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LM2853MH-1.8
Texas Instruments
IC REG BUCK 1.8V 3A 14HTSSOP
1265 Pcs New Original In Stock
Buck Switching Regulator IC Positive Fixed 1.8V 1 Output 3A 14-PowerTSSOP (0.173", 4.40mm Width)
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5.0 / 5.0
- (135 Ratings)
LM2853MH-1.8
Product Overview
1296802
DiGi Electronics Part Number
LM2853MH-1.8-DGManufacturer
Texas Instruments
LM2853MH-1.8
Description
IC REG BUCK 1.8V 3A 14HTSSOPInventory
1265 Pcs New Original In Stock
Buck Switching Regulator IC Positive Fixed 1.8V 1 Output 3A 14-PowerTSSOP (0.173", 4.40mm Width)
Quantity
Minimum 1
Minimum 1
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LM2853MH-1.8 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)
1.8V
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-1.8-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
Alternative Parts
View DetailsPART NUMBER
MANUFACTURER
QUANTITY AVAILABLE
DiGi PART NUMBER
UNIT PRICE
SUBSTITUTE TYPE
Reviews
5.0/5.0-(Show up to 5 Ratings)
de desembre 02, 2025
홈페이지 내 다양한 고객 지원 채널 덕분에 필요할 때 언제든 도움받았어요.
de desembre 02, 2025
Die zügige Versandabwicklung bei DiGi Electronics ist für mich ein klarer Vorteil gegenüber anderen Anbietern.
de desembre 02, 2025
Every purchase from DiGi arrives on time, reflecting their strong logistics network.
de desembre 02, 2025
The customer support team at DiGi Electronics is incredibly responsive; they address our technical issues promptly and thoroughly.
de desembre 02, 2025
DiGi Electronics provides a comprehensive range of options, accommodating various preferences and needs.
de desembre 02, 2025
I am thoroughly impressed with DiGi Electronics' punctual shipping. My orders always arrive exactly on time, if not earlier.
de desembre 02, 2025
The level of support they provide affirms their commitment to quality.
de desembre 02, 2025
Their customer support team is prompt, courteous, and very helpful whenever I have questions.
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Frequently Asked Questions (FAQ)
Can the LM2853MH-1.8 be used in a new design given its obsolete status, and what are the long-term supply chain risks?
The LM2853MH-1.8 is marked as obsolete by Texas Instruments, which means it is no longer recommended for new designs due to high long-term supply chain risk. Although currently in stock (1228 units available), future availability cannot be guaranteed, and TI will not restart production. For new designs, consider upgrading to a pin-compatible and functionally equivalent replacement such as the LMZ12030 or LMZ20503, which offer improved efficiency and active support. If you must use the LM2853MH-1.8, secure lifetime buys and verify second-source availability to mitigate discontinuation risks in production ramp-ups or field repairs.
How does the LM2853MH-1.8 handle thermal dissipation in high ambient temperature environments, and what PCB layout practices should be followed?
The LM2853MH-1.8 operates up to 125°C junction temperature, but at 3A output and 550kHz switching, power dissipation in the internal MOSFETs and inductor can cause thermal buildup, especially with 5.5V input. To ensure reliability, use a 4-layer PCB with a dedicated thermal pad connected to an internal copper plane using multiple vias. Keep switching node traces short and minimize ground loop areas. Without proper thermal design, sustained loads above 2.5A may trigger thermal shutdown. Simulate worst-case power loss and verify with IR imaging during prototype testing.
Is the LM2853MH-1.8 synchronous rectification sufficient to eliminate the need for external Schottky diodes in low-noise applications?
Yes, the LM2853MH-1.8 includes integrated synchronous rectification, eliminating the need for external Schottky diodes and improving efficiency, especially under light to medium loads. However, in noise-sensitive applications like ADC or RF biasing, the 550kHz switching frequency may couple into analog circuits. To reduce noise, add a small LC filter (e.g., 1μH shielded inductor + 10μF ceramic) on the output and ensure the input supply is well-decoupled with 10μF X5R and 0.1μF ceramic capacitors close to VIN and PGND pins. Monitor output ripple with a 200MHz bandwidth scope to validate noise performance.
What are the main design-in trade-offs when replacing the LM2853MH-1.8 with the LM2853MH-1.8/NOPB variant?
While the LM2853MH-1.8/NOPB is listed as a substitute, the primary difference is that the NOPB variant is RoHS-compliant (lead-free), whereas the standard LM2853MH-1.8 is not. This affects solder reflow profiles—use a leaded profile for the non-RoHS version to prevent cold joints or tombstoning. The electrical and thermal performance are identical, but mixing variants in production complicates assembly and compliance tracking. For commercial or industrial designs targeting global markets, standardize on the NOPB version despite potential cost differences to ensure regulatory alignment and long-term supportability.
Can the LM2853MH-1.8 reliably power a 3A FPGA core rail during dynamic load transients, and how should output capacitance be selected?
The LM2853MH-1.8 is rated for 3A DC output, but FPGA core rails demand fast transient response during mode switches. The fixed 1.8V output and 550kHz frequency limit response speed compared to newer current-mode regulators. To handle dI/dt spikes, use at least 44μF of low-ESR ceramic output capacitance (e.g., four 10μF/6.3V X5R 0805 caps) near the load to minimize voltage droop. Simulate transient response using TINA-TI or SPICE models if available. For high-performance FPGAs like Spartan-7 or Cyclone IV, consider upgrading to a regulator with higher bandwidth, such as the TPS54334, to reduce risk of brownout during rapid load steps.
Quality Assurance (QC)
DiGi ensures the quality and authenticity of every electronic component through professional inspections and batch sampling, guaranteeing reliable sourcing, stable performance, and compliance with technical specifications, helping customers reduce supply chain risks and confidently use components in production.
LM2853MH-1.8 CAD Models
Texas Instruments LM2853MH-1.8 PCB symbols & footprints
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