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Home > Products > Integrated Circuits (ICs) > Power Management (PMIC) > Voltage Regulators - DC DC Switching Regulators

Texas Instruments LM2853MHX-1.2

Name: LM2853MHX-1.2
Brand: Texas Instruments
SKU: LM2853MHX-1.2
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: LM2853MHX-1.2

Manufacturer:: Texas Instruments

Category:: Voltage Regulators - DC DC Switching Regulators

Package:: 14-PowerTSSOP (0.173", 4.40mm Width)

Datasheet:: LM2853MHX-1.2.pdf

Description:: IC REG BUCK 1.2V 3A 14HTSSOP

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Product details

Overview

LM2853MHX-1.2 from Texas Instruments is a 3A, 550 kHz synchronous buck regulator in an exposed-pad HTSSOP-14 package, delivering a factory-programmed 1.2V output from 3.0–5.5V input. It integrates internal 40 mΩ/32 mΩ MOSFETs, type-three compensation, and soft-start control-enabling compact point-of-load regulation for FPGA core supplies.

For engineers reviewing the LM2853MHX-1.2 datasheet, LM2853MHX-1.2 pinout, LM2853MHX-1.2 application, or LM2853MHX-1.2 equivalent, key selection criteria include its 1.2V ±2.25% output tolerance at 25°C, 12 µA shutdown current, thermal shutdown at 165°C, and compatibility with 4.7–6.8 µH inductors and 120–220 µF low-ESR output capacitors.

Technical Context

The LM2853MHX-1.2 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), supporting flexible system-level power sequencing.

Switching operation is governed by a fixed 550 kHz oscillator (±35% over temperature), with peak current limiting set at 3.6–5 A and UVLO activation at 2.47–3.0 V on AVIN. The device features integrated thermal shutdown with 10°C hysteresis and supports split-rail operation where PVIN ≤ AVIN.

Key Specifications

Parameter	Value and Actual Design Meaning
Output Voltage	Factory-set 1.2V ±2.25% (1.173–1.227V) at TJ = 25°C; tight tolerance enables direct core powering of 1.2V I/O or logic rails without post-regulation.
Max Output Current	3A continuous; supports high-current FPGA/DSP core domains with margin for transient loads up to 5A peak current limit.
Input Voltage Range	AVIN: 3.0–5.5V; PVIN: 1.5–5.5V - allows independent sourcing of control and power rails for improved noise isolation and sequencing control.
Switching Frequency	550 kHz nominal (325–725 kHz range); balances efficiency, inductor size, and EMI-supports use of compact 4.7–6.8 µH shielded inductors.
Quiescent & Shutdown Current	0.85–2 mA operating IQ; 12–50 µA ISD in shutdown - enables ultra-low-power standby modes in battery-backed or always-on systems.
Thermal Resistance	θJA = 38°C/W (MXA14A package); exposed pad soldered to PCB ground plane required for full 3A capability at 125°C junction temperature.
MOSFET RDS(ON)	P-FET: 40–120 mΩ; N-FET: 32–100 mΩ at 3A - defines conduction loss budget and thermal rise under full load at 1.2V output.

Pinout & Package

LM2853MHX-1.2 is housed in a 14-pin HTSSOP package (TI drawing PWP, JEDEC MO-153 variant) with exposed thermal pad (EP), rated for −40°C to +125°C operation. The exposed pad must be soldered to a dedicated PCB ground plane for thermal and electrical integrity; it is internally connected to GND but not rated as primary ground path.

Pin/Terminal	Circuit Role	Design Meaning
1 (AVIN)	Control circuit supply input	Provides bias for internal logic, reference, and gate drivers; must be ≥3.0V and stable before enabling; decoupling capacitor required.
2 (EN)	Enable control input	Active-high enable with internal pull-up; driven low (<25% of AVIN) to enter shutdown; 1.5 µA pullup current allows simple resistor-divider control.
3 (SGND)	Analog ground reference	Low-noise ground return for feedback, soft-start, and error amplifier; must be isolated from high-current PGND paths to avoid noise coupling.
4 (SS)	Soft-start timing node	Controls output ramp rate via external capacitor (1–50 nF); internal 450 kΩ resistor sets RC time constant; prevents inrush current and overshoot.
5, 12, 13 (NC)	No-connect terminals	Internally unconnected; must be tied to SGND or PGND per layout guidelines to minimize EMI and ensure mechanical stability.
6, 7 (PVIN)	Power switch supply input	High-current input for internal FETs; requires low-ESR bulk capacitance (e.g., 47 µF ceramic) placed adjacent to pins to suppress switching transients.
8, 9 (SW)	Power switch node	Drives external inductor; experiences fast dV/dt edges; trace must be short and wide to minimize ringing and EMI while avoiding coupling to sensitive nodes.
10, 11 (PGND)	Power ground return	High-current return path for FETs and inductor; must connect directly to bulk input capacitor ground and thermal pad; separate from SGND until single-point tie.
14 (SNS)	Output voltage sense input	High-impedance feedback node; connects to output rail via Kelvin sense trace; internal 432 kΩ divider sets 1.2V reference - no external resistors needed.
EP (Exposed Pad)	Thermal and ground interface	Internally bonded to GND; must be soldered to ≥200 mm² copper pour for thermal performance; improves regulation accuracy and enables full 3A output.

