| Parameters | 
                                                                                                                        
                                                | Operating Temperature | -40°C ~ 85°C (TA) | 
                                                                                    
                                                | Mounting Type | Surface Mount | 
                                                                                    
                                                | Package / Case | 20-UFBGA, WLCSP | 
                                                                                    
                                                | Supplier Device Package | 20-WLCSP (1.87x2.1) | 
                                                                                    
                                                | Base Product Number | RT9458 | 
                                                                                    
                                                | RoHS Status | ROHS3 Compliant | 
                                                                                    
                                                | Moisture Sensitivity Level (MSL) | 3  (168 Hours) | 
                                                                                    
                                                | REACH Status | REACH Unaffected | 
                                                                                    
                                                | ECCN | EAR99 | 
                                                                                    
                                                | HTSUS | 8542.39.0001 | 
                                                                                    
                                                | Standard Package | 3,000 | 
                                                                                    
                                                | Mfr | Richtek USA Inc. | 
                                                                                    
                                                | Series | - | 
                                                                                    
                                                | Package | Tape & Reel (TR) | 
                                                                                    
                                                | Product Status | Active | 
                                                                                    
                                                | Battery Chemistry | Lithium Ion/Polymer | 
                                                                                    
                                                | Number of Cells | 1 | 
                                                                                    
                                                | Current - Charging | Constant | 
                                                                                    
                                                | Programmable Features | - | 
                                                                                    
                                                | Fault Protection | Over Temperature, Over Voltage | 
                                                                                    
                                                | Charge Current - Max | 1.55A | 
                                                                                    
                                                | Battery Pack Voltage | 4.44V (Max) | 
                                                                                    
                                                | Voltage - Supply (Max) | 6V | 
                                                                                    
                                                | Interface | I²C | 
                                                                                                                
                                
                             
                                                Charger IC Lithium Ion/Polymer 20-WLCSP (1.87x2.1)