| Parameters | 
                                    
                                                                                                            
                                        | Mfr | 
                                        National Semiconductor | 
                                    
                                                                        
                                        | Series | 
                                        - | 
                                    
                                                                        
                                        | Package | 
                                        Bulk | 
                                    
                                                                        
                                        | Product Status | 
                                        Active | 
                                    
                                                                        
                                        | Type | 
                                        DC DC Regulator | 
                                    
                                                                        
                                        | Topology | 
                                        Step-Up (Boost) | 
                                    
                                                                        
                                        | Internal Switch(s) | 
                                        Yes | 
                                    
                                                                        
                                        | Number of Outputs | 
                                        1 | 
                                    
                                                                        
                                        | Voltage - Supply (Min) | 
                                        2.7V | 
                                    
                                                                        
                                        | Voltage - Supply (Max) | 
                                        7.5V | 
                                    
                                                                        
                                        | Voltage - Output | 
                                        - | 
                                    
                                                                        
                                        | Current - Output / Channel | 
                                        800mA (Switch) | 
                                    
                                                                        
                                        | Frequency | 
                                        1.2MHz | 
                                    
                                                                        
                                        | Dimming | 
                                        - | 
                                    
                                                                        
                                        | Applications | 
                                        Backlight | 
                                    
                                                                        
                                        | Operating Temperature | 
                                        -40°C ~ 85°C (TA) | 
                                    
                                                                        
                                        | Mounting Type | 
                                        Surface Mount | 
                                    
                                                                        
                                        | Package / Case | 
                                        8-WFDFN Exposed Pad | 
                                    
                                                                        
                                        | Supplier Device Package | 
                                        8-WSON (3x3) | 
                                    
                                                                        
                                        | Base Product Number | 
                                        LM3557 | 
                                    
                                                                        
                                        | RoHS Status | 
                                        RoHS non-compliant | 
                                    
                                                                        
                                        | Moisture Sensitivity Level (MSL) | 
                                        1  (Unlimited) | 
                                    
                                                                        
                                        | REACH Status | 
                                        REACH Affected | 
                                    
                                                                        
                                        | ECCN | 
                                        EAR99 | 
                                    
                                                                        
                                        | HTSUS | 
                                        8542.39.0001 | 
                                    
                                                                        
                                        | Standard Package | 
                                        1 | 
                                    
                                                                                                        
                            
                         
                                                LED Driver IC 1 Output DC DC Regulator Step-Up (Boost) Dimming 800mA (Switch) 8-WSON (3x3)