LM5121MHE/NOPB
Active3-65V WIDE VIN, CURRENT MODE SYNCHRONOUS BOOST WITH DISCONNECTION SWITCH CONTROL
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LM5121MHE/NOPB
Active3-65V WIDE VIN, CURRENT MODE SYNCHRONOUS BOOST WITH DISCONNECTION SWITCH CONTROL
Technical Specifications
Parameters and characteristics for this part
| Specification | LM5121MHE/NOPB |
|---|---|
| Clock Sync | True |
| Control Features | Soft Start, Frequency Control |
| Duty Cycle (Max) [Max] | 100 % |
| Frequency - Switching [Max] | 1 MHz |
| Function | Step-Up |
| Mounting Type | Surface Mount |
| Number of Outputs | 1 |
| Operating Temperature [Max] | 125 ¯C |
| Operating Temperature [Min] | -40 °C |
| Output Configuration | Positive |
| Output Phases | 1 |
| Output Type | Transistor Driver |
| Package / Case | 20-PowerTSSOP |
| Package / Case | 0.173 in |
| Package / Case [custom] | 4.4 mm |
| Supplier Device Package | 20-HTSSOP |
| Synchronous Rectifier | False |
| Topology | Boost |
| Voltage - Supply (Vcc/Vdd) [Max] | 65 V |
| Voltage - Supply (Vcc/Vdd) [Min] | 4.5 V |
Pricing
Prices provided here are for design reference only. For realtime values and availability, please visit the distributors directly
| Distributor | Package | Quantity | $ | |
|---|---|---|---|---|
| Digikey | Cut Tape (CT) | 1 | $ 5.59 | |
| 10 | $ 5.02 | |||
| 25 | $ 4.75 | |||
| 100 | $ 4.12 | |||
| Digi-Reel® | 1 | $ 5.59 | ||
| 10 | $ 5.02 | |||
| 25 | $ 4.75 | |||
| 100 | $ 4.12 | |||
| Tape & Reel (TR) | 250 | $ 2.66 | ||
| 500 | $ 2.61 | |||
| Texas Instruments | SMALL T&R | 1 | $ 4.22 | |
| 100 | $ 3.70 | |||
| 250 | $ 2.59 | |||
| 1000 | $ 2.09 | |||
Description
General part information
LM5121-Q1 Series
The LM5121 is a synchronous boost controller intended for high-efficiency, high-power boost regulator applications. The control method is based upon peak current mode control. Current mode control provides inherent line feed-forward, cycle-by-cycle current limiting and ease of loop compensation.
The switching frequency is programmable up to 1 MHz. Higher efficiency is achieved using two robust N-channel MOSFET gate drivers with adaptive dead-time control. A user-selectable diode emulation mode enables discontinuous mode operation for improved efficiency at light load conditions.
The LM5121 provides disconnection switch control which completely disconnects the output from the input during an output short or a shutdown condition. During start-up sequence, inrush current is limited by the disconnection switch control.
Documents
Technical documentation and resources
