My Inquiry
My Account
Texas Instruments LM2588SX-5.0/NOPB
- Part No.:
- LM2588SX-5.0/NOPB
- Manufacturer:
- Texas Instruments
- Package:
- TO-263-8, D2PAK (7 Leads + Tab), TO-263CA
- Datasheet:
-
LM2588SX-5.0/NOPB.pdf
- Description:
- IC REG BOOST FLYBACK 5V 5A TO263
- Quantity:
- Payment:
- Shipping:
Inventory:472
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LM2588SX-5.0/NOPB from Texas Instruments is a monolithic 5-A flyback/boost/forward switching regulator IC with fixed 5-V output, NPN internal switch rated for 65-V standoff and 5-A peak current, wide 4–40-V input range, and adjustable 100–200-kHz switching frequency - used in isolated DC-DC power supplies for industrial control and telecom infrastructure.
For engineers reviewing the LM2588SX-5.0/NOPB datasheet, LM2588SX-5.0/NOPB pinout, LM2588SX-5.0/NOPB application, or LM2588SX-5.0/NOPB equivalent, key selection criteria include its integrated 5-A NPN switch, ±4% system output voltage tolerance over line/load, external shutdown capability, current-mode control architecture, and TO-263-7 (KTW) thermally enhanced package.
Technical Context
The LM2588SX-5.0/NOPB implements current-mode control using an internal error amplifier with 1.23-V reference, transconductance of 0.75 mmho (typ), and voltage gain of 165 V/V (typ), comparing feedback-derived ramp against sensed switch current to regulate duty cycle. Its oscillator supports both resistor-programmed (100–200 kHz) and external synchronization via pin 6.
Protection includes undervoltage lockout (3.3 V threshold), thermal shutdown, cycle-by-cycle current limiting (6.5 A typ), and soft-start (11 μA sink current). The device operates across −40°C to +125°C junction temperature and delivers up to 90% efficiency in optimized flyback configurations.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 5.0 V ±4% over full line/load/temperature range - ensures stable rail for downstream logic or analog circuitry without external feedback resistors. |
| Input Voltage Range | 4 V to 40 V - supports wide-range industrial inputs including 12-V and 24-V nominal bus systems with brownout margin. |
| Switch Current Limit | 6.5 A (typ), 5.0 A (min) - defines maximum peak primary-side current in flyback mode, enabling robust transformer design with safety margin. |
| Switching Frequency | 100–200 kHz (adjustable via external resistor or sync pin) - allows trade-off between magnetic size, EMI profile, and efficiency in layout-constrained applications. |
| Shutdown Supply Current | 16 μA (typ) at VSH = 3 V - enables ultra-low-power standby states in battery-backed or energy-sensitive systems. |
| Thermal Resistance θJA | 35 °C/W (KTW package, 0.4896 in² copper) - determines required PCB copper area for thermal management at full 5-A load without heatsink. |
| Output Tolerance | ±4% system-level tolerance - guaranteed across input (4–40 V), load (500 mA–1.45 A), and temperature (−40°C to +125°C) - simplifies output capacitor selection and system margining. |
Pinout & Package
LM2588SX-5.0/NOPB uses the 7-pin DDPAK/TO-263 (KTW) package - thermally optimized for high-current switching regulators, with exposed die pad soldered to PCB copper for low-impedance heat path and mechanical stability.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Freq Adj / ON/OFF) | Multi-function digital control input | Accepts resistor-to-ground for frequency setting (100–200 kHz) or ≥3 V for shutdown; requires isolation diode in shutdown configuration. |
| 2 (Ground) | Power and signal reference | Common return for internal circuits, switch emitter, and compensation network - must be low-inductance connection to minimize noise coupling. |
| 3 (Feedback) | Output voltage sensing node | Internally referenced to 5.0 V; tied directly to output in fixed-version devices - no external divider needed for 5-V operation. |
| 4 (Compensation) | Error amplifier output | Drives external RC network to stabilize loop response; transconductance 0.75 mmho enables precise pole/zero placement. |
| 5 (VIN) | Main power supply input | Accepts 4–40 V unregulated input; bypass capacitor required near pin to suppress high-frequency ripple from switch node. |
| 6 (Sync) | External clock synchronization input | Accepts negative-going pulses to align switching edge with system clock - eliminates beat frequencies in multi-rail power systems. |
