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Texas Instruments LM2853MH-3.0
- Part No.:
- LM2853MH-3.0
- Manufacturer:
- Texas Instruments
- Package:
- 14-PowerTSSOP (0.173", 4.40mm Width)
- Datasheet:
-
LM2853MH-3.0.pdf
- Description:
- IC REG BUCK 3V 3A 14HTSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,517
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Product details
Overview
LM2853MH-3.0 from Texas Instruments is a 3A, 550 kHz synchronous buck regulator in an exposed-pad HTSSOP-14 package, delivering a factory-programmed 3.0V output from 3.0V–5.5V input. It integrates internal 40 mΩ/32 mΩ MOSFETs, type-three compensation, and soft-start control-enabling compact, low-component-count point-of-load regulation for FPGA core supplies.
For engineers reviewing the LM2853MH-3.0 datasheet, LM2853MH-3.0 pinout, LM2853MH-3.0 application, or LM2853MH-3.0 equivalent, key selection criteria include its 3.0V fixed output tolerance (±0.675%), 12 µA shutdown current, thermal shutdown at 165°C, and compatibility with 4.7–6.8 µH inductors and 100–220 µF output capacitors per TI SNVS459.
Technical Context
The LM2853MH-3.0 implements voltage-mode PWM control with integrated high-side and low-side power MOSFETs, eliminating external switch drivers. Its internal type-three compensation network stabilizes the loop across recommended inductor/capacitor ranges without requiring external compensation components.
It supports split-rail operation (AVIN = 3.0–5.5V for control logic; PVIN = 1.5–5.5V for power stage), features UVLO with 2.47V rising threshold and 100 mV hysteresis, and includes switch-node protection that disables switching under no-load conditions until load is applied.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 3.0V ±0.675% (guaranteed over −40°C to +125°C junction temperature) |
| Max Output Current | 3A continuous; peak current limit set at 3.6–5A to prevent FET saturation during transients |
| Input Voltage Range | 3.0V–5.5V on AVIN; 1.5V–5.5V on PVIN - enables flexible rail partitioning for noise isolation |
| Switching Frequency | 550 kHz nominal (325–725 kHz range); enables compact magnetics and predictable EMI filtering |
| Quiescent Current | 12 µA in shutdown mode; 0.85–2 mA operating current - critical for battery-backed systems |
| Thermal Resistance | θJA = 38°C/W (MXA14A package); requires exposed pad soldered to PCB ground plane for rated performance |
| FET On-Resistance | High-side RDS(on) = 40–120 mΩ; low-side RDS(on) = 32–100 mΩ - defines conduction loss at full load |
Pinout & Package
Package: HTSSOP-14 with exposed thermal pad (TI package drawing PWP, JEDEC MO-153 variant MXA14A). The exposed pad must be soldered to a dedicated GND plane for thermal and electrical performance; it is internally connected to GND but not rated as primary ground path.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (AVIN) | Analog supply input | Powers control circuitry; must be ≥3.0V; decoupled locally with 1 µF ceramic capacitor |
| 2 (EN) | Enable input | Active-high; internally pulled up; 75% AVIN threshold ensures robust noise immunity |
| 3 (SGND) | Signal ground | Low-noise reference for error amplifier and feedback; separate from PGND to minimize noise coupling |
| 4 (SS) | Soft-start capacitor node | Charges to set output ramp rate; 2.2 nF yields ~3 ms startup; restricted to 1–50 nF range |
| 5 (NC) | No-connect | Must be tied to SGND; not internally floating - prevents parasitic coupling |
| 6,7 (PVIN) | Power input | Supplies high-current FETs; requires low-ESR bulk capacitor (e.g., 47 µF ceramic) placed adjacent to pins |
| 8,9 (SW) | Switch node | Connects to inductor; high dV/dt node - layout must minimize trace area to reduce EMI |
| 10,11 (PGND) | Power ground | Return path for high-current FET switching; must tie to SGND at single point near IC |
| 12,13 (NC) | No-connect | Both must be tied to PGND; maintains thermal and mechanical symmetry of exposed pad |
| 14 (SNS) | Voltage sense input | Resistor-divider feedback node; connects directly to load for accurate remote sensing |
Key Features
| Feature | Design Value |
|---|---|
| Integrated Power FETs | 40 mΩ high-side + 32 mΩ low-side MOSFETs eliminate external drivers and reduce BOM count |
| Type-Three Compensation | On-chip compensation eliminates external RC network - simplifies design and improves stability margin |
| Factory-Programmed Output | 3.0V output permanently set in EEPROM - no external resistors required for feedback divider |
| Split-Rail Input Support | Independent AVIN (3.0–5.5V) and PVIN (1.5–5.5V) inputs enable optimized noise isolation for sensitive analog sections |
| Thermal Shutdown Protection | 165°C trip with 10°C hysteresis prevents permanent damage during overload or poor heatsinking |
Applications
| FPGA Core Power Supply | DSP Local Regulation |
|---|---|
Use Scenario: Providing stable 3.0V rail to Xilinx Spartan-6 FPGA I/O banks with fast transient response. IC Role / Device Role / Timing Role: Primary DC-DC converter regulating VCCO; handles 0–2A load steps within 10 µs. Use Value: Internal 3.0V setting eliminates feedback resistor errors; 550 kHz switching allows <100 ns response to load transients. |
Use Scenario: Powering TI C6748 DSP core in industrial motor control gateway with strict ripple limits. IC Role / Device Role / Timing Role: Point-of-load regulator delivering clean 3.0V to DSP core; synchronized via external clock if needed. Use Value: 12 µA shutdown current extends battery life during sleep modes; exposed pad ensures ≤45°C rise at 3A. |
| Broadband Router SoC Supply | Industrial PLC I/O Module |
