My Inquiry
My Account
Texas Instruments LM5001MA
- Part No.:
- LM5001MA
- Manufacturer:
- Texas Instruments
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LM5001MA.pdf
- Description:
- IC REG BOOST FLYBACK ADJ 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,329
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LM5001MA from Texas Instruments is a high-voltage current-mode PWM controller IC integrating a 75-V, 1-A peak-rated N-channel MOSFET for Boost, Flyback, SEPIC, and Forward DC-DC converters. It operates from 3.1 V to 75 V input, delivers 1.26 V ±1.5% reference accuracy, supports up to 1.5 MHz switching via RT resistor, and includes cycle-by-cycle current limiting and thermal shutdown at 165°C - used in industrial power supplies and automotive auxiliary converters.
For engineers reviewing the LM5001MA datasheet, LM5001MA pinout, LM5001MA application, or LM5001MA equivalent, key selection criteria include its integrated 75-V MOSFET RDS(on) (490–800 mΩ), adjustable 50 kHz–1.5 MHz oscillator, EN/UVLO dual-threshold control (0.45 V shutdown / 1.26 V enable), COMP-based loop compensation, and SOIC-8 package compatibility with WSON-8 variants.
Technical Context
The LM5001MA implements peak current-mode control with internal slope compensation (450 mV ramp) to prevent sub-harmonic oscillation above 50% duty cycle. Its PWM comparator compares a scaled current-sense signal (1.05 V/A) plus slope ramp against the COMP voltage, while the error amplifier provides 72 dB DC gain and 3 MHz unity-gain bandwidth for stable loop response.
It features a dedicated high-voltage VCC LDO regulator (6.55–7.15 V output) that tracks VIN up to 6.9 V then clamps, enabling operation across 3.1 V–75 V input range. The EN pin integrates two comparators for programmable UVLO (1.26 V enable threshold, 0.45 V shutdown) with 100 mV hysteresis and a 6 µA internal pull-up current source.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3.1 V to 75 V - supports wide-range industrial and automotive battery inputs without external pre-regulation. |
| Switching Frequency | 50 kHz to 1.5 MHz - set by single RT resistor; enables compact magnetics and EMI optimization. |
| Feedback Reference | 1.260 V ±1.5% - high-accuracy internal reference ensures tight output voltage regulation in feedback loops. |
| Current Limit Threshold | 0.8 A to 1.2 A peak - cycle-by-cycle protection prevents MOSFET overcurrent during startup or overload. |
| Thermal Shutdown | 165°C with 20°C hysteresis - protects die integrity during sustained overload or poor heatsinking. |
| Max Duty Cycle | 80% to 90% - configurable limit prevents transformer saturation and improves transient response margin. |
| COMP Sink Current | 2.5 mA at 250 mV - sufficient drive strength for opto-coupler biasing in isolated flyback designs. |
Pinout & Package
LM5001MA is supplied in an SOIC-8 (D) package (4.9 mm × 3.91 mm body size) with exposed pad not present - distinct from WSON-8 variant. Pin functions are validated per TI SNVS484H datasheet Rev H.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (SW) | Power switch drain node | Connects directly to MOSFET drain; carries high dv/dt switching waveform - requires minimized PCB loop area. |
| 2 (VIN) | Main input supply | Accepts 3.1 V–75 V; powers internal circuitry and charges VCC capacitor; must be bypassed with ≥0.47 µF ceramic. |
| 3 (VCC) | Bias regulator output/input | Internally regulated to 6.9 V (max); can accept external 7–12 V supply to reduce dissipation and improve efficiency. |
| 4 (GND) | Analog and power ground | Reference for current sense, FB, COMP, and RT; must tie to low-impedance ground plane near VCC and VIN caps. |
| 5 (RT) | Oscillator timing/sync input | Resistor-to-GND sets frequency; accepts AC-coupled sync pulses >2.6 V peak for external clock synchronization. |
| 6 (FB) | Feedback input | Inverting input of error amp; referenced to 1.26 V internal bandgap; connects to resistive divider from output. |
