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Texas Instruments LM22675QMRE-ADJ/NOPB
- Part No.:
- LM22675QMRE-ADJ/NOPB
- Manufacturer:
- Texas Instruments
- Package:
- 8-PowerSOIC (0.154", 3.90mm Width)
- Datasheet:
-
LM22675QMRE-ADJ/NOPB.pdf
- Description:
- IC REG BUCK ADJ 1A 8SOPWR
- Quantity:
- Payment:
- Shipping:
Inventory:558
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Product details
Overview
LM22675QMRE-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 telecom power supplies.
For engineers reviewing the LM22675QMRE-ADJ/NOPB datasheet, LM22675QMRE-ADJ/NOPB pinout, LM22675QMRE-ADJ/NOPB application, or LM22675QMRE-ADJ/NOPB equivalent, key selection criteria include input voltage range (4.5–42 V), thermal performance with exposed pad, internal compensation for <5 V outputs, precision enable threshold (1.6 V typ), and soft-start timing (500 µs).
Technical Context
The LM22675QMRE-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, enabling stable operation with low-ESR ceramic capacitors without external compensation components.
It features integrated bootstrap diode, precision enable with 0.6 V hysteresis, and thermal shutdown at 150°C. The device enforces minimum on-time (100 ns) and off-time (200 ns) to ensure current-sense accuracy and boot-capacitor recharge, limiting practical VIN/VOUT ratios but enabling reliable 500 kHz switching up to 42 V input.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5 V to 42 V - supports wide industrial and automotive rails including 24 V and 36 V systems |
| Output Current | 1 A continuous - sufficient for FPGA core, microcontroller, or DSP point-of-load regulation |
| Switching Frequency | 500 kHz (±100 kHz) - enables compact magnetics and fast transient response |
| Feedback Reference | 1.285 V ±1.5% - sets minimum adjustable output; defines resistor-divider ratio for precise VOUT |
| RDS(ON) | 200 mΩ (typ) - limits conduction loss at full load; determines thermal rise under 1 A |
| Quiescent Current | 3.4 mA (typ) - maintains efficiency at light loads; impacts no-load power budget |
| Standby Current | 25 µA (typ) - enables ultra-low-power shutdown mode for battery-backed systems |
| Junction Temp Range | –40°C to 125°C - qualified for extended industrial environments; requires thermal pad soldering |
Pinout & Package
LM22675QMRE-ADJ/NOPB uses the HSOP-8 PowerPAD (DDA) package with 4.89 mm × 3.90 mm body and thermally enhanced exposed pad (EP) that must be soldered to PCB ground plane for thermal management and EMI reduction.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| BOOT | Bootstrap supply node | Drives high-side MOSFET gate; requires 10 nF ceramic capacitor between BOOT and SW |
| EN | Enable control input | Logic-compatible shutdown pin with 1.6 V threshold and 0.6 V hysteresis; internal 6 µA pull-up |
| SW | Switch node | Connects to external inductor and Schottky catch diode; swings from GND to VIN |
| FB | Feedback input | High-impedance (230 nA bias) error amplifier input; sets output via resistor divider |
| GND | Power and signal ground | Common return for internal circuitry and external components; ties to EP |
| VIN | Main power input | Supplies internal LDO and gate driver; accepts 4.5–42 V with UVLO at 4.3 V rising |
| NC (Pins 2, 3) | No-connect terminals | Thermally conductive only; must not be electrically connected or routed |
| EP | Exposed thermal pad | Must be soldered to ≥1 in² copper pour tied to GND; critical for RθJA = 60°C/W |
Key Features
| Feature | Design Value |
|---|---|
| Internally compensated control | Eliminates external compensation network; validated for 1.285–5 V outputs with ceramic output caps |
| Integrated bootstrap diode | Removes need for external bootstrap diode; reduces BOM count and layout complexity |
| Fixed 500 kHz switching | Enables predictable EMI filtering and consistent inductor sizing across designs |
| 500 µs soft-start | Prevents inrush current and output overshoot during power-up; non-adjustable |
| Stable with ceramic capacitors | Supports low-ESR MLCCs (≥10 µF typical); avoids electrolytic capacitor aging and size penalties |
| Precision enable with hysteresis | Allows clean sequencing of multiple rails using resistor dividers; prevents chatter near threshold |
Applications
| Industrial PLC I/O Module | Telecom Remote Radio Unit |
|---|---|
Use Scenario: Regulating 3.3 V or 5 V from 24 V backplane for FPGA configuration, ADC/DAC interfaces, and isolated communication ICs. IC Role / Device Role / Timing Role: Primary buck converter delivering regulated 1 A rail; handles line transients and thermal cycling in enclosed enclosures. Use Value: Internal compensation and 125°C junction rating eliminate tuning effort and support fanless operation in DIN-rail mounted controllers. | Use Scenario: Generating 12 V and 3.3 V from 48 V telecom rectified bus for RF power amplifiers and baseband processors. IC Role / Device Role / Timing Role: Secondary-stage step-down regulator after front-end isolation; manages dynamic load steps from burst-mode transmission. Use Value: 500 kHz switching and 100 ns minimum on-time allow efficient conversion from 48 V down to 3.3 V with minimal duty-cycle limitation. |
| Automotive Body Control Module | Embedded Medical Sensor Hub |
Use Scenario: Powering microcontrollers, CAN transceivers, and LED drivers from 12 V battery rail subject to cold-crank (4.5 V) and load-dump (42 V) events. IC Role / Device Role / Timing Role: Input-tolerant buck regulator with UVLO and thermal shutdown; replaces discrete solutions requiring external protection. Use Value: 4.5–42 V input range and AEC-Q100 Grade 1 qualification (via LM22675-Q1 variant) ensure robustness across automotive operating conditions. | Use Scenario: Providing low-noise, tightly regulated 1.8 V and 3.3 V rails for precision analog front-ends and wireless SoCs in portable diagnostic devices. IC Role / Device Role / Timing Role: Point-of-load regulator with soft-start and low standby current; powers subsystems during intermittent sensing cycles. Use Value: 25 µA shutdown current extends battery life; ±1.5% reference accuracy ensures sensor ADC reference stability over temperature. |
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, no integrated bootstrap diode | Better for low-input, low-EMI, cost-sensitive designs; requires external bootstrap diode | Choose when input stays ≥3 V and EMI constraints favor lower frequency |
| TPS54302DDAR | 3.5–28 V input, 3 A output, 1 MHz switching, external compensation | Higher current, higher frequency, more flexible loop tuning; larger solution size | Choose when >1 A load or tighter transient response is required |
Compared with LM22675QMRE-ADJ/NOPB, LM22670MRE-ADJ/NOPB trades input voltage range and integration for lower cost and EMI, while TPS54302DDAR offers higher current and frequency at the expense of added design complexity and external components.
