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Texas Instruments LM2853MH-1.0/NOPB
- Part No.:
- LM2853MH-1.0/NOPB
- Manufacturer:
- Texas Instruments
- Package:
- 14-PowerTSSOP (0.173", 4.40mm Width)
- Datasheet:
-
LM2853MH-1.0/NOPB.pdf
- Description:
- IC REG BUCK 1V 3A 14HTSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,408
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Product details
Overview
LM2853MH-1.0/NOPB from Texas Instruments is a 3-A, 550-kHz synchronous buck regulator with factory-programmed 1.0 V output, 3 V to 5.5 V input range, internal 40 mΩ/32 mΩ MOSFETs, and voltage-mode control. It delivers precise point-of-load regulation for FPGA/DSP core supplies in space-constrained industrial and networking systems.
For engineers reviewing the LM2853MH-1.0/NOPB datasheet, LM2853MH-1.0/NOPB pinout, LM2853MH-1.0/NOPB application, or LM2853MH-1.0/NOPB equivalent, key selection criteria include its fixed 1.0 V output, HTSSOP-14 thermal performance, soft-start programmability via external capacitor, and compatibility with low-ESR ceramic/tantalum output capacitors.
Technical Context
The LM2853MH-1.0/NOPB implements voltage-mode PWM control with integrated type-three compensation, eliminating external compensation components. Its dual-rail capability allows independent AVIN (3–5.5 V) and PVIN (1.5–5.5 V) supplies, enabling optimized power staging in multi-voltage systems.
Internal protection includes thermal shutdown at 165°C (10°C hysteresis), current-limit threshold of 3.6–5 A, and UVLO with 2.47 V rising threshold and 50–260 mV hysteresis. The device achieves up to 94% efficiency at 3 A load with 5 V input and 1.0 V output.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.0 V ±2.25% over –40°C to 125°C junction temperature |
| Input Voltage Range | 3 V to 5.5 V on AVIN; 1.5 V to 5.5 V on PVIN - supports split-rail operation |
| Max Output Current | 3 A continuous - determined by internal FET RDS(ON) (40 mΩ high-side, 32 mΩ low-side) and thermal design |
| Switching Frequency | 550 kHz nominal (325–725 kHz range) - enables compact magnetics and predictable EMI profile |
| Quiescent Current | 12 µA in shutdown - minimizes standby power loss in always-on systems |
| Thermal Resistance | RθJA = 38°C/W in HTSSOP-14 package - requires exposed pad soldered to PCB ground plane for rated performance |
| Soft-Start Time | Programmable via external capacitor on SS pin (1–50 nF range) - prevents inrush current during startup |
Pinout & Package
LM2853MH-1.0/NOPB uses a 14-pin HTSSOP (PWP) package with 5.00 mm × 4.40 mm body size and thermally enhanced exposed pad (EP), which must be soldered to a PCB ground plane but not used as primary GND connection.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (AVIN) | Control circuit supply | Provides bias for internal logic and error amplifier; must be ≥3 V for full functionality |
| 2 (EN) | Enable input | Active-high enable with internal 1.5 µA pullup; drives high to activate regulator |
| 3 (SGND) | Analog ground | Low-noise reference for feedback and control circuits; separate from power ground |
| 4 (SS) | Soft-start control | Connects to external capacitor to set controlled ramp-up time for output voltage |
| 5 (NC) | No connect | Must be tied to ground per datasheet; no internal connection |
| 6–7 (PVIN) | Power switch supply | High-current input for internal FETs; accepts lower voltage than AVIN in split-rail configurations |
| 8–9 (SW) | Switch node | Drives external inductor; carries high di/dt switching current - requires short, wide PCB trace |
| 10–11 (PGND) | Power ground | Return path for high-current FETs and inductor; must tie to SGND at single point near IC |
| 12–13 (NC) | No connect | Both pins must be tied to ground; no internal function |
| 14 (SNS) | Voltage sense input | Monitors regulated output via external resistor divider; precision feedback path for 1.0 V output |