| 7 (COMP) | Error amplifier output | Open-drain output with 5 kΩ internal pull-up; connects to compensation network and opto-coupler collector in isolated designs. |
| 8 (EN) | Enable / UVLO input | Dual-threshold control: <0.45 V = shutdown (95 µA IQ), >1.26 V = full operation; internal 6 µA pull-up enables default-on behavior. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 75-V N-Channel MOSFET | Reduces BOM count and layout complexity; eliminates need for external high-voltage switch in Boost/Flyback topologies. |
| Adjustable 50 kHz–1.5 MHz oscillator | Enables optimization of efficiency vs. size trade-off; single RT resistor simplifies frequency setting without trimming. |
| Current-mode control with slope compensation | Ensures stable operation at >50% duty cycle; built-in 450 mV ramp prevents sub-harmonic oscillation without external components. |
| Dual-threshold EN pin with hysteresis | Supports programmable UVLO and remote shutdown; 100 mV hysteresis prevents chatter during input brownout conditions. |
| High-bandwidth error amplifier | 72 dB DC gain and 3 MHz unity-gain bandwidth allow robust Type II compensation for fast load transient response. |
| VCC LDO with external bias option | Improves efficiency in high-VIN applications by allowing external 7–12 V bias, reducing internal power loss and thermal stress. |
Applications
| Industrial DC-DC Power Supply | Automotive Auxiliary Converter |
|---|---|
|
Use Scenario: 24 V truck battery powering 48 V telecom equipment via boost converter. IC Role / Device Role / Timing Role: LM5001MA acts as primary PWM controller and integrated switch, regulating output using FB feedback and COMP-based loop compensation. Use Value: Wide 3.1 V–75 V input range accommodates cold-crank (≈6 V) and load-dump (≈60 V) transients without external protection. |
Use Scenario: 12 V vehicle battery stepping up to 24 V for ADAS camera module power rail. IC Role / Device Role / Timing Role: LM5001MA configures as non-isolated boost converter with EN pin tied to MCU GPIO for controlled startup/shutdown. Use Value: Integrated 75-V MOSFET and 165°C thermal shutdown ensure reliability in under-hood temperature environments. |
| Flyback Isolated Power Supply | SEPIC Battery Backup Converter |
|
Use Scenario: Medical device requiring reinforced isolation between patient-connected and mains-powered sections. IC Role / Device Role / Timing Role: LM5001MA operates in flyback mode with opto-coupler feedback; COMP drives opto-LED via external transistor while FB is grounded. Use Value: Open-drain COMP with 5 kΩ pull-up enables direct opto-coupler interface without additional bias circuitry. |
Use Scenario: Industrial PLC maintaining 5 V output during 9–36 V battery backup transitions. IC Role / Device Role / Timing Role: LM5001MA configured as SEPIC to maintain regulation when input drops below output voltage. Use Value: Adjustable 80–90% max duty cycle prevents transformer saturation and supports seamless buck-boost operation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-voltage PWM controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM5002MA | Higher 100-V MOSFET rating, 2-A peak current limit, wider 100 kHz–2 MHz frequency range. | Suitable for higher-power or higher-input-voltage systems (e.g., 48 V telecom rectifiers). | Select LM5002MA when input exceeds 75 V or peak load current exceeds 1.2 A. |
| UCC28C42DR | External MOSFET required; 30-V VDD max; no integrated HV bias regulator; lower 16-V UVLO threshold. | Requires external HV gate driver and bias supply; better suited for cost-sensitive, lower-voltage designs. | Choose UCC28C42DR only if system already includes discrete 100-V+ MOSFET and dedicated bias rail. |
Compared with LM5002MA, LM5001MA offers lower cost and smaller solution size for ≤75 V, ≤1.2 A applications; versus UCC28C42DR, it eliminates external HV switch and bias complexity but trades off design flexibility and maximum voltage headroom.