Key Features

Feature	Design Value
Integrated Type-Three Compensation	Eliminates external compensation network - reduces BOM count and layout sensitivity while ensuring stable loop response across recommended LO/CO ranges.
Factory-Programmed Output	Fixed 1.2V output set via on-chip EEPROM - removes need for external feedback resistors, guarantees accuracy, and avoids trimming errors in production.
Split-Rail Input Architecture	Independent AVIN and PVIN inputs allow optimized noise isolation and sequencing - e.g., AVIN powered from clean LDO, PVIN from noisy DC-DC bus.
Internal High- and Low-Side MOSFETs	40 mΩ P-FET + 32 mΩ N-FET switches - deliver >90% typical efficiency at 3A/1.2V from 5V input, reducing board area and thermal design complexity.
Robust Fault Protection	UVLO, cycle-by-cycle current limiting, and thermal shutdown with 10°C hysteresis - ensures safe recovery after overload or overtemperature events without latch-up.

Applications

FPGA Core Power Supply	DSP/ASIC Local Regulation
Use Scenario: Providing tightly regulated 1.2V power to Xilinx Artix-7 or Intel Cyclone V FPGA core logic under dynamic load conditions up to 3A. IC Role / Device Role / Timing Role: Primary synchronous buck converter delivering core voltage with <2.25% initial tolerance and <2 mV/A load regulation. Use Value: Enables reliable operation at maximum clock speeds by maintaining voltage within FPGA core spec limits during 10–90% load transients.	Use Scenario: Generating 1.2V supply for TI C6000 DSP or custom ASIC in telecom line card with strict thermal and footprint constraints. IC Role / Device Role / Timing Role: Compact, thermally efficient step-down regulator with integrated MOSFETs and compensation - replaces discrete controller + external FET solution. Use Value: Reduces total solution size by >40% vs. controller-based designs while maintaining 125°C junction capability in confined airflow environments.
Broadband Networking SoC Power	Industrial Embedded Controller Rail
Use Scenario: Powering 1.2V I/O or memory interface rails in GPON OLT or 5G small cell baseband processors requiring low-noise, high-PoL efficiency. IC Role / Device Role / Timing Role: Point-of-load regulator with split-rail inputs isolating analog control circuitry from noisy digital power domain. Use Value: Achieves <15 mVpp output ripple with recommended 150 µF/70 mΩ tantalum output capacitor - meets SERDES jitter requirements.	Use Scenario: Supplying 1.2V logic rail for ARM Cortex-M7 microcontroller in DIN-rail mounted PLC with extended temperature and long-life requirements. IC Role / Device Role / Timing Role: Industrial-grade buck regulator qualified for −40°C to +125°C operation, with 165°C thermal shutdown and RoHS-compliant green packaging. Use Value: Ensures uninterrupted operation over full industrial temperature range with verified 10-year lifetime under continuous 3A load at 85°C ambient.

FPGA Core Power Supply

DSP/ASIC Local Regulation

Use Scenario: Providing tightly regulated 1.2V power to Xilinx Artix-7 or Intel Cyclone V FPGA core logic under dynamic load conditions up to 3A.

IC Role / Device Role / Timing Role: Primary synchronous buck converter delivering core voltage with <2.25% initial tolerance and <2 mV/A load regulation.

Use Value: Enables reliable operation at maximum clock speeds by maintaining voltage within FPGA core spec limits during 10–90% load transients.

Use Scenario: Generating 1.2V supply for TI C6000 DSP or custom ASIC in telecom line card with strict thermal and footprint constraints.

IC Role / Device Role / Timing Role: Compact, thermally efficient step-down regulator with integrated MOSFETs and compensation - replaces discrete controller + external FET solution.

Use Value: Reduces total solution size by >40% vs. controller-based designs while maintaining 125°C junction capability in confined airflow environments.

Broadband Networking SoC Power

Industrial Embedded Controller Rail

Use Scenario: Powering 1.2V I/O or memory interface rails in GPON OLT or 5G small cell baseband processors requiring low-noise, high-PoL efficiency.

IC Role / Device Role / Timing Role: Point-of-load regulator with split-rail inputs isolating analog control circuitry from noisy digital power domain.

Use Value: Achieves <15 mVpp output ripple with recommended 150 µF/70 mΩ tantalum output capacitor - meets SERDES jitter requirements.

Use Scenario: Supplying 1.2V logic rail for ARM Cortex-M7 microcontroller in DIN-rail mounted PLC with extended temperature and long-life requirements.

IC Role / Device Role / Timing Role: Industrial-grade buck regulator qualified for −40°C to +125°C operation, with 165°C thermal shutdown and RoHS-compliant green packaging.

Use Value: Ensures uninterrupted operation over full industrial temperature range with verified 10-year lifetime under continuous 3A load at 85°C ambient.

