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Texas Instruments LM2853MH-0.8/NOPB
- Part No.:
- LM2853MH-0.8/NOPB
- Manufacturer:
- Texas Instruments
- Package:
- 14-PowerTSSOP (0.173", 4.40mm Width)
- Datasheet:
-
LM2853MH-0.8/NOPB.pdf
- Description:
- IC REG BUCK 0.8V 3A 14HTSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,683
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Product details
Overview
LM2853MH-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 soft-start control-enabling compact point-of-load regulation for FPGA core supplies.
For engineers reviewing the LM2853MH-0.8/NOPB datasheet, LM2853MH-0.8/NOPB pinout, LM2853MH-0.8/NOPB application, or LM2853MH-0.8/NOPB equivalent, key selection criteria include its fixed 0.8V output tolerance (±2.25%), 12 µA shutdown current, thermal shutdown at 165°C, and compatibility with low-ESR ceramic/tantalum output capacitors per TI's recommended CO/LO tables.
Technical Context
The LM2853MH-0.8/NOPB employs voltage-mode PWM control with internal type-three compensation, eliminating external compensation components. Its dual-rail architecture separates AVIN (3.0–5.5V control supply) from PVIN (1.5–5.5V power stage), enabling flexible biasing and improved transient response under split-rail operation.
Switch node protection monitors SW voltage to disable switching during fault conditions, while integrated peak-current limiting (3.6–5 A) and thermal shutdown (165°C with 10°C hysteresis) ensure robust overcurrent and overtemperature handling without external circuitry.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 0.8 V ±2.25% (factory EEPROM-programmed; no external feedback required) |
| Max Output Current | 3 A continuous-supports FPGA/DSP core rails without derating at TJ ≤ 125°C |
| Input Voltage Range | 3.0 V to 5.5 V on AVIN; 1.5 V to 5.5 V on PVIN-enables split-rail operation for efficiency optimization |
| Switching Frequency | 550 kHz nominal (325–725 kHz range)-balances size (small inductor) and efficiency for 1–3 A loads |
| Quiescent Current | 12 µA in shutdown-minimizes battery drain in always-on systems |
| FET RDS(on) | 40 mΩ (PFET) / 32 mΩ (NFET)-reduces conduction loss; enables >90% efficiency at 2 A, VIN=5 V, VOUT=0.8 V |
| Thermal Resistance θJA | 38 °C/W (HTSSOP-14 with exposed pad soldered to PCB ground plane)-requires thermal pad connection for full 3 A rating |
Pinout & Package
LM2853MH-0.8/NOPB uses the HTSSOP-14 (PWP) package with exposed thermal pad (EP), dimensionally identical to MXA14A drawing. The exposed pad must be soldered to a PCB ground plane for thermal and electrical performance but is not the primary GND path.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (AVIN) | Control logic supply | Must be ≥3.0 V; powers internal reference, error amp, and logic-decoupled locally with 1 µF ceramic |
| 2 (EN) | Enable input | Active-high; internally pulled up-driven low (<25% AVIN) to enter 12 µA shutdown mode |
| 3 (SGND) | Analog ground | Low-noise return for AVIN, SS, SNS-separate from PGND to minimize noise coupling into feedback path |
| 4 (SS) | Soft-start timing | Connects to external capacitor (1–50 nF); sets startup ramp time via internal 450 kΩ DAC resistor |
| 5,12,13 (NC) | No-connect | Internally unconnected; must be tied to SGND or PGND per layout guidelines |
| 6,7 (PVIN) | Power FET supply | High-current input (1.5–5.5 V); requires low-ESR bulk capacitor placed adjacent to pins |
| 8,9 (SW) | Switch node | Drives external inductor; high dV/dt node-keep trace short/wide and away from SNS/SGND |
| 10,11 (PGND) | Power ground | High-current return for PVIN and SW-tied to EP and SGND at single-point star ground |
| 14 (SNS) | Voltage sense input | Connects to output rail via Kelvin sense trace; regulates output at 0.8 V using internal 200 kΩ divider |
| EP | Exposed thermal pad | Internally connected to GND; must be soldered to large PCB copper area for thermal dissipation and noise reduction |
Key Features
| Feature | Design Value |
|---|---|
| Integrated Type-Three Compensation | Eliminates external compensation network-reduces BOM count and design iteration for stable loop response |
| Factory-Programmed Output | 0.8 V set at wafer level via EEPROM-no external resistors needed; avoids tolerance stacking and layout sensitivity |
| Split-Rail Input Architecture | Independent AVIN/PVIN supplies allow optimized control logic biasing and reduced power loss in low-VOUT applications |
| Internal Power FETs | 40 mΩ/32 mΩ RDS(on) MOSFETs enable high efficiency at 0.8 V output without discrete switch losses or gate drive complexity |
| Switch Node Protection | Monitors SW voltage to prevent shoot-through and device damage during start-up or overload-no external fault management required |
Applications
| Baseband Processor Core Supply | FPGA I/O Bank Regulation |
|---|---|
Use Scenario: Powering ARM Cortex-A series baseband processors requiring tightly regulated 0.8 V core voltage with fast load transient response. IC Role / Device Role / Timing Role: Primary DC-DC converter delivering 3 A peak current; regulates core voltage with ±2.25% accuracy across temperature and line variation. Use Value: Internal soft-start and current-limit protection ensure glitch-free processor boot; 12 µA shutdown supports deep-sleep modes in portable infrastructure. | Use Scenario: Providing clean, low-noise 0.8 V supply to FPGA I/O banks in high-speed communication equipment. IC Role / Device Role / Timing Role: Local point-of-load regulator placed near FPGA package; uses Kelvin SNS sensing to maintain voltage accuracy at the die. Use Value: Exposed-pad thermal design sustains 3 A output without airflow; 550 kHz switching allows compact 4.7 µH inductor per TI's LO/CO table. |
| ASIC Memory Interface Rail | Low-Power DSP Subsystem |
