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NC4650 Series
Ultra-Low Quiescent Current (Iq = 70nA) Boost Switching Regulator with Low Ripple Mode

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Description

The NC4650 is a synchronous rectification boost switching regulator featuring ultra-low quiescent current of 70nA, utilizing a CMOS process. It is optimal for portable devices powered by coin or button batteries. With high efficiency under light load conditions, it is ideal for intermittent operation applications, ensuring long battery life. The MODE pin enables the selection of "Low Ripple Mode" for improved load transient response and reduced ripple. The EN pin allows shutdown operations, with options such as VIN-VOUT Complete Disconnect, VOUT discharge, and Pass-Through. Selecting the optimal version according to system sleep conditions enables system optimization.

Spec

Standard
Input Voltage Range 0.6 V to 5.5 V (6.5 V)
Operating Temperature Range TJ = -40°C to 125°C
Operating Quiescent Current Normal Mode：Typ. 70 nA (Ta = 25°C)
Low Ripple Mode：Typ. 90 µA (Ta = 25°C)
Output Voltage Range 1.8 V to 5.0 V (0.1 V step)
Output Voltage Accuracy ±1.5% (Ta = 25°C)
Switch Current Limit Typ. 1000 mA (VSET ≥2.5 V)
Typ. 650 mA (VSET <2.5 V)

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Protections / Functions

TSD ILX OCP OVP UVLO OVLO Reverse Shutdown Soft Start SSCG PGOOD Auto Discharge Anti-ringing Sequencing Max Duty Ext. Phase LED Adjust

Functional Description

TSD Thermal Shutdown Function
ILX LX Current Limit Function
OCP Overcurrent Protection
OVP Overvoltage Protection
UVLO Undervoltage Lockout Protection
OVLO Overvoltage Lockout Protection
Reverse Reverse Current Protection Circuit
Shutdown Shutdown Function
Soft Start Soft Start Function
SSCG Spread Spectrum Clock Generator Function
PGOOD Power Good Output
Auto Discharge Auto Discharge Function
Anti-ringing Anti-ringing Switch Function
Sequencing Start-up Sequencing Control
Max Duty Maximum Duty Cycle
Ext. Phase Externally Adjustable Phase Compensation
LED Adjust LED High-speed Dimming Control

Functional Description

TSD Thermal Shutdown Function
ILX LX Current Limit Function
OCP Overcurrent Protection
OVP Overvoltage Protection
UVLO Undervoltage Lockout Protection
OVLO Overvoltage Lockout Protection
Reverse Reverse Current Protection Circuit
Shutdown Shutdown Function
Soft Start Soft Start Function
SSCG Spread Spectrum Clock Generator Function
PGOOD Power Good Output
Auto Discharge Auto Discharge Function
Anti-ringing Anti-ringing Switch Function
Sequencing Start-up Sequencing Control
Max Duty Maximum Duty Cycle
Ext. Phase Externally Adjustable Phase Compensation
LED Adjust LED High-speed Dimming Control

Search for similar products under conditions below.

Category:DC/DC Switching Regulators

Topology Boost
VIN
min (V)		 0.6
VIN
max (V)		 5.5
VOUT
min (V)		 1.8
VOUT
max (V)		 5.0
IOUT
(mA)		 1000
ISS
(µA)		 0.07

Technical Documents

  • Typical Application

    Typical Application

  • Efficiency Typical Characteristics

    Efficiency Typical Characteristics

    VOUT = 3.3 V, MODE = "Low"

  • Related Links

    • Prime Designer

      Online Design Tool

      Registration to myNISD is required to use some of the functions, such as simulations.

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Quality & Packages

Product Name Compatibility Package Marking Reliability
NC4650ZAxxxxE2S
  • gradeConsumer
 WLCSP-6-ZA1 See Datasheet NC4650ZAS
  • Refer to the datasheets for the details on the product.
  • The package file or the datasheet includes package dimensions, taping specifications, taping reels dimensions, power dissipations, and recommended land pattern.

FAQ

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Buy / Contact

  • Purchase, Request for samples and documents
    Sales are made through distributors. Please contact your local distributors for any sales-related inquiry such as price.
  • Available from 1 piece!
    Our electronic device products are available through our authorized online distributors.
  • Technical Support
NC4650 Series