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Texas Instruments LM5575Q0MHX/NOPB
- Part No.:
- LM5575Q0MHX/NOPB
- Manufacturer:
- Texas Instruments
- Package:
- 16-PowerTSSOP (0.173", 4.40mm Width)
- Datasheet:
-
LM5575Q0MHX/NOPB.pdf
- Description:
- IC REG BUCK ADJ 1.5A 16HTSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,497
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Product details
Overview
LM5575Q0MHX/NOPB from Texas Instruments is an AEC-Q100 Grade 1 automotive-grade synchronous step-down DC/DC controller with integrated 75V/330mΩ N-channel MOSFET, delivering 1.5A continuous output current across 6V–75V input range and supporting adjustable output as low as 1.225V. It employs emulated current-mode control for stable regulation in high-input-voltage automotive power systems such as infotainment head units and ADAS domain controllers.
For engineers reviewing the LM5575Q0MHX/NOPB datasheet, LM5575Q0MHX/NOPB pinout, LM5575Q0MHX/NOPB application, or LM5575Q0MHX/NOPB equivalent, key selection criteria include its 50kHz–500kHz programmable switching frequency, ±1.65% feedback reference accuracy, cycle-by-cycle current limiting, thermal shutdown at 165°C, and HTSSOP-16 package with exposed thermal pad for automotive under-hood thermal management.
Technical Context
The LM5575Q0MHX/NOPB implements emulated current-mode control using a voltage-controlled ramp generator (IRAMP = (10 µA × (VIN – VOUT)) + 50 µA) and diode-current-based sample-and-hold DC level sensing via the IS pin - eliminating leading-edge spikes and enabling reliable sub-100ns minimum on-time operation. Its dual-mode VCC regulator tracks VIN up to 9V then regulates to 7V, supporting direct connection to 12V/24V/48V automotive buses.
Functional integration includes SYNC pin for master-slave synchronization of multiple regulators, BST/PGND-referenced bootstrap gate drive, PRE-assisted boot capacitor charging, and soft-start controlled by external capacitor on SS pin with 10µA internal current source. Protection features are fully autonomous: cycle-by-cycle current limit (2.1A typ), thermal shutdown (165°C), and remote shutdown via SD pin with 0.7V/1.225V thresholds.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 6V to 75V - supports direct connection to automotive battery rails including cold-crank (6V) and load-dump (75V) transients. |
| Output Current | 1.5A continuous - sufficient for powering microcontrollers, sensors, and interface ICs in automotive ECUs without external MOSFETs. |
| Feedback Reference | 1.225V ±1.65% - enables precise output regulation down to 1.225V with minimal external resistor tolerance impact. |
| Switching Frequency | 50kHz to 500kHz - set by single RT resistor; allows trade-off between inductor size (higher fSW → smaller L) and efficiency (lower fSW → lower switching loss). |
| Junction Temp Range | −40°C to +125°C - qualified per AEC-Q100 Grade 1 for under-hood and cabin-mounted automotive applications. |
| Thermal Resistance | RθJC(bot) = 1.5°C/W - low bottom-side junction-to-case resistance enables effective heat transfer to PCB ground plane via exposed pad. |
| Current Limit Threshold | 2.1A typical - cycle-by-cycle protection prevents MOSFET failure during short-circuit or overload events. |
Pinout & Package
LM5575Q0MHX/NOPB uses a 16-pin HTSSOP (PWP) package with 5mm × 4.4mm footprint and exposed thermal pad (EP) for enhanced thermal dissipation. The package is RoHS-compliant and designed for reflow soldering in automotive production environments.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | High-voltage input supply | Accepts 6V–75V unregulated input; powers internal bias regulator and buck switch; requires local ceramic bypassing. |
| SW | Switching node | Drain of internal N-MOSFET; connects to inductor and external Schottky diode cathode; high dV/dt node requiring tight layout. |
| FB | Feedback input | Inverting input of error amplifier; referenced to 1.225V internal precision bandgap; sets output voltage via resistive divider. |
| COMP | Error amplifier output | Provides access to EA output for external Type II compensation network between COMP and FB pins. |
| SS | Soft-start control | Internal 10µA current source charges external capacitor to ramp reference voltage; discharged during fault conditions. |
| RAMP | Emulated current ramp | Connects to external capacitor (50pF–2000pF) that sets slope of synthetic current ramp for PWM comparator. |
| RT | Oscillator frequency set | Resistor to AGND sets switching frequency from 50kHz to 500kHz; value calculated per TI Equation 1. |
