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Texas Instruments LM5575Q0MH/NOPB
- Part No.:
- LM5575Q0MH/NOPB
- Manufacturer:
- Texas Instruments
- Package:
- 16-PowerTSSOP (0.173", 4.40mm Width)
- Datasheet:
-
LM5575Q0MH/NOPB.pdf
- Description:
- IC REG BUCK ADJ 1.5A 16HTSSOP
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
LM5575Q0MH/NOPB from Texas Instruments is an AEC-Q100 Grade 1 automotive buck switching regulator 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 LM5575Q0MH/NOPB datasheet, LM5575Q0MH/NOPB pinout, LM5575Q0MH/NOPB application, or LM5575Q0MH/NOPB equivalent, key selection criteria include its 1.65% feedback reference accuracy, 50kHz–500kHz programmable switching frequency, cycle-by-cycle current limit, thermal shutdown at 165°C, and HTSSOP-16 package with exposed thermal pad for automotive under-hood thermal management.
Technical Context
The LM5575Q0MH/NOPB implements emulated current-mode control using a voltage-controlled ramp generator (IRAMP = (10 µA × (VIN – VOUT)) + 50 µA) and diode-current-sampled DC level to reconstruct inductor current-eliminating leading-edge spikes and enabling reliable operation at very low duty cycles. Its dual-mode VCC regulator tracks VIN ≤9V and regulates to 7V above 9V, supporting wide-input operation without external bias supply.
Functional integration includes SYNC pin for master-slave synchronization of multiple regulators, soft-start via 10µA current source into external capacitor, and dual-threshold shutdown (0.7V shutdown / 1.225V enable) with 5µA internal pullup. Protection features are cycle-by-cycle current limiting (2.1A typ), thermal shutdown (165°C), and VCC UVLO (5.35V).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 6V to 75V - supports direct connection to automotive battery (cold-crank down to 6V) and industrial 48V bus without pre-regulation. |
| Output Current | 1.5A continuous - sufficient for powering microcontrollers, sensors, and interface ICs in automotive ECUs. |
| Feedback Reference | 1.225V ±1.65% - enables precise output setting with minimal error across temperature (−40°C to +125°C). |
| Switch RDS(on) | 330mΩ max - limits conduction loss at full load, enabling >90% efficiency in typical 12V→5V/1.5A designs. |
| Switching Frequency | 50kHz to 500kHz - adjustable via single RT resistor; higher frequencies reduce inductor size, lower frequencies improve light-load efficiency. |
| Junction Temp Range | −40°C to +150°C - meets AEC-Q100 Grade 1 requirements for under-hood automotive placement. |
| Thermal Resistance | RθJC(bot) = 1.5°C/W - exposed pad enables direct thermal path to PCB ground plane for sustained 1.5A operation. |
Pinout & Package
The LM5575Q0MH/NOPB is housed in a 16-pin HTSSOP (PWP) package measuring 5mm × 4.4mm with an exposed thermal pad on the underside, requiring solder connection to PCB ground plane for optimal thermal performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | Main input supply | Accepts 6V–75V unregulated input; powers internal high-voltage start-up regulator and buck switch. |
| VCC | Bias regulator output | Provides 7V regulated supply for control circuitry; can be externally powered (7.5V–14V) to reduce IC dissipation. |
| SW | Switching node | Drives external Schottky diode and buck inductor; connects internally to source of integrated 75V MOSFET. |
| BST | Bootstrap capacitor input | Connects to SW via 0.022µF ceramic capacitor to generate gate drive voltage for high-side switch. |
| FB | Feedback input | Connects to resistor divider from output; internal 1.225V reference sets output voltage (VOUT = 1.225V × (1 + R1/R2)). |
| COMP | Error amplifier output | Interface for external type-II compensation network between COMP and FB to stabilize loop response. |
| RT | Oscillator frequency set | Single resistor to AGND programs switching frequency from 50kHz to 500kHz per TI Equation 1. |
| SD | Shutdown control | 0.7V threshold disables regulator; 1.225V enables operation; internal 5µA pullup allows open-circuit enable. |
| SS | Soft-start timing | 10µA internal current charges external capacitor to ramp up reference voltage and prevent inrush current. |
| RAMP | Emulated current ramp | External capacitor (50pF–2000pF) sets slope; IRAMP = (10µA × (VIN − VOUT)) + 50µA enables noise-immune current-mode control. |
| IS | Diode current sense | Connects to Schottky diode anode; samples re-circulating current to provide DC level for emulated ramp. |
| SYNC | Oscillator sync I/O | Allows synchronization of multiple LM5575Q0MH/NOPB devices or to external clock; open-drain compatible. |
