LM5148RGYR
ActiveSTEP-DOWN TYPE 3.5V~80V VQFN-24(5.5X3.5) DC-DC CONVERTERS ROHS
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LM5148RGYR
ActiveSTEP-DOWN TYPE 3.5V~80V VQFN-24(5.5X3.5) DC-DC CONVERTERS ROHS
Technical Specifications
Parameters and characteristics for this part
| Specification | LM5148RGYR |
|---|---|
| Clock Sync | True |
| Control Features | Frequency Control, Ramp, Phase Control, Dead Time Control, Enable, Current Limit, Soft Start, Power Good |
| Duty Cycle (Max) [Max] | 100 % |
| Frequency - Switching [Max] | 2.2 MHz |
| Frequency - Switching [Min] | 100 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-VFQFN Exposed Pad |
| Supplier Device Package | 24-VQFN (3.5x5.5) |
| Synchronous Rectifier | True |
| Topology | Buck |
| Voltage - Supply (Vcc/Vdd) [Max] | 80 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 | $ 1.80 | |
| 10 | $ 1.62 | |||
| 25 | $ 1.53 | |||
| 100 | $ 1.30 | |||
| 250 | $ 1.22 | |||
| 500 | $ 1.07 | |||
| 1000 | $ 0.89 | |||
| Digi-Reel® | 1 | $ 1.80 | ||
| 10 | $ 1.62 | |||
| 25 | $ 1.53 | |||
| 100 | $ 1.30 | |||
| 250 | $ 1.22 | |||
| 500 | $ 1.07 | |||
| 1000 | $ 0.89 | |||
| Tape & Reel (TR) | 3000 | $ 0.82 | ||
| 6000 | $ 0.79 | |||
| LCSC | Piece | 1 | $ 1.20 | |
| 10 | $ 0.99 | |||
| 30 | $ 0.88 | |||
| 100 | $ 0.75 | |||
| 500 | $ 0.69 | |||
| 1000 | $ 0.67 | |||
| Texas Instruments | LARGE T&R | 1 | $ 1.35 | |
| 100 | $ 1.12 | |||
| 250 | $ 0.80 | |||
| 1000 | $ 0.60 | |||
Description
General part information
LM5148 Series
The LM5148 is a 80-V, ultra-low IQsynchronous buck DC/DC controller for high-current, single-output applications. The controller uses a peak current-mode control architecture for easy loop compensation, fast transient response, and excellent load and line regulation. The LM5148 can be set up in idual-phase mode (paralleled output) with accurate current sharing for high-current applications. It can operate at input voltages as low as 3.5 V, at nearly 100% duty cycle if needed.
The LM5148 has a unique EMI reduction feature known as dual random spread spectrum (DRSS). Combining low-frequency triangular and high-frequency random modulations mitigates EMI disturbances across lower and higher frequency bands, respectively. This hybrid technique aligns with the multiple resolution bandwidth (RBW) settings specified in industry-standard EMC tests.
Additional features of the LM5148 include 150°C maximum junction temperature operation, user-selectable diode emulation for lower current consumption at light-load conditions, open-drain power-good flag for fault reporting and output monitoring, precision enable input, monotonic start-up into prebiased load, integrated VCC bias supply regulator, internal 3-ms soft-start time, and thermal shutdown protection with automatic recovery.
Documents
Technical documentation and resources