| EP | Exposed thermal pad | Internally connected to GND; mandatory soldering to PCB ground plane for thermal and electrical integrity |
Key Features
| Feature | Design Value |
|---|---|
| Factory-programmed output | 1.0 V output set permanently in EEPROM - eliminates external feedback resistors and calibration effort |
| Integrated power stage | 40 mΩ P-channel + 32 mΩ N-channel MOSFETs - reduces BOM count and layout complexity vs. controller-only solutions |
| Type-three compensation | Fully internal - removes need for external compensation network while maintaining stability across recommended LO/CO ranges |
| Low shutdown current | 12 µA typical - enables energy-sensitive applications such as battery-backed subsystems or always-on monitoring nodes |
| Split-rail operation support | Independent AVIN/PVIN supplies - allows use of lower-voltage PVIN (e.g., 3.3 V) while maintaining 5 V AVIN for robust control logic |
Applications
| Baseband Processor Core Supply | FPGA I/O Bank Regulation |
|---|---|
|
Use Scenario: Powering ARM-based baseband processors in 4G/5G small cells where thermal density and transient response are critical. IC Role / Device Role / Timing Role: Primary 1.0 V core regulator delivering up to 3 A with <2.25% output tolerance across temperature and load. Use Value: Factory-set 1.0 V eliminates feedback resistor placement errors and ensures consistent core voltage across production batches. |
Use Scenario: Providing clean, stable 1.0 V supply to FPGA I/O banks interfacing with high-speed SerDes transceivers. IC Role / Device Role / Timing Role: Local point-of-load regulator placed adjacent to FPGA package to minimize IR drop and noise coupling. Use Value: 550-kHz switching frequency enables use of small 4.7 µH inductors and 120–220 µF low-ESR output capacitors for tight layout constraints. |
| Industrial PLC Digital I/O Module | Optical Line Terminal (OLT) Control Plane |
|
Use Scenario: Regulating 1.0 V for microcontroller and interface ICs in DIN-rail mounted PLC modules operating from 24 V DC input. IC Role / Device Role / Timing Role: Secondary-stage buck converter fed from intermediate 5 V rail, providing isolated low-noise core power. Use Value: HTSSOP-14 exposed pad enables reliable thermal dissipation in convection-cooled enclosures without heatsinks. |
Use Scenario: Powering control-plane ASICs in passive optical network OLT chassis where EMI compliance and long-term reliability are mandated. IC Role / Device Role / Timing Role: Fixed-output buck regulator with soft-start programmability to coordinate power sequencing with upstream 3.3 V rails. Use Value: Internal UVLO (2.47 V) and thermal shutdown (165°C) ensure fail-safe behavior under brownout or airflow failure conditions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS54302DDCR | 3-A, 2.7–6 V input, adjustable output (0.6–5.5 V) via external resistors; 500-kHz fixed frequency; 25 µA shutdown current | Requires external feedback network; lacks factory-programmed 1.0 V option; better light-load efficiency in Eco-mode | Select when adjustable output or lower quiescent current in light-load operation is required; board redesign needed for feedback layout |
| MP2333HG-1.0-Z | 3-A, 4.5–28 V input, fixed 1.0 V output; 500-kHz frequency; 22 µA shutdown current; QFN-10 package (3×3 mm) | Wider input range but higher minimum input (4.5 V); smaller footprint but lower thermal performance (RθJA ≈ 60°C/W) | Select for space-constrained designs with ≥4.5 V input; verify thermal margin at 3 A in ambient >60°C |
Compared with TPS54302DDCR and MP2333HG-1.0-Z, LM2853MH-1.0/NOPB offers guaranteed 1.0 V accuracy without external resistors and superior thermal resistance (38°C/W) in its HTSSOP package - making it optimal for thermally demanding, fixed-output applications where layout simplicity and production consistency are prioritized.
