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Texas Instruments LM22675MRE-ADJ/NOPB
- Part No.:
- LM22675MRE-ADJ/NOPB
- Manufacturer:
- Texas Instruments
- Package:
- 8-PowerSOIC (0.154", 3.90mm Width)
- Datasheet:
-
LM22675MRE-ADJ/NOPB.pdf
- Description:
- IC REG BUCK ADJ 1A 8SOPWR
- Quantity:
- Payment:
- Shipping:
Inventory:1,229
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Product details
Overview
LM22675MRE-ADJ/NOPB from Texas Instruments is a 42 V, 1 A adjustable-output synchronous step-down DC/DC regulator in an HSOP-8 PowerPAD package. It integrates a 200 mΩ N-channel MOSFET switch, operates at 500 kHz fixed frequency, delivers ±1.5% feedback reference accuracy down to 1.285 V output, and supports industrial temperature range (–40°C to 125°C). It is used in point-of-load conversion for industrial control and telecom power rails.
For engineers reviewing the LM22675MRE-ADJ/NOPB datasheet, LM22675MRE-ADJ/NOPB pinout, LM22675MRE-ADJ/NOPB application, or LM22675MRE-ADJ/NOPB equivalent, key selection criteria include input voltage range (4.5–42 V), internal compensation for <5 V outputs, integrated bootstrap diode, soft-start timing (500 µs), and thermal shutdown at 150°C.
Technical Context
The LM22675MRE-ADJ/NOPB implements voltage-mode PWM control with input voltage feedforward to stabilize loop gain across input variations. Its internal Type III compensation network is optimized for output voltages ≤5 V and eliminates external compensation components.
It features a precision enable input with 1.6 V threshold and 0.6 V hysteresis, integrated soft-start (500 µs typical), and a dedicated BOOT pin driving the high-side MOSFET gate via an external 10 nF ceramic capacitor. Minimum on-time (100 ns) and off-time (200 ns) constrain duty-cycle limits for stable operation across wide VIN/VOUT ratios.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5 V to 42 V - supports direct connection to 12 V, 24 V, and 36 V industrial/commercial rails without pre-regulation. |
| Output Current | 1 A continuous - sufficient for powering microcontrollers, FPGAs, and analog circuitry in embedded systems. |
| Switching Frequency | 500 kHz - enables use of compact 2.2 µH–10 µH inductors and low-ESR ceramic output capacitors. |
| Feedback Reference | 1.285 V ±1.5% - sets minimum adjustable output; defines accuracy of external resistor divider for custom VOUT. |
| RDS(ON) | 0.20 Ω (typ) - reduces conduction loss at full load; contributes to >90% peak efficiency at mid-load conditions. |
| Quiescent Current | 3.4 mA (typ) - ensures low no-load power draw in always-on subsystems; standby current drops to 25 µA in shutdown. |
| Junction Temp Range | –40°C to 125°C - qualified for harsh environments including factory automation and outdoor telecom equipment. |
Pinout & Package
LM22675MRE-ADJ/NOPB uses the HSOP-8 PowerPAD (DDA) package with 4.89 mm × 3.90 mm body size and exposed thermal pad connected to GND for enhanced heat dissipation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| BOOT | Bootstrap supply node | Connects external 10 nF ceramic capacitor to SW; supplies gate drive voltage for internal high-side N-MOSFET. |
| EN | Enable control input | Logic-level input with 1.6 V threshold; enables precise power sequencing and external UVLO implementation. |
| SW | Switch node | Drives external Schottky diode and output inductor; swings from ~0 V to VIN during operation. |
| FB | Feedback input | High-impedance (230 nA bias) node sensing output voltage via external resistor divider; sets regulated VOUT. |
| GND | Power and signal ground | Common return path for power stage and control circuitry; exposed pad must be soldered to PCB GND plane. |
| VIN | Main input supply | Accepts 4.5–42 V DC; powers internal LDO, gate driver, and control logic; requires local 10 µF ceramic bypass. |
Key Features
| Feature | Design Value |
|---|---|
| Internally compensated control loop | Eliminates need for external compensation components; optimized for 1.285–5 V outputs using standard LC filter designs. |