| PRE | Bootstrap pre-charge | Open-drain output pulsed 250ns before switch-on to assist BST capacitor charging during light-load or pre-biased conditions. |
| AGND | Analog ground | Reference for FB, COMP, RT, RAMP, SS; must be separated from PGND in layout to avoid noise coupling. |
| PGND | Power ground | Return path for IS sense resistor and low-side switch; connects to power stage ground plane. |
| OUT | Regulated output | Direct connection point for output capacitor; provides filtered DC output voltage to load. |
Key Features
| Feature | Design Value |
|---|---|
| Emulated current-mode architecture | Eliminates need for current-sense resistor and associated filtering/blanking; enables stable regulation at <10% duty cycle in 48V→3.3V applications. |
| AEC-Q100 Grade 1 qualification | Validated for −40°C to +125°C ambient operation with HBM ESD ≥±2000V - suitable for engine bay and transmission control modules. |
| Integrated 75V/330mΩ MOSFET | Reduces BOM count by eliminating external high-voltage switch; supports direct 75V transients without external clamping. |
| Adjustable soft-start | External capacitor on SS pin controls rise time of output voltage - prevents inrush into downstream capacitors and avoids brownout in multi-rail systems. |
| Controller synchronization | SYNC pin enables deterministic phase alignment of multiple converters - reduces input ripple and EMI peak amplitude in multi-output systems. |
| Thermal shutdown with hysteresis | Shuts down at 165°C junction temperature and restarts only after cooling by 25°C - prevents thermal runaway while allowing recovery without system reset. |
Applications
| Automotive Infotainment Power | ADAS Camera Module Supply |
|---|---|
|
Use Scenario: Powering SoC, DDR memory, and display interface in head unit with 12V/24V battery input and cold-crank resilience. IC Role / Device Role / Timing Role: Primary buck regulator generating 5V/3.3V rails; handles 6V–75V input transients including load dump. Use Value: Integrated 75V MOSFET and 1.5A capability eliminate need for external HV switch and pre-regulator, reducing board area by >30% vs discrete solutions. |
Use Scenario: Providing stable 3.3V supply to image sensor and ISP in rear-view or surround-view camera module mounted near bumper. IC Role / Device Role / Timing Role: Point-of-load regulator with thermal shutdown and soft-start; operates continuously in −40°C to +105°C ambient. Use Value: Emulated current-mode control ensures fast transient response to sensor frame-rate current pulses without output droop or overshoot. |
| Industrial 48V Bus Converter | Commercial Vehicle Telematics |
|
Use Scenario: Converting 48V telecom/industrial bus to 12V intermediate rail for motor drivers and communication interfaces. IC Role / Device Role / Timing Role: High-efficiency step-down controller operating at 200kHz; synchronized to system clock via SYNC pin. Use Value: Programmable frequency allows optimization for lowest EMI in noisy factory environments while maintaining >92% efficiency at full load. |
Use Scenario: Powering GPS/GSM module, CAN transceiver, and microcontroller in fleet management ECU exposed to vibration and wide temperature swings. IC Role / Device Role / Timing Role: AEC-Q100-compliant primary regulator with remote shutdown (SD pin) for low-power sleep mode. Use Value: 70µA shutdown current and dual-threshold SD pin enable <100µA system standby power - extends battery life during vehicle idle. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM5576Q0MH/NOPB | Same pinout and architecture but rated for 100V input (vs 75V); higher RDS(on) (450mΩ) and same 1.5A current rating. | Required where input may exceed 75V (e.g., 96V battery systems or severe load-dump events). | Select LM5576Q0MH/NOPB only if 100V absolute maximum rating is mandatory; LM5575Q0MH/NOPB offers lower conduction loss below 75V. |
| TPS54362-Q1 | 65V max input, 3.5A output, integrated FET, but uses voltage-mode control and lacks SYNC pin or emulated current sensing. | Suitable for higher-current, lower-voltage applications (e.g., 12V→3.3V@3A) where EMI profile differs and loop compensation is simpler. | Choose TPS54362-Q1 when >2A output or smaller solution size is critical; LM5575Q0MH/NOPB preferred for 75V tolerance and superior transient response in 1.5A designs. |
Compared with LM5576Q0MH/NOPB, the LM5575Q0MH/NOPB delivers lower RDS(on) and better efficiency in 6V–75V systems, while versus TPS54362-Q1 it provides superior line/load transient response and deterministic synchronization-critical for multi-rail automotive power domains.
