42V wide-Vin triple buck and boost controller for automotive applications
Product details
Parameters
Package | Pins | Size
Features
- 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
All trademarks are the property of their respective owners.
Description
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
= Top documentation for this product selected by TI
Type | Title | Date | |
---|---|---|---|
* | Datasheet | LM5127-Q1 2.2-MHz Wide VIN Automotive Front-stage Multi-rail DC/DC datasheet (Rev. A) | Dec. 17, 2020 |
User guide | LM5127EVM-FLEX Evaluation Module (Rev. A) | Dec. 16, 2020 | |
Functional safety information | LM5127-Q1 Functional Safety, FIT Rate and Failure Mode Distribution | Dec. 11, 2020 | |
More literature | LM5127EVM-FLEX EU RoHS Declaration of Conformity (DoC) (Rev. A) | Nov. 25, 2020 |
Design & development
For additional terms or required resources, click any title below to view the detail page where available.Hardware development
LM5127EVM-FLEX
Description
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 (...)
Features
- Input voltage range: 3V to 42V
- One pre-boost controller
- Two buck controllers (5V at 5A), (3.3V at 7A)
- Hiccup mode short circuit protection
Design tools & simulation
SLVMD93.ZIP (65 KB) - PSpice Model
SLVMD94.ZIP (69 KB) - PSpice Model
SLVMD95.ZIP (62 KB) - PSpice Model
SLVMD96.ZIP (114 KB) - PSpice Model
SLVMD97.ZIP (132 KB) - PSpice Model
SLVMD98.ZIP (156 KB) - PSpice Model
SLVRBH2.ZIP (7463 KB)
CAD/CAE symbols
Package | Pins | Download |
---|---|---|
VQFN (RGZ) | 48 | View options |
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
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.