LM5143QRHARQ1
ActiveAUTOMOTIVE, 3.5-V TO 65-V LOW-IQ, DUAL OUTPUT, STACKABLE SYNCHRONOUS BUCK DC-DC CONTROLLER
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LM5143QRHARQ1
ActiveAUTOMOTIVE, 3.5-V TO 65-V LOW-IQ, DUAL OUTPUT, STACKABLE SYNCHRONOUS BUCK DC-DC CONTROLLER
Technical Specifications
Parameters and characteristics for this part
| Specification | LM5143QRHARQ1 |
|---|---|
| Clock Sync | True |
| Control Features | Dead Time Control, Power Good, Tracking, Current Limit, Soft Start, Frequency Control, Enable |
| Frequency - Switching [Max] | 2.2 MHz |
| Frequency - Switching [Min] | 100 kHz |
| Function | Step-Down |
| Mounting Type | Wettable Flank, Surface Mount |
| Number of Outputs | 2 |
| Operating Temperature [Max] | 150 °C |
| Operating Temperature [Min] | -40 °C |
| Output Configuration | Positive |
| Output Phases | 2 |
| Output Type | Transistor Driver |
| Package / Case | 40-VFQFN Exposed Pad |
| Supplier Device Package | 40-VQFN (6x6) |
| Synchronous Rectifier | True |
| Topology | Buck |
| Voltage - Supply (Vcc/Vdd) [Max] | 65 V |
| Voltage - Supply (Vcc/Vdd) [Min] | 3.5 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 | $ 4.23 | |
| 10 | $ 3.84 | |||
| 25 | $ 3.75 | |||
| 50 | $ 3.73 | |||
| 100 | $ 3.35 | |||
| 250 | $ 3.34 | |||
| 500 | $ 3.21 | |||
| 1000 | $ 3.06 | |||
| Digi-Reel® | 1 | $ 4.23 | ||
| 10 | $ 3.84 | |||
| 25 | $ 3.75 | |||
| 50 | $ 3.73 | |||
| 100 | $ 3.35 | |||
| 250 | $ 3.34 | |||
| 500 | $ 3.21 | |||
| 1000 | $ 3.06 | |||
| Tape & Reel (TR) | 2500 | $ 3.02 | ||
| Texas Instruments | LARGE T&R | 1 | $ 3.94 | |
| 100 | $ 3.46 | |||
| 250 | $ 2.42 | |||
| 1000 | $ 1.95 | |||
Description
General part information
LM5143A-Q1 Series
The LM5143A-Q1 is a 65-V DC/DC synchronous buck controller for high-current single or dual outputs. Deriving from a family of wide-VINrange controllers, the device uses an interleaved, stackable, peak current-mode control architecture for easy loop compensation, fast transient response, excellent load and line regulation, and accurate current sharing with paralleled phases for higher output current. A high-side switch minimum on time of 65 ns provides large step-down ratios, enabling the direct conversion from 12-V, 24-V, or 48-V inputs to low-voltage rails for reduced system complexity and cost. The LM5143A-Q1 continues to operate during input voltage dips as low as 3.5 V, at nearly 100% duty cycle if needed.
The 15-µA no-load quiescent current with the output voltage in regulation extends operating run-time in battery-powered automotive systems. Power the LM5143A-Q1 from the output of the switching regulator or another available source for even lower input quiescent current and power loss.
The LM5143A-Q1 is a 65-V DC/DC synchronous buck controller for high-current single or dual outputs. Deriving from a family of wide-VINrange controllers, the device uses an interleaved, stackable, peak current-mode control architecture for easy loop compensation, fast transient response, excellent load and line regulation, and accurate current sharing with paralleled phases for higher output current. A high-side switch minimum on time of 65 ns provides large step-down ratios, enabling the direct conversion from 12-V, 24-V, or 48-V inputs to low-voltage rails for reduced system complexity and cost. The LM5143A-Q1 continues to operate during input voltage dips as low as 3.5 V, at nearly 100% duty cycle if needed.
Documents
Technical documentation and resources