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

Texas Instruments LM2853MH-1.2

Name: LM2853MH-1.2
Brand: Texas Instruments
SKU: LM2853MH-1.2
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: LM2853MH-1.2

Manufacturer:: Texas Instruments

Category:: Voltage Regulators - DC DC Switching Regulators

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

Datasheet:: LM2853MH-1.2.pdf

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

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Product details

Overview

LM2853MH-1.2 from Texas Instruments is a 3A, 550 kHz synchronous buck regulator in an exposed-pad HTSSOP-14 package, delivering a factory-programmed 1.2 V output from 3.0–5.5 V 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-1.2 datasheet, LM2853MH-1.2 pinout, LM2853MH-1.2 application, or LM2853MH-1.2 equivalent, key selection criteria include its 1.2 V ±2.25% output tolerance at 25°C, 12 µA shutdown current, thermal shutdown at 165°C with 10°C hysteresis, and compatibility with 4.7–6.8 µH inductors and 120–220 µF output capacitors per TI's validated design guidelines.

Technical Context

The LM2853MH-1.2 employs voltage-mode PWM control with internal type-three compensation, eliminating external compensation components. Its dual-rail architecture separates AVIN (3.0–5.5 V control supply) from PVIN (1.5–5.5 V power stage), supporting split-rail operation where PVIN ≤ AVIN.

Protection features include cycle-by-cycle peak current limiting (3.6–5 A threshold), UVLO on AVIN (2.47–3.0 V turn-on with 50–260 mV hysteresis), and thermal shutdown with automatic recovery. The switch node (SW) is internally monitored to suppress switching under no-load fault conditions until load is applied.

Key Specifications

Parameter	Value and Actual Design Meaning
Output Voltage	Factory-set 1.2 V ±2.25% (1.173–1.227 V) at TJ = 25°C; stable across −40°C to +125°C junction range.
Max Output Current	3 A continuous; supports transient loads up to 5 A peak before current-limit activation.
Input Voltage Range	AVIN: 3.0–5.5 V (control logic); PVIN: 1.5–5.5 V (power stage); enables flexible split-rail biasing.
Switching Frequency	550 kHz nominal (325–725 kHz range); enables compact magnetics and predictable EMI profile.
Quiescent Current	12 µA in shutdown (EN = 0 V); reduces system standby power in battery-backed or always-on applications.
Thermal Resistance	θJA = 38 °C/W (MXA14A package); requires exposed pad soldered to PCB ground plane for rated performance.
Internal FET RDS(ON)	P-FET: 40 mΩ typ / 120 mΩ max; N-FET: 32 mΩ typ / 100 mΩ max; defines conduction loss and efficiency at full load.

Pinout & Package

Package: HTSSOP-14 (PWP) with exposed thermal pad (EP), RoHS-compliant, moisture sensitivity level 1 (260°C reflow).

Pin/Terminal	Circuit Role	Design Meaning
1 (AVIN)	Control supply input	Provides regulated bias for internal logic; must be ≥3.0 V and ≥PVIN for proper operation.
2 (EN)	Enable control	Active-high; internal pull-up ensures default enable; driven low (<25% of AVIN) disables regulator.
3 (SGND)	Signal ground reference	Low-noise analog ground for feedback and control circuitry; separate from PGND to minimize noise coupling.
4 (SS)	Soft-start timing node	Connects to external capacitor (1–50 nF) to control output ramp time; internal 450 kΩ resistor sets RC time constant.
5, 12, 13 (NC)	No-connect terminals	Internally unconnected; must be tied to SGND or PGND per layout guidelines to reduce noise and improve thermal path.
6, 7 (PVIN)	Power stage input	High-current input for integrated FETs; requires low-ESR bulk capacitor placed adjacent to pins.
8, 9 (SW)	Power switch node	Drives external inductor; high dV/dt node requiring short, wide trace routing and isolation from sensitive signals.
10, 11 (PGND)	Power ground return	High-current return path for FETs and inductor; must connect directly to exposed pad and shared ground plane.
14 (SNS)	Output voltage sense	Resistive divider input for feedback; routed directly to load for accurate remote sensing; 432 kΩ internal divider top resistor.
EP (Exposed Pad)	Thermal & electrical ground	Internally connected to GND but not primary current return; must be soldered to large PCB ground plane for thermal dissipation and regulation stability.