Availability
LM22675QMRE-ADJ/NOPB is available at Aetrix Electronics and suitable for industrial control, telecom power systems, and embedded medical devices requiring stable component supply, long-term lifecycle support, and AEC-Q100-aligned reliability.
Supply support for LM22675QMRE-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 designing analog, embedded processing, and connectivity technologies for industrial, automotive, and communications markets.
LM22675QMRE-ADJ/NOPB belongs to TI's SIMPLE SWITCHER® family-engineered for ease-of-use in non-isolated DC/DC buck conversion with minimal external components and WEBENCH® design tool integration.
FAQ
What is the minimum output voltage supported by LM22675QMRE-ADJ/NOPB?
The LM22675QMRE-ADJ/NOPB supports a minimum output voltage of 1.285 V, set by its internal feedback reference voltage. This value is specified with ±1.5% accuracy over –40°C to 125°C junction temperature. Output voltage is adjusted using an external resistor divider connected between VOUT, FB, and GND; the FB pin draws only 230 nA bias current, minimizing divider error.
Does LM22675QMRE-ADJ/NOPB require an external bootstrap diode?
No, LM22675QMRE-ADJ/NOPB integrates a bootstrap diode internally, eliminating the need for an external component. A 10 nF ceramic capacitor must still be placed between BOOT and SW pins with short, low-inductance traces. This integration reduces BOM count and improves reliability compared to controllers requiring external bootstrap solutions.
What thermal management is required for LM22675QMRE-ADJ/NOPB?
LM22675QMRE-ADJ/NOPB requires soldering its exposed thermal pad (EP) to a minimum 1 in² copper area connected to GND. This achieves the specified RθJA of 60°C/W. Without proper thermal pad connection, junction temperature can exceed 150°C under 1 A load, triggering thermal shutdown. Layout guidelines recommend multiple thermal vias under the pad and avoidance of split planes beneath the device.
Can LM22675QMRE-ADJ/NOPB operate with ceramic output capacitors?
Yes, LM22675QMRE-ADJ/NOPB is explicitly designed to be stable with low-ESR ceramic capacitors-no electrolytic or tantalum capacitors required. The internal Type III compensation is optimized for ceramic output caps ≥10 µF. This enables smaller footprint, longer lifetime, and improved temperature stability versus traditional capacitor types.
What is the purpose of the EN pin hysteresis in LM22675QMRE-ADJ/NOPB?
The EN pin hysteresis (0.6 V typ) in LM22675QMRE-ADJ/NOPB prevents oscillation during slow-rising or noisy enable signals. With a 1.6 V turn-on threshold and 1.0 V turn-off threshold, it ensures clean, chatter-free startup and shutdown-critical when enabling from resistor-divided rails or in electrically noisy industrial environments. The internal 6 µA pull-up also allows direct connection to VIN if sequencing is not required.
LM22675QMRE-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:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SO PowerPad
LM22675QMRE-ADJ/NOPB FAQ
1.How can I place an order for LM22675QMRE-ADJ/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM22675QMRE-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 LM22675QMRE-ADJ/NOPB reliable?
The price and inventory of LM22675QMRE-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 LM22675QMRE-ADJ/NOPB is usually 5 days.
3.What payment methods are accepted for LM22675QMRE-ADJ/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM22675QMRE-ADJ/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM22675QMRE-ADJ/NOPB?
LM22675QMRE-ADJ/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM22675QMRE-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 LM22675QMRE-ADJ/NOPB?
For technical support, including LM22675QMRE-ADJ/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM22675QMRE-ADJ/NOPB requirements.
6.How does Aetrix verify that LM22675QMRE-ADJ/NOPB is sourced from the original manufacturer or authorized distributors?
All LM22675QMRE-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 LM22675QMRE-ADJ/NOPB meets industry standards.
7.What is the process for return or replacement of LM22675QMRE-ADJ/NOPB?
All LM22675QMRE-ADJ/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM22675QMRE-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 LM22675QMRE-ADJ/NOPB part is unused and in its original packaging.
Return procedure for LM22675QMRE-ADJ/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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