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| Part Number | LTC4121IUD | 
| Description | IC POWER MANAGEMENT | 
| Manufacturer | Linear Technology/Analog Devices | 
| Series | - | 
| Part Status | Obsolete | 
| Battery Chemistry | Multi-Chemistry | 
| Number of Cells | - | 
| Current - Charging | Constant - Programmable | 
| Programmable Features | - | 
| Fault Protection | - | 
| Charge Current - Max | 400mA | 
| Battery Pack Voltage | 18V (Max) | 
| Voltage - Supply (Max) | 40V | 
| Interface | - | 
| Operating Temperature | -40°C ~ 125°C (TJ) | 
| Package / Case | Surface Mount | 
| Supplier Device Package | 16-WFQFN Exposed Pad | 
| Base Part Number | 16-QFN (3x3) |