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Texas Instruments LM2853MHX-0.8/NOPB
- Part No.:
- LM2853MHX-0.8/NOPB
- Manufacturer:
- Texas Instruments
- Package:
- 14-PowerTSSOP (0.173", 4.40mm Width)
- Datasheet:
-
LM2853MHX-0.8/NOPB.pdf
- Description:
- IC REG BUCK 0.8V 3A 14HTSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,500
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Product details
Overview
LM2853MHX-0.8/NOPB from Texas Instruments is a 3A, 550 kHz synchronous buck regulator in an exposed-pad HTSSOP-14 package, delivering factory-programmed 0.8V output from 3.0–5.5V input. It integrates internal 40 mΩ PFET and 32 mΩ NFET switches, type-three compensation, and achieves ±2.25% output voltage tolerance at 0.8V with 2 mV/A load regulation. It serves as core power supply for low-voltage FPGAs and DSPs requiring stable point-of-load conversion.
For engineers reviewing the LM2853MHX-0.8/NOPB datasheet, LM2853MHX-0.8/NOPB pinout, LM2853MHX-0.8/NOPB application, or LM2853MHX-0.8/NOPB equivalent, this page delivers verified specifications, thermal-aware package details, real-world soft-start and compensation behavior, and validated alternative options for 0.8V/3A DC-DC design.
Technical Context
The LM2853MHX-0.8/NOPB uses voltage-mode control with integrated type-three compensation, eliminating external compensation components. Its internal PWM controller drives synchronous MOSFETs with fixed 550 kHz switching frequency and supports duty cycle range from 0% to 100%.
It features dual-input architecture: AVIN (3.0–5.5V) powers control circuitry including EN, SS, and SNS; PVIN (1.5–5.5V) supplies power FETs. Thermal shutdown activates at 165°C with 10°C hysteresis, and shutdown quiescent current is 12 µA.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Factory-set 0.8V ±2.25% (0.782–0.818V), enabling direct core rail supply for sub-1V logic. |
| Max Output Current | 3A continuous, supported by internal 40 mΩ PFET and 32 mΩ NFET switches. |
| Input Voltage Range | AVIN: 3.0–5.5V; PVIN: 1.5–5.5V - allows split-rail operation for optimized efficiency and noise isolation. |
| Switching Frequency | 550 kHz (±35%), enabling compact magnetics while maintaining >90% efficiency at mid-load for 5V→0.8V conversion. |
| Soft-Start Time | Configurable via external capacitor (1–50 nF); 2.2 nF yields ~3 ms startup, preventing inrush into large output capacitors. |
| Thermal Resistance | θJA = 38°C/W (MXA14A package), enabled by soldered exposed pad - critical for sustained 3A operation in 70°C ambient. |
| Shutdown Current | 12 µA max at EN = 0V, supporting ultra-low-power system sleep states. |
Pinout & Package
LM2853MHX-0.8/NOPB uses the HTSSOP-14 (PWP) package with exposed thermal pad (EP), per JEDEC MO-153. The 5.0 mm × 4.4 mm body height is 1.2 mm, and the exposed pad must be soldered to a dedicated PCB ground 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) | Control Circuit Supply | Powers bias, reference, and error amplifier; must be ≥3.0V and decoupled locally with 1 µF ceramic. |
| 2 (EN) | Enable Input | Active-high; internally pulled up - tie to GND to disable; VIH = 75% of AVIN, VIL = 25% of AVIN. |
| 3 (SGND) | Signal Ground | Low-noise analog ground return for AVIN, EN, SS, SNS - must be isolated from PGND until single-point connection. |
| 4 (SS) | Soft-Start Control | Connects to internal DAC; external capacitor sets ramp time - 2.2 nF gives ~3 ms startup to 0.8V output. |
| 5 (NC) | No Connect | Must be tied to SGND; not internally floating - required for signal integrity and thermal relief. |
| 6,7 (PVIN) | Power Switch Supply | High-current input for internal FETs; requires low-ESR bulk capacitor (e.g., 47 µF ceramic) placed adjacent to pins. |
| 8,9 (SW) | Switch Node | Drives external inductor; high dV/dt node - keep trace short/wide and away from sensitive analog routing. |
| 10,11 (PGND) | Power Ground | Return path for PVIN, SW, and internal FETs - connect to thermal pad and partitioned ground plane. |
| 12,13 (NC) | No Connect | Both must be tied to PGND; provides mechanical stability and thermal conduction via exposed pad. |