| 7 (Switch) | NPN collector output | Drives primary winding of flyback transformer or boost inductor; rated for 65-V standoff and 5-A peak current - requires snubber and proper routing. |
Key Features
| Feature | Design Value |
|---|---|
| Current-mode control | Enables fast transient response (<50 μs recovery), inherent cycle-by-cycle current limiting, and simplified loop compensation vs voltage-mode topologies. |
| Integrated 5-A NPN switch | Eliminates need for external high-current transistor and driver, reducing BOM count and layout complexity in flyback/boost designs. |
| Adjustable switching frequency | Permits optimization of magnetics size, EMI filtering requirements, and efficiency across varying load profiles and thermal constraints. |
| Soft-start function | Reduces inrush current during startup by gradually increasing peak switch current - prevents input rail sag and output overshoot. |
| System-level ±4% output tolerance | Guarantees regulated 5-V rail accuracy without post-regulation LDOs in cost-sensitive industrial and telecom applications. |
Applications
| Industrial PLC Power Supply | Telecom Remote Radio Unit |
|---|---|
Use Scenario: Provides isolated 5-V bias rail from 24-V DC field bus in programmable logic controller backplane modules. IC Role / Device Role / Timing Role: Flyback regulator IC generating galvanically isolated 5-V output with built-in current limiting and UVLO protection. Use Value: Enables compact, self-protected 5-V supply with only transformer, diode, and capacitors - meets IEC 61000-4 immunity requirements without additional supervision ICs. | Use Scenario: Powers FPGA and RF front-end ICs in outdoor 4G/5G remote radio heads operating from −40°C to +85°C ambient. IC Role / Device Role / Timing Role: Boost converter IC stepping up 12-V battery input to stable 5-V rail under dynamic load transients. Use Value: Delivers >80% efficiency at 750 mA load with current-mode regulation - maintains voltage within ±2% during 1-A step loads typical of burst-mode RF transmission. |
| Medical Diagnostic Imaging Module | Automotive ADAS Camera ECU |
Use Scenario: Generates isolated 5-V auxiliary supply for CCD sensor bias and ADC reference in portable ultrasound units. IC Role / Device Role / Timing Role: Forward converter IC delivering low-noise 5-V output with synchronized switching to avoid interference with sensitive analog acquisition paths. Use Value: Frequency synchronization (via pin 6) eliminates heterodyne noise in image data - achieves <100 μVpp output ripple with standard LC filter. | Use Scenario: Supplies 5-V rail to image signal processor and serializer in automotive surround-view camera modules. IC Role / Device Role / Timing Role: Flyback regulator IC operating from 9–16-V automotive battery with integrated thermal shutdown and UVLO. Use Value: Withstands cold-crank (4.5 V) and load-dump (40 V) events per ISO 7637-2 - maintains regulation without latch-up or reset during engine start-stop cycles. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar flyback/boost regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM2587SX-5.0/NOPB | Same pinout, identical 5-V fixed output, but lacks sync pin and frequency adjustment - oscillator fixed at 100 kHz. | Suitable for cost-optimized designs where EMI filtering is less critical and multi-device synchronization is unnecessary. | Select when board space and BOM count are prioritized over frequency flexibility and noise coordination. |
| UC3845N | Current-mode PWM controller (not integrated switch); requires external MOSFET, gate driver, and protection circuitry. | Offers higher voltage/current scalability and custom topology support (e.g., active clamp forward), but increases design effort and component count. | Select when >5-A output or >65-V input is required, or when topology-specific control features (e.g., slope compensation) are needed. |
Compared with LM2587SX-5.0/NOPB, the LM2588SX-5.0/NOPB adds frequency synchronization and adjustable switching - critical for noise-sensitive multi-rail systems; compared with UC3845N, it integrates the power switch and reduces external components by ~7 parts, accelerating time-to-prototype for 5-V flyback designs.
Availability
LM2588SX-5.0/NOPB is available at Aetrix Electronics and suitable for industrial automation, telecom infrastructure, and medical imaging applications requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for LM2588SX-5.0/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 ICs.