| Integrated bootstrap diode | Reduces BOM count by eliminating discrete bootstrap diode; simplifies layout and improves reliability in high-frequency operation. |
| Stable with ceramic capacitors | Supports low-ESR ceramic output caps (e.g., 22 µF X5R); avoids instability risks associated with electrolytic or tantalum alternatives. |
| Fixed 500 kHz switching | Enables predictable EMI filtering and consistent transient response; avoids variable-frequency artifacts in noise-sensitive applications. |
| Thermal shutdown & current limit | Protects against sustained overloads and PCB overheating; triggers at 150°C junction temp and 1.5 A peak switch current. |
Applications
| Industrial Control Power | Telecom Line Card Supply |
|---|---|
Use Scenario: Providing clean 3.3 V or 5 V rail to PLC I/O modules operating from 24 V DC field bus. IC Role / Device Role / Timing Role: Primary buck converter regulating point-of-load voltage; handles line transients up to 42 V surge. Use Value: Internal 42 V rating and –40°C to 125°C operation ensure uninterrupted function in uncontrolled cabinet environments. | Use Scenario: Generating 12 V intermediate rail from –48 V telecom battery backup for Ethernet PHY and management MCU. IC Role / Device Role / Timing Role: Step-down regulator in inverted-buck-boost configuration (per datasheet Figure 14); accepts negative input with proper grounding. Use Value: 500 kHz switching and ceramic-capacitor stability allow compact, low-noise design meeting NEBS Level 3 requirements. |
| Embedded System Core Supply | Automotive Body Control Module |
Use Scenario: Delivering 1.8 V or 2.5 V core voltage to ARM Cortex-M7 microcontroller in factory HMI panel. IC Role / Device Role / Timing Role: Adjustable-output buck regulator with FB divider; provides precise, low-noise supply under dynamic load steps. Use Value: ±1.5% reference accuracy and 500 µs soft-start prevent brownout during cold boot and reduce inrush stress on input capacitors. | Use Scenario: Regulating 5 V supply for CAN transceiver and sensor interface in non-safety-critical BCM. IC Role / Device Role / Timing Role: Secondary power rail generator downstream of main 12 V automotive battery; enabled only after system wake-up. Use Value: Precision enable pin with 0.6 V hysteresis allows reliable sequencing with other TI power ICs; AEC-Q100 Grade 1 qualification confirmed for LM22675-Q1 variant. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM22670MRE-ADJ/NOPB | Lower 3 V min input, 150 kHz switching, higher RDS(ON) (0.32 Ω), no integrated bootstrap diode. | Better suited for low-input, low-EMI applications where size is less critical than efficiency at light loads. | Select when input voltage stays ≥3 V and 500 kHz EMI is unacceptable; accept larger magnetics and external bootstrap diode. |
| TPS54302DDCR | 3.5–28 V input, 1 A, 2.5 MHz switching, integrated high/low-side FETs, no BOOT pin required. | Designed for ultra-compact layouts; lacks 42 V rating and automotive temp support of LM22675MRE-ADJ/NOPB. | Choose for space-constrained consumer or computing applications with ≤28 V input; avoid in industrial 36 V+ systems. |
Compared with LM22675MRE-ADJ/NOPB, LM22670MRE-ADJ/NOPB trades input voltage headroom and integration for lower quiescent current, while TPS54302DDCR offers higher frequency and smaller passives but sacrifices high-voltage robustness and extended temperature capability.
Availability
LM22675MRE-ADJ/NOPB is available at Aetrix Electronics and suitable for industrial control, telecom power conversion, and embedded system power management requiring stable component supply across long production lifecycles.
Supply support for LM22675MRE-ADJ/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 delivering analog, embedded processing, and connectivity solutions for industrial, automotive, and communications markets.
The LM22675MRE-ADJ/NOPB belongs to TI's SIMPLE SWITCHER® family-designed for ease-of-use, minimal external components, and rapid design-in using WEBENCH® tools for power supply development.