| VCC | Bias regulator output | 7V regulated supply for internal circuitry; tracks VIN below 9V; accepts auxiliary 7.5V–14V input to reduce power dissipation. |
| IS | Diode current sense | Measures re-circulating diode anode current to generate DC level of emulated current signal; requires connection to diode anode. |
| GND | Analog and power ground | AGND (pins 9, 12) must be separated from noisy PGND planes in layout; EP pad tied to PGND for thermal path. |
Key Features
| Feature | Design Value |
|---|---|
| Emulated current-mode architecture | Eliminates need for current-sense resistor and associated noise filtering; enables stable operation at <10% duty cycles in high-VIN/low-VOUT applications. |
| Integrated 75V/330mΩ N-MOSFET | Reduces BOM count and board space; eliminates external high-voltage switch selection and gate-drive design effort. |
| Programmable soft start | External capacitor on SS pin controls startup slew rate, preventing inrush current into downstream capacitors and avoiding bus voltage droop. |
| Synchronization capability | SYNC pin supports master-slave configuration of multiple LM5575Q0MHX/NOPB devices to eliminate beat frequencies and reduce EMI in multi-rail systems. |
| AEC-Q100 Grade 1 qualification | Validated for −40°C to +125°C operation with HBM ESD ≥±2000V; meets automotive reliability and lifetime requirements for safety-critical subsystems. |
Applications
| Infotainment Power Supply | ADAS Camera Module |
|---|---|
Use Scenario: Powering SoC, display driver, and USB hub in automotive head unit with 12V/24V battery input and transient immunity requirements. IC Role / Device Role / Timing Role: Primary buck controller regulating 5V or 3.3V rail from raw battery; manages startup sequencing and load-step response. Use Value: 75V input rating withstands load-dump transients; emulated current mode ensures fast transient response to dynamic CPU loading. |
Use Scenario: Generating clean 1.8V/1.2V rails for image sensor and ISP in rear-view or surround-view camera modules mounted near engine bay. IC Role / Device Role / Timing Role: Point-of-load regulator converting 12V battery to low-noise core voltages; operates in thermally constrained plastic housing. Use Value: Exposed thermal pad and RθJC(bot) = 1.5°C/W enable conduction cooling through PCB; 1.225V reference supports precise low-voltage regulation. |
| Body Control Module (BCM) | Telematics Control Unit (TCU) |
Use Scenario: Supplying 5V logic rail and 3.3V MCU core voltage in door module or lighting controller exposed to wide ambient temperature swings. IC Role / Device Role / Timing Role: Main DC/DC converter handling cold-crank (6V) and hot-idle (16V) conditions while maintaining regulation across full AEC-Q100 temp range. Use Value: Dual-mode VCC regulator maintains internal bias during low-VIN cranking; shutdown threshold at 0.7V enables fail-safe disable during brownout. |
Use Scenario: Powering LTE modem, GNSS receiver, and microcontroller in cellular-connected vehicle gateway operating continuously with sleep/wake cycles. IC Role / Device Role / Timing Role: Always-on buck regulator with remote shutdown (SD pin) enabling ultra-low quiescent current (<70µA) in deep-sleep mode. Use Value: Standby mode (SD = 0.7–1.225V) keeps VCC active while disabling SW output, reducing system standby power without full reset. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM5576Q0MHX/NOPB | Same family, higher 3A output current rating; identical pinout and feature set except increased current capability and adjusted current limit threshold. | Required when >1.5A continuous load current or higher peak surge current is needed in same automotive environment. | Select LM5576Q0MHX/NOPB only if output current demand exceeds 1.5A; otherwise LM5575Q0MHX/NOPB offers optimal cost/size balance. |
| TPS543620QPWPRQ1 | 4.5V–60V input, 3A output; integrated FETs with lower Rds(on); uses traditional current-sense resistor instead of emulated ramp; no IS pin or RAMP pin. | Lacks diode-current sensing and emulated ramp architecture; less suitable for very low duty-cycle (<5%) high-VIN/low-VOUT designs. | Choose TPS543620QPWPRQ1 for higher efficiency at mid-range VIN/VOUT ratios where traditional sensing suffices; retain LM5575Q0MHX/NOPB for extreme duty-cycle stability. |
Compared with LM5576Q0MHX/NOPB, the LM5575Q0MHX/NOPB provides identical functionality at lower current rating and cost, making it optimal for 1.5A-class automotive rails; versus TPS543620QPWPRQ1, it trades off some peak efficiency for superior low-duty-cycle stability and reduced external component count via emulated current sensing.
