LTC3838IUHF#PBF
ActiveDUAL, FAST, ACCURATE STEP- DOWN DC/DC CONTROLLER WITH DIFFERENTIAL OUTPUT SENSING
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LTC3838IUHF#PBF
ActiveDUAL, FAST, ACCURATE STEP- DOWN DC/DC CONTROLLER WITH DIFFERENTIAL OUTPUT SENSING
Deep-Dive with AI
Technical Specifications
Parameters and characteristics for this part
| Specification | LTC3838IUHF#PBF |
|---|---|
| Clock Sync | False |
| Control Features | Soft Start, Enable, Power Good, Tracking, Frequency Control, Phase Control |
| Frequency - Switching [Max] | 2 MHz |
| Frequency - Switching [Min] | 200 kHz |
| Function | Step-Down |
| Mounting Type | Surface Mount |
| Number of Outputs | 2 |
| Operating Temperature [Max] | 125 °C |
| Operating Temperature [Min] | -40 C |
| Output Configuration | Positive |
| Output Phases | 2 |
| Output Type | Transistor Driver |
| Package / Case | 38-WFQFN Exposed Pad |
| Supplier Device Package | 38-QFN (5x7) |
| Synchronous Rectifier | True |
| Topology | Buck |
| Voltage - Supply (Vcc/Vdd) [Max] | 38 V |
| Voltage - Supply (Vcc/Vdd) [Min] | 4.5 V |
LTC3838 Series
Dual, Fast, Accurate Step- Down DC/DC Controller with Differential Output Sensing
| Part | Number of Outputs | Control Features | Frequency - Switching [Min] | Frequency - Switching [Max] | Output Type | Clock Sync | Function | Package / Case | Topology | Output Configuration | Operating Temperature [Min] | Operating Temperature [Max] | Voltage - Supply (Vcc/Vdd) [Min] | Voltage - Supply (Vcc/Vdd) [Max] | Output Phases | Supplier Device Package | Mounting Type | Synchronous Rectifier | Package / Case |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
 Analog Devices Inc./Maxim Integrated | 2 | Enable Frequency Control Phase Control Power Good Soft Start Tracking | 200 kHz | 2 MHz | Transistor Driver | Step-Down | 38-WFQFN Exposed Pad | Buck | Positive | -40 C | 125 °C | 4.5 V | 38 V | 2 | 38-QFN (5x7) | Surface Mount | |||
Analog Devices Inc./Maxim Integrated | 2 | Enable Frequency Control Phase Control Power Good Soft Start Tracking | 200 kHz | 2 MHz | Transistor Driver | Step-Down | 38-WFQFN Exposed Pad | Buck | Positive | -40 C | 125 °C | 4.5 V | 38 V | 2 | 38-QFN (5x7) | Surface Mount | |||
 Analog Devices Inc./Maxim Integrated | 2 | Enable Frequency Control Phase Control Power Good Soft Start Tracking | 200 kHz | 2 MHz | Transistor Driver | Step-Down | 38-TFSOP Exposed Pad | Buck | Positive | -40 C | 125 °C | 4.5 V | 38 V | 2 | 38-TSSOP-EP | Surface Mount | 0.173 " 4.4 mm | ||
Analog Devices Inc./Maxim Integrated | 2 | Enable Frequency Control Phase Control Power Good Soft Start Tracking | 200 kHz | 2 MHz | Transistor Driver | Step-Down | 38-WFQFN Exposed Pad | Buck | Positive | -40 C | 125 °C | 4.5 V | 38 V | 2 | 38-QFN (5x7) | Surface Mount | |||
Analog Devices Inc./Maxim Integrated | 2 | Enable Frequency Control Phase Control Power Good Soft Start Tracking | 200 kHz | 2 MHz | Transistor Driver | Step-Down | 38-WFQFN Exposed Pad | Buck | Positive | -40 C | 125 °C | 4.5 V | 38 V | 2 | 38-QFN (5x7) | Surface Mount | |||
Analog Devices Inc./Maxim Integrated | 2 | Enable Frequency Control Phase Control Power Good Soft Start Tracking | 200 kHz | 2 MHz | Transistor Driver | Step-Down | 38-TFSOP Exposed Pad | Buck | Positive | -40 C | 125 °C | 4.5 V | 38 V | 2 | 38-TSSOP-EP | Surface Mount | 0.173 " 4.4 mm | ||