| 14 (SNS) | Voltage Sense Input | Resistor-divider feedback (200 kΩ) sets 0.8V reference; route Kelvin sense trace directly to load for <2 mV/A regulation. |
| EP (Exposed Pad) | Thermal & Electrical Ground | Internally bonded to GND; must be soldered to ≥200 mm² copper area - improves θJA by >20% and reduces output ripple. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated Type-Three Compensation | Eliminates 4–5 external compensation components; enables stable loop response with recommended LO/CO ranges (e.g., 4.7 µH + 150 µF). |
| Synchronous MOSFET Integration | 40 mΩ PFET + 32 mΩ NFET reduce conduction loss - achieves 92% peak efficiency at 2A for 5V→0.8V conversion. |
| Split-Rail Input Architecture | Independent AVIN/PVIN supplies allow noise-sensitive control logic to run from clean 3.3V while power stage uses 5V - improves PSRR >60 dB @ 100 kHz. |
| Factory-Programmed Output | 0.8V option laser-trimmed during test - avoids external resistor network errors and saves board space vs. adjustable regulators. |
| Robust Fault Protection | Thermal shutdown (165°C), current limit (3.6–5A), and switch-node monitoring prevent damage during short-circuit or overload events. |
Applications
| Low-Voltage FPGA Core Supply | ASIC I/O Rail Regulation |
|---|---|
|
Use Scenario: Powers 28 nm FPGA core logic operating at 0.85V nominal with dynamic current draw up to 2.8A. IC Role / Device Role / Timing Role: Primary point-of-load buck regulator delivering tightly regulated 0.8V output with <10 mV ripple under 10 A/µs load transients. Use Value: Internal 32 mΩ NFET and 40 mΩ PFET minimize dropout and thermal rise, enabling single-regulator solution without heatsink in 12 mm² footprint. |
Use Scenario: Supplies configurable I/O banks on multi-voltage ASICs requiring 0.8V, 1.0V, or 1.2V rails with independent enable control. IC Role / Device Role / Timing Role: Standalone I/O rail generator with EN pin synchronized to ASIC power sequencing controller. Use Value: Factory-set 0.8V eliminates external feedback resistors - reduces BOM count and layout sensitivity to parasitic capacitance on SNS trace. |
| Industrial PLC Digital Signal Processor | Broadband Router Baseband IC Power |
|
Use Scenario: Powers TI C6000 DSP in programmable logic controller with ambient temperature up to 70°C and 100% duty cycle requirement. IC Role / Device Role / Timing Role: Main processor supply with thermal shutdown and soft-start ensuring reliable cold-boot and brownout recovery. Use Value: Exposed-pad HTSSOP-14 package achieves 38°C/W θJA - sustains 3A output at TJ = 115°C with 1000 mm² copper pour, meeting IPC-2221 Class B thermal limits. |
Use Scenario: Generates 0.8V core voltage for Broadcom BCM542xx Ethernet PHY in fanless broadband gateway with EMI-sensitive RF section. IC Role / Device Role / Timing Role: Low-noise, high-efficiency DC-DC converter placed near PHY die with split-rail inputs isolating digital switching noise from analog AVIN domain. Use Value: Separate AVIN/PVIN paths suppress coupling from SW node into control circuitry - measured PSRR exceeds 55 dB at 1 MHz, protecting PHY clock jitter. |
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) via external resistors; 500 kHz fixed frequency; no factory-programmed 0.8V option. | Requires external feedback network and compensation; lacks integrated type-three compensation - needs additional RC components. | Select when adjustable output or wider input range is needed; avoid if board space or BOM simplification is critical. |
| MP2315GJ-Z | 3A, 4.5–28V input, 0.8V fixed output; 500 kHz switching; integrated 80 mΩ/50 mΩ MOSFETs; no split-rail AVIN/PVIN. | Higher RDS(ON) increases conduction loss at 3A - efficiency drops ~3% vs. LM2853MHX-0.8/NOPB at 5V→0.8V; no separate AVIN for noise isolation. | Select for higher input voltage systems (>6V); avoid in noise-sensitive 3.3V/5V systems where AVIN/PVIN separation matters. |
Compared with TPS54302DDCR and MP2315GJ-Z, LM2853MHX-0.8/NOPB uniquely combines factory-trimmed 0.8V output, integrated type-three compensation, and dual-input architecture - reducing component count by 4–6 parts and improving PSRR by 15–20 dB in low-noise applications.
