FGPF4533 Description


The LM5165DRCT is a 3- to 65-volt ultra-low IQ synchronous buck converter with outstanding efficiency across a wide input voltage and load current range. Up to 150 mA of output current can be provided with integrated high-side and low-side power MOSFETs at fixed output voltages of 3.3 V or 5 V or at an adjustable output. The converter is intended to make implementation as simple as possible while also giving choices for optimizing performance for the target application. For best light-load efficiency, PFM mode is chosen, or Constant On-Time (COT) control is chosen for a nearly constant running frequency.

Both control techniques provide outstanding line and load transient response and quick PWM on-time for large step-down conversion ratios while requiring no loop correction. The LM5165DRCT buck converter comes in a 10-pin, 3-mm x 3-mm VSON-10 packaging with a 0.5-mm pin pitch.


FGPF4533 Features



? Wide input voltage range (from 3 to 65 volts)

? No-load quiescent current of 10.5-μA

? Temperature range of –40°C to 150°C at the junction

? Output voltages that are fixed (3.3 V and 5 V) or adjustable

? EN55022 / CISPR 22 EMI requirements are met.

? 2-Ω PMOS buck switches integrated

– Supports a 100% duty cycle with little dropout

? 1-Ω NMOS synchronous rectifier integrated

– No external rectifier diode is required.

? Current limit setpoint programmable (four levels)

? PFM or COT mode operation is selectable.

? Internal voltage reference of 1.223 V ± 1%

? Internal or configurable 900-μs soft start

? Low EMI with active slew rate control

? Ultrahigh light-load efficiency performance with diode emulation mode and pulse skipping

? Start-up monotonic into prebiased output

? No bootstrap or loop compensation components

? Enable precision and enter UVLO with hysteresis.

? Compatible with the LM5166 pin-to-pin

? Hysteresis-based thermal shutdown protection

? VSON packaging, 10-pin, 3-mm x 3-mm

? For a faster time to market, use the TPSM265R1 module.

? Using WEBENCH? Power Designer, develop a custom regulator



FGPF4533 Applications



? Loop-powered sensors (4–20 mA)

? Vehicles and battery-operated equipment

? LDO replacement at high voltage

? Control systems for industry

? Bias supplies for general use