LM5117PSQX/NOPB
Active5.5-65V WIDE VIN, CURRENT MODE SYNCHRONOUS BUCK CONTROLLER WITH ANALOG CURRENT MONITOR
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LM5117PSQX/NOPB
Active5.5-65V WIDE VIN, CURRENT MODE SYNCHRONOUS BUCK CONTROLLER WITH ANALOG CURRENT MONITOR
Technical Specifications
Parameters and characteristics for this part
| Specification | LM5117PSQX/NOPB |
|---|---|
| Clock Sync | False |
| Control Features | Frequency Control, Ramp, Soft Start |
| Frequency - Switching | 480 kHz, 200 kHz |
| Function | Step-Down |
| 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 | 24-WFQFN Exposed Pad |
| Supplier Device Package | 24-WQFN (4x4) |
| Synchronous Rectifier | True |
| Topology | Buck |
| Voltage - Supply (Vcc/Vdd) [Max] | 65 V |
| Voltage - Supply (Vcc/Vdd) [Min] | 5.5 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 | $ 5.44 | |
| Digi-Reel® | 1 | $ 5.44 | ||
| Tape & Reel (TR) | 4500 | $ 2.73 | ||
| Texas Instruments | LARGE T&R | 1 | $ 3.74 | |
| 100 | $ 3.05 | |||
| 250 | $ 2.40 | |||
| 1000 | $ 2.03 | |||
Description
General part information
LM5117-Q1 Series
The LM5117 is a synchronous buck controller intended for step-down regulator applications from a high voltage or widely varying input supply. The control method is based upon current mode control utilizing an emulated current ramp. Current mode control provides inherent line feed-forward, cycle-by-cycle current limiting and ease of loop compensation. The use of an emulated control ramp reduces noise sensitivity of the pulse-width modulation circuit, allowing reliable control of very small duty cycles necessary in high input voltage applications.
The operating frequency is programmable from 50 kHz to 750 kHz. The LM5117 drives external high-side and low-side NMOS power switches with adaptive dead-time control. A user-selectable diode emulation mode enables discontinuous mode operation for improved efficiency at light load conditions. A high voltage bias regulator that allows external bias supply further improves efficiency. The LM5117’s unique analog telemetry feature provides average output current information. Additional features include thermal shutdown, frequency synchronization, hiccup mode current limit, and adjustable line undervoltage lockout.
The LM5117 is a synchronous buck controller intended for step-down regulator applications from a high voltage or widely varying input supply. The control method is based upon current mode control utilizing an emulated current ramp. Current mode control provides inherent line feed-forward, cycle-by-cycle current limiting and ease of loop compensation. The use of an emulated control ramp reduces noise sensitivity of the pulse-width modulation circuit, allowing reliable control of very small duty cycles necessary in high input voltage applications.
Documents
Technical documentation and resources