Key Features

Feature	Design Value
Integrated Type-Three Compensation	Eliminates external compensation network, reducing BOM count and layout sensitivity while ensuring stability with recommended LO/CO ranges.
Factory-Programmed Output	Fixed 1.2 V output set via internal EEPROM; avoids external resistor divider errors and saves board space versus adjustable regulators.
Split-Rail Input Architecture	Independent AVIN and PVIN inputs allow optimization of control logic supply (e.g., 3.3 V) and power stage supply (e.g., 5 V), improving efficiency and noise isolation.
Low Shutdown Quiescent Current	12 µA shutdown current enables use in energy-sensitive systems such as portable instrumentation or always-on IoT edge nodes.
Robust Thermal Protection	165°C thermal shutdown with 10°C hysteresis prevents damage during overload or poor heatsinking; automatic restart after cooldown.

Applications

FPGA Core Power Supply	DSP Local Point-of-Load Regulation
Use Scenario: Providing tightly regulated 1.2 V supply to Xilinx Spartan-6 or Intel Cyclone IV FPGA core rails with fast transient response. IC Role / Device Role / Timing Role: Primary DC-DC buck converter delivering 3 A continuous current with <2.25% output tolerance and <2 mV/A load regulation. Use Value: Enables reliable FPGA configuration and operation under dynamic load changes; internal compensation ensures stable loop response without tuning.	Use Scenario: Generating clean 1.2 V rail for TI C674x DSP cores in industrial motor control gateways. IC Role / Device Role / Timing Role: Synchronous step-down regulator with 550 kHz switching frequency, minimizing output ripple and enabling small external LC filter size. Use Value: Reduces solution footprint vs. lower-frequency alternatives; exposed pad improves thermal margin in sealed enclosures.
Broadband Network Processor Power	ASIC SoC I/O Domain Supply
Use Scenario: Powering Broadcom BCM58xx network processors in 10Gbps line cards requiring low-noise, high-efficiency 1.2 V supply. IC Role / Device Role / Timing Role: High-current buck regulator with soft-start (CSS-controlled) to prevent inrush current during hot-swap insertion. Use Value: 12 µA shutdown current extends system-level power budget; split-rail inputs isolate noisy digital I/O supply from sensitive analog control logic.	Use Scenario: Delivering 1.2 V to ASIC I/O banks in test equipment where supply sequencing and voltage accuracy are critical. IC Role / Device Role / Timing Role: Fixed-output buck regulator with remote sensing (SNS pin) to compensate for PCB trace IR drop. Use Value: Factory-trimmed output eliminates calibration overhead; 432 kΩ internal sense resistor simplifies feedback network design.

FPGA Core Power Supply

DSP Local Point-of-Load Regulation

Use Scenario: Providing tightly regulated 1.2 V supply to Xilinx Spartan-6 or Intel Cyclone IV FPGA core rails with fast transient response.

IC Role / Device Role / Timing Role: Primary DC-DC buck converter delivering 3 A continuous current with <2.25% output tolerance and <2 mV/A load regulation.

Use Value: Enables reliable FPGA configuration and operation under dynamic load changes; internal compensation ensures stable loop response without tuning.

Use Scenario: Generating clean 1.2 V rail for TI C674x DSP cores in industrial motor control gateways.

IC Role / Device Role / Timing Role: Synchronous step-down regulator with 550 kHz switching frequency, minimizing output ripple and enabling small external LC filter size.

Use Value: Reduces solution footprint vs. lower-frequency alternatives; exposed pad improves thermal margin in sealed enclosures.

Broadband Network Processor Power

ASIC SoC I/O Domain Supply

Use Scenario: Powering Broadcom BCM58xx network processors in 10Gbps line cards requiring low-noise, high-efficiency 1.2 V supply.

IC Role / Device Role / Timing Role: High-current buck regulator with soft-start (CSS-controlled) to prevent inrush current during hot-swap insertion.

Use Value: 12 µA shutdown current extends system-level power budget; split-rail inputs isolate noisy digital I/O supply from sensitive analog control logic.

Use Scenario: Delivering 1.2 V to ASIC I/O banks in test equipment where supply sequencing and voltage accuracy are critical.

IC Role / Device Role / Timing Role: Fixed-output buck regulator with remote sensing (SNS pin) to compensate for PCB trace IR drop.

Use Value: Factory-trimmed output eliminates calibration overhead; 432 kΩ internal sense resistor simplifies feedback network design.

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, 2.7–6 V input, adjustable output (0.6–6 V), 500 kHz switching, integrated compensation, 29 µA IQ in sleep mode.	Requires external feedback resistors; lacks factory-programmed 1.2 V option; supports wider input range.	Choose when adjustable output or extended input range is needed; verify soft-start and thermal performance match system requirements.
MP2315DJ-LF-Z	3 A, 4.5–28 V input, fixed 1.2 V output, 500 kHz, no integrated compensation (requires external RC), 25 µA shutdown current.	Higher minimum input voltage limits use in 3.3 V-only systems; external compensation increases design complexity and component count.	Consider only if higher input voltage capability is required; confirm layout accommodates larger external compensation network.