FAQ
What is the minimum output voltage achievable with LM22675MRE-ADJ/NOPB?
The LM22675MRE-ADJ/NOPB has a nominal feedback reference voltage of 1.285 V, which sets the lowest possible output voltage when the FB pin is connected directly to VOUT. With an external resistor divider, outputs as low as 1.285 V can be accurately regulated. The ±1.5% reference accuracy ensures tight tolerance across temperature and line conditions, making LM22675MRE-ADJ/NOPB suitable for low-voltage digital core supplies.
Does LM22675MRE-ADJ/NOPB require an external bootstrap diode?
No, LM22675MRE-ADJ/NOPB integrates a bootstrap diode internally, eliminating the need for an external component between BOOT and SW pins. This reduces bill-of-materials count and layout complexity. Users must still place a 10 nF ceramic capacitor from BOOT to SW with short, low-inductance traces to ensure reliable high-side gate drive during each switching cycle.
Can LM22675MRE-ADJ/NOPB operate with ceramic output capacitors only?
Yes, LM22675MRE-ADJ/NOPB is explicitly characterized and stabilized for use with low-ESR ceramic output capacitors, including X5R and X7R types. The internal compensation and voltage-mode architecture ensure loop stability without requiring the ESR zero provided by aluminum or tantalum capacitors-simplifying design and improving reliability in high-reliability applications.
What is the purpose of the EN pin hysteresis in LM22675MRE-ADJ/NOPB?
The EN pin of LM22675MRE-ADJ/NOPB features 0.6 V typical hysteresis to prevent oscillation during slow-rising or noisy enable signals. The rising threshold is ~1.6 V and falling threshold is ~1.0 V, ensuring clean turn-on/turn-off transitions. This allows robust power sequencing in multi-rail systems and enables simple external UVLO using resistor dividers from higher-voltage rails without risk of chatter.
How does thermal protection work in LM22675MRE-ADJ/NOPB?
LM22675MRE-ADJ/NOPB incorporates a thermal shutdown circuit that disables switching when junction temperature reaches ~150°C. The device remains latched off until temperature falls to ~135°C, providing hysteresis to prevent cycling. During normal operation, the exposed PowerPAD package must be soldered to a thermally robust GND plane; the datasheet specifies 60°C/W junction-to-ambient resistance under 1-inch² copper conditions.
LM22675MRE-ADJ/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- SIMPLE SWITCHER®
- Package/Case:
- 8-PowerSOIC (0.154", 3.90mm 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):
- 4.5V
- Voltage - Input (Max):
- 42V
- Voltage - Output (Min/Fixed):
- 1.285V
- Voltage - Output (Max):
- 37V
- Current - Output:
- 1A
- Frequency - Switching:
- 500kHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SO PowerPad
LM22675MRE-ADJ/NOPB FAQ
1.How can I place an order for LM22675MRE-ADJ/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM22675MRE-ADJ/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 LM22675MRE-ADJ/NOPB reliable?
The price and inventory of LM22675MRE-ADJ/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM22675MRE-ADJ/NOPB is usually 5 days.
3.What payment methods are accepted for LM22675MRE-ADJ/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM22675MRE-ADJ/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM22675MRE-ADJ/NOPB?
LM22675MRE-ADJ/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM22675MRE-ADJ/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 LM22675MRE-ADJ/NOPB?
For technical support, including LM22675MRE-ADJ/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM22675MRE-ADJ/NOPB requirements.
6.How does Aetrix verify that LM22675MRE-ADJ/NOPB is sourced from the original manufacturer or authorized distributors?
All LM22675MRE-ADJ/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 LM22675MRE-ADJ/NOPB meets industry standards.
7.What is the process for return or replacement of LM22675MRE-ADJ/NOPB?
All LM22675MRE-ADJ/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM22675MRE-ADJ/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 LM22675MRE-ADJ/NOPB part is unused and in its original packaging.
Return procedure for LM22675MRE-ADJ/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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