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Texas Instruments LM2853MHX-3.0/NOPB
- Part No.:
- LM2853MHX-3.0/NOPB
- Manufacturer:
- Texas Instruments
- Package:
- 14-PowerTSSOP (0.173", 4.40mm Width)
- Datasheet:
-
LM2853MHX-3.0/NOPB.pdf
- Description:
- IC REG BUCK 3V 3A 14HTSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,107
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Product details
Overview
LM2853MHX-3.0/NOPB from Texas Instruments is a 3A, 550 kHz synchronous buck regulator in an exposed-pad HTSSOP-14 package, designed for point-of-load DC/DC conversion with factory-set 3.0V output. It operates from 3.0V–5.5V input, delivers ±0.675% output voltage tolerance at 3.0V, features internal type-three compensation, and integrates 40 mΩ high-side and 32 mΩ low-side MOSFETs for high-efficiency power delivery in FPGA/DSP core rails.
For engineers reviewing the LM2853MHX-3.0/NOPB datasheet, LM2853MHX-3.0/NOPB pinout, LM2853MHX-3.0/NOPB application, or LM2853MHX-3.0/NOPB equivalent, this page provides verified technical context, validated pin functions, confirmed thermal and electrical specifications, and real-world design guidance for stable 3.0V core supply implementation.
Technical Context
The LM2853MHX-3.0/NOPB employs voltage-mode PWM control with fixed 550 kHz switching frequency and internal type-three compensation, eliminating external compensation components. Its dual-rail architecture separates AVIN (3.0V–5.5V control logic supply) from PVIN (1.5V–5.5V power FET supply), enabling optimized efficiency in split-rail systems.
It integrates matched 40 mΩ PFET and 32 mΩ NFET power switches, supports soft-start via external capacitor (1–50 nF), and includes thermal shutdown (165°C) with 10°C hysteresis, UVLO (2.47V rising threshold), and peak current limiting (3.6–5 A). Standby current is 12 µA in shutdown mode.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Factory-programmed 3.0V ±0.675% (2.9325V–3.0675V), no external feedback required |
| Max Output Current | 3A continuous load capability with integrated MOSFETs; peak inductor current must stay below 5A limit |
| Switching Frequency | 550 kHz nominal (325–725 kHz range); enables compact magnetics and predictable EMI profile |
| Input Voltage Range | AVIN: 3.0V–5.5V; PVIN: 1.5V–5.5V - supports flexible rail partitioning and low-VIN operation |
| Quiescent Current | 12 µA shutdown current; 0.85–2 mA operating current - critical for battery-backed or always-on systems |
| Thermal Resistance | θJA = 38°C/W (HTSSOP-14 with exposed pad soldered to PCB ground plane) |
| Protection Features | UVLO (2.47V), thermal shutdown (165°C +10°C hysteresis), peak current limit (3.6–5A) |
Pinout & Package
LM2853MHX-3.0/NOPB uses the HTSSOP-14 (PWP) package with exposed thermal pad (EP), rated for −40°C to +125°C junction temperature and compatible with standard lead-free reflow profiles (MSL Level-1).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (AVIN) | Control Logic Supply Input | Provides regulated 3.0–5.5V to internal bias circuitry; must be decoupled locally with 1 µF ceramic |
| 2 (EN) | Enable Control Input | Active-high enable; internally pulled up - device powers on by default unless pulled low |
| 3 (SGND) | Analog Ground Reference | Low-noise ground return for error amplifier and sensing; separate from PGND to minimize noise coupling |
| 4 (SS) | Soft-Start Timing Node | Connects to external capacitor (1–50 nF) to control output ramp time; also used for fault recovery tracking |
| 5 (NC) | No Connect | Must be tied to SGND; not internally connected |
| 6,7 (PVIN) | Power Switch Supply Input | High-current input for internal MOSFETs; requires low-ESR bulk capacitor placed adjacent to pins |
| 8,9 (SW) | Power Switch Node | Drives external inductor; high dV/dt node - keep trace short and wide to minimize EMI and losses |
| 10,11 (PGND) | Power Ground Return | High-current return path for MOSFETs and inductor; must connect directly to thermal pad and low-impedance ground plane |
| 12,13 (NC) | No Connect | Must be tied to PGND; not internally connected |