Availability
LM5575Q0MHX/NOPB is available at Aetrix Electronics and suitable for automotive infotainment systems, ADAS camera modules, and body control units requiring stable component supply with AEC-Q100 compliance and long-term production support.
Supply support for LM5575Q0MHX/NOPB 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 power management technologies with over 50 years of automotive qualification experience.
The LM5575-Q1 product line delivers high-voltage buck regulators optimized for automotive power conversion, targeting robustness against battery transients, extended temperature operation, and simplified design-in for Tier 1 suppliers and ECU developers.
FAQ
What is the maximum input voltage rating for LM5575Q0MHX/NOPB?
The LM5575Q0MHX/NOPB has an absolute maximum input voltage rating of 76V, with recommended operating range from 6V to 75V. This allows direct connection to 12V and 24V automotive battery systems while surviving load-dump transients up to 75V per ISO 7637-2. Exceeding 76V risks permanent damage to the internal 75V MOSFET and bias circuitry.
Does LM5575Q0MHX/NOPB require an external Schottky diode?
Yes, the LM5575Q0MHX/NOPB requires an external Schottky diode connected between the SW pin and output rail. Although it integrates a 75V N-channel MOSFET as the high-side switch, it does not include a synchronous rectifier; the diode provides the low-side conduction path during the switch off-time. TI recommends CMSH3-100 or equivalent 100V/3A Schottky diodes.
How is the switching frequency set on LM5575Q0MHX/NOPB?
The switching frequency of LM5575Q0MHX/NOPB is set by a single resistor (RT) connected between the RT pin and AGND. Using TI's Equation 1 (RT = (1/(F × 135×10⁻¹²)) − 580×10⁻⁹), a 32.4kΩ resistor yields ~200kHz. Frequency range is 50kHz to 500kHz; resistor placement must be adjacent to the IC with short traces to minimize noise coupling.
What is the purpose of the IS pin on LM5575Q0MHX/NOPB?
The IS pin on LM5575Q0MHX/NOPB senses the re-circulating current through the external Schottky diode's anode. It feeds an internal sample-and-hold circuit that generates the DC level portion of the emulated current ramp used for cycle-by-cycle current limiting. Correct connection of the diode anode to IS is mandatory for accurate overcurrent protection and stable regulation.
Can LM5575Q0MHX/NOPB operate with input voltage below 9V?
Yes, LM5575Q0MHX/NOPB operates down to 6V input. Its dual-mode VCC regulator directly passes VIN to VCC below 9V, enabling full functionality during cold-crank conditions. At VIN < 9V, VCC ≈ VIN; above 9V, VCC is regulated to 7V. This architecture ensures reliable startup and biasing across the full automotive battery voltage range.
LM5575Q0MHX/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- SIMPLE SWITCHER®
- Package/Case:
- 16-PowerTSSOP (0.173", 4.40mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 6V
- Voltage - Input (Max):
- 75V
- Voltage - Output (Min/Fixed):
- 1.225V
- Voltage - Output (Max):
- 70V
- Current - Output:
- 1.5A
- Frequency - Switching:
- 50kHz ~ 500kHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-HTSSOP
LM5575Q0MHX/NOPB FAQ
1.How can I place an order for LM5575Q0MHX/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM5575Q0MHX/NOPB 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 LM5575Q0MHX/NOPB reliable?
The price and inventory of LM5575Q0MHX/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM5575Q0MHX/NOPB is usually 5 days.
3.What payment methods are accepted for LM5575Q0MHX/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM5575Q0MHX/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM5575Q0MHX/NOPB?
LM5575Q0MHX/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM5575Q0MHX/NOPB 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 LM5575Q0MHX/NOPB?
For technical support, including LM5575Q0MHX/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM5575Q0MHX/NOPB requirements.
6.How does Aetrix verify that LM5575Q0MHX/NOPB is sourced from the original manufacturer or authorized distributors?
All LM5575Q0MHX/NOPB 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 LM5575Q0MHX/NOPB meets industry standards.
7.What is the process for return or replacement of LM5575Q0MHX/NOPB?
All LM5575Q0MHX/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM5575Q0MHX/NOPB, 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 LM5575Q0MHX/NOPB part is unused and in its original packaging.
Return procedure for LM5575Q0MHX/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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