LM5122MHX/NOPB
Power Management
Technical Specifications
| Type | Description |
|---|---|
| Output Type | Adjustable |
| Output Voltage | 100 V |
| Function | Boost |
| Switching Freq Hz | 662.5 kHz |
| Channels | 1 |
| Quiescent Current | 9 µA |
| Synchronous Rectifier | Yes |
| Type | Description |
|---|---|
| Switch Tube (built-in/external) | External |
| Features | Adjustable current limiting;Cycle-by-cycle current limiting;Hiccup current limiting;Adjustable soft-start;Frequency synchronization;Light load efficient mode;Overcurrent Protection |
| Topology | Boost |
| Supply Voltage | 4.5V~65V |
| Operating Temperature | -40°C~+125°C@(TJ) |
| Output Current | - |
| Package / Case | HTSSOP-20-EP |
Product Introduction
The LM5122 is a multi-phase capable synchronous boost controller intended for high-efficiency synchronous boost regulator applications. The control method is based upon peak-current-mode control. Current-mode control provides inherent line feed forward, cycle-by-cycle current limiting, and ease of loop compensation.
The switching frequency is programmable up to 1 MHz. Higher efficiency is achieved by two robust Nchannel MOSFET gate drivers with adaptive deadtime control. A user-selectable diode-emulation mode also enables discontinuous-mode operation for improved efficiency at light load conditions.
An internal charge pump allows 100% duty cycle for high-side synchronous switch (bypass operation). A 180° phase shifted clock output enables easy multiphase interleaved configuration. Additional features include thermal shutdown, frequency synchronization, hiccup-mode current limit, and adjustable line undervoltage lockout.
Features
- Maximum Input Voltage: 65 V
- Minimum Input Voltage: 3 V (4.5 V for Start-Up)
- Output Voltage up to 100 V
- Bypass (V_OUT = V_IN) Operation
- 1.2-V Reference with ±1% Accuracy
- Free-Run and Synchronizable Switching to 1 MHz
- Peak-Current-Mode Control
- Robust 3-A Integrated Gate Drivers
- Adaptive Dead-Time Control
- Optional Diode-Emulation Mode
- Programmable Cycle-by-Cycle Current Limit
- Hiccup-Mode Overload Protection
- Programmable Line UVLO
- Programmable Soft Start
- Thermal Shutdown Protection
- Low Shutdown Quiescent Current: 9 μA
- Programmable Slope Compensation
- Programmable Skip-Cycle Mode Reduces Standby Power
- Allows External VCC Supply
- Inductor DCR Current Sensing Capability
- Multi-phase Capability
- Thermally Enhanced 20 or 24-Pin HTSSOP
- Create a Custom Design Using the LM5122 With the WEBENCH Power Designer
Applications
- 12-V, 24-V, and 48-V Power Systems
- Automotive Start-Stop
- Audio Power Supply
- High-Current Boost Power Supply
Datasheet
Compliance & Export Codes
| Type | Details |
|---|---|
| RoHS | ROHS3 |
| ECCN | EAR99 |
| CNHTS | 8542399000 |
| USHTS | 8542390001 |
| TARIC | 8542399000 |
| Type | Details |
|---|---|
| CAHTS | 8542390000 |
| BRHTS | 85423999 |
| INHTS | 85423900 |
| MXHTS | 8542.39.99 |
Sourcing Information
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