LM5121MHX/NOPB
Boost Switching Regulator IC 1 Output HTSSOP-20-EP
Wide-input synchronous boost controller with disconnect switch control
- Manufacturer
- TI
- Manufacturer part #
- LM5121MHX/NOPB
- Store part #
- C1848483
- Package / case
- HTSSOP-20-EP
- Category
- DC DC Switching Controllers
- Packaging
- Tape & Reel (TR)
Every Order Guarantee
100% Authentic · 30-Day Return or Replacement · policy
2,361 in stock
#C1848483
Stock & price checked 6 days ago
| Quantity | Unit price | Pack price |
|---|---|---|
| 1+ | ₹473.50 | ₹473.50 |
| 10+ | ₹401.13 | ₹4,011.30 |
| 30+ | ₹358.33 | ₹10,749.90 |
| 100+ | ₹314.87 | ₹31,487.00 |
| 500+ | ₹294.88 | ₹1,47,440.00 |
| 1,000+ | ₹285.75 | ₹2,85,750.00 |
1 × ₹473.50
₹473.50
excl. GST
₹558.73 incl. 18% GST
- Dispatch in 7–10 working days
- GST invoice with every order
- Standard pack: 2,500 per reel
LM5121MHX/NOPB
₹473.50 for 1 + GST
Specifications
- Synchronous Rectifier
- Yes
- Features
- Adjustable current limiting;Cycle-by-cycle current limiting;Hiccup current limiting;Adjustable soft-start;Load disconnect;Frequency synchronization;Light load efficient mode;Overcurrent Protection
- Number of Channels
- 1
- Topology
- Boost
- Operating Voltage
- 4.5V~65V
- Switch tube (built-in/external)
- External
- Operating Temperature
- -40℃~+125℃@(TJ)
- Frequency - Switching
- 1MHz
- Output Type
- Adjustable
- Function
- Boost
- Quiescent Current
- 9uA
Packaging & compliance
- RoHS
- ROHS3 Compliant
- Lifecycle
- Active
- ECCN
- EAR99
- Packaging
- Tape & Reel (TR)
- Standard pack
- 2,500 / Reel
- Sold per
- Piece
- Minimum order
- 1
- Unit weight
- 0.001 g
Overview
The LM5121 is a synchronous boost controller designed for high-efficiency, high-power boost regulator applications. The control method is based on peak current mode control, which provides inherent line feedforward, cycle-by-cycle current limiting, and simplified loop compensation. Switching frequency is programmable up to 1MHz. Higher efficiency is achieved by combining two robust N-channel MOSFET gate drivers with adaptive dead-time control. A user-selectable diode emulation mode enables discontinuous mode operation, improving efficiency under light load conditions. The LM5121 features a disconnect switch control that fully isolates the output from the input during output short-circuit conditions or shutdown. During the startup sequence, the disconnect switch control limits inrush current. An internal charge pump allows the high-side synchronous switch to operate at 100% duty cycle (bypass operation). Additional features include: thermal shutdown, frequency synchronization, discontinuous mode current limiting, and adjustable line undervoltage lockout.
Applications
- 12V, 24V, and 48V power supply systems
- Automotive start-stop
- High-current boost power supplies
- Battery-powered systems
Key features
- AEC-Q100 Grade 1 (TA = -40°C to 125°C)
- Maximum input voltage: 65V
- Minimum input voltage: 3.0V (4.5V at startup)
- Output voltage up to 100V
- Pass-through (VOUT = VIN) operation
- 1.2V reference voltage with ±1.0% accuracy
- Free-running/synchronous operation frequency up to 1MHz
- Peak current mode control
- Robust 3A integrated gate driver
- Adaptive dead-time control
- Optional diode emulation mode
- Programmable cycle-by-cycle current limit
- Programmable line UVLO
- Programmable soft-start
- Thermal shutdown protection
- Low shutdown quiescent current: 9μA
- Programmable slope compensation
- Programmable skip-cycle mode for reduced standby power
- External VCC bias supply option
- Load disconnect in shutdown (true shutdown) mode
- Inrush current limiting
- Discontinuous mode short-circuit/overload protection
- Circuit breaker function
- Input transient suppression capability
- Battery reverse protection with thermally enhanced 20-pin HTSSOP package
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