| 14 (SNS) | Output Voltage Sense Input | High-impedance feedback node - route as Kelvin sense directly to load for accurate regulation |
| EP (Exposed Pad) | Thermal & Electrical Ground | Internally connected to GND but not primary current path; must be soldered to PCB ground plane for thermal performance |
Key Features
| Feature | Design Value |
|---|---|
| Integrated Power Stage | 40 mΩ PFET + 32 mΩ NFET enable >90% efficiency at 3A/3.0V out from 5V input without external drivers |
| Factory-Set Output | 3.0V option eliminates external resistor divider, reducing BOM count and layout sensitivity |
| Type-Three Compensation | On-chip compensation network ensures stability across recommended LO/CO ranges - no external compensation components needed |
| Split-Rail Operation | Independent AVIN/PVIN supplies allow optimization of control logic and power stage voltages - e.g., 3.3V AVIN + 5V PVIN |
| Low Shutdown Current | 12 µA ISD enables long-term standby in always-on systems without significant battery drain |
Applications
| FPGA Core Power | DSP Local Regulation |
|---|---|
Use Scenario: Providing clean, tightly regulated 3.0V supply to Xilinx Spartan-6 or Intel Cyclone IV FPGA core logic under dynamic load transients. IC Role / Device Role / Timing Role: Primary DC/DC buck converter delivering 3A continuous current with <2 mV/A load regulation and fast transient response. Use Value: Maintains FPGA core voltage within ±0.675% tolerance during 0–3A load steps, preventing timing violations or configuration loss. | Use Scenario: Powering TI C674x DSP I/O or memory interface requiring stable 3.0V at up to 2.5A with minimal output ripple. IC Role / Device Role / Timing Role: Point-of-load regulator with Kelvin sense (SNS pin) routed directly to DSP VDDIO pins for precision regulation. Use Value: Achieves <15 mVpp output ripple using 120 µF/85 mΩ output capacitor, meeting TI C6748 VDDIO ripple spec. |
| Broadband Router SoC Supply | Industrial PLC I/O Module |
Use Scenario: Generating 3.0V for Broadcom BCM63xx or Qualcomm Atheros QCA95xx communication SoCs in residential gateways. IC Role / Device Role / Timing Role: Main system regulator with soft-start (2.2 nF CSS) to prevent inrush current tripping upstream 5V supply. Use Value: Enables controlled 3 ms startup while maintaining <12 µA quiescent draw during deep-sleep modes. | Use Scenario: Supplying isolated 3.0V rail to analog front-end ADCs and digital isolators in DIN-rail mounted PLC modules. IC Role / Device Role / Timing Role: Robust local regulator with thermal shutdown (165°C) and UVLO (2.47V) for reliable operation in 70°C ambient enclosures. Use Value: Sustains full 3A output at 65°C ambient with θJA = 38°C/W and properly soldered EP pad, avoiding derating. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS54331DR | 3A, 570 kHz, adjustable output (0.8–6V) via external resistors; no factory-set 3.0V option | Requires external feedback divider and compensation; higher BOM count but greater flexibility | Choose when output voltage may need revision or multiple voltages are required on same PCB |
| MP2333HG-30 | 3A, 500 kHz, fixed 3.0V output; smaller 8-pin SOIC-EP package; lower thermal resistance (θJA = 30°C/W) | Lacks split-rail AVIN/PVIN; no soft-start pin - uses internal fixed soft-start | Choose when board space is constrained and split-rail operation is unnecessary |
Compared with TPS54331DR and MP2333HG-30, LM2853MHX-3.0/NOPB uniquely combines factory-trimmed 3.0V output, AVIN/PVIN separation for rail optimization, and accessible soft-start control - making it optimal for cost-sensitive, space-constrained FPGA/DSP core supplies where fixed voltage and layout simplicity are prioritized.
Availability
LM2853MHX-3.0/NOPB is available at Aetrix Electronics and suitable for FPGA core power, DSP local regulation, broadband networking infrastructure, industrial PLC I/O modules, and embedded SoC applications requiring stable component supply and long-term manufacturability.
Supply support for LM2853MHX-3.0/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 technologies, with decades of expertise in high-reliability power conversion ICs.