Use Scenario: Supplying DDR memory interface circuitry in networking ASICs where voltage margin is constrained by JEDEC specifications. IC Role / Device Role / Timing Role: Fixed-output buck regulator with tight 0.8 V tolerance (±18 mV) ensuring compliance with DDR3L/DDR4 VDDQ requirements. Use Value: Low 38 °C/W θJA maintains junction temperature <125°C under sustained 2.5 A load-avoids thermal throttling during burst transfers. | Use Scenario: Powering always-on DSP subsystems in industrial edge nodes requiring ultra-low quiescent current during idle states. IC Role / Device Role / Timing Role: Enable-controlled power stage; enters 12 µA shutdown when EN is pulled low, preserving battery life in battery-backed systems. Use Value: Internal UVLO (2.47 V rising threshold) prevents brownout operation; thermal shutdown (165°C) protects against ambient overheating in sealed enclosures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS54302DDCR | 3 A, 2.5–6 V input, adjustable output (0.6–5.5 V) via external resistors; 500 kHz switching; 18 µA shutdown current | Requires external feedback network; lacks factory-programmed 0.8 V option; wider input range suits 5 V system rails | Select when adjustable output or higher input voltage (>5.5 V) is required; verify loop stability with external compensation. |
| MP2332HGTL-Z | 3 A, 4.5–28 V input, fixed 0.8 V output; 500 kHz switching; 25 µA shutdown current; QFN-10 package | Higher minimum input (4.5 V) limits use with 3.3 V sources; smaller QFN-10 lacks exposed pad thermal mass of HTSSOP-14 | Choose for space-constrained designs needing wide VIN range; confirm thermal performance at 3 A with 10-pin QFN footprint. |
Compared with LM2853MH-0.8/NOPB, TPS54302DDCR offers flexibility at the cost of BOM count and layout sensitivity, while MP2332HGTL-Z trades input voltage range and thermal capability for package size-neither is pin-compatible, requiring PCB redesign.
Availability
LM2853MH-0.8/NOPB is available at Aetrix Electronics and suitable for FPGA core power, ASIC memory interface rails, and low-power DSP subsystems requiring stable component supply with RoHS-compliant, green (Pb-free, Sb/Br-free) packaging.
Supply support for LM2853MH-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 decades of expertise in power management ICs.
The LM2853MH-0.8/NOPB belongs to TI's SIMPLE SWITCHER® synchronous buck regulator family, designed specifically for high-efficiency, low-component-count point-of-load conversion in space- and thermally-constrained digital systems.
FAQ
What is the output voltage tolerance of LM2853MH-0.8/NOPB across temperature and line variation?
The LM2853MH-0.8/NOPB has a guaranteed output voltage tolerance of ±2.25% (±18 mV) over −40°C to +125°C junction temperature and full input range, verified per Electrical Characteristics table for the 0.8 V option. This specification applies with proper Kelvin SNS routing and recommended output capacitor ESR.
Can LM2853MH-0.8/NOPB operate with separate AVIN and PVIN supplies?
Yes, LM2853MH-0.8/NOPB supports split-rail operation: AVIN may be supplied from a clean 3.3 V source for control logic while PVIN is driven from a higher-current 5 V rail. PVIN must be ≤ AVIN, and output filter components must be selected based on PVIN value per TI's Applications Information section.
What is the minimum soft-start capacitor value recommended for LM2853MH-0.8/NOPB?
The LM2853MH-0.8/NOPB requires a soft-start capacitor between 1 nF and 50 nF, as specified in the Applications Information section. A 2.2 nF ceramic capacitor yields ~3 ms startup time; values below 1 nF risk current-limit start-up, while above 50 nF may delay recovery after fault events.
Does LM2853MH-0.8/NOPB require external compensation components?
No, LM2853MH-0.8/NOPB integrates a complete type-three compensation network. External compensation is unnecessary-TI's recommended inductor (4.7–6.8 µH) and output capacitor (120–220 µF, 50–150 mΩ ESR) ranges ensure stability without additional components.
How is thermal performance affected if the exposed pad of LM2853MH-0.8/NOPB is not soldered to PCB ground?
If the exposed pad of LM2853MH-0.8/NOPB is unsoldered or poorly connected, θJA degrades significantly beyond the rated 38 °C/W, causing junction temperature to exceed 125°C at <2 A load. TI's Layout Guidelines mandate full-solder connection to a dedicated ground plane for rated 3 A operation and optimal regulation accuracy.
LM2853MH-0.8/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:
- 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
LM2853MH-0.8/NOPB FAQ
1.How can I place an order for LM2853MH-0.8/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM2853MH-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 LM2853MH-0.8/NOPB reliable?
The price and inventory of LM2853MH-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 LM2853MH-0.8/NOPB is usually 5 days.
3.What payment methods are accepted for LM2853MH-0.8/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM2853MH-0.8/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM2853MH-0.8/NOPB?
LM2853MH-0.8/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM2853MH-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 LM2853MH-0.8/NOPB?
For technical support, including LM2853MH-0.8/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM2853MH-0.8/NOPB requirements.
6.How does Aetrix verify that LM2853MH-0.8/NOPB is sourced from the original manufacturer or authorized distributors?
All LM2853MH-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 LM2853MH-0.8/NOPB meets industry standards.
7.What is the process for return or replacement of LM2853MH-0.8/NOPB?
All LM2853MH-0.8/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM2853MH-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 LM2853MH-0.8/NOPB part is unused and in its original packaging.
Return procedure for LM2853MH-0.8/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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