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TPS7418D
Texas Instruments
IC REG LINEAR 1.8V 200MA 8SOIC
2198 Pcs New Original In Stock
Linear Voltage Regulator IC Positive Fixed 1 Output 200mA 8-SOIC
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5.0 / 5.0
- (194 Ratings)
TPS7418D
Product Overview
1832552
DiGi Electronics Part Number
TPS7418D-DGManufacturer
Texas Instruments
TPS7418D
Description
IC REG LINEAR 1.8V 200MA 8SOICInventory
2198 Pcs New Original In Stock
Linear Voltage Regulator IC Positive Fixed 1 Output 200mA 8-SOIC
Quantity
Minimum 1
Minimum 1
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TPS7418D Technical Specifications
Category
Power Management (PMIC), Voltage Regulators - Linear, Low Drop Out (LDO) Regulators
Packaging
Tube
Series
-
Product Status
Active
Output Configuration
Positive
Output Type
Fixed
Number of Regulators
1
Voltage - Input (Max)
7V
Voltage - Output (Min/Fixed)
1.8V
Voltage - Output (Max)
-
Voltage Dropout (Max)
-
Current - Output
200mA
Current - Quiescent (Iq)
115 µA
Current - Supply (Max)
1.5 mA
PSRR
55dB (100Hz)
Control Features
Enable
Protection Features
Over Current, Over Temperature, Reverse Polarity
Operating Temperature
-40°C ~ 125°C
Mounting Type
Surface Mount
Package / Case
8-SOIC (0.154", 3.90mm Width)
Supplier Device Package
8-SOIC
Base Product Number
TPS7418
Datasheet & Documents
HTML Datasheet
TPS7418D-DG
Environmental & Export Classification
RoHS Status
ROHS3 Compliant
Moisture Sensitivity Level (MSL)
1 (Unlimited)
REACH Status
REACH Unaffected
ECCN
EAR99
HTSUS
8542.39.0001
Additional Information
Other Names
296-2669-5-NDR
-TPS7418DG4
-296-2669-5-DG
-296-2669-5-NDR
TEXTISTPS7418D
-TPS7418D-NDR
2156-TPS7418D
296-2669-5
-296-2669-5
-TPS7418DG4-NDR
Standard Package
75
Alternative Parts
PART 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
항상 빠른 출하와 우수한 제품 품질에 감탄합니다.
de desembre 02, 2025
Schönes Einkaufserlebnis bei DiGi Electronics! Die Preise sind äußerst attraktiv, und die Webseite ist super intuitiv.
de desembre 02, 2025
Post-purchase support was incredibly attentive, making me feel valued as a customer.
de desembre 02, 2025
The company’s dedication to customer satisfaction is evident in their support.
de desembre 02, 2025
Quick dispatch and reliable quality make every purchase a positive experience.
de desembre 02, 2025
Their combination of affordability and support quality sets them apart.
de desembre 02, 2025
The website is very user-centric, with features that make navigation effortless.
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Frequently Asked Questions (FAQ)
Can the TPS7418D replace an LP2985AIM5-1.8 in a battery-powered sensor node without requiring PCB layout changes, and what are the key reliability trade-offs?
The TPS7418D can serve as a functional replacement for the LP2985AIM5-1.8 in many low-power applications due to similar 1.8V fixed output and 200mA current capability, but critical differences exist. The TPS7418D comes in an 8-SOIC package versus the SOT-23-5 of the LP2985, so direct drop-in replacement isn't possible without layout modifications. More importantly, the TPS7418D has a higher quiescent current (115 µA vs. ~65 µA), which reduces battery life in always-on sensor nodes. However, it offers superior protection features including reverse polarity protection—absent in the LP2985—making it more robust in field-deployed or user-serviceable systems. If board space allows and extended battery life is less critical than fault tolerance, the TPS7418D is a safer long-term choice.
What input voltage margin should I maintain above 1.8V when using the TPS7418D in an industrial environment with voltage transients, and how does dropout voltage uncertainty affect this?
Although the TPS7418D’s datasheet doesn’t specify a maximum dropout voltage, typical linear regulators of this class exhibit ~200–300mV dropout at 200mA load. In industrial settings with supply rail noise or brownouts, maintain at least 500mV headroom above 1.8V (i.e., ≥2.3V input) to ensure regulation under worst-case conditions. Additionally, the device lacks explicit dropout specs, so empirical validation under full load and temperature swing (-40°C to 125°C) is recommended. Relying solely on nominal values risks intermittent shutdown during transient dips—especially problematic in motor-driven or relay-heavy environments where input rails can sag below expected levels.
Is the TPS7418D suitable for powering a microcontroller in a always-on automotive telematics module, considering its quiescent current and thermal performance in a sealed enclosure?
The TPS7418D’s 115 µA quiescent current is acceptable for many automotive always-on applications, but thermal management in a sealed enclosure requires careful analysis. At 200mA load with a 5V input (3.2V dropout), power dissipation reaches 640mW. In an 8-SOIC package without a heatsink and restricted airflow, junction temperature can exceed 125°C in ambient temperatures above 85°C—pushing the device toward thermal shutdown. Use a copper pour under the thermal pad and consider reducing input voltage via a pre-regulator if possible. For ultra-low-power telematics, compare against alternatives like the TPS7A20 (10 µA Iq), but if robustness and integrated reverse polarity protection are priorities, the TPS7418D remains viable with proper thermal design.
How does the enable pin on the TPS7418D behave during power-up sequencing with a 3.3V logic controller, and what risks arise if the enable signal floats during startup?
The TPS7418D’s enable pin is active-high and compatible with 3.3V logic levels, but it lacks an internal pull-down resistor. If the enable pin is left floating during system power-up—common when MCU GPIOs are in high-impedance state—the regulator may turn on unpredictably, causing out-of-sequence power delivery that can latch up downstream ICs or corrupt firmware loading. Always tie the enable pin to a defined logic level via a 10kΩ pull-down resistor if not actively driven. Additionally, ensure the enable signal asserts only after the input supply is stable (>2.5V) to avoid partial activation, which can stress the internal pass transistor and reduce long-term reliability.
Can I parallel two TPS7418D regulators to increase output current beyond 200mA for a high-pulse-load application, and what are the failure modes if I attempt this without current-sharing circuitry?
Paralleling TPS7418D devices without active current-sharing mechanisms is strongly discouraged. Even minor mismatches in output voltage (due to manufacturing tolerance or thermal gradients) cause one regulator to source most of the load current, potentially exceeding its 200mA limit and triggering overcurrent or thermal shutdown. During pulsed loads, this imbalance worsens due to differing transient responses. Instead of paralleling, select a higher-current LDO like the TPS7A4700 (1A) or use a small DC-DC pre-regulator followed by the TPS7418D for noise-sensitive rails. If space constraints force parallel use, add ballast resistors (e.g., 0.5Ω, 1% tolerance) in series with each output—but this reduces efficiency and increases dropout, negating the benefits of a low-Iq LDO.
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TPS7418D CAD Models
Texas Instruments TPS7418D PCB symbols & footprints
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