ZCC5143 同步降压直流控制器，替代LM5143

四维电子

Descriptions
The is a 65V synchronous step-downDC/DC controller for high current single or dual outputs.The device features an interleaved, stackable peakcurrent mode control architecture for simple loopcompensation, fast transient response, excellent loadand line regulation, and precise current sharing throughparallel phasing for high output currents. 65ns ofultra-short on-time for the high-side switch facilitateslarge buck ratios and supports direct buck conversionfrom 12V, 24V, or 48V automotive inputs to lowervoltage rails, reducing system complexity and solutioncost. The can continue to operate at nearly100% duty cycle as needed even when the inputvoltage drops abruptly to 3.5V. Ultra-high efficiency isachieved by
1 O% x, }# s# r9 ^Using an inductor DCR to detect the current, and ashunt resistor can be used to detect it with highaccuracy. 15uA no-load quiescent current andregulated output voltage extends the operating runtimeof battery-powered systems. The can bepowered by the output of a switching regulator or otheravailable power sources. By utilizing the output of aswitching regulator or other available power supply topower the , lower input quiescent current andpower loss can be achieved
Features
  I" Z- k5 \  `- @- P1 L0 sVIN input voltage range: +3.5V ~ +65V
1% accuracy, 3.3V/5V fixed or 0.6V to 55V adjustableoutput voltage
' X8 I7 N$ T) O: C% ~( YShutdown Mode Current: 4µA (Typ.)
" z7 C  V' J# }No-load standby current: 15 µA (Typ.)
Dual channel or single output multi-phase
65ns tON(min) for high VIN/VOUT ratio 60ns tOFF(min) for low voltage drop
& @* ~7 n9 t& A/ R/ }Hiccup mode over-current protection
& M  c/ C$ m0 i+ G- TVCC, VDDA and Gate Drive UVLO Protection
: I) i" U$ m- h; u  h0 }9 F' OThermal shutdown protection with hysteresis
Adaptive Gate Driver Controlled by Voltage Slew Rate
Switching frequency range of 100kHz to 2.2MHz
6 n( U; f/ a7 \/ s* NOptional diode emulation or FPWM VQFNP6X6-40 package
Applications
Automotive Electronic Systems Advanced Driver Assistance System(ADAS)
Infotainment & Instrumentation Systems
6 s' n/ I; [( X* W& n8 n