Availability
LM5575Q0MH/NOPB is available at Aetrix Electronics and suitable for automotive infotainment, ADAS camera modules, and industrial 48V bus conversion requiring stable component supply, AEC-Q100 compliance, and long-term production continuity.
Supply support for LM5575Q0MH/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 company specializing in analog and embedded processing technologies, with leadership in power management ICs for automotive, industrial, and communications markets.
The LM5575Q0MH/NOPB belongs to TI's automotive-grade SIMPLE SWITCHER® buck regulator family, designed specifically for robust, easy-to-implement DC/DC conversion in harsh automotive environments where reliability, thermal performance, and transient immunity are critical.
FAQ
What is the maximum input voltage rating for the LM5575Q0MH/NOPB?
The LM5575Q0MH/NOPB has an absolute maximum input voltage (VIN to GND) rating of 76V, with recommended operating range from 6V to 75V. This allows direct connection to 24V and 48V industrial buses and automotive batteries-including transient conditions like load dump-without external protection circuitry. Exceeding 76V risks permanent damage per the Absolute Maximum Ratings table in the datasheet.
Does the LM5575Q0MH/NOPB require an external bootstrap capacitor?
Yes, the LM5575Q0MH/NOPB requires a 0.022µF ceramic capacitor between BST and SW pins to generate the gate drive voltage for its internal high-side MOSFET. TI specifies this value for reliable bootstrapping across temperature and load conditions. The PRE pin provides auxiliary pre-charge assistance during light-load or pre-biased startup, but does not eliminate the need for the BST capacitor.
How is the switching frequency programmed on the LM5575Q0MH/NOPB?
The switching frequency of the LM5575Q0MH/NOPB is set by a single resistor (RT) connected between the RT pin and AGND. Using TI's Equation 1 (RT = (1/F) × 1.35×10⁻⁹ − 5.8×10⁻⁷), a 32.4kΩ resistor yields ~200kHz. Frequency ranges from 50kHz to 500kHz, with tighter tolerance achieved using 1% metal-film resistors placed close to the IC to minimize parasitic effects.
Can the LM5575Q0MH/NOPB synchronize to an external clock signal?
Yes, the LM5575Q0MH/NOPB supports oscillator synchronization via its open-drain SYNC pin. An external clock with frequency higher than the free-running frequency (set by RT) and pulse width >15ns can be applied. Multiple LM5575Q0MH/NOPB devices can also be synchronized together by connecting their SYNC pins-ensuring deterministic phase alignment and reduced input ripple in multi-converter systems.
What thermal management provisions does the LM5575Q0MH/NOPB include?
The LM5575Q0MH/NOPB features an exposed thermal pad (EP) on the underside of its HTSSOP-16 package, with RθJC(bot) = 1.5°C/W. TI recommends soldering this pad directly to a large PCB copper area tied to ground for effective heat transfer. Combined with thermal shutdown at 165°C and 25°C hysteresis, this enables continuous 1.5A operation in ambient temperatures up to +105°C with proper layout.
LM5575Q0MH/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- SIMPLE SWITCHER®
- Package/Case:
- 16-PowerTSSOP (0.173", 4.40mm Width)
- Packaging:
- Tube
- 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
LM5575Q0MH/NOPB FAQ
1.How can I place an order for LM5575Q0MH/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM5575Q0MH/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 LM5575Q0MH/NOPB reliable?
The price and inventory of LM5575Q0MH/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM5575Q0MH/NOPB is usually 5 days.
3.What payment methods are accepted for LM5575Q0MH/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM5575Q0MH/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM5575Q0MH/NOPB?
LM5575Q0MH/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM5575Q0MH/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 LM5575Q0MH/NOPB?
For technical support, including LM5575Q0MH/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM5575Q0MH/NOPB requirements.
6.How does Aetrix verify that LM5575Q0MH/NOPB is sourced from the original manufacturer or authorized distributors?
All LM5575Q0MH/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 LM5575Q0MH/NOPB meets industry standards.
7.What is the process for return or replacement of LM5575Q0MH/NOPB?
All LM5575Q0MH/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM5575Q0MH/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 LM5575Q0MH/NOPB part is unused and in its original packaging.
Return procedure for LM5575Q0MH/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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