Availability
LM2853MH-1.0/NOPB is available at Aetrix Electronics and suitable for industrial PLCs, 5G baseband units, FPGA-based test equipment, and optical network terminals requiring stable component supply and long-lifecycle support.
Supply support for LM2853MH-1.0/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 company headquartered in Dallas, Texas, designing and manufacturing analog and embedded processing chips for industrial, automotive, and communications markets.
The LM2853 product line delivers highly integrated, thermally optimized synchronous buck regulators targeting space- and reliability-critical point-of-load applications in networking infrastructure and embedded computing.
FAQ
What is the output voltage tolerance of LM2853MH-1.0/NOPB over temperature?
The LM2853MH-1.0/NOPB maintains a 1.0 V output with ±2.25% tolerance (0.9775 V to 1.0225 V) across the full operating junction temperature range of –40°C to 125°C, as specified in the Electrical Characteristics table under VOUT parameter for the 1 V option.
Can LM2853MH-1.0/NOPB operate with separate AVIN and PVIN supplies?
Yes, LM2853MH-1.0/NOPB supports split-rail operation: AVIN (3–5.5 V) powers the control circuitry, while PVIN (1.5–5.5 V) supplies the power FETs. PVIN must not exceed AVIN, and for PVIN < 3.3 V, output filter component recommendations for 3.3 V apply per datasheet Section 8.1.9.
What is the recommended soft-start capacitor value for LM2853MH-1.0/NOPB?
The LM2853MH-1.0/NOPB soft-start capacitor (CSS) should be between 1 nF and 50 nF. For a typical 3 ms startup time, a 2.2 nF ceramic capacitor is recommended, calculated using the internal 450 kΩ DAC resistor and three RC time constants to reach 95% of final output voltage.
Does LM2853MH-1.0/NOPB require external compensation components?
No, LM2853MH-1.0/NOPB integrates a complete type-three compensation network. This eliminates external compensation components and simplifies design, provided output filter inductors (4.7–6.8 µH) and capacitors (120–220 µF, 50–150 mΩ ESR) stay within the ranges specified in Table 1 of the datasheet.
What thermal considerations apply to LM2853MH-1.0/NOPB in HTSSOP-14 package?
LM2853MH-1.0/NOPB has a junction-to-ambient thermal resistance (RθJA) of 38°C/W in the HTSSOP-14 (PWP) package. To achieve this rating, the exposed pad (EP) must be fully soldered to a PCB ground plane with adequate copper area; insufficient thermal vias or pad coverage will degrade thermal performance and limit maximum load current.
LM2853MH-1.0/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- SIMPLE SWITCHER®
- Package/Case:
- 14-PowerTSSOP (0.173", 4.40mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- 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):
- 1V
- 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
LM2853MH-1.0/NOPB FAQ
1.How can I place an order for LM2853MH-1.0/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM2853MH-1.0/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 LM2853MH-1.0/NOPB reliable?
The price and inventory of LM2853MH-1.0/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM2853MH-1.0/NOPB is usually 5 days.
3.What payment methods are accepted for LM2853MH-1.0/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM2853MH-1.0/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM2853MH-1.0/NOPB?
LM2853MH-1.0/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM2853MH-1.0/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 LM2853MH-1.0/NOPB?
For technical support, including LM2853MH-1.0/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM2853MH-1.0/NOPB requirements.
6.How does Aetrix verify that LM2853MH-1.0/NOPB is sourced from the original manufacturer or authorized distributors?
All LM2853MH-1.0/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 LM2853MH-1.0/NOPB meets industry standards.
7.What is the process for return or replacement of LM2853MH-1.0/NOPB?
All LM2853MH-1.0/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM2853MH-1.0/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 LM2853MH-1.0/NOPB part is unused and in its original packaging.
Return procedure for LM2853MH-1.0/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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