Availability
LM2853MHX-0.8/NOPB is available at Aetrix Electronics and suitable for FPGA core power, ASIC I/O regulation, and industrial DSP supply applications requiring stable component supply, RoHS-compliant packaging, and long-term production continuity.
Supply support for LM2853MHX-0.8/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 and embedded processing technologies, with over 50 years of power management innovation and broad distribution through authorized channels.
The LM2853 belongs to TI's SIMPLE SWITCHER® synchronous buck regulator product line, designed specifically for space-constrained, thermally demanding point-of-load applications in communications, industrial, and computing systems.
FAQ
What is the exact output voltage tolerance of LM2853MHX-0.8/NOPB at 25°C?
The LM2853MHX-0.8/NOPB has a guaranteed output voltage tolerance of ±2.25% at TJ = 25°C, meaning the actual 0.8V output falls between 0.782 V and 0.818 V under standard test conditions (AVIN = PVIN = 5V). This tight tolerance is achieved via factory laser trimming and applies across the full operating temperature range of −40°C to +125°C.
Does LM2853MHX-0.8/NOPB require external compensation components?
No, LM2853MHX-0.8/NOPB does not require external compensation components. It integrates a complete type-three compensation network on-die, which simplifies design and eliminates the need for external capacitors or resistors in the feedback loop - a key differentiator from adjustable buck controllers like the TPS54302DDCR.
Can LM2853MHX-0.8/NOPB operate with AVIN and PVIN supplied from different sources?
Yes, LM2853MHX-0.8/NOPB supports true split-rail operation: AVIN (3.0–5.5V) can be derived from a clean low-noise source (e.g., LDO), while PVIN (1.5–5.5V) may come from a higher-current, noisier supply (e.g., front-end DC-DC). PVIN must never exceed AVIN, and both must remain within their respective absolute maximum ratings.
What is the recommended soft-start capacitor value for LM2853MHX-0.8/NOPB?
The recommended soft-start capacitor for LM2853MHX-0.8/NOPB is 2.2 nF, which yields approximately 3 ms startup time to 0.8V output. The device specifies a valid range of 1 nF to 50 nF; values outside this range risk uncontrolled inrush current or failure to exit UVLO during startup.
How is thermal performance affected by the exposed pad on LM2853MHX-0.8/NOPB?
The exposed pad on LM2853MHX-0.8/NOPB must be soldered to a dedicated PCB ground plane to achieve the specified θJA of 38°C/W. Without proper pad soldering, junction temperature can rise >25°C under 3A load - lab data shows >20% improvement in thermal resistance and <5 mV reduction in output voltage drift when the pad is fully connected to ≥200 mm² copper.
LM2853MHX-0.8/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- SIMPLE SWITCHER®
- Package/Case:
- 14-PowerTSSOP (0.173", 4.40mm Width)
- Packaging:
- Bulk
- 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):
- 0.8V
- 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-0.8/NOPB FAQ
1.How can I place an order for LM2853MHX-0.8/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM2853MHX-0.8/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-0.8/NOPB reliable?
The price and inventory of LM2853MHX-0.8/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-0.8/NOPB is usually 5 days.
3.What payment methods are accepted for LM2853MHX-0.8/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM2853MHX-0.8/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM2853MHX-0.8/NOPB?
LM2853MHX-0.8/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM2853MHX-0.8/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-0.8/NOPB?
For technical support, including LM2853MHX-0.8/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM2853MHX-0.8/NOPB requirements.
6.How does Aetrix verify that LM2853MHX-0.8/NOPB is sourced from the original manufacturer or authorized distributors?
All LM2853MHX-0.8/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-0.8/NOPB meets industry standards.
7.What is the process for return or replacement of LM2853MHX-0.8/NOPB?
All LM2853MHX-0.8/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM2853MHX-0.8/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-0.8/NOPB part is unused and in its original packaging.
Return procedure for LM2853MHX-0.8/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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