Availability
LM5001MA is available at Aetrix Electronics and suitable for industrial DC-DC power supplies, automotive auxiliary converters, and isolated flyback designs requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for LM5001MA 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, delivering analog and embedded processing solutions for industrial, automotive, and communications markets.
The LM5001MA belongs to TI's high-voltage DC-DC controller product line, designed specifically for efficient, compact, and robust non-isolated and isolated switching power supplies operating across harsh input voltage ranges.
FAQ
What is the absolute maximum input voltage rating for the LM5001MA?
The LM5001MA has an absolute maximum VIN-to-GND rating of 76 V. Exceeding this voltage - even transiently due to ringing or load dump - risks permanent damage. Designers must use proper input filtering (e.g., TVS diode + LC filter per Figure 14 in SNVS484H) and ensure PCB layout minimizes VIN/GND loop inductance to suppress overshoot.
Can the LM5001MA operate with an external 12 V bias applied to the VCC pin?
Yes, the LM5001MA supports external VCC bias from 7 V to 12 V. When applied, the internal VCC LDO shuts off, reducing power dissipation and improving overall converter efficiency - especially beneficial when VIN significantly exceeds the output voltage. Ensure the external VCC never exceeds VIN to avoid reverse current through the internal body diode.
How is the switching frequency set on the LM5001MA?
The LM5001MA switching frequency is set by a single resistor (RT) connected between the RT pin and GND. Using RRT = 48.7 kΩ yields ~260 kHz; RRT = 15.8 kΩ yields ~780 kHz. The relationship is defined in the datasheet as FSW ≈ 13.1×10⁹ / (RRT + 83 ns). The RT pin also accepts synchronized clock pulses via 100 pF AC coupling.
What is the purpose of the dual-threshold EN pin on the LM5001MA?
The EN pin on the LM5001MA provides three operational states: <0.45 V = shutdown (IQ ≈ 95 µA), 0.45–1.26 V = standby (VCC active, PWM disabled), >1.26 V = full operation. This enables precise UVLO programming and remote control - e.g., MCU GPIO can force shutdown, while a resistor divider sets minimum input turn-on voltage.
Does the LM5001MA require external slope compensation?
No, the LM5001MA includes internal slope compensation (450 mV ramp) specifically designed to stabilize current-mode control at duty cycles above 50%. This eliminates the need for external ramp injection circuitry, simplifying design and improving consistency across production units.
LM5001MA Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Function:
- Step-Up, Step-Up/Step-Down
- Output Configuration:
- Positive, Isolation Capable
- Topology:
- Boost, Flyback, Forward Converter, SEPIC
- Output Type:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 3.1V
- Voltage - Input (Max):
- 75V
- Voltage - Output (Min/Fixed):
- 3.1V
- Voltage - Output (Max):
- 76V (Switch)
- Current - Output:
- 800mA (Switch)
- Frequency - Switching:
- 50kHz ~ 1.5MHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
LM5001MA FAQ
1.How can I place an order for LM5001MA through Aetrix?
Please submit a Request for Quotation (RFQ) for LM5001MA 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 LM5001MA reliable?
The price and inventory of LM5001MA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM5001MA is usually 5 days.
3.What payment methods are accepted for LM5001MA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM5001MA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM5001MA?
LM5001MA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM5001MA 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 LM5001MA?
For technical support, including LM5001MA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM5001MA requirements.
6.How does Aetrix verify that LM5001MA is sourced from the original manufacturer or authorized distributors?
All LM5001MA 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 LM5001MA meets industry standards.
7.What is the process for return or replacement of LM5001MA?
All LM5001MA units undergo pre-shipment inspection (PSI). If there is an issue with LM5001MA, 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 LM5001MA part is unused and in its original packaging.
Return procedure for LM5001MA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM5001MA 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…
