LM3478MM - NATIONAL SEMICONDUCTOR - HIGH EFFICIENCY LOW-SIDE
N-CHANNEL CONTROLLER FOR SWITCHING REGULATOR
Quick Detail:
High Efficiency Low-Side N-Channel Controller for Switching
Regulator
Description:
The LM3478 is a versatile Low-Side N-FET switching regulator
controller. It is suitable for use in topologies requiring
low side FET, such as boost, flyback, SEPIC, etc. Moreover,
the LM3478 can be operated at extremely high switching
frequency in order to reduce the overall solution size. The
switching frequency of LM3478 can be adjusted to any value
between 100kHz and 1MHz 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 LM3478 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
5μA and allows power supply sequencing. Internal soft-start
limits the inrush current at start-up.
Applications:
- Distributed Power Systems
- Battery Chargers
- Offline Power Supplies
- Telecom Power Supplies
- Automotive Power Systems
Specifications:
| Datasheets | LM3478 |
| Product Photos | 8-MSOP |
| Design Resources | Create your power design now with TI’s WEBENCH® Designer |
| Standard Package | 1 |
| Category | Integrated Circuits (ICs) |
| Family | PMIC - Voltage Regulators - DC DC Switching Controllers |
| Series | - |
| Packaging | Digi-Reel® |
| PWM Type | Current Mode |
| Number of Outputs | 1 |
| Frequency - Max | 1MHz |
| Duty Cycle | 100% |
| Voltage - Supply | 2.97 V ~ 40 V |
| Buck | No |
| Boost | Yes |
| Flyback | Yes |
| Inverting | No |
| Doubler | No |
| Divider | No |
| Cuk | No |
| Isolated | No |
| Operating Temperature | -40°C ~ 125°C |
| Package / Case | 8-TSSOP, 8-MSOP (0.118", 3.00mm Width) |
| For Use With | LM3478EVAL/NOPB-ND - EVAL BOARD FOR LM3478
LM3478EVAL-ND - BOARD EVALUATION LM3478 |
| Other Names | LM3478MM/NOPBDKR |