Use Scenario: Generating 3.0V for Broadcom BCM6368 SoC in DSLAM line cards with high ambient temperature. IC Role / Device Role / Timing Role: Main power stage for communication processor; operates continuously at 85°C ambient. Use Value: 38°C/W θJA and thermal shutdown ensure reliability; 3.0V tolerance meets SoC VDDIO spec (±3%). |
Use Scenario: Regulating 3.0V for isolated analog front-end ADCs in DIN-rail mounted PLC modules. IC Role / Device Role / Timing Role: Secondary regulator after isolated DC-DC; supplies precision reference and signal chain. Use Value: SGND/PGND separation minimizes digital noise coupling into analog ground; soft-start prevents inrush into downstream LDOs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS54302DDCR | 3A, 2.5–6V input, adjustable output (0.6–5.5V); 500 kHz fixed frequency; 29 µA quiescent current | Requires external feedback resistors; lacks factory-programmed 3.0V option; higher IQ reduces battery runtime | Choose when adjustable output or wider input range is needed; avoid if fixed 3.0V simplicity is prioritized |
| MP2333HGRT-Z | 3A, 4.5–28V input, 3.3V fixed output only; 500 kHz; 25 µA shutdown current; QFN-10 package | Higher minimum input (4.5V) excludes 3.3V system rails; 3.3V-only output incompatible with 3.0V requirement | Not suitable for direct replacement; consider only if redesigning for 3.3V and higher input voltage |
Compared with TPS54302DDCR and MP2333HGRT-Z, the LM2853MH-3.0 offers guaranteed 3.0V factory programming, lower shutdown current (12 µA), and split-rail input flexibility - making it optimal for space-constrained, low-IQ, fixed-output applications where layout simplicity and thermal performance are critical.
Availability
LM2853MH-3.0 is available at Aetrix Electronics and suitable for FPGA core power, DSP local regulation, broadband networking infrastructure, industrial PLC I/O modules, and telecom line card designs requiring stable component supply with long-term manufacturability.
Supply support for LM2853MH-3.0 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 series belongs to TI's SIMPLE SWITCHER® synchronous buck regulator family, designed specifically for low-voltage, high-efficiency point-of-load applications in communications, computing, and industrial systems where minimal external components and thermal robustness are essential.
FAQ
What is the output voltage tolerance of the LM2853MH-3.0 over temperature and line?
The LM2853MH-3.0 guarantees a 3.0V output with ±0.675% tolerance (±20.25 mV) across −40°C to +125°C junction temperature and full input range (3.5V–5.5V AVIN), as specified in the Electrical Characteristics table of SNVS459. This tight tolerance ensures reliable operation for 3.0V I/O standards without external trimming.
Can the LM2853MH-3.0 operate with AVIN and PVIN supplied from different sources?
Yes - the LM2853MH-3.0 supports true split-rail operation: AVIN powers the control circuitry (3.0–5.5V), while PVIN supplies the power FETs (1.5–5.5V). PVIN must never exceed AVIN. This architecture isolates noise-sensitive analog control from high-current switching paths, improving regulation accuracy in mixed-signal systems.
What is the recommended soft-start capacitor value for the LM2853MH-3.0?
Texas Instruments recommends a 2.2 nF ceramic capacitor on the SS pin for ~3 ms startup time, as validated in the Bill of Materials for 5V-to-3.3V conversion (SNVS459, p.10). The SS capacitor range is strictly limited to 1–50 nF; values outside this range may cause unstable startup or fault recovery behavior.
Does the LM2853MH-3.0 require external compensation components?
No - the LM2853MH-3.0 integrates a complete type-three compensation network. External compensation is neither required nor supported. Stability is ensured only when using inductors (4.7–6.8 µH) and output capacitors (100–220 µF, 70–150 mΩ ESR) within the ranges specified in Table 1 of SNVS459.
How should the exposed thermal pad of the LM2853MH-3.0 be connected on the PCB?
The exposed pad (EP) of the LM2853MH-3.0 must be soldered to a solid, low-impedance PCB ground plane covering ≥80% of the pad area. Though internally connected to GND, EP is not rated as the primary ground return path - SGND and PGND must still be tied together at a single point near the IC. Proper EP soldering reduces θJA to the rated 38°C/W.
LM2853MH-3.0 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- SIMPLE SWITCHER®
- Package/Case:
- 14-PowerTSSOP (0.173", 4.40mm Width)
- Packaging:
- Tube
- 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
LM2853MH-3.0 FAQ
1.How can I place an order for LM2853MH-3.0 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM2853MH-3.0 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-3.0 reliable?
The price and inventory of LM2853MH-3.0 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM2853MH-3.0 is usually 5 days.
3.What payment methods are accepted for LM2853MH-3.0?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM2853MH-3.0 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM2853MH-3.0?
LM2853MH-3.0 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM2853MH-3.0 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-3.0?
For technical support, including LM2853MH-3.0 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM2853MH-3.0 requirements.
6.How does Aetrix verify that LM2853MH-3.0 is sourced from the original manufacturer or authorized distributors?
All LM2853MH-3.0 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-3.0 meets industry standards.
7.What is the process for return or replacement of LM2853MH-3.0?
All LM2853MH-3.0 units undergo pre-shipment inspection (PSI). If there is an issue with LM2853MH-3.0, 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-3.0 part is unused and in its original packaging.
Return procedure for LM2853MH-3.0:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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