 Analog Devices Inc./Maxim Integrated | 2 | Enable Frequency Control Phase Control Power Good Soft Start Tracking | 200 kHz | 2 MHz | Transistor Driver | Step-Down | 38-TFSOP Exposed Pad | Buck | Positive | -40 C | 125 °C | 4.5 V | 38 V | 2 | 38-TSSOP-EP | Surface Mount | 0.173 " 4.4 mm | ||
Analog Devices Inc./Maxim Integrated | 2 | Enable Frequency Control Phase Control Power Good Soft Start Tracking | 200 kHz | 2 MHz | Transistor Driver | Step-Down | 38-WFQFN Exposed Pad | Buck | Positive | -40 C | 125 °C | 4.5 V | 38 V | 2 | 38-QFN (5x7) | Surface Mount | |||
 Analog Devices Inc./Maxim Integrated | 2 | Enable Frequency Control Phase Control Power Good Soft Start Tracking | 200 kHz | 2 MHz | Transistor Driver | Step-Down | 38-TFSOP Exposed Pad | Buck | Positive | -40 C | 125 °C | 4.5 V | 38 V | 2 | 38-TSSOP-EP | Surface Mount | 0.173 " 4.4 mm | ||
Analog Devices Inc./Maxim Integrated | 2 | Enable Frequency Control Phase Control Power Good Soft Start Tracking | 200 kHz | 2 MHz | Transistor Driver | Step-Down | 38-TFSOP Exposed Pad | Buck | Positive | -40 C | 125 °C | 4.5 V | 38 V | 2 | 38-TSSOP-EP | Surface Mount | 0.173 " 4.4 mm |
Pricing
Prices provided here are for design reference only. For realtime values and availability, please visit the distributors directly
| Distributor | Package | Quantity | $ | Updated |
|---|---|---|---|---|
| Digikey | N/A | 0 | $ 5.26 | 1m+ |
| Tube | 104 | $ 7.03 | 1m+ | |
Description
General part information
LTC3838 Series
The LTC3838-2 is a dual-channel, PolyPhase®synchronous step-down DC/DC switching regulator controller. Two independent channels drive all N-channel power MOSFETs. The two channels can also be combined into a multiphase single output configuration with external reference.The controlled on-time, valley current mode control architecture allows for not only fast response to transients without a clock delay, but also constant frequency switching at a steady-load condition. Its proprietary load-release transient detection feature (DTR) significantly reduces overshoot at low output voltages.The switching frequency can be programmed from 200kHz to 2MHz with an external resistor, and can be synchronized to an external clock. Very low tONand tOFFtimes allow for near 0% and near 100% duty cycles, respectively. Voltage tracking soft start-up and multiple safety features are provided.See below for a comparison of LTC3838, LTC3838-1 and LTC3838-2.Part NumberDescriptionLTC3838±0.67% Differential Output Voltage Accuracy Over Temperature on Channel 1, ±1% Output Regulation on Channel 2, Separate Per Channel 30mV to 100mV Current Sense Range ControlsLTC3838-1±0.67% Differential Output Voltage Accuracy Over Temperature on Both Channel 1 and Channel 2, Single Pin 30mV/60mV Current Sense Range ControlsLTC3838-2±0.67% Differential Output Voltage Accuracy With Internal Reference on Channel 1, ±4mV Differential with External Reference Voltage on Channel 2, Fixed 30mV Current Sense RangeApplicationsPower for ASICs with Dynamic Voltage ScalingLow Voltage, High Current, High Step-Down Ratio Converters That Demand Tight Transient Regulation
Documents
Technical documentation and resources