My Inquiry
My Account
Texas Instruments LM5158QRTERQ1
- Part No.:
- LM5158QRTERQ1
- Manufacturer:
- Texas Instruments
- Package:
- 16-WFQFN Exposed Pad
- Datasheet:
-
LM5158QRTERQ1.pdf
- Description:
- IC REG BOOST FLYBACK ADJ 16WQFN
- Quantity:
- Payment:
- Shipping:
Inventory:6,586
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LM5158QRTERQ1 from Texas Instruments is an AEC-Q100 Grade 1 automotive-qualified, non-synchronous boost/SEPIC/flyback controller with integrated 85-V, 3.26-A power MOSFET, 2.2-MHz programmable switching frequency, ±1% feedback reference, and dual random spread spectrum for EMI reduction. It operates from 3.2 V to 60 V input (65-V abs max), delivers up to 83-V output (85-V abs max), and supports primary-side regulation in flyback without optocoupler - ideal for automotive LED bias and LiDAR power supplies.
For engineers reviewing the LM5158QRTERQ1 datasheet, LM5158QRTERQ1 pinout, LM5158QRTERQ1 application, or LM5158QRTERQ1 equivalent, this page provides verified technical context, validated pin functions, confirmed automotive-grade protection features (hiccup mode, OVP, thermal shutdown), real-world topology support (boost/SEPIC/flyback), and precise selection guidance against comparable wide-VIN controllers.
Technical Context
The LM5158QRTERQ1 implements peak-current-mode control with dynamically programmable switching frequency (100 kHz–2.2 MHz via RT resistor), enabling AM-band avoidance and compact magnetics. Its integrated 133-mΩ 85-V MOSFET and accurate current limit (3.26 A typ) support high-efficiency operation across wide input ranges.
It features dual-level EN/UVLO/SYNC pin functionality, selectable hiccup-mode overload protection, and a precision 1-V internal reference with ±1% tolerance over –40°C to +125°C. The BIAS pin supports up to 60-V operation (65-V abs max) for load-dump resilience, while PGOOD and soft-start (SS) enable robust system sequencing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3.2 V to 60 V (65-V abs max); enables direct connection to automotive battery with transient immunity. |
| Output Voltage Capability | Up to 83 V (85-V abs max SW voltage); supports high-voltage LiDAR and LED bias rails. |
| Switching Frequency | 100 kHz to 2.2 MHz (programmable via RT); allows AM-band avoidance and <3 mm × 3 mm solution size. |
| Peak Current Limit | 3.26 A (typ); ensures consistent overcurrent protection across input voltage range without inductor overdesign. |
| Feedback Reference | 1.0 V ±1% (–40°C to +125°C); enables precise output regulation in boost/SEPIC/flyback topologies. |
| Shutdown Current | ≤2.6 µA at 12 V BIAS; minimizes battery drain in always-on automotive systems. |
| Operating Current | ≤670 µA at 12 V BIAS; improves light-load efficiency via pulse-skipping mode. |
| rDS(ON) | 133 mΩ at VBIAS = 12 V; reduces conduction loss and thermal stress in high-power boost stages. |
Pinout & Package
LM5158QRTERQ1 is housed in a 16-pin WQFN package (3.00 mm × 3.00 mm) with wettable flanks and exposed thermal pad (EP) connected to AGND.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 16 PGND | Power ground | Source connection of internal N-channel MOSFET; must be low-inductance path to minimize switching noise. |
| 2 VCC | VCC regulator output | Supplies internal circuitry and gate driver; requires 1-µF ceramic bypass to PGND. |
| 3 BIAS | VCC regulator input | Wide-range supply input (3.2–60 V); enables operation during cold-crank and load-dump events. |
| 4 PGOOD | Power-good indicator | Open-drain output signaling valid output regulation; requires external pull-up for system sequencing. |
| 5 RT | Frequency setting | Resistor-to-AGND sets fSW from 100 kHz to 2.2 MHz; enables layout-optimized EMI tuning. |
| 6 EN/UVLO/SYNC | Enable/UVLO/sync input | Triple-function pin: start-up control, programmable UVLO threshold (1.5 V typ), or external clock sync. |
| 7 AGND | Analog ground | Reference for FB, COMP, SS; must connect via short, wide trace to minimize noise coupling. |
| 8 COMP | Error amplifier output | Connects loop compensation network; transconductance = 2 mA/V for stable Type II/III compensation. |
| 9 FB | Feedback input | Inverting input of error amp; connects to voltage divider for output regulation in all supported topologies. |
| 10 SS | Soft-start control | Capacitor-to-AGND sets ramp rate of internal reference; prevents inrush current and overshoot. |
| 11 MODE | Protection/spread-spectrum select | Resistor-to-AGND configures hiccup mode (enabled/disabled) and dual random spread spectrum (on/off). |
| 13, 14 SW | Switch node | Drain of internal 85-V MOSFET; carries high di/dt; requires tight layout and Kelvin connection to PGND. |
