LM5121MH/NOPB Texas Instruments Integrated Circuit (Small Outline Packages) In Stock
Texas Instruments LM5121MH/NOPB is a wide-input synchronous boost controller with 3V to 65V input range, up to 100V output, current-mode PWM control, and disconnection switch support in a compact SOIC-20 package.
- Manufacturer
- Texas Instruments
- Package
- Small Outline Packages
- Pin Count
- 21
- Lifecycle
- ACTIVE
- Datasheet
- LM5121MH/NOPB Datasheet PDF
- Category
- Integrated Circuit
- Price
- From $3.4986(MOQ 50)
- Temp Range
- -40.0°C to 125.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
What are the key features of LM5121MH/NOPB?
- Wide 3V to 65V input range with output voltage programmable up to 100V covers industrial, automotive, and telecom bus rails in a single controller
- Current-mode PWM control with integrated disconnection switch function enables precise output regulation and safe output disconnect in fault conditions
- Synchronous boost topology with external N-FET drive reduces switching losses and improves efficiency at high output voltages compared to diode-rectified designs
- 20-pin SOIC package with 3V to 65V operating range supports flexible PCB integration in wide input-range industrial power supply designs
What is LM5121MH/NOPB used for?
The LM5121MH/NOPB is designed for industrial and telecom power supply designs that boost from a wide input bus (3V to 65V) to regulated outputs of up to 100V, including LED drivers for large signage, 48V bus hold-up circuits, and high-voltage power-factor-correction front-ends. Its disconnection switch control feature makes it well suited for battery-backup systems and OR-ing circuits where the output must be cleanly isolated during input fault conditions.
What are the specifications of LM5121MH/NOPB?
| Pbfree Code | Yes |
| YTEOL | 15 |
| Additional Feature | SEATED HGT-NOM, OUTPUT VOLTAGE UP TO 100 V |
| Analog IC - Other Type | SWITCHING CONTROLLER |
| Control Mode | CURRENT-MODE |
| Control Technique | PULSE WIDTH MODULATION |
| Input Voltage-Max | 65V |
| Input Voltage-Min | 3V |
| Input Voltage-Nom | 12V |
| JESD-30 Code | R-PDSO-G20 |
| JESD-609 Code | e3 |
| Number of Functions | 1 |
| Number of Outputs | 1 |
| Output Current-Max | 20A |
| Output Voltage-Max | 100V |
| Output Voltage-Min | 3V |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | TSSOP20,.25 |
| Package Shape | RECTANGULAR |
| Package Style | SMALL OUTLINE, HEAT SINK/SLUG, THIN PROFILE, SHRINK PITCH |
| Peak Reflow Temperature (Cel) | 260 |
| Qualification Status | Not Qualified |
| Screening Level | AEC-Q100 |
| Surface Mount | YES |
| Switcher Configuration | BUCK-BOOST |
| Switching Frequency-Max | 1000kHz |
| Technology | BICMOS |
| Temperature Grade | AUTOMOTIVE |
| Terminal Finish | Matte Tin (Sn) |
| Terminal Form | GULL WING |
| Terminal Pitch | 0.65mm |
| Terminal Position | DUAL |
| Time@Peak Reflow Temperature-Max (s) | 30 |
| Package | Small Outline Packages |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| Moisture Sensitivity Level | MSL 1 |
| ECCN | EAR99 |
| HTS Code | 8542.39.00.90 |
Where can I find the LM5121MH/NOPB datasheet?
LM5121MH/NOPB Datasheet DownloadOfficial datasheet from Texas Instruments
What are equivalent replacements for LM5121MH/NOPB?
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
What input and output voltage range does the LM5121MH/NOPB support for boost converter designs?
The LM5121MH/NOPB accepts input voltages from 3V to 65V and can regulate an output up to 100V, making it suitable for boosting 12V, 24V, or 48V industrial bus rails to the higher voltages needed by LED lighting arrays, capacitor charging circuits, or high-voltage analog rails.
How does the disconnection switch control feature of the LM5121MH/NOPB benefit system-level protection?
The integrated disconnection switch control allows an external FET to isolate the output from the input during fault conditions or system shutdown, preventing back-feed currents and enabling clean hot-swap or OR-ing operation in redundant 48V power systems with multiple parallel converters supplying a shared output bus.
Which control architecture does the LM5121MH/NOPB use, and how does it improve transient response?
The controller uses current-mode pulse-width modulation, which senses the inductor current on every switching cycle to provide inherent cycle-by-cycle current limiting and faster load-transient response compared to voltage-mode control, especially important for output loads that switch abruptly in industrial automation equipment.
In which industries and product categories is the LM5121MH/NOPB most commonly deployed?
It is widely used in industrial motor-drive auxiliary supplies, telecom 48V-to-100V boost stages, LED street-lighting drivers, avionics power conditioning modules, and battery-backup hold-up circuits where an input range of 3V to 65V and an output capability of up to 100V are both required from a single controller IC.
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Why Buy from FindMyChip
About Texas Instruments
Texas Instruments (TI) is a global semiconductor company headquartered in Dallas, Texas. TI designs and manufactures analog and embedded processing chips used in industrial, automotive, consumer, communications, and enterprise systems.
More from Texas Instruments
| Qty. | Unit Price | Ext. Price |
|---|---|---|
| 50+ | $4.0368 | $201.84 |
| 65+ | $3.9023 | $253.65 |
| 86+ | $3.4986 | $300.88 |
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