NOPB has an absolute maximum input voltage rating of 63 V, with recommended operation up to 60 V. This enables direct use with 48-V industrial buses and automotive systems experiencing load-dump transients. Exceeding 60 V risks violating recommended operating conditions, though the device withstands brief 63-V peaks per absolute maximum ratings.
How does the feedback pin (Pin 6) function in LM2593HVS-ADJ/NOPB?
The feedback pin (Pin 6) of LM2593HVS-ADJ/NOPB senses the output voltage via an external resistor divider and compares it to an internal 1.23-V reference. Its bias current is ≤100 nA, allowing high-value resistors (e.g., 1 kΩ and 7.15 kΩ for 10-V output) without significant error. The pin must not exceed 25 V, and a Schottky clamp is recommended if input >40 V and a feedforward capacitor is used.
Can LM2593HVS-ADJ/NOPB generate a negative output voltage?
Yes - LM2593HVS-ADJ/NOPB can generate a low-current negative output using an external charge-pump circuit (as shown in Figure 28 of the datasheet). This requires ≥1.2 A load on the positive output and a series resistor to limit C1 charging current. The negative rail is unregulated and limited to ~600 mA, making it suitable for biasing op-amps or level shifters, not main system rails.
What thermal performance can be expected from LM2593HVS-ADJ/NOPB in TO-263 package?
In the KTW (TO-263) package, LM2593HVS-ADJ/NOPB achieves 20°C/W junction-to-ambient thermal resistance when mounted on a double-sided PCB with 3 in² copper on the component side and ~16 in² on the opposite side. With proper thermal pad soldering and 2.5 in² copper on a single layer, RθJA is 30°C/W - enabling 2-A operation up to +125°C ambient with appropriate board layout.
Does LM2593HVS-ADJ/NOPB support synchronous rectification?
No - LM2593HVS-ADJ/NOPB is a non-synchronous buck regulator that drives an external Schottky diode (e.g., 21DQ06) on the output switch node (Pin 2). It does not integrate or support synchronous MOSFET drive. For synchronous operation, designers must select alternatives like the TPS54302 or LM5115, which provide gate-drive outputs for high-side and low-side FETs.
LM2593HVS-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:
- 2A
- 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)
LM2593HVS-ADJ/NOPB FAQ
1.How can I place an order for LM2593HVS-ADJ/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM2593HVS-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 LM2593HVS-ADJ/NOPB reliable?
The price and inventory of LM2593HVS-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 LM2593HVS-ADJ/NOPB is usually 5 days.
3.What payment methods are accepted for LM2593HVS-ADJ/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM2593HVS-ADJ/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM2593HVS-ADJ/NOPB?
LM2593HVS-ADJ/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM2593HVS-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 LM2593HVS-ADJ/NOPB?
For technical support, including LM2593HVS-ADJ/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM2593HVS-ADJ/NOPB requirements.
6.How does Aetrix verify that LM2593HVS-ADJ/NOPB is sourced from the original manufacturer or authorized distributors?
All LM2593HVS-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 LM2593HVS-ADJ/NOPB meets industry standards.
7.What is the process for return or replacement of LM2593HVS-ADJ/NOPB?
All LM2593HVS-ADJ/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM2593HVS-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 LM2593HVS-ADJ/NOPB part is unused and in its original packaging.
Return procedure for LM2593HVS-ADJ/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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