| 12, 15 NC | No connect | No internal electrical connection; must remain unconnected per datasheet. |
| EP | Exposed thermal pad | Must be soldered to large AGND copper plane for thermal resistance ≤6.7°C/W (bottom junction-to-case). |
Key Features
| Feature | Design Value |
|---|---|
| Automotive qualification | AEC-Q100 Grade 1 (–40°C to +125°C TA); qualified for safety-critical vehicle subsystems. |
| Dual random spread spectrum | Selectable EMI reduction technique spreading energy across wide bandwidth; lowers peak emissions without filtering. |
| Primary-side regulation (flyback) | Integrated error amplifier eliminates optocoupler need; simplifies isolated design and improves reliability. |
| Programmable hiccup-mode protection | 64-cycle overload timer with 8-cycle reset; limits average power during sustained overloads without latch-off. |
| Accurate line UVLO | 1.5 V rising threshold with 50-mV hysteresis and 5-μA current source; prevents erratic startup during cranking. |
| Low-power cranking support | Operates down to 1.5 V input when BIAS ≥ 3.2 V; maintains function during automotive cold-crank events. |
Applications
| Automotive LED Bias Supply | High-Voltage LiDAR Power Supply |
|---|---|
|
Use Scenario: Driving high-brightness LEDs in headlamps or DRLs from 12-V battery with variable load and temperature. IC Role / Device Role / Timing Role: Non-synchronous boost controller regulating constant current via FB-sensed shunt voltage; handles input dips to 1.5 V during cranking. Use Value: Eliminates external optocoupler in buck-boost LED drivers; ±1% reference ensures stable luminance across –40°C to +125°C. |
Use Scenario: Generating 60–80 V bias for avalanche photodiode (APD) arrays in automotive LiDAR modules. IC Role / Device Role / Timing Role: High-voltage SEPIC converter delivering regulated output with fast transient response (<10 µs) enabled by 2.2-MHz switching. Use Value: Dual random spread spectrum reduces radiated emissions near sensitive RF receivers; 85-V switch withstands LiDAR pulse transients. |
| Automotive Voltage Stabilizer (SEPIC) | Piezo Driver/Motor Driver Bias Supply |
|
Use Scenario: Maintaining stable 5-V or 12-V rail for infotainment or ADAS ECUs during battery voltage sag (4.5 V) or surge (24 V). IC Role / Device Role / Timing Role: SEPIC topology controller providing non-inverting regulation with continuous input-to-output path; uses MODE pin to enable hiccup protection. Use Value: Input range (3.2–60 V) covers full automotive transient profile; 133-mΩ rDS(ON) minimizes dropout and heat rise at 2-A load. |
Use Scenario: Supplying 40–70 V gate bias for piezoelectric actuators or stepper motor drivers in HVAC or chassis control. IC Role / Device Role / Timing Role: Flyback controller with primary-side regulation generating isolated high-voltage bias; BIAS pin powered from auxiliary winding. Use Value: Eliminates optocoupler and secondary-side LDO; BIAS ≥3.2 V enables operation even when main input drops below 3.2 V. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar wide-input boost/SEPIC/flyback controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM5157QRTERQ1 | Lower maximum switch voltage (65 V vs. 85 V); same 3.26-A current limit and 2.2-MHz capability. | Not suitable for >65-V output applications like LiDAR or high-string LED; otherwise matches in footprint and feature set. | Select LM5157QRTERQ1 only if output ≤65 V and cost sensitivity outweighs voltage margin needs. |
| LM5165QRTERQ1 | Synchronous buck-only (not boost/SEPIC/flyback); 65-V input, 500-mA output; no integrated high-side switch. | Cannot replace LM5158QRTERQ1 in boost-derived topologies; limited to step-down conversion with lower power. | Use LM5165QRTERQ1 only for low-power buck regulation where topology and voltage requirements align. |
Compared with LM5157QRTERQ1 and LM5165QRTERQ1, LM5158QRTERQ1 uniquely supports 85-V output in boost/SEPIC/flyback with integrated 3.26-A switch and primary-side regulation - making it the sole option for automotive high-voltage isolated or non-isolated DC/DC where voltage headroom and topology flexibility are critical.
Availability
LM5158QRTERQ1 is available at Aetrix Electronics and suitable for automotive LED bias, LiDAR power supplies, and voltage stabilizers requiring stable component supply across extended temperature and high-reliability production cycles.
Supply support for LM5158QRTERQ1 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Texas Instruments is a global semiconductor leader specializing in analog, embedded processing, and automotive-grade power management ICs with decades of AEC-Q100 validation expertise.
