The LM5163 synchronous buck converter is designed to regulate over a wide input voltage range, minimizing the need for external surge suppression components. A minimum controllable on-time of 50 ns facilitates large step-down conversion ratios, enabling the direct step-down from a 48-V nominal input to low-voltage rails for reduced system complexity and solution cost. The LM5163 operates during input voltage dips as low as 6 V, at nearly 100% duty cycle if needed, making it an excellent choice for wide input supply range industrial and high cell count battery pack applications.
With integrated high-side and low-side power MOSFETs, the LM5163 delivers up to 0.5-A of output current. A constant on-time (COT) control architecture provides nearly constant switching frequency with excellent load and line transient response. Additional features of the LM5163 include ultra-low IQ and diode emulation mode operation for high light-load efficiency, innovative peak and valley overcurrent protection, integrated VCC bias supply and bootstrap diode, precision enable and input UVLO, and thermal shutdown protection with automatic recovery. An open-drain PGOOD indicator provides sequencing, fault reporting, and output voltage monitoring.
The LM5163 is available in a thermally-enhanced, 8-pin SO PowerPAD™ package. Its 1.27-mm pin pitch provides adequate spacing for high-voltage applications.
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Part number | Order | Vin (Min) (V) | Vin (Max) (V) | Vout (Min) (V) | Vout (Max) (V) | Iout (Max) (A) | Regulated outputs (#) | Switching frequency (Min) (kHz) | Switching frequency (Max) (kHz) | Iq (Typ) (mA) | Features | Control mode | Duty cycle (Max) (%) | Operating temperature range (C) | Rating | Package Group | Type | Package size: mm2:W x L (PKG) |
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
LM5163 |
|
6 | 100 | 1.2 | 90 | 0.5 | 1 | 75 | 1000 | 0.0105 |
Enable
Light Load Efficiency Over Current Protection Power Good Soft Start Fixed Synchronous Rectification |
Constant on-time (COT) | 99 | -40 to 150 | Catalog | SO PowerPAD | 8 | Converter | 8SO PowerPAD: 19 mm2: 3.9 x 4.89 (SO PowerPAD | 8) |
LM5163-Q1 |
|
6 | 100 | 1.2 | 90 | 0.5 | 1 | 75 | 1000 | 0.0105 |
Enable
Light Load Efficiency Over Current Protection Power Good Pre-Bias Start-Up Soft Start Fixed Synchronous Rectification UVLO Adjustable Soft Start Fixed |
Constant on-time (COT) | 99 | -40 to 150 | Automotive | SO PowerPAD | 8 | Converter | 8SO PowerPAD: 19 mm2: 3.9 x 4.89 (SO PowerPAD | 8) |
LM5164 |
|
6 | 100 | 1.2 | 90 | 1 | 1 | 75 | 1000 | 0.01 |
Enable
Light Load Efficiency Over Current Protection Power Good Pre-Bias Start-Up Synchronous Rectification UVLO Adjustable |
Constant on-time (COT) | 99 | -40 to 150 | Catalog | SO PowerPAD | 8 | Converter | 8SO PowerPAD: 19 mm2: 3.9 x 4.89 (SO PowerPAD | 8) |