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Texas Instruments LM2853MH-1.0
- Part No.:
- LM2853MH-1.0
- Manufacturer:
- Texas Instruments
- Package:
- 14-PowerTSSOP (0.173", 4.40mm Width)
- Datasheet:
-
LM2853MH-1.0.pdf
- Description:
- IC REG BUCK 1V 3A 14HTSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,003
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Product details
Overview
LM2853MH-1.0 from Texas Instruments is a 3A, 550 kHz synchronous buck regulator in an exposed-pad HTSSOP-14 package, delivering a factory-programmed 1.0 V output from 3.0–5.5 V input. It integrates internal 40 mΩ/32 mΩ MOSFETs, type-three compensation, and soft-start control for FPGA/DSP core power with ±2.25% output voltage tolerance at 25°C.
For engineers reviewing the LM2853MH-1.0 datasheet, LM2853MH-1.0 pinout, LM2853MH-1.0 application, or LM2853MH-1.0 equivalent, key selection criteria include its fixed 1.0 V output, 12 µA shutdown current, thermal shutdown at 165°C, and compatibility with low-ESR ceramic/tantalum output capacitors per TI SNVS459.
Technical Context
The LM2853MH-1.0 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 logic supply) from PVIN (1.5–5.5 V power stage input), enabling optimized noise isolation and flexible input sourcing.
Protection features include cycle-by-cycle peak current limiting (3.6–5 A threshold), thermal shutdown with 10°C hysteresis, and switch-node fault monitoring that disables switching under overvoltage or short-circuit conditions until load recovery.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.0 V ±2.25% at TJ = 25°C; factory-programmed EEPROM setting ensures no external feedback resistors required. |
| Max Output Current | 3 A continuous; supports high-current digital loads like ASIC cores without external current-sense amplifiers. |
| Input Voltage Range | AVIN: 3.0–5.5 V; PVIN: 1.5–5.5 V; split-rail operation allows independent optimization of control and power supplies. |
| Switching Frequency | 550 kHz nominal (325–725 kHz range); enables compact magnetics and reduces output ripple vs. lower-frequency alternatives. |
| Quiescent Current | 12 µA in shutdown (EN = 0 V); minimizes battery drain in always-on system standby modes. |
| Thermal Resistance | θJA = 38 °C/W (MXA14A package); exposed pad soldered to PCB ground plane required for full 3 A capability. |
| Protection Features | Thermal shutdown (165°C), overcurrent limit, UVLO (2.47–3.0 V AVIN threshold), and switch-node fault detection. |
Pinout & Package
Package: HTSSOP-14 with exposed thermal pad (TI package drawing PWP, JEDEC MO-153 variant). The exposed pad (EP) is internally connected to GND and must be soldered to a dedicated PCB ground plane for thermal and electrical performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (AVIN) | Control circuit supply | Provides regulated bias for internal logic; must be ≥3.0 V and decoupled locally with 1 µF ceramic capacitor. |
| 2 (EN) | Enable input | Active-high enable; internally pulled up; drives device into shutdown when pulled below 25% of AVIN. |
| 3 (SGND) | Signal ground | Low-noise reference for error amplifier and feedback; must be isolated from PGND traces to avoid noise coupling. |
| 4 (SS) | Soft-start timing node | Connects to external capacitor (1–50 nF) to control output ramp rate; internal 450 kΩ resistor sets RC time constant. |
| 5, 12, 13 (NC) | No-connect | Must be tied to SGND or PGND per layout guidelines; not internally floating. |
| 6,7 (PVIN) | Power FET supply | High-current input for internal MOSFETs; requires low-impedance path to bulk input capacitor (e.g., 47 µF ceramic). |
| 8,9 (SW) | Switch node | Drives external inductor; high dV/dt node requiring short, wide trace routing and EMI-aware layout. |
| 10,11 (PGND) | Power ground | Return path for high-switching currents; must connect directly to input/output capacitor grounds and EP. |
| 14 (SNS) | Output voltage sense | High-impedance feedback input; connect directly to load via Kelvin sense to maintain ±2.25% regulation accuracy. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated Power Stage | Internal 40 mΩ PFET and 32 mΩ NFET switches eliminate external MOSFETs and drivers, reducing BOM count and layout area. |