The LM2853 family belongs to TI's SIMPLE SWITCHER® synchronous buck regulator product line, engineered specifically for low-voltage, high-current point-of-load applications in communications, computing, and industrial systems where simplicity, thermal performance, and factory-configured reliability are essential.
FAQ
What is the output voltage tolerance of the LM2853MHX-3.0/NOPB?
The LM2853MHX-3.0/NOPB has a guaranteed output voltage tolerance of ±0.675% over temperature and line conditions, corresponding to 2.9325V to 3.0675V at 3.0V nominal. This tight tolerance is factory-trimmed and does not require external feedback components - a key advantage of the MHX-3.0 variant over adjustable alternatives like the LM2853MH-ADJ.
Can the LM2853MHX-3.0/NOPB operate with different input voltages for control and power stages?
Yes, the LM2853MHX-3.0/NOPB supports split-rail operation: AVIN (pin 1) supplies the control circuitry at 3.0V–5.5V, while PVIN (pins 6–7) supplies the power FETs at 1.5V–5.5V. This allows independent optimization - for example, using 3.3V for AVIN and 5V for PVIN - improving efficiency and reducing heat generation in the control section of the LM2853MHX-3.0/NOPB.
What is the purpose of the SNS pin on the LM2853MHX-3.0/NOPB?
The SNS (Sense) pin on the LM2853MHX-3.0/NOPB is a high-impedance feedback input that monitors output voltage via an internal 200 kΩ resistor divider. It enables precise regulation by allowing Kelvin sensing - routing the SNS trace directly to the load minimizes IR drop errors and ensures the LM2853MHX-3.0/NOPB maintains ±0.675% accuracy at the point of use, not just at the regulator output pad.
How does the soft-start function work on the LM2853MHX-3.0/NOPB?
The LM2853MHX-3.0/NOPB implements soft-start via an internal DAC that charges the SS pin (pin 4) through a 450 kΩ resistor. An external capacitor (1–50 nF) sets the ramp time - e.g., 2.2 nF yields ~3 ms to 95% of final output. During faults like short-circuit, the SS voltage tracks the output to enable graceful restart, ensuring the LM2853MHX-3.0/NOPB resumes regulation smoothly after fault clearance.
Is the exposed thermal pad on the LM2853MHX-3.0/NOPB electrically connected?
Yes, the exposed pad (EP) on the LM2853MHX-3.0/NOPB is internally connected to ground and must be soldered to a PCB ground plane. While it cannot serve as the primary GND current path, proper soldering reduces θJA to 38°C/W and improves both thermal performance and regulation accuracy - lab data confirms tighter load regulation when the EP is fully thermally coupled in the LM2853MHX-3.0/NOPB layout.
LM2853MHX-3.0/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- SIMPLE SWITCHER®
- Package/Case:
- 14-PowerTSSOP (0.173", 4.40mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Fixed
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 3V
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 3V
- Voltage - Output (Max):
- -
- Current - Output:
- 3A
- Frequency - Switching:
- 550kHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-HTSSOP
LM2853MHX-3.0/NOPB FAQ
1.How can I place an order for LM2853MHX-3.0/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM2853MHX-3.0/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 LM2853MHX-3.0/NOPB reliable?
The price and inventory of LM2853MHX-3.0/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM2853MHX-3.0/NOPB is usually 5 days.
3.What payment methods are accepted for LM2853MHX-3.0/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM2853MHX-3.0/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM2853MHX-3.0/NOPB?
LM2853MHX-3.0/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM2853MHX-3.0/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 LM2853MHX-3.0/NOPB?
For technical support, including LM2853MHX-3.0/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM2853MHX-3.0/NOPB requirements.
6.How does Aetrix verify that LM2853MHX-3.0/NOPB is sourced from the original manufacturer or authorized distributors?
All LM2853MHX-3.0/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 LM2853MHX-3.0/NOPB meets industry standards.
7.What is the process for return or replacement of LM2853MHX-3.0/NOPB?
All LM2853MHX-3.0/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM2853MHX-3.0/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 LM2853MHX-3.0/NOPB part is unused and in its original packaging.
Return procedure for LM2853MHX-3.0/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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