LM21305SQE/NOPBIn StockTexas Instruments
LM21305SQE/NOPB is a TI 5A synchronous buck converter with 3-14V input, adjustable 200kHz-2MHz frequency in WQFN-26. From $2.35 at 51+ qty, in stock worldwide.
- Manufacturer
- Texas Instruments
- Package
- WQFN
- Pin Count
- 26
- Lifecycle
- ACTIVE
- Datasheet
- LM21305SQE/NOPB Datasheet PDF
- Category
- power-management
- Price
- From $2.3522(MOQ 1)
- Temp Range
- -40.0°C to 125.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- 5A continuous output current with integrated MOSFETs
- Wide 3V to 14V input voltage range
- Adjustable 200kHz to 2MHz switching frequency
- Adjustable output from 0.6V to 5.5V
- High efficiency up to 95% at medium loads
Applications
The LM21305SQE/NOPB powers FPGA, DSP, and processor core and I/O rails in computing and telecom systems. Its 5A output and adjustable frequency allow optimization for either high efficiency or compact inductor size in server, networking, and embedded computing platforms.
Specifications
| Pbfree Code | Yes |
| YTEOL | 15 |
| Additional Feature | 5 VOLT REGULATING OUTPUT ALSO AVAILABLE |
| Analog IC - Other Type | SWITCHING REGULATOR |
| Control Mode | CURRENT-MODE |
| Control Technique | PULSE WIDTH MODULATION |
| Input Voltage-Max | 18V |
| Input Voltage-Min | 3V |
| Input Voltage-Nom | 12V |
| JESD-30 Code | S-PQCC-N28 |
| JESD-609 Code | e3 |
| Number of Functions | 1 |
| Number of Outputs | 1 |
| Output Current-Max | 5A |
| Output Voltage-Max | 0.6V |
| Output Voltage-Min | 0.6V |
| Output Voltage-Nom | 2.5V |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | LCC28,.2SQ,20 |
| Package Shape | SQUARE |
| Package Style | CHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE |
| Peak Reflow Temperature (Cel) | 260 |
| Qualification Status | Not Qualified |
| Surface Mount | YES |
| Switcher Configuration | BUCK |
| Switching Frequency-Max | 1500kHz |
| Technology | BICMOS |
| Temperature Grade | INDUSTRIAL |
| Terminal Finish | Matte Tin (Sn) |
| Terminal Form | NO LEAD |
| Terminal Pitch | 0.5mm |
| Terminal Position | QUAD |
| Time@Peak Reflow Temperature-Max (s) | 30 |
| Package | WQFN |
Compliance & Regulatory
| RoHS Status | Compliant |
| ECCN | EAR99 |
| HTS Code | 8542.39.00.90 |
Alternate & Equivalent Parts
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
What is the maximum output current of the LM21305SQE/NOPB?
The LM21305SQE/NOPB delivers up to 5A continuous output current using fully integrated high-side and low-side synchronous MOSFETs. This eliminates the need for external power transistors, reducing component count and board space.
What is the switching frequency range of the LM21305SQE/NOPB?
The switching frequency is adjustable from 200kHz to 2MHz via an external resistor on the RT pin. Higher frequencies enable smaller inductors and capacitors, while lower frequencies improve efficiency, allowing design tradeoff optimization.
What is the input voltage range of the LM21305SQE/NOPB?
The device accepts 3V to 14V input, covering 3.3V, 5V, and 12V power rails commonly found in computing, telecom, and industrial systems. This range supports both direct battery input and regulated bus voltage applications.
What efficiency does the LM21305SQE/NOPB achieve?
The LM21305SQE/NOPB achieves up to 95% efficiency at medium loads thanks to its synchronous rectification topology with low-RDS(on) integrated MOSFETs. At light loads, it supports pulse-skipping mode to maintain high efficiency.
What package is the LM21305SQE/NOPB in?
The device uses a 26-pin WQFN package with exposed thermal pad measuring 4mm x 5mm. The WQFN provides excellent thermal performance and low parasitic inductance, critical for high-current switching converter layouts.
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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.
| Qty. | Unit Price | Ext. Price |
|---|---|---|
| 1+ | $6.7500 | $6.75 |
| 5+ | $5.2019 | $26.01 |
| 6+ | $3.2760 | $19.66 |
| 17+ | $2.5200 | $42.84 |
| 51+ | $2.3522 | $119.96 |
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