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Nisshinbo NC4650 Boost Switching Regulators

Nisshinbo NC4650 Boost Switching Regulators utilize a CMOS process to feature an ultra-low quiescent current of 70nA. This feature is optimal for portable devices powered by button or coin batteries. It is ideal for intermittent operation applications, offering high efficiency under light load conditions and ensuring long battery life.

The MODE pin of the Nisshinbo NC4650 enables low-ripple mode, providing reduced ripple and improved load transient response. The EN pin enables shutdown operations, with options such as VOUT discharge, VIN-VOUT complete disconnect, and pass-through. Selecting the optimal version according to system sleep conditions enhances system optimization.

Features

  • -40°C to +125°C operating junction temperature range
  • 0.6V to 5.5V input voltage range, 6.5V maximum
  • 0.8V (typ.) startup voltage
  • 1.8V to 5.0V (int. fixed) output voltage range
  • Quiescent current (VOUT)
    • 70nA (typ.) in normal mode
    • 90μA (typ) in low ripple mode
  • 50nA (typ.) shutdown current
  • Efficiency at 85% (typ.) with VIN = 1.5V, VOUT = 3.3V, IOUT = 10μA
  • Soft start function
  • Switch current limit
    • 1A (typ.) (VSET ≥ 2.5V)
    • 0.65A (typ.) (VSET < 2.5V)
  • Thermal shutdown function
    • +150°C (typ.) detection temperature
    • +100°C (typ.) release temperature
  • Buck operation or pass-through when VIN > VOUT
  • Manual switching between normal mode and low ripple mode via the MODE pin
  • Multiple versions for shutdown behavior

Applications

  • Internet of Things (IoT) edge devices
  • Devices powered by coin/button/dry batteries
  • Alarms, smartwatches, etc.

NC4650A/C/D Block Diagram

Block Diagram - Nisshinbo NC4650 Boost Switching Regulators

NC4650B Block Diagram

Block Diagram - Nisshinbo NC4650 Boost Switching Regulators
Publié le: 2025-10-29 | Mis à jour le: 2025-11-04