The LM5158x-Q1 product line was designed specifically for automotive power conversion in harsh environments - supporting boost, SEPIC, and flyback topologies with integrated high-voltage switches, spread-spectrum EMI control, and functional safety documentation.
FAQ
What is the absolute maximum voltage rating on the SW pin of the LM5158QRTERQ1?
The SW pin of the LM5158QRTERQ1 has an absolute maximum voltage rating of 85 V for DC conditions and 85 V for 5-ns transients. This rating enables reliable operation in high-output boost and flyback designs such as automotive LiDAR bias supplies, where transient spikes must be contained within safe operating area limits. Exceeding 85 V risks permanent damage to the integrated 85-V MOSFET.
Does the LM5158QRTERQ1 support primary-side regulation in flyback without an optocoupler?
Yes, the LM5158QRTERQ1 supports primary-side regulation (PSR) in flyback topology using its integrated transconductance error amplifier and accurate 1.0-V ±1% reference. By sensing reflected output voltage on the FB pin through a transformer turns-ratio-adjusted divider, it eliminates the need for an optocoupler and secondary-side TL431, reducing bill-of-materials cost and improving long-term reliability in automotive isolation applications.
How does the MODE pin configure hiccup-mode protection and spread spectrum on the LM5158QRTERQ1?
The MODE pin of the LM5158QRTERQ1 selects operating modes via resistor-to-AGND: 37.4 kΩ enables both hiccup-mode protection and dual random spread spectrum; 62.0 kΩ enables hiccup mode only; 100 kΩ enables spread spectrum only; and grounding disables both. This configuration occurs at initial power-up and remains latched, allowing deterministic EMI and fault-handling behavior without runtime reconfiguration.
What is the minimum input voltage the LM5158QRTERQ1 can operate from, and under what conditions?
The LM5158QRTERQ1 can operate from a minimum input voltage of 1.5 V when the BIAS pin is supplied ≥3.2 V - enabling functionality during severe automotive cold-crank events where battery voltage collapses below 4 V. This capability relies on the internal VCC regulator being powered externally, not from VSUPPLY, and is validated across –40°C to +125°C ambient temperature.
Is the LM5158QRTERQ1 pin-compatible with other devices in the LM5158x-Q1 family?
No, the LM5158QRTERQ1 is not pin-compatible with LM51581QRTERQ1 despite identical package and pinout - because the LM51581-Q1 variant integrates a 1.63-A (not 3.26-A) MOSFET with different current-limit calibration. Swapping them without redesigning current-sense and thermal layout risks overcurrent failure or inadequate power delivery. Always verify device-specific current limit and rDS(ON) values before substitution.
LM5158QRTERQ1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 16-WFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Step-Up, Step-Up/Step-Down
- Output Configuration:
- Positive
- Topology:
- Boost, Flyback, SEPIC
- Output Type:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 1.5V
- Voltage - Input (Max):
- 60V
- Voltage - Output (Min/Fixed):
- 1.5V
- Voltage - Output (Max):
- 83V
- Current - Output:
- 3.26A (Switch)
- Frequency - Switching:
- 100kHz ~ 2.2MHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-WQFN (3x3)
LM5158QRTERQ1 FAQ
1.How can I place an order for LM5158QRTERQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM5158QRTERQ1 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for LM5158QRTERQ1 reliable?
The price and inventory of LM5158QRTERQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM5158QRTERQ1 is usually 5 days.
3.What payment methods are accepted for LM5158QRTERQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM5158QRTERQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM5158QRTERQ1?
LM5158QRTERQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM5158QRTERQ1 order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for LM5158QRTERQ1?
For technical support, including LM5158QRTERQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM5158QRTERQ1 requirements.
6.How does Aetrix verify that LM5158QRTERQ1 is sourced from the original manufacturer or authorized distributors?
All LM5158QRTERQ1 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that LM5158QRTERQ1 meets industry standards.
7.What is the process for return or replacement of LM5158QRTERQ1?
All LM5158QRTERQ1 units undergo pre-shipment inspection (PSI). If there is an issue with LM5158QRTERQ1, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The LM5158QRTERQ1 part is unused and in its original packaging.
Return procedure for LM5158QRTERQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM5158QRTERQ1 Tags
-
TPS562201DDCR
Texas Instruments
-
MC34063ABD-TR
STMicroelectronics
-
TPS561201DDCR
Texas Instruments
-
MC33063ADR
Texas Instruments
-
MC34063ADR
Texas Instruments
-
TPS560200DBVR
Texas Instruments
-
AP3012KTR-G1
Diodes Incorporated
-
TLV61048DBVR
Texas Instruments
-
AZ34063UMTR-G1
Diodes Incorporated
-
TPS562200DDCR
Texas Instruments
-
AP62300TWU-7
Diodes Incorporated
-
MC34063EBD-TR
STMicroelectronics
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
