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TPS72518KTTR
Texas Instruments
IC REG LIN 1.8V 1A DDPAK/TO263-5
3835 Pcs New Original In Stock
Linear Voltage Regulator IC Positive Fixed 1 Output 1A TO-263 (DDPAK-5)
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Minimum 1
Minimum 1
5.0 / 5.0
- (503 Ratings)
TPS72518KTTR
Product Overview
1848150
DiGi Electronics Part Number
TPS72518KTTR-DGManufacturer
Texas Instruments
TPS72518KTTR
Description
IC REG LIN 1.8V 1A DDPAK/TO263-5Inventory
3835 Pcs New Original In Stock
Linear Voltage Regulator IC Positive Fixed 1 Output 1A TO-263 (DDPAK-5)
Quantity
Minimum 1
Minimum 1
Purchase and inquiry
Warranty & Returns
How to Order
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TPS72518KTTR Technical Specifications
Category
Power Management (PMIC), Voltage Regulators - Linear, Low Drop Out (LDO) Regulators
Packaging
Tape & Reel (TR)
Series
-
Product Status
Last Time Buy
Output Configuration
Positive
Output Type
Fixed
Number of Regulators
1
Voltage - Input (Max)
6V
Voltage - Output (Min/Fixed)
1.8V
Voltage - Output (Max)
-
Voltage Dropout (Max)
0.32V @ 1A
Current - Output
1A
Current - Quiescent (Iq)
225 µA
Current - Supply (Max)
325 µA
PSRR
60dB (1kHz)
Control Features
Enable, Reset
Protection Features
Over Current, Over Temperature, Reverse Polarity, Under Voltage Lockout (UVLO)
Operating Temperature
-40°C ~ 125°C
Mounting Type
Surface Mount
Package / Case
TO-263-6, D2PAK (5 Leads + Tab), TO-263BA
Supplier Device Package
TO-263 (DDPAK-5)
Base Product Number
TPS72518
Datasheet & Documents
HTML Datasheet
TPS72518KTTR-DG
Environmental & Export Classification
RoHS Status
ROHS3 Compliant
Moisture Sensitivity Level (MSL)
2 (1 Year)
REACH Status
REACH Unaffected
ECCN
EAR99
HTSUS
8542.39.0001
Additional Information
Other Names
TPS72518KTTRG3
296-TPS72518KTTRDKR
296-TPS72518KTTR
296-TPS72518KTTRCT
2156-TPS72518KTTR
296-TPS72518KTDKR-DG
296-TPS72518KTDKR
296-TPS72518KTCT
296-TPS72518KTCT-DG
TEXTISTPS72518KTTR
TPS72518KTTR-DG
TPS72518KTTRG3-DG
Standard Package
500
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
Service et produits de qualité à un prix défiant toute concurrence. Très satisfait !
de desembre 02, 2025
Their support staff was knowledgeable and patient, guiding me through every step with confidence.
de desembre 02, 2025
Their focus on product diversity enhances competitive advantage and customer satisfaction.
de desembre 02, 2025
Their responsive after-sales team ensures that any issues are resolved promptly.
de desembre 02, 2025
I appreciate the high standards DiGi Electronics maintains in their manufacturing process.
de desembre 02, 2025
Excellent shipping speed and rapid responses from the support team enhance my experience.
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Frequently Asked Questions (FAQ)
Can I use the TPS72518KTTR as a drop-in replacement for the TPS72618KTTT in a 5V to 1.8V power rail design, and what risks should I consider due to its Last Time Buy status?
While the TPS72518KTTR and TPS72618KTTT are electrically similar fixed 1.8V, 1A LDOs in TO-263 packages with matching pinouts and thermal performance, the TPS72518KTTR is under Last Time Buy, meaning long-term availability is not guaranteed. If your design requires high-volume or long-life production, this poses a supply chain risk. You may proceed with the replacement if you secure sufficient inventory or qualify the TPS72618KTTT as a second source. However, always validate thermal performance under your specific load and ambient conditions, as layout differences can affect junction temperature despite similar specs.
What are the key thermal design constraints when using the TPS72518KTTR in a compact PCB layout with minimal copper pour, and how can I avoid overheating at full 1A load?
The TPS72518KTTR relies heavily on PCB copper for heat dissipation due to its surface-mount TO-263 package. At 1A output with a 5V input (3.2V dropout), power dissipation reaches 3.2W, which can cause junction temperatures to exceed safe limits without adequate thermal relief. To mitigate this, dedicate a large thermal pad connected to the tab with multiple vias to an internal or bottom-layer ground plane. Aim for at least 4 in² of 2 oz copper for passive cooling. Monitor real-world operating temperatures under worst-case ambient (125°C) and consider derating the output current if thermal resistance (θJA) exceeds 30°C/W in your layout.
How does the reverse polarity protection in the TPS72518KTTR work, and can I rely on it instead of adding an external blocking diode in automotive or industrial applications?
The TPS72518KTTR includes internal reverse polarity protection that prevents damage when input voltage is applied with incorrect polarity, but it is not a substitute for robust system-level protection in harsh environments like automotive or industrial systems. The internal circuitry can withstand brief reverse voltage events, but sustained reverse bias may still stress the device. For mission-critical designs, TI recommends adding an external Schottky diode or MOSFET-based ideal diode circuit upstream to handle higher energy transients and improve fault tolerance, especially when input sources are untrusted or subject to hot-plugging.
What are the risks of using the TPS72518KTTR in a battery-powered IoT device where quiescent current and shutdown behavior are critical, and how does it compare to the TPS74601PDRVR?
The TPS72518KTTR has a quiescent current of 225 µA, which is relatively high for always-on battery-powered IoT applications compared to ultra-low-Iq alternatives like the TPS74601PDRVR (33 µA typical). While the TPS72518KTTR supports an enable pin for shutdown, its shutdown current is not specified as ultra-low, potentially draining small batteries over time. If your device spends long periods in sleep mode, consider migrating to the TPS74601PDRVR, which offers better efficiency at light loads and lower leakage. However, if your system draws consistent current above 10 mA, the difference in total power loss may be negligible, making the TPS72518KTTR acceptable if already qualified.
Can the TPS72518KTTR safely drive capacitive loads above 10 µF without stability issues, and what output capacitor selection minimizes risk in noisy digital systems?
The TPS72518KTTR is stable with output capacitors as high as 22 µF, but stability depends on ESR and capacitor type. TI recommends using low-ESR ceramic capacitors (X5R or X7R) with a minimum of 4.7 µF and ESR between 0.1 Ω and 5 Ω. Avoid high-ESR tantalum capacitors unless carefully characterized, as they can cause oscillation. In noisy digital systems (e.g., FPGAs or processors), use a 10 µF ceramic capacitor placed close to the output pin, supplemented by bulk capacitance if needed. Always verify transient response and ripple on your actual PCB, as poor layout can introduce parasitic inductance that destabilizes the regulator despite correct capacitor selection.
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.
TPS72518KTTR CAD Models
Texas Instruments TPS72518KTTR PCB symbols & footprints
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