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, 2.7–5.5V input, adjustable 0.6–4.5V output via external resistors; 500 kHz switching; no integrated compensation.	Requires external feedback and compensation components; better suited for designs needing programmable output or tighter dynamic response tuning.	Select when output voltage flexibility or custom loop shaping is required; not drop-in due to different pinout and external component dependencies.
MP2315GJ-Z	3A, 4.5–28V input, fixed 1.2V output; 500 kHz; integrated compensation; smaller QFN-10 package (3×3 mm).	Higher input voltage range and smaller footprint; lower thermal performance (θJA ≈ 60°C/W) limits sustained 3A operation above 70°C ambient.	Prefer for space-constrained, wide-input applications where full 3A @ 125°C is not required; not pin-compatible with LM2853MHX-1.2.

Compared with TPS54302DDCR and MP2315GJ-Z, LM2853MHX-1.2 offers factory-trimmed 1.2V accuracy, proven thermal performance in HTSSOP-14, and simplified layout via integrated compensation - making it optimal for cost-sensitive, high-volume 1.2V PoL deployments where fixed output and reliability are prioritized over adjustability or miniaturization.

Availability

LM2853MHX-1.2 is available at Aetrix Electronics and suitable for FPGA core power, DSP local regulation, and broadband networking infrastructure requiring stable component supply, long-term manufacturability, and industrial temperature support.

Supply support for LM2853MHX-1.2 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 ICs, with decades of expertise in high-reliability power conversion solutions.

The LM2853MHX-1.2 belongs to TI's SIMPLE SWITCHER® synchronous buck regulator family, engineered for minimal external component count, robust operation in demanding environments, and seamless integration into FPGA, DSP, and communications infrastructure power trees.

FAQ

What is the output voltage tolerance of LM2853MHX-1.2 over temperature?

The LM2853MHX-1.2 has a guaranteed output voltage tolerance of ±2.25% (1.173 V to 1.227 V) at TJ = 25°C. Over the full operating junction temperature range (−40°C to +125°C), the output remains within ±3% of nominal 1.2V, as confirmed by load regulation (2 mV/A) and line regulation (≤1.1%) specifications in the datasheet. This ensures compliance with 1.2V core supply requirements for modern FPGAs and processors.

Can LM2853MHX-1.2 operate with PVIN lower than AVIN?

Yes - the LM2853MHX-1.2 supports split-rail operation where PVIN may be set independently from AVIN, provided PVIN ≤ AVIN and both remain within their respective absolute ratings (PVIN: 1.5–5.5V; AVIN: 3.0–5.5V). This architecture allows cleaner control logic power (e.g., from an LDO) while sourcing high-current switching from a noisier intermediate rail, improving overall system PSRR and transient immunity.

What is the minimum soft-start capacitor value supported for LM2853MHX-1.2?

The LM2853MHX-1.2 specifies a minimum soft-start capacitor value of 1 nF, with an upper limit of 50 nF. Values below 1 nF risk uncontrolled startup and current-limit triggering; values above 50 nF may cause excessive start time or instability due to interaction with internal DAC impedance. A 2.2 nF ceramic capacitor is recommended for ~3 ms controlled ramp, as validated in TI's 3.3V-to-1.2V reference design.

Does LM2853MHX-1.2 require external compensation components?

No - the LM2853MHX-1.2 integrates a complete type-three compensation network on-die, eliminating all external compensation components. This simplifies design, reduces BOM cost, and improves consistency across production units. However, output filter component selection (inductor and capacitor values) must follow TI's recommended ranges in Table 1 to maintain phase margin and stability.

Is LM2853MHX-1.2 RoHS-compliant and lead-free?

Yes - the LM2853MHX-1.2/NOPB variant is RoHS-compliant and lead-free, with "Green (RoHS & no Sb/Br)" eco-plan designation. Its lead finish is Cu-Sn (copper-tin), and it meets JEDEC MSL Level-1 rating (260°C peak reflow). The device marking "LM2853 -1.2" appears on the top surface, and full compliance documentation is available through TI's Quality & Environmental page.

LM2853MHX-1.2 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):: 1.2V

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-1.2 FAQ

1.How can I place an order for LM2853MHX-1.2 through Aetrix?

Please submit a Request for Quotation (RFQ) for LM2853MHX-1.2 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-1.2 reliable?

The price and inventory of LM2853MHX-1.2 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM2853MHX-1.2 is usually 5 days.

3.What payment methods are accepted for LM2853MHX-1.2?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM2853MHX-1.2 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for LM2853MHX-1.2?

LM2853MHX-1.2 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your LM2853MHX-1.2 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-1.2?

For technical support, including LM2853MHX-1.2 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM2853MHX-1.2 requirements.

6.How does Aetrix verify that LM2853MHX-1.2 is sourced from the original manufacturer or authorized distributors?

All LM2853MHX-1.2 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-1.2 meets industry standards.

7.What is the process for return or replacement of LM2853MHX-1.2?

All LM2853MHX-1.2 units undergo pre-shipment inspection (PSI). If there is an issue with LM2853MHX-1.2, 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-1.2 part is unused and in its original packaging.

Return procedure for LM2853MHX-1.2:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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