LM51551DSSR
Boost Switching Regulator IC 1 Output WSON-12(2x3)
Wide-input Asynchronous Boost, SEPIC, Flyback Controllers
- Manufacturer
- TI
- Manufacturer part #
- LM51551DSSR
- Store part #
- C778612
- Package / case
- WSON-12(2x3)
- Category
- DC DC Switching Controllers
- Packaging
- Tape & Reel (TR)
Every Order Guarantee
100% Authentic · 30-Day Return or Replacement · policy
2,338 in stock
#C778612
Stock & price checked 6 days ago
| Quantity | Unit price | Pack price |
|---|---|---|
| 1+ | ₹223.28 | ₹223.28 |
| 10+ | ₹188.09 | ₹1,880.90 |
| 30+ | ₹168.76 | ₹5,062.80 |
| 100+ | ₹147.04 | ₹14,704.00 |
| 500+ | ₹137.27 | ₹68,635.00 |
| 1,000+ | ₹132.92 | ₹1,32,920.00 |
1 × ₹223.28
₹223.28
excl. GST
₹263.47 incl. 18% GST
- Dispatch in 7–10 working days
- GST invoice with every order
- Standard pack: 3,000 per reel
LM51551DSSR
₹223.28 for 1 + GST
Specifications
- Synchronous Rectifier
- No
- Features
- Cycle-by-cycle current limiting;Hiccup current limiting;Adjustable soft-start;Frequency synchronization;Operating status indication;Overcurrent Protection
- Number of Channels
- 1
- Topology
- Boost;Flyback;SEPIC
- Operating Voltage
- 2.97V~45V
- Switch tube (built-in/external)
- External
- Operating Temperature
- -40℃~+125℃@(TJ)
- Frequency - Switching
- 2.2MHz
- Output Type
- Adjustable
- Function
- Boost
- Quiescent Current
- 480uA
Packaging & compliance
- RoHS
- ROHS3 Compliant
- Lifecycle
- Active
- ECCN
- EAR99
- Packaging
- Tape & Reel (TR)
- Standard pack
- 3,000 / Reel
- Sold per
- Piece
- Minimum order
- 1
- Unit weight
- 0.34 g
Overview
LM5155x（LM5155 和 LM51551）是一款采用峰值电流模式控制的宽输入范围非同步升压控制器。该器件可用于升压、SEPIC 和反激式拓扑。 如果 BIAS 引脚连接到 VCC 引脚，则 LM5155x 可由单节电池（最低电压 2.97V）供电。如果 BIAS 引脚电压高于 3.5V，则该器件可使用低至 1.5V 的输入电源电压。 内部 VCC 稳压器还支持 BIAS 引脚工作电压高达 45 V（绝对最大值 50 V）。开关频率可通过外部电阻动态编程，范围为 100 kHz 至 2.2 MHz。在 2.2 MHz 下开关可最大程度降低 AM 频段干扰，并实现小型化方案尺寸和快速瞬态响应。 该器件配备 1.5 A 标准 MOSFET 驱动器，电流限制阈值低至 100 mV。该器件还支持使用外部 VCC 电源以提高效率。低工作电流和跳脉冲工作模式可在轻载时提升效率。 该器件内置多种保护功能，包括逐周期电流限制、过压保护、线路 UVLO 和热关断。LM51551 器件选项支持打嗝模式过载保护。其他功能包括低关断 IQ、可编程软启动、可编程斜率补偿、精密基准、电源正常指示器和外部时钟同步。
Applications
- Multi-output flyback applications without optocoupler
- LED bias power supply
- Wide-input boost, SEPIC, and flyback power modules
- Portable speaker applications
- Battery-powered boost, SEPIC, and flyback applications
Key features
- Functional safety support with documentation for functional safety system design; wide input operating range for battery applications
- 3.5V to 45V operating range; 2.97V to 16V when BIAS = VCC
- Minimum boost supply voltage of 1.5V when BIAS voltage ≥ 3.5V
- Input transient protection up to 50V
- Minimum battery drain with low shutdown current (IQ ≤ 2.6μA)
- Low operating current (IQ ≤ 480μA)
- Small solution size and low cost
- Maximum switching frequency of 2.2MHz
- 12-pin WSON package (3mm×2mm)
- Integrated error amplifier for primary-side regulation (flyback) without optocoupler
- Minimized undershoot during startup (start/stop applications)
- Low power consumption, high efficiency
- 100mV ±7% low current limit threshold
- Robust 1.5A peak standard MOSFET driver
- External VCC supply support
- Avoids AM band interference and crosstalk; optional clock synchronization; dynamically programmable switching frequency from 100kHz to 2.2MHz
- Integrated protection features
- Constant peak current limit across input voltage range
- Optional discontinuous mode short-circuit protection
- Programmable line UVLO
- OVP protection
- Thermal shutdown protection
- Precise ±1% accuracy feedback reference
- Programmable additional slope compensation
- Adjustable soft-start
- PGOOD indicator
- Create custom designs with LM5155x using WEBENCH Power Designer
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