XLM5157QRTERQ1 Texas Instruments Integrated Circuit (Quad Flat No-Lead) In Stock
The XLM5157QRTERQ1 is an automotive-grade 6 A, 1.5–45 V input, 2.2 MHz boost/flyback/SEPIC controller with dual random spread spectrum and current-mode PWM control in a QFN-16 package. Designed for harsh automotive and industrial power environments.
- Manufacturer
- Texas Instruments
- Package
- Quad Flat No-Lead
- Pin Count
- 17
- Lifecycle
- OBSOLETE
- Datasheet
- XLM5157QRTERQ1 Datasheet PDF
- Category
- Integrated Circuit
- Temp Range
- -40.0°C to 150.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- Wide 1.5 V to 45 V input range with 6 A switch current rating supports boost, flyback, and SEPIC topologies from a single automotive-qualified IC
- 2.2 MHz switching frequency with dual random spread spectrum reduces conducted EMI, helping designs pass CISPR 25 automotive radiated emission limits
- Current-mode PWM control with fast transient response and automotive AEC-Q100 qualification suit under-hood and 48 V mild-hybrid power rail applications
Applications
The XLM5157QRTERQ1 is designed for automotive power modules such as LED headlight drivers, instrument-cluster rail converters, and infotainment supply stages where a single controller must handle 12 V or 24 V battery inputs that swing from 1.5 V cold-crank to 45 V load-dump transients. It is also used in industrial DC-DC converters, telecom isolated flyback regulators, and SEPIC-based battery chargers where wide input range, 2.2 MHz high-frequency operation, and EMI spread-spectrum dithering are required to meet system-level EMC standards.
Specifications
| Date Of Intro | 2020-11-14 |
| YTEOL | 0 |
| Analog IC - Other Type | SWITCHING REGULATOR |
| Control Mode | CURRENT-MODE |
| Control Technique | PULSE WIDTH MODULATION |
| Input Voltage-Max | 45V |
| Input Voltage-Min | 1.5V |
| Input Voltage-Nom | 3V |
| JESD-30 Code | S-PQCC-N16 |
| Number of Functions | 1 |
| Number of Outputs | 1 |
| Output Current-Max | 6.5A |
| Output Voltage-Max | 48V |
| Output Voltage-Min | 1.5V |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | LCC16,.12SQ,20 |
| Package Shape | SQUARE |
| Package Style | CHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE |
| Screening Level | AEC-Q100 |
| Supply Current-Max (Isup) | 0.775mA |
| Surface Mount | YES |
| Switcher Configuration | BUCK-BOOST |
| Switching Frequency-Max | 2200kHz |
| Technology | BICMOS |
| Temperature Grade | AUTOMOTIVE |
| Terminal Form | NO LEAD |
| Terminal Pitch | 0.5mm |
| Terminal Position | QUAD |
| Package | Quad Flat No-Lead |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| ECCN | EAR99 |
| HTS Code | 8542.39.00.01 |
Alternate & Equivalent Parts
Compatible alternatives and drop-in replacements for XLM5157QRTERQ1:
Switching Regulator, Current-mode, 8.5A, 2200kHz Switching Freq-Max, BICMOS, PQCC16
Switching Regulator, Current-mode, 7.5A, 2200kHz Switching Freq-Max, BICMOS, PQCC16
Frequently Asked Questions
What switching topologies can the XLM5157QRTERQ1 controller support in a power supply design?
The XLM5157QRTERQ1 supports boost, flyback, and SEPIC converter topologies using the same IC. This flexibility allows engineers to use a single part number across multiple product variants: a boost stage for LED backlights, an isolated flyback for galvanic-isolation requirements, and a SEPIC for applications where the output voltage must be above or below the input voltage ranging from 1.5 V to 45 V.
How does the dual random spread spectrum feature of the XLM5157QRTERQ1 benefit automotive EMC compliance?
By randomly dithering the 2.2 MHz switching frequency around its nominal value, the dual random spread spectrum function spreads the spectral energy of the switching harmonics across a wider frequency band rather than concentrating it at discrete tones. This technique reduces peak radiated and conducted emissions by typically 10–15 dBµV, making it significantly easier to pass CISPR 25 Class 5 automotive limits for AM-radio-band interference without adding large EMI filter inductors and capacitors.
What input voltage range does the XLM5157QRTERQ1 handle, and which automotive bus conditions does this cover?
The controller accepts input voltages from 1.5 V minimum to 45 V maximum, covering the full range of a 12 V automotive battery system from cold-crank start (as low as 6 V) through normal 14 V alternator charging up to ISO 7637 load-dump transients reaching 40 V. The 45 V absolute maximum also accommodates 24 V truck systems and 48 V mild-hybrid bus voltages after an appropriate divider or pre-regulation stage.
For a 12 V automotive headlight LED driver, what switch current does the XLM5157QRTERQ1 provide, and how is it set?
The integrated switch supports up to 6 A peak switch current, programmable via an external current-sense resistor placed in the switch current path. For a boost topology driving a string of 10 W LEDs from a 12 V rail to a 40 V LED string, a typical inductor peak current of 3–4 A can be configured by selecting a sense resistor value in the range of 50–100 mΩ, giving a comfortable margin below the 6 A maximum while keeping conduction losses low.
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Texas Instruments (TI) is a global semiconductor company headquartered in Dallas, Texas. TI designs and manufactures analog and embedded processing chips used in industrial, automotive, consumer, communications, and enterprise systems.
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