| Parameters | 
                                                                                                            
                                        | Mfr | Lumissil Microsystems | 
                                                                        
                                        | Series | - | 
                                                                        
                                        | Package | Tape & Reel (TR) | 
                                                                        
                                        | Product Status | Active | 
                                                                        
                                        | Type | DC DC Controller | 
                                                                        
                                        | Topology | SEPIC, Step-Down (Buck), Step-Up (Boost) | 
                                                                        
                                        | Internal Switch(s) | - | 
                                                                        
                                        | Number of Outputs | 1 | 
                                                                        
                                        | Voltage - Supply (Min) | 5V | 
                                                                        
                                        | Voltage - Supply (Max) | 75V | 
                                                                        
                                        | Voltage - Output | - | 
                                                                        
                                        | Current - Output / Channel | - | 
                                                                        
                                        | Frequency | 100kHz ~ 1MHz | 
                                                                        
                                        | Dimming | PWM | 
                                                                        
                                        | Applications | Automotive | 
                                                                        
                                        | Operating Temperature | -40°C ~ 125°C (TA) | 
                                                                        
                                        | Mounting Type | Surface Mount | 
                                                                        
                                        | Package / Case | 16-TSSOP (0.173", 4.40mm Width) Exposed Pad | 
                                                                        
                                        | Supplier Device Package | 16-eTSSOP | 
                                                                        
                                        | Base Product Number | IS32LT3957 | 
                                                                        
                                        | RoHS Status | ROHS3 Compliant | 
                                                                        
                                        | Moisture Sensitivity Level (MSL) | 3  (168 Hours) | 
                                                                        
                                        | REACH Status | REACH Unaffected | 
                                                                        
                                        | ECCN | EAR99 | 
                                                                        
                                        | HTSUS | 8542.39.0001 | 
                                                                        
                                        | Other Names | 2521-IS32LT3957A-ZLA3-CT | 
                                                                        
                                        | Standard Package | 2,500 | 
                                                                                                        
                            
                         
                                                LED Driver IC 1 Output DC DC Controller SEPIC, Step-Down (Buck), Step-Up (Boost) PWM Dimming 16-eTSSOP