LM3478MAX/NOPB
Active2.97~40V WIDE INPUT RANGE BOOST/SEPIC/FLYBACK DC-DC CONTROLLER
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LM3478MAX/NOPB
Active2.97~40V WIDE INPUT RANGE BOOST/SEPIC/FLYBACK DC-DC CONTROLLER
Technical Specifications
Parameters and characteristics for this part
| Specification | LM3478MAX/NOPB |
|---|---|
| Clock Sync | False |
| Control Features | Frequency Control, Enable |
| Duty Cycle (Max) [Max] | 100 % |
| Frequency - Switching [Max] | 1 MHz |
| Frequency - Switching [Min] | 100 kHz |
| Function | Step-Up, Step-Up/Step-Down |
| Mounting Type | Surface Mount |
| Number of Outputs | 1 |
| Operating Temperature [Max] | 125 ¯C |
| Operating Temperature [Min] | -40 °C |
| Output Configuration | Positive |
| Output Phases | 1 |
| Output Type | Transistor Driver |
| Package / Case | 8-SOIC |
| Package / Case [x] | 0.154 in |
| Package / Case [y] | 3.9 mm |
| Supplier Device Package | 8-SOIC |
| Synchronous Rectifier | False |
| Topology | Flyback, SEPIC, Boost |
| Voltage - Supply (Vcc/Vdd) [Max] | 40 V |
| Voltage - Supply (Vcc/Vdd) [Min] | 2.97 V |
Pricing
Prices provided here are for design reference only. For realtime values and availability, please visit the distributors directly
| Distributor | Package | Quantity | $ | |
|---|---|---|---|---|
| Digikey | Cut Tape (CT) | 1 | $ 2.61 | |
| 10 | $ 2.35 | |||
| 25 | $ 2.21 | |||
| 100 | $ 1.88 | |||
| 250 | $ 1.77 | |||
| 500 | $ 1.55 | |||
| 1000 | $ 1.28 | |||
| Digi-Reel® | 1 | $ 2.61 | ||
| 10 | $ 2.35 | |||
| 25 | $ 2.21 | |||
| 100 | $ 1.88 | |||
| 250 | $ 1.77 | |||
| 500 | $ 1.55 | |||
| 1000 | $ 1.28 | |||
| Tape & Reel (TR) | 2500 | $ 1.19 | ||
| 5000 | $ 1.15 | |||
| Texas Instruments | LARGE T&R | 1 | $ 1.96 | |
| 100 | $ 1.62 | |||
| 250 | $ 1.16 | |||
| 1000 | $ 0.88 | |||
Description
General part information
LM3478Q-Q1 Series
The LM3478Q-Q1 is a versatile Low-Side N-Channel MOSFET controller for switching regulators. It is suitable for use in topologies requiring a low side MOSFET, such as boost, flyback, SEPIC, etc. Moreover, the LM3478Q-Q1 can be operated at extremely high switching frequency in order to reduce the overall solution size. The switching frequency of the LM3478Q-Q1 can be adjusted to any value between 100 kHz and 1 MHz by using a single external resistor. Current mode control provides superior bandwidth and transient response, besides cycle-by-cycle current limiting. Output current can be programmed with a single external resistor.
The LM3478Q-Q1 has built in features such as thermal shutdown, short-circuit protection, over voltage protection, etc. Power saving shutdown mode reduces the total supply current to 5 µA and allows power supply sequencing. Internal soft-start limits the inrush current at start-up.
The LM3478Q-Q1 is a versatile Low-Side N-Channel MOSFET controller for switching regulators. It is suitable for use in topologies requiring a low side MOSFET, such as boost, flyback, SEPIC, etc. Moreover, the LM3478Q-Q1 can be operated at extremely high switching frequency in order to reduce the overall solution size. The switching frequency of the LM3478Q-Q1 can be adjusted to any value between 100 kHz and 1 MHz by using a single external resistor. Current mode control provides superior bandwidth and transient response, besides cycle-by-cycle current limiting. Output current can be programmed with a single external resistor.
Documents
Technical documentation and resources