The LM2588 product line was designed for cost-effective, low-component-count isolated and non-isolated DC-DC conversion in industrial, telecom, and medical equipment - emphasizing integration, thermal robustness, and system-level performance guarantees.
FAQ
What is the maximum input voltage rating for the LM2588SX-5.0/NOPB?
The LM2588SX-5.0/NOPB has an absolute maximum input voltage rating of 45 V, with recommended operating range from 4 V to 40 V. Exceeding 40 V may trigger undervoltage lockout release but risks overstress; operation above 45 V can cause permanent damage to the internal NPN switch and control circuitry. Always use input clamping or pre-regulation for automotive or industrial environments with load-dump transients.
Does the LM2588SX-5.0/NOPB require external feedback resistors for 5-V operation?
No, the LM2588SX-5.0/NOPB is a fixed-output variant - its internal feedback network is factory-trimmed to deliver 5.0 V ±4% without external resistors. Pin 3 (Feedback) connects directly to the output in standard application circuits. External resistors are only required for the adjustable version (LM2588SX-ADJ/NOPB) to set VOUT = 1.23 V × (1 + R1/R2).
How does the shutdown function work on the LM2588SX-5.0/NOPB?
The LM2588SX-5.0/NOPB uses pin 1 (Freq Adj / ON/OFF) for shutdown: applying ≥3 V to this pin forces the device into low-power state, reducing total supply current to 16 μA (typ). An isolation diode is mandatory to prevent interference with frequency adjustment. To resume operation, remove the voltage source and leave pin 1 floating - the IC automatically restarts after soft-start delay.
Can the LM2588SX-5.0/NOPB be used in a boost configuration?
Yes, the LM2588SX-5.0/NOPB supports boost topology per TI's Figure 17 and Section 7.3.2. It regulates 5-V output from inputs below 5 V (minimum 4 V) using an external inductor, diode, and output capacitor. Peak switch current must be externally limited to ≤5 A in boost mode since internal current limit applies only in flyback configuration per datasheet Note (3) in Section 6.1.
What thermal considerations apply to the LM2588SX-5.0/NOPB in TO-263-7 package?
The LM2588SX-5.0/NOPB in KTW package has θJA = 35 °C/W with 0.4896 in² (3.6× package area) of 1-oz copper. At 5-A load and 12-V input, power dissipation exceeds 2 W - requiring ≥4 in² of thermal copper pour and optional thermal vias to inner layers. Junction temperature must stay ≤125°C; derate output current if ambient exceeds 60°C or copper area is reduced below spec.
LM2588SX-5.0/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- SIMPLE SWITCHER®
- Package/Case:
- TO-263-8, D2PAK (7 Leads + Tab), TO-263CA
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Step-Up, Step-Up/Step-Down
- Output Configuration:
- Positive
- Topology:
- Boost, Flyback, Forward Converter
- Output Type:
- Fixed
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 4V
- Voltage - Input (Max):
- 40V
- Voltage - Output (Min/Fixed):
- 5V
- Voltage - Output (Max):
- -
- Current - Output:
- 5A (Switch)
- Frequency - Switching:
- 100kHz ~ 200kHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TO-263 (DDPAK-7)
LM2588SX-5.0/NOPB FAQ
1.How can I place an order for LM2588SX-5.0/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM2588SX-5.0/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 LM2588SX-5.0/NOPB reliable?
The price and inventory of LM2588SX-5.0/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM2588SX-5.0/NOPB is usually 5 days.
3.What payment methods are accepted for LM2588SX-5.0/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM2588SX-5.0/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM2588SX-5.0/NOPB?
LM2588SX-5.0/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM2588SX-5.0/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 LM2588SX-5.0/NOPB?
For technical support, including LM2588SX-5.0/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM2588SX-5.0/NOPB requirements.
6.How does Aetrix verify that LM2588SX-5.0/NOPB is sourced from the original manufacturer or authorized distributors?
All LM2588SX-5.0/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 LM2588SX-5.0/NOPB meets industry standards.
7.What is the process for return or replacement of LM2588SX-5.0/NOPB?
All LM2588SX-5.0/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM2588SX-5.0/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 LM2588SX-5.0/NOPB part is unused and in its original packaging.
Return procedure for LM2588SX-5.0/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM2588SX-5.0/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…
