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.
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Spec
Consumer 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)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 
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Technical
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Typical Application
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Efficiency Typical Characteristics
VOUT = 3.3 V, MODE = "Low"
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Related Links
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Quality &
PackagesProduct Name Compatibility Package Marking Reliability NC4650ZAxxxxE2S 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.
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Sample / Buy
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Buy Online
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Buy, Request for Samples, Request for Information Materials
Authorized Distributors
Please contact your local distributors for any sales-related inquiry such as price, stock, delivery, etc.
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Download Datasheet
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 |