The LM656x5 are a family of buck converters designed for high efficiency, high-power density, and ultra-low electromagnetic interference (EMI). The converters operate over a wide input voltage range of 3V to 65V (70V transient < 100ms), reducing the need for external input surge protection. The LM656x5 comes with pin selectable fixed output voltages of 3.3V and 5V or in adjustable configuration. The low EMI operation is enabled with minimized loop inductance and optimized switch node slew rate. A pin-selectable ±5% or ±10% dual-random spread spectrum (DRSS) significantly reduces peak emissions through a combination of triangular and pseudo-random modulation while keeping output voltage ripple very low. The current-mode control architecture with a 30ns typical minimum on-time allows high conversion ratios at high frequencies coupled with a fast transient response and excellent load and line regulation.
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View full reportTechnical parameters
| Environment and package | |
|---|---|
| Operating temperature range (°C) | -40 to 150 |
| Other | |
| Control mode | current mode |
| Duty cycle (max) (%) | 98 |
| EMI features | Fixed-frequency control, Low parasitic packaging, Mitigated interference & noise technology – architecture 1 (MINT 1), Pinout optimization, Spread Spectrum, Switch-node waveshaping |
| Features | Adjustable switching frequency, Auto Mode, Enable, Fixed Output, Forced PWM, Frequency synchronization, Overcurrent protection, Power good, Spread Spectrum, Thermal shutdown, UVLO adjustable |
| Iout (max) (A) | 4.5 |
| Rating | Catalog |
| TI functional safety category | Functional Safety-Capable |
| Topology | Buck |
| Vin (max) (V) | 65 |
| Vin (min) (V) | 3 |
| Vout (max) (V) | 40 |
| Vout (min) (V) | 0.8 |