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LM3420M5X-8.4 from NATIONAL,National Semiconductor

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LM3420M5X-8.4

Manufacturer: NATIONAL, NS国半, NAS, NS

Lithium-Ion Battery Charge Controller
Partnumber Manufacturer Quantity Availability
LM3420M5X-8.4,LM3420M5X84 NATIONAL, NS国半, NAS, NS 107794 In Stock

Description and Introduction

Lithium-Ion Battery Charge Controller The LM3420M5X-8.4 is a battery charge controller from National Semiconductor (now part of Texas Instruments).  

### **Specifications:**  
- **Manufacturer:** National Semiconductor  
- **Part Number:** LM3420M5X-8.4  
- **Type:** Lithium-Ion Battery Charge Controller  
- **Output Voltage:** 8.4V (for two-cell Li-Ion batteries)  
- **Package:** SOT-23-5 (M5)  
- **Input Voltage Range:** 4.5V to 36V  
- **Charge Termination:** Voltage-based (constant-voltage/constant-current)  
- **Features:**  
  - Programmable charge current  
  - Thermal regulation for safe operation  
  - Reverse battery protection  
  - Low shutdown current  

### **Description:**  
The LM3420M5X-8.4 is designed to manage the charging process for two-cell lithium-ion (Li-Ion) batteries. It ensures safe and efficient charging by regulating voltage and current.  

### **Features:**  
- **Constant-Current/Constant-Voltage (CC/CV) Charging**  
- **Integrated Thermal Protection**  
- **Wide Input Voltage Range (4.5V–36V)**  
- **Low Power Consumption in Shutdown Mode**  
- **Compact SOT-23-5 Package**  

This IC is commonly used in portable electronics requiring precise Li-Ion battery charging.  

Would you like additional details on pinout or application circuits?

Application Scenarios & Design Considerations

Lithium-Ion Battery Charge Controller

Alternative Part Number

  • BQ2057WSN --: Single-cell Li-ion linear charge controller with similar function and pin-compatible package, widely available and directly replaces the LM3420 charge management role.
  • MCP73831T-2ACI/OT --: Compact single-cell Li-ion/Li-Po charge management controller with programmable current, suitable drop-in for small battery charger designs using the LM3420.
  • LTC4054ES5-4.2 --: Standalone linear Li-ion battery charger in a small SOT-23 package, functionally equivalent for single-cell charging applications.
  • BQ24074RGTR --: Single-cell Li-ion charger IC from TI (which acquired National Semiconductor) with similar charge-management function and wide availability.
  • TP4056 --: Low-cost single-cell Li-ion linear charger IC widely used as a replacement in battery charging circuits with similar voltage regulation behavior.
  • LT1510CS8 --: Current-mode battery charger IC supporting Li-ion chemistry with programmable charge voltage, a viable alternative for 8.4V battery charging applications.

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