| Type-Three Compensation | On-chip compensation network eliminates external compensation components, simplifying design and improving stability across recommended LO/CO ranges. |
| Split-Rail Input Architecture | Independent AVIN and PVIN supplies allow separate optimization-e.g., clean 3.3 V for control logic and noisy 5 V for power stage-improving PSRR and noise immunity. |
| Factory-Programmed Output | 1.0 V output set permanently in EEPROM during manufacturing; no external resistors or configuration pins needed for fixed-voltage applications. |
| Thermal-Enhanced Package | HTSSOP-14 with exposed pad achieves 38 °C/W θJA; mandatory soldering to PCB ground plane enables full 3 A continuous operation at 125°C junction temperature. |
Applications
| FPGA Core Power Supply | DSP Local Point-of-Load Regulation |
|---|---|
|
Use Scenario: Providing stable 1.0 V rail to Xilinx Spartan-6 or Intel Cyclone IV FPGA core logic under dynamic load transients up to 2 A/µs. IC Role / Device Role / Timing Role: Primary DC-DC buck converter delivering regulated core voltage; operates at 550 kHz to minimize inductor size while maintaining transient response. Use Value: Integrated MOSFETs and type-three compensation reduce component count to just four external parts (CIN, CO, LO, CSS), accelerating board bring-up and improving reliability. |
Use Scenario: Powering TI C6748 DSP core in industrial motor control systems where input voltage varies between 3.3 V and 5 V. IC Role / Device Role / Timing Role: Fixed-output synchronous buck regulator with 12 µA shutdown current enabling low-power sleep modes without external LDO sequencing. Use Value: Split-rail inputs (AVIN = 3.3 V, PVIN = 5 V) isolate sensitive control circuitry from power-stage noise, improving ADC reference stability and jitter performance. |
| Broadband Router SoC Supply | Industrial PLC I/O Module Power |
|
Use Scenario: Generating 1.0 V for Broadcom BCM6368 SoC in DSL/cable gateway hardware operating in 0–70°C ambient. IC Role / Device Role / Timing Role: High-efficiency step-down regulator with 550 kHz switching frequency enabling use of 4.7 µH inductors and 120–220 µF tantalum output capacitors. Use Value: Thermal shutdown (165°C) and current limit (≥3.6 A) protect against sustained overload during firmware update or packet burst conditions. |
Use Scenario: Supplying 1.0 V to ARM Cortex-M7 microcontroller in DIN-rail mounted PLC I/O modules with extended -40°C to +85°C operating range. IC Role / Device Role / Timing Role: Robust buck regulator qualified for industrial temperature range (-40°C to +125°C junction), with 38 °C/W thermal resistance enabling convection-cooled designs. Use Value: Exposed-pad HTSSOP-14 package allows direct thermal coupling to metal chassis, eliminating need for heatsinks in space-constrained 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, 1.0 V fixed output; 2.5–6 V input; 500 kHz switching; integrated compensation; no split-rail AVIN/PVIN. | Single-rail input simplifies supply design but reduces noise isolation; lacks soft-start pin for precise ramp control. | Select when board space is critical and AVIN/PVIN separation is unnecessary; verify thermal performance with θJA = 74 °C/W (SOT-23-6). |
| MP2315GJ-Z | 3 A, 1.0 V fixed output; 4.5–28 V input; 500 kHz; integrated MOSFETs; no soft-start pin or split-rail support. | Wider input range suits 12 V intermediate bus architectures; higher minimum input limits use in 3.3 V systems. | Choose for 12 V input systems needing 1.0 V core rail; confirm stability with MP2315's type-II compensation versus LM2853MH-1.0's type-III. |
Compared with TPS54302DDCR and MP2315GJ-Z, the LM2853MH-1.0 uniquely provides split-rail inputs, a dedicated soft-start pin, and tighter output tolerance (±2.25%)-critical for noise-sensitive FPGA/DSP core supplies where layout-controlled grounding and controlled startup are mandatory.
