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LM2853MH-2.5
Texas Instruments
IC REG BUCK 2.5V 3A 14HTSSOP
2219 Pcs New Original In Stock
Buck Switching Regulator IC Positive Fixed 2.5V 1 Output 3A 14-PowerTSSOP (0.173", 4.40mm Width)
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5.0 / 5.0
- (159 Ratings)
LM2853MH-2.5
Product Overview
1284025
DiGi Electronics Part Number
LM2853MH-2.5-DGManufacturer
Texas Instruments
LM2853MH-2.5
Description
IC REG BUCK 2.5V 3A 14HTSSOPInventory
2219 Pcs New Original In Stock
Buck Switching Regulator IC Positive Fixed 2.5V 1 Output 3A 14-PowerTSSOP (0.173", 4.40mm Width)
Quantity
Minimum 1
Minimum 1
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LM2853MH-2.5 Technical Specifications
Category
Power Management (PMIC), Voltage Regulators - DC DC Switching Regulators
Packaging
-
Series
SIMPLE SWITCHER®
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)
2.5V
Voltage - Output (Max)
-
Current - Output
3A
Frequency - Switching
550kHz
Synchronous Rectifier
Yes
Operating Temperature
-40°C ~ 125°C (TJ)
Mounting Type
Surface Mount
Package / Case
14-PowerTSSOP (0.173", 4.40mm Width)
Supplier Device Package
14-HTSSOP
Base Product Number
LM2853
Datasheet & Documents
HTML Datasheet
LM2853MH-2.5-DG
Environmental & Export Classification
RoHS Status
RoHS non-compliant
Moisture Sensitivity Level (MSL)
1 (Unlimited)
REACH Status
REACH Unaffected
ECCN
EAR99
HTSUS
8542.39.0001
Additional Information
Standard Package
94
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Reviews
5.0/5.0-(Show up to 5 Ratings)
de desembre 02, 2025
多くの選択肢がありながらも、価格と配送の点で特に優れていると感じます。
de desembre 02, 2025
I was impressed by how quickly the order was processed and shipped—I received my items ahead of schedule.
de desembre 02, 2025
Their after-sales support contributes significantly to our positive experience.
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Frequently Asked Questions (FAQ)
What are the key design risks when replacing the obsolete LM2853MH-2.5 with a modern buck regulator in a 5V-to-2.5V, 3A industrial control board?
The LM2853MH-2.5 is now obsolete, so direct replacement requires careful evaluation of pin compatibility, thermal performance, and control loop stability. A suitable drop-in alternative is the LM2853MH-2.5/NOPB (the RoHS-compliant version), but if that’s unavailable, consider the TPS54332DDAR from Texas Instruments. Unlike the LM2853MH-2.5, the TPS54332DDAR uses a different enable logic and feedback scheme, so PCB layout and compensation network must be re-evaluated. Ensure the new regulator supports 550kHz switching frequency to avoid EMI conflicts with existing filters. Also verify that the replacement’s minimum on-time can support the 3V-to-2.5V conversion at full 3A load without pulse-skipping, which could increase output ripple beyond system tolerances.
Can the LM2853MH-2.5 safely operate near its 5.5V input maximum in a noisy automotive 12V system after a preregulator, and what protection circuitry is essential?
No—the LM2853MH-2.5 has an absolute maximum input of 5.5V, so it cannot be directly connected to a 12V automotive rail, even with a preregulator. If used after a pre-regulator (e.g., an LDO or buck converter), ensure tight voltage regulation (±2%) and include input transient suppression. A TVS diode (e.g., SMAJ5.0A) and a low-ESR ceramic capacitor (≥10µF) at the input are critical to clamp voltage spikes from load dumps or inductive coupling. Additionally, monitor thermal derating: at 5.5V input and 3A output, power dissipation reaches ~7.5W (assuming 90% efficiency), which may exceed safe limits in the 14-HTSSOP package without adequate copper pour or airflow, risking premature failure.
How does the synchronous rectification in the LM2853MH-2.5 impact efficiency and thermal design compared to non-synchronous alternatives like the LM2596HVS-2.5?
The LM2853MH-2.5’s integrated synchronous rectifier significantly improves efficiency—especially at high step-down ratios and light-to-mid loads—by replacing the lossy Schottky diode found in non-synchronous regulators like the LM2596HVS-2.5. This reduces conduction losses by up to 30%, lowering junction temperature and improving reliability in thermally constrained designs. However, this comes with tighter layout requirements: the SW node must be minimized to reduce ringing and EMI, and the PGND and AGND planes should be star-connected near the IC to avoid ground bounce. While the LM2596HVS-2.5 is more forgiving in layout, its lower efficiency (~75% vs. ~90% for LM2853MH-2.5 at 3A) makes it unsuitable for battery-powered or high-density applications where thermal headroom is limited.
What layout considerations are critical when designing with the LM2853MH-2.5 in a compact 2-layer PCB to avoid instability or overheating?
For stable operation on a 2-layer board, prioritize a solid ground plane under the LM2853MH-2.5 and minimize loop areas in the high-di/dt paths: input capacitor → VIN pin → SW pin → inductor → output capacitor. Place the input ceramic capacitor (10µF X5R/X7R) within 5mm of the VIN and GND pins. Use wide, short traces for SW and ensure the feedback trace (FB pin) is routed away from noisy nodes like SW or inductor. Thermal vias under the exposed pad are essential—even on 2-layer boards—to conduct heat to the bottom copper. Without proper thermal management, the junction temperature can exceed 125°C at 3A load, triggering thermal shutdown. Avoid splitting the ground plane; instead, use a unified ground with a single-point connection to the system ground to prevent ground loops and noise coupling.
Is the LM2853MH-2.5 suitable for always-on industrial sensors powered by a 3.3V rail, and how does its quiescent current affect battery life?
The LM2853MH-2.5 is not ideal for always-on, battery-powered sensor nodes due to its relatively high quiescent current (~1–2mA typical), which dominates power consumption at light loads. While it can regulate from a 3.3V input down to 2.5V, the efficiency drops significantly below 500mA load, making it inefficient for sleep-mode-dominated applications. For such use cases, consider ultra-low-IQ alternatives like the TPS62840 (180nA IQ) or TLV62569 (350nA IQ). However, if your system draws consistent 1A+ loads and prioritizes transient response over standby efficiency, the LM2853MH-2.5 remains viable—just ensure the 3V minimum input is maintained under all conditions, including battery discharge curves, to avoid dropout and instability.
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LM2853MH-2.5 CAD Models
Texas Instruments LM2853MH-2.5 PCB symbols & footprints
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