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Texas Instruments LM22670QMR-5.0/NOPB
- Part No.:
- LM22670QMR-5.0/NOPB
- Manufacturer:
- Texas Instruments
- Package:
- 8-PowerSOIC (0.154", 3.90mm Width)
- Datasheet:
-
LM22670QMR-5.0/NOPB.pdf
- Description:
- IC REG BUCK 5V 3A 8SOPWR
- Quantity:
- Payment:
- Shipping:
Inventory:3,976
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Product details
Overview
LM22670QMR-5.0/NOPB from Texas Instruments is a 42-V input, 3-A synchronous step-down DC/DC regulator in HSOP-8 PowerPAD™ package, featuring fixed 5.0 V output, 500 kHz switching frequency, ±1.5% feedback reference accuracy, and integrated bootstrap diode. It delivers high efficiency (>90%) in industrial power rails converting 12 V or 24 V inputs to stable 5 V for microcontroller core logic and peripheral interfaces.
For engineers reviewing the LM22670QMR-5.0/NOPB datasheet, LM22670QMR-5.0/NOPB pinout, LM22670QMR-5.0/NOPB application, or LM22670QMR-5.0/NOPB equivalent, key selection criteria include its 4.5–42 V wide input range, internal voltage-mode compensation, thermal shutdown protection, precision enable threshold (1.6 V typ), and compatibility with low-ESR ceramic output capacitors without external loop components.
Technical Context
The LM22670QMR-5.0/NOPB implements a voltage-mode PWM controller with input voltage feedforward to stabilize loop gain across input variations, enabling optimized transient response. Its internal Type III compensation is pre-tuned for fixed 5 V output operation and eliminates need for external compensation networks.
It integrates a 120 mΩ N-channel MOSFET switch (PFM package) and uses a bootstrap capacitor between BOOT and SW pins to drive the high-side gate. Minimum on-time (100 ns) and off-time (100 ns) constraints ensure reliable boot-cap recharge and support wide VIN/VOUT ratios up to 8.4:1 at 5 V output.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5 V to 42 V - supports direct connection to unregulated 12 V, 24 V, or 36 V industrial bus rails without pre-regulation. |
| Output Voltage | Fixed 5.0 V ±1.5% - eliminates external feedback divider, reduces BOM count, and ensures stable USB-compliant or MCU I/O rail voltage. |
| Max Output Current | 3 A continuous - sustains full load under worst-case thermal conditions with proper PCB copper area (1 in²). |
| Switching Frequency | 500 kHz default - enables use of compact 4.7 µH inductors and 22 µF ceramic output capacitors while maintaining good transient response. |
| RDS(ON) | 120 mΩ (PFM package) - limits conduction loss to <180 mW at 3 A, supporting >90% peak efficiency at mid-load. |
| Enable Threshold | 1.6 V typical with 0.6 V hysteresis - allows precise power sequencing using resistor dividers from upstream supplies without external comparators. |
| Quiescent Current | 3.4 mA typical - minimizes no-load power draw in always-on subsystems such as CAN transceivers or real-time clocks. |
Pinout & Package
LM22670QMR-5.0/NOPB is housed in an HSOP-8 PowerPAD™ package (4.89 mm × 3.90 mm) with exposed thermal pad soldered to PCB ground plane for enhanced heat dissipation (RθJA = 60°C/W with 1 in² copper).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 SW | Switch Node | High-current drain of internal N-MOSFET; connects to inductor and catch diode/capacitor node; requires short, low-inductance layout. |
| 2 VIN | Main Input Supply | Accepts 4.5–42 V; powers internal LDO, gate driver, and control circuitry; must be decoupled with ≥10 µF ceramic near pin. |
| 3 BOOT | Bootstrap Supply | Connects to SW via 10 nF ceramic capacitor; provides floating gate drive voltage for high-side MOSFET; critical for startup reliability. |
| 4 GND | Power Ground | Analog and power ground reference; tied to exposed pad; must be low-impedance connection to minimize noise coupling into FB path. |
| 5 RT/SYNC | Oscillator Control | Configures switching frequency: floating = 500 kHz, resistor-to-GND = 200–1000 kHz, external clock = synchronization mode. |
| 6 FB | Feedback Input | Monitors regulated 5 V output directly (no external divider); internal 1.285 V reference sets output; bias current <230 nA minimizes divider error. |
| 7 EN | Enable Control | Logic-level ON/OFF control; 1.6 V threshold with 0.6 V hysteresis; internal 6 µA pullup allows direct tie to VIN via 470 kΩ resistor. |
| 8 NC | No Connect | Not internally bonded; must remain unconnected per datasheet; no routing or thermal relief required. |
Key Features
| Feature | Design Value |
|---|---|
