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| Part Number | ISL9443IRZ-T7A | ISL9444IRZ-T7A | 
|---|---|---|
| Manufacturer | Renesas Electronics America Inc | Renesas Electronics America Inc | 
| Product Status | Obsolete | Active | 
| Output Type | Transistor Driver | Transistor Driver | 
| Function | Step-Down | Step-Down | 
| Output Configuration | Positive | Positive | 
| Topology | Buck | Buck | 
| Number of Outputs | 3 | 3 | 
| Output Phases | 2 | 2 | 
| Voltage - Supply (Vcc/Vdd) | 4.5V ~ 28V | 4.5V ~ 28V | 
| Frequency - Switching | 600kHz ~ 1.2MHz | 200kHz ~ 1.2MHz | 
| Duty Cycle (Max) | - | - | 
| Synchronous Rectifier | Yes | Yes | 
| Clock Sync | Yes | Yes | 
| Serial Interfaces | - | - | 
| Control Features | Current Limit, Enable, Frequency Control, Power Good, Soft Start, Tracking | Enable, Frequency Control, Phase Control, Power Fail, Power Good, Soft Start, Tracking | 
| Operating Temperature | -40°C ~ 85°C (TA) | -40°C ~ 85°C (TA) | 
| Mounting Type | Surface Mount | Surface Mount | 
| Package / Case | 32-VFQFN Exposed Pad | 40-VFQFN Exposed Pad | 
| Supplier Device Package | 32-QFN (5x5) | 40-QFN (5x5) |