Calculation tool
LM5122ZA
3-V to 65-V wide VIN, current mode synchronous boost controller with multiphase capability
Data sheet
LM5122ZA
- Maximum Input Voltage: 65 V
- Minimum Input Voltage: 3 V (4.5 V for Start-Up)
- Output Voltage up to 100 V
- Bypass (VOUT = VIN) 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 24-Pin HTSSOP
The LM5122ZA 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 N-channel MOSFET gate drivers with adaptive dead-time 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 multi-phase interleaved configuration. Additional features include thermal shutdown, frequency synchronization, hiccup-mode current limit, and adjustable line undervoltage lockout.
Technical documentation
No results found. Please clear your search and try again.
View all 3 | Type | Title | Date | ||
|---|---|---|---|---|
| * | Data sheet | LM5122ZA Wide-Input Synchronous Boost Controller With Multiple Phase Capability datasheet (Rev. A) | PDF | HTML | 07 Nov 2018 |
| White paper | An overview of radiated EMI specifications for power supplies | 05 Jun 2018 | ||
| White paper | An overview of conducted EMI specifications for power supplies | 01 Feb 2018 |
Design & development
For additional terms or required resources, click any title below to view the detail page where available.
Simulation model
LM5122 Dual-Phase TINA-TI Transient Reference Design
SNVMAV2.TSC (729 KB) - TINA-TI Reference Design
Simulation model
LM5122 TINA-TI Transient Reference Design (Rev. B)
SNVM495B.TSC (188 KB) - TINA-TI Reference Design
Simulation model
LM5122 TINA-TI Transient Spice Model (Rev. B)
SNVM494B.ZIP (52 KB) - TINA-TI Spice Model
Simulation model
LM5122 Unencrypted PSpice Average Model Package (Rev. A)
SNVMBC0A.ZIP (78 KB) - PSpice Model
| Package | Pins | CAD symbols, footprints & 3D models |
|---|---|---|
| HTSSOP (PWP) | 24 | Ultra Librarian |
Ordering & quality
Information included:
- RoHS
- REACH
- Device marking
- Lead finish/Ball material
- MSL rating/Peak reflow
- MTBF/FIT estimates
- Material content
- Qualification summary
- Ongoing reliability monitoring
Information included:
- Fab location
- Assembly location
Support & training
TI E2E™ forums with technical support from TI engineers
Content is provided "as is" by TI and community contributors and does not constitute TI specifications. See terms of use.
If you have questions about quality, packaging or ordering TI products, see TI support.