| Internally Compensated Voltage Mode Control | Eliminates external compensation network; reduces design time and component count while ensuring stability with standard 4.7 µH/22 µF output filter. |
| Integrated Bootstrap Diode | Removes need for external bootstrap diode; simplifies layout and improves reliability by eliminating discrete diode failure mode and reverse recovery loss. |
| Thermal Shutdown & Current Limit | Protects against sustained overload or ambient overheating; shuts down at 150°C junction temperature and limits peak switch current to 3.4–5.5 A. |
| Soft-Start (500 µs) | Prevents inrush current during power-up; avoids input rail sag and output overshoot without requiring external timing capacitor. |
| Stable with Low-ESR Ceramic Capacitors | Enables use of compact, high-reliability X7R/X5R MLCCs instead of bulkier electrolytics; reduces board space and extends lifetime in harsh environments. |
Applications
| Industrial PLC I/O Module | Automotive Body Control Unit |
|---|---|
|
Use Scenario: Powering isolated digital I/O drivers, ADC references, and RS-485 transceivers in DIN-rail mounted programmable logic controllers. IC Role / Device Role / Timing Role: Primary 5 V point-of-load regulator stepping down 24 V field bus; provides clean, low-noise supply independent of main system rail. Use Value: Wide 4.5–42 V input range accommodates brownout and surge conditions common in factory floor wiring; ±1.5% output accuracy ensures reliable logic-level translation and sensor interface integrity. |
Use Scenario: Generating 5 V for microcontroller peripherals (LIN, CAN, EEPROM, LED drivers) in automotive body electronics modules. IC Role / Device Role / Timing Role: Secondary buck regulator fed from 12 V battery rail; operates across –40°C to +125°C junction temperature range per AEC-Q100 Grade 1. Use Value: Precision enable threshold and hysteresis allow controlled wake-up/sleep sequencing with vehicle battery management systems; thermal shutdown prevents latch-up during under-hood hot-soak conditions. |
| Telecom Remote Radio Unit | Medical Diagnostic Sensor Interface |
|
Use Scenario: Converting -48 V telecom rectified input (via intermediate 12 V stage) to 5 V for FPGA configuration, memory, and Ethernet PHYs in outdoor base station radios. IC Role / Device Role / Timing Role: High-voltage tolerant buck converter accepting up to 42 V input; delivers regulated 5 V with fast transient response to handle bursty data traffic loads. Use Value: 500 kHz switching frequency enables small magnetics and low-profile layout; integrated soft-start prevents FPGA configuration corruption during cold start after power interruption. |
Use Scenario: Providing ultra-stable 5 V supply to precision analog front-ends (AFE), ADCs, and optical sensor bias circuits in portable ultrasound or ECG devices. IC Role / Device Role / Timing Role: Low-noise, low-drift power source for signal chain components; operates from single-cell Li-ion (4.2 V) or dual-cell (8.4 V) battery packs via boost-buck architecture. Use Value: Fixed 5 V output eliminates feedback resistor tolerance errors; ±1.5% reference accuracy maintains absolute ADC full-scale calibration over temperature and line variation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM22671QMR-5.0/NOPB | Same pinout and electrical specs, but rated for –40°C to +125°C with AEC-Q100 Grade 1 qualification; identical RDS(ON), efficiency, and features. | Required for automotive production; not necessary for industrial or telecom where LM22670QMR-5.0/NOPB's commercial-grade temp range suffices. | Select LM22671QMR-5.0/NOPB only when AEC-Q100 compliance is mandated; otherwise LM22670QMR-5.0/NOPB offers identical performance at lower cost. |
| TPS54340DDAR | 42 V, 3.5 A buck regulator with adjustable frequency (100–2500 kHz), higher RDS(ON) (110 mΩ), no integrated bootstrap diode, and different pinout (SOIC-8). | Supports wider frequency tuning and higher current, but requires external bootstrap diode and re-layout due to non-pin-compatible footprint. | Choose TPS54340DDAR only if 2500 kHz operation or >3 A peak load is needed; LM22670QMR-5.0/NOPB remains optimal for fixed 5 V, 500 kHz, drop-in replacement scenarios. |
Compared with LM22671QMR-5.0/NOPB, the LM22670QMR-5.0/NOPB omits automotive qualification but matches all electrical and thermal specs - making it ideal for cost-sensitive industrial designs. Versus TPS54340DDAR, it trades frequency flexibility for integration and layout simplicity, delivering faster time-to-market for fixed 5 V applications.