Compared with TPS54302DDCR and MP2315DJ-LF-Z, the LM2853MH-1.2 offers factory-trimmed 1.2 V output with zero external feedback components, lower shutdown current (12 µA), and optimized thermal performance via exposed-pad HTSSOP-making it ideal for space-constrained, fixed-voltage FPGA/DSP core supplies where design simplicity and thermal reliability are prioritized.

Availability

LM2853MH-1.2 is available at Aetrix Electronics and suitable for FPGA core power, DSP local regulation, and broadband networking infrastructure requiring stable component supply, consistent parametric performance, and long-term production continuity.

Supply support for LM2853MH-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 LM2853MH-1.2 belongs to TI's SIMPLE SWITCHER® synchronous buck regulator family, engineered for low-component-count, thermally robust point-of-load power delivery in FPGA, DSP, and ASIC applications demanding precise voltage regulation and rapid transient response.

FAQ

What is the output voltage tolerance of the LM2853MH-1.2 over temperature and load?

The LM2853MH-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) and full 0–3 A load, total variation remains within ±3% per datasheet specifications. This includes contributions from line regulation (≤1.1%), load regulation (≤2 mV/A), and thermal drift-all validated in TI's production testing for the LM2853MH-1.2.

Can the LM2853MH-1.2 operate with AVIN and PVIN supplied from different sources?

Yes-the LM2853MH-1.2 supports true split-rail operation: AVIN (3.0–5.5 V) powers the control circuitry, while PVIN (1.5–5.5 V) powers the power FETs. PVIN must always be ≤ AVIN. This architecture isolates noise-sensitive analog control from high-current switching paths, improving PSRR and enabling optimized supply sequencing in multi-rail systems using the LM2853MH-1.2.

What is the recommended soft-start capacitor value for the LM2853MH-1.2?

Texas Instruments recommends a 2.2 nF ceramic capacitor (e.g., Vishay-Vitramon VJ0805Y222KXXA) for the SS pin of the LM2853MH-1.2 to achieve ~3 ms startup time. The internal 450 kΩ resistor forms an RC network with CSS; values between 1 nF and 50 nF are supported. Larger values increase startup time but improve inrush control-critical for hot-swap or battery-powered applications using the LM2853MH-1.2.

Does the LM2853MH-1.2 require external compensation components?

No-the LM2853MH-1.2 integrates a complete type-three compensation network on-die. This eliminates external compensation capacitors and resistors, reducing bill-of-materials count and layout sensitivity. Stability is ensured when using inductors (4.7–6.8 µH) and output capacitors (120–220 µF, 60–150 mΩ ESR) within TI's validated ranges for the LM2853MH-1.2.

How is thermal performance affected if the exposed pad of the LM2853MH-1.2 is not soldered to the PCB ground plane?

Failure to solder the exposed pad (EP) of the LM2853MH-1.2 to a solid PCB ground plane degrades θJA by >25%, risking thermal shutdown under 2–2.5 A load. TI measures θJA = 38 °C/W only with EP fully soldered to ≥1 in² copper area. Without this, junction temperature rise exceeds specification limits, compromising regulation accuracy and long-term reliability of the LM2853MH-1.2.

LM2853MH-1.2 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):: 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

LM2853MH-1.2 FAQ

1.How can I place an order for LM2853MH-1.2 through Aetrix?

Please submit a Request for Quotation (RFQ) for LM2853MH-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 LM2853MH-1.2 reliable?

The price and inventory of LM2853MH-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 LM2853MH-1.2 is usually 5 days.

3.What payment methods are accepted for LM2853MH-1.2?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM2853MH-1.2 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for LM2853MH-1.2?

LM2853MH-1.2 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your LM2853MH-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 LM2853MH-1.2?

For technical support, including LM2853MH-1.2 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM2853MH-1.2 requirements.

6.How does Aetrix verify that LM2853MH-1.2 is sourced from the original manufacturer or authorized distributors?

All LM2853MH-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 LM2853MH-1.2 meets industry standards.

7.What is the process for return or replacement of LM2853MH-1.2?

All LM2853MH-1.2 units undergo pre-shipment inspection (PSI). If there is an issue with LM2853MH-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 LM2853MH-1.2 part is unused and in its original packaging.

Return procedure for LM2853MH-1.2:

1.Submit a request within 90 days.

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

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