LM5127-Q1
42V wide-Vin triple buck and boost controller for automotive applications
Data sheet
LM5127-Q1
- AEC-Q100 qualified for automotive applications
- Temperature grade 1: –40°C to +125°C, TA
- Functional Safety-Capable
- Suited for various architectures and scalable
- Triple-output synchronous controllers
- Flexible topology
- CH1: boost / buck topology
- CH2, CH3: two single phase bucks / dual-phase interleaved buck topology
- Enable pin and PGOOD indicator per channel
- Optional low IQ battery monitor
- Wide operating range for automotive applications
- 3.8-V to 42-V input operating range
- Minimum boost input 0.8 V when BIAS ≥ 3.8 V
- Boost output: adjustable up to 42 V
- Buck output: fixed 3.3 V, 5 V, or adj. 0.8 - 42 V
- Bypass operation when VSUPPLY>VLOAD (boost)
- LDO operation when VSUPPLY ≈ VLOAD (buck)
- Minimized battery drain
- Shutdown current ≤ 2.8 µA
- Automatic transition to low-IQ sleep mode
- Battery drain in sleep
- IQ≤ 14 µA when 3.3-V buck on
- IQ≤ 22 µA when 3.3-V and 5-V bucks on
- IQ≤ 32 µA when 3.3-V, 5-V bucks on and boost in bypass
- High efficiency using strong 5-V drivers
- Dual input VCC and VDD regulators
- Small and cost-effective solution
- Maximum switching frequency 2.2 MHz
- Internal boot diode (boost)
- Constant peak current limit
- Supports DCR inductor current sensing
- QFN-48 with wettable flanks
- Avoid AM band interference and crosstalk
- Optional clock synchronization
- Switching frequency from 100 kHz to 2.2 MHz
- Selectable switching mode (FPWM, diode emulation, and skip mode)
- EMI mitigation
- Optional programmable spread spectrum
- Programmability and flexibility
- Programmable wake-up and sleep threshold
- Dynamic switching frequency programming
- Adjustable soft start time
- Adjustable output using 0.8 V ±1% reference
- Adaptive dead-time control
- Integrated protection features
- Overcurrent protection
- Cycle-by-cycle peak current limit
- Optional hiccup mode protection (buck)
- Optional latch-off mode protection (buck)
- Overvoltage protection
- HB-SW short protection (boost)
- Thermal shutdown
- Overcurrent protection
The LM5127-Q1 is a full featured, wide input range three channel DC/DC controller which supports flexible topology (Boost/Buck) with peak current mode control. The device is designed as an integrated one-chip solution for the front-stage power supply in automotive infotainment, cluster, body control as well as ADAS systems. (continue on next page)
Technical documentation
No results found. Please clear your search and try again.
View all 4 | Type | Title | Date | ||
|---|---|---|---|---|
| * | Data sheet | LM5127-Q1 2.2-MHz Wide VIN Automotive Front-stage Multi-rail DC/DC datasheet (Rev. A) | PDF | HTML | 17 Dec 2020 |
| EVM User's guide | LM5127EVM-FLEX Evaluation Module (Rev. A) | PDF | HTML | 16 Dec 2020 | |
| Functional safety information | LM5127-Q1 Functional Safety, FIT Rate and Failure Mode Distribution | PDF | HTML | 11 Dec 2020 | |
| Certificate | LM5127EVM-FLEX EU RoHS Declaration of Conformity (DoC) (Rev. A) | 25 Nov 2020 |
Design & development
For additional terms or required resources, click any title below to view the detail page where available.
Evaluation board
LM5127EVM-FLEX — LM5127 Flexible topology evaluation Module
The LM5127EVM-FLEX showcases the features and performance of the LM5127-Q1 when configured with channel 1 as a pre-boost, and channel 2 and channel 3 configured as independent buck controllers. The input voltage range is 3V to 42V. The pre-boost can operate down to 3V during input transients, (...)
Reference designs
PMP23194 — Three-output reference design for automotive ADAS including power for main processor and cameras
This reference design provides power for automotive Advanced Driver-Assistance Systems (ADAS) to power cameras (8 V), Controller Area Network (CAN) communications (5 V) and main processor (3.3 V). Operation is over the full automotive range including battery voltage surges to 34 V and dips to 6 V (...)
Test report: PDF
| Package | Pins | CAD symbols, footprints & 3D models |
|---|---|---|
| VQFN (RGZ) | 48 | 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
Recommended products may have parameters, evaluation modules or reference designs related to this TI product.
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.