Availability
LM22670QMR-5.0/NOPB is available at Aetrix Electronics and suitable for industrial control, telecom power conversion, and embedded system power rails requiring stable component supply, long-term lifecycle assurance, and AEC-Q100-optional qualification.
Supply support for LM22670QMR-5.0/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 ICs, with decades of expertise in high-reliability power conversion solutions.
The LM22670 series belongs to TI's SIMPLE SWITCHER® family - designed specifically for ease-of-use in rugged DC/DC buck applications where minimal external components, internal compensation, and robust thermal performance are essential.
FAQ
What is the maximum input voltage rating for LM22670QMR-5.0/NOPB?
The LM22670QMR-5.0/NOPB has an absolute maximum input voltage rating of 43 V, with recommended operating range from 4.5 V to 42 V. Exceeding 42 V continuously risks violating safe operating area limits and may trigger thermal shutdown or reduce long-term reliability. The device is commonly used with 24 V and 36 V industrial rails where transient spikes remain within spec.
Does LM22670QMR-5.0/NOPB require external compensation components?
No, the LM22670QMR-5.0/NOPB features fully internal Type III voltage-mode compensation optimized for fixed 5 V output. This eliminates external resistors and capacitors traditionally needed for loop stability, reducing bill-of-materials count and layout complexity while ensuring robust performance with standard 4.7 µH inductors and 22 µF ceramic output capacitors.
Can LM22670QMR-5.0/NOPB synchronize to an external clock signal?
Yes, the LM22670QMR-5.0/NOPB supports external synchronization via its RT/SYNC pin. When driven with a clean square wave between 1.75 V and 3.5 V at frequencies from 500 kHz to 1 MHz, the regulator locks to the rising edge of the external clock. Synchronization must be established during startup; loss of clock causes automatic fallback to the internal 500 kHz oscillator.
What is the purpose of the NC pin on LM22670QMR-5.0/NOPB?
Pin 2 of the LM22670QMR-5.0/NOPB HSOP-8 package is designated NC (No Connect) and is not electrically bonded internally. It must remain unconnected on the PCB - no trace, pad, or thermal relief should be attached. Leaving it floating avoids unintended coupling or parasitic paths that could affect noise immunity or thermal performance of adjacent pins like VIN or GND.
How does the enable function work on LM22670QMR-5.0/NOPB?
The LM22670QMR-5.0/NOPB enable pin (EN) features a precision 1.6 V typical threshold with 0.6 V hysteresis. Pulling EN below 1.6 V disables the regulator, reducing quiescent current to 25 µA. An internal 6 µA pullup allows simple activation by connecting EN to VIN through a 470 kΩ resistor - a method validated for input voltages up to 42 V and widely used in power sequencing designs.
LM22670QMR-5.0/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- SIMPLE SWITCHER®
- Package/Case:
- 8-PowerSOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Fixed
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 4.5V
- Voltage - Input (Max):
- 42V
- Voltage - Output (Min/Fixed):
- 5V
- Voltage - Output (Max):
- -
- Current - Output:
- 3A
- 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
LM22670QMR-5.0/NOPB FAQ
1.How can I place an order for LM22670QMR-5.0/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM22670QMR-5.0/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 LM22670QMR-5.0/NOPB reliable?
The price and inventory of LM22670QMR-5.0/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM22670QMR-5.0/NOPB is usually 5 days.
3.What payment methods are accepted for LM22670QMR-5.0/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM22670QMR-5.0/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM22670QMR-5.0/NOPB?
LM22670QMR-5.0/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM22670QMR-5.0/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 LM22670QMR-5.0/NOPB?
For technical support, including LM22670QMR-5.0/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM22670QMR-5.0/NOPB requirements.
6.How does Aetrix verify that LM22670QMR-5.0/NOPB is sourced from the original manufacturer or authorized distributors?
All LM22670QMR-5.0/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 LM22670QMR-5.0/NOPB meets industry standards.
7.What is the process for return or replacement of LM22670QMR-5.0/NOPB?
All LM22670QMR-5.0/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM22670QMR-5.0/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 LM22670QMR-5.0/NOPB part is unused and in its original packaging.
Return procedure for LM22670QMR-5.0/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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