Availability
LM2853MH-1.0 is available at Aetrix Electronics and suitable for FPGA core power, DSP local regulation, and broadband networking infrastructure requiring stable component supply with RoHS-compliant, green (Pb-free, Sb/Br-free) packaging.
Supply support for LM2853MH-1.0 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 and embedded processing technologies, with decades of expertise in power management ICs.
The LM2853MH-1.0 belongs to TI's SIMPLE SWITCHER® synchronous buck regulator family, designed specifically for high-efficiency, low-component-count point-of-load conversion in space-constrained digital systems.
FAQ
What is the output voltage tolerance of the LM2853MH-1.0 over temperature?
The LM2853MH-1.0 has a guaranteed output voltage tolerance of ±2.25% over the full operating junction temperature range of −40°C to +125°C. At 25°C, the typical tolerance is tighter: 0.9775 V to 1.0225 V (±2.25% of 1.0 V), as specified in the Electrical Characteristics table of SNVS459. This precision is achieved through factory-programmed EEPROM calibration and internal bandgap reference stability.
Can the LM2853MH-1.0 operate with only a 3.3 V input supply?
Yes, the LM2853MH-1.0 supports PVIN down to 1.5 V and AVIN down to 3.0 V, making it fully compatible with a 3.3 V input. When using 3.3 V, ensure PVIN and AVIN are both supplied at 3.3 V (or AVIN ≥ PVIN), and select output filter components per Table 1 in SNVS459-for 1.0 V output, use 4.7 µH inductor and 120–220 µF output capacitor with 50–100 mΩ ESR.
Does the LM2853MH-1.0 require external compensation components?
No, the LM2853MH-1.0 integrates a complete type-three compensation network on-die. This eliminates all external compensation components (e.g., resistors, capacitors, op-amps), reducing design complexity and component count. Stability is ensured only when using inductors and capacitors within the recommended ranges in Table 1 of SNVS459.
How is thermal performance affected if the exposed pad is not soldered to PCB ground?
If the exposed pad (EP) of the LM2853MH-1.0 is not soldered to a solid PCB ground plane, thermal resistance increases significantly-θJA degrades beyond the rated 38 °C/W. This causes excessive junction temperature rise under 3 A load, potentially triggering thermal shutdown or reducing lifetime. TI's layout guidelines mandate full-surface soldering of EP to a thermal via array connected to an internal ground plane.
What is the purpose of the NC pins (5, 12, 13) on the LM2853MH-1.0?
Pins 5, 12, and 13 are designated No-Connect (NC) in the LM2853MH-1.0 datasheet and must be tied to ground-either SGND or PGND-as explicitly stated in the Pin Descriptions section. Leaving them floating violates TI's layout recommendations and may cause instability or EMI issues due to parasitic coupling in the HTSSOP-14 package.
LM2853MH-1.0 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):
- 1V
- 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-1.0 FAQ
1.How can I place an order for LM2853MH-1.0 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM2853MH-1.0 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-1.0 reliable?
The price and inventory of LM2853MH-1.0 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM2853MH-1.0 is usually 5 days.
3.What payment methods are accepted for LM2853MH-1.0?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM2853MH-1.0 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM2853MH-1.0?
LM2853MH-1.0 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM2853MH-1.0 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-1.0?
For technical support, including LM2853MH-1.0 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM2853MH-1.0 requirements.
6.How does Aetrix verify that LM2853MH-1.0 is sourced from the original manufacturer or authorized distributors?
All LM2853MH-1.0 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-1.0 meets industry standards.
7.What is the process for return or replacement of LM2853MH-1.0?
All LM2853MH-1.0 units undergo pre-shipment inspection (PSI). If there is an issue with LM2853MH-1.0, 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-1.0 part is unused and in its original packaging.
Return procedure for LM2853MH-1.0:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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