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TPS71718DCKT
Texas Instruments
IC REG LINEAR 1.8V 150MA SC70-5
885369 Pcs New Original In Stock
Linear Voltage Regulator IC Positive Fixed 1 Output 150mA SC-70-5
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5.0 / 5.0
- (465 Ratings)
TPS71718DCKT
Product Overview
1827700
DiGi Electronics Part Number
TPS71718DCKT-DGManufacturer
Texas Instruments
TPS71718DCKT
Description
IC REG LINEAR 1.8V 150MA SC70-5Inventory
885369 Pcs New Original In Stock
Linear Voltage Regulator IC Positive Fixed 1 Output 150mA SC-70-5
Quantity
Minimum 1
Minimum 1
Purchase and inquiry
Warranty & Returns
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TPS71718DCKT Technical Specifications
Category
Power Management (PMIC), Voltage Regulators - Linear, Low Drop Out (LDO) Regulators
Packaging
Cut Tape (CT) & Digi-Reel®
Series
-
Product Status
Active
Output Configuration
Positive
Output Type
Fixed
Number of Regulators
1
Voltage - Input (Max)
6.5V
Voltage - Output (Min/Fixed)
1.8V
Voltage - Output (Max)
-
Voltage Dropout (Max)
0.3V @ 150mA
Current - Output
150mA
Current - Quiescent (Iq)
80 µA
Current - Supply (Max)
100 µA
PSRR
70dB ~ 45dB (100Hz ~ 1MHz)
Control Features
Enable
Protection Features
Over Current, Over Temperature, Reverse Polarity, Under Voltage Lockout (UVLO)
Operating Temperature
-40°C ~ 125°C
Mounting Type
Surface Mount
Package / Case
5-TSSOP, SC-70-5, SOT-353
Supplier Device Package
SC-70-5
Base Product Number
TPS717
Datasheet & Documents
HTML Datasheet
TPS71718DCKT-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
TEXTISTPS71718DCKT
296-27044-1
296-27044-2
2156-TPS71718DCKT
TPS71718DCKT-DG
296-27044-6
Standard Package
250
Alternative Parts
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SUBSTITUTE TYPE
Reviews
5.0/5.0-(Show up to 5 Ratings)
de desembre 02, 2025
The robustness of their products has amazed me; they've maintained reliable performance even after extensive field use.
de desembre 02, 2025
Fast processing times meant I received my order sooner than expected.
de desembre 02, 2025
High-quality materials used in their products are evident at first touch.
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Frequently Asked Questions (FAQ)
Can the TPS71718DCKT be safely used as a drop-in replacement for the MAX8510EXK18+T in a low-power IoT sensor design, and what layout or thermal considerations should I evaluate before making the switch?
While the TPS71718DCKT and MAX8510EXK18+T are both 1.8V, 150mA LDOs in SC-70-5 packages, they are not fully pin-compatible due to differences in enable logic and quiescent current behavior. The TPS71718DCKT has an active-high enable pin with a typical 80 µA Iq, whereas the MAX8510EXK18+T uses a shutdown mode with lower standby current. Before substitution, verify your control logic levels and ensure the enable signal aligns. Additionally, although both are rated for -40°C to 125°C, the TPS71718DCKT’s slightly higher ground current may increase self-heating in compact layouts—ensure adequate copper pour under the SC-70-5 package and avoid routing high-current traces beneath it to prevent thermal coupling.
What are the real-world risks of operating the TPS71718DCKT near its 6.5V maximum input voltage in an industrial environment with voltage transients, and how can I protect it without degrading transient response?
Operating the TPS71718DCKT at or near 6.5V input in environments with inductive load switching or relay bounce introduces risk of voltage spikes exceeding its absolute maximum rating, potentially causing premature failure. Although it includes reverse polarity and over-temperature protection, it lacks integrated input overvoltage clamping. To mitigate this, place a low-capacitance TVS diode (e.g., SMAJ5.0A) close to the input pin and use a small series resistor (1–2 Ω) followed by a 1 µF ceramic capacitor to dampen transients. Avoid large bulk capacitors directly at the input unless ESR-controlled, as inrush currents during hot-plug events can stress the internal pass transistor.
How does the PSRR performance of the TPS71718DCKT compare to other ultra-low-Iq LDOs like the TPS7A02 when filtering noise from a switched-mode power supply in a sensitive RF receiver circuit?
The TPS71718DCKT offers 70dB PSRR at 100Hz, which is excellent for low-frequency ripple, but drops to ~45dB at 1MHz—significantly lower than the TPS7A02’s 60dB+ across the same range. In RF applications where SMPS noise extends into the MHz band, this reduced high-frequency rejection may allow residual ripple to couple into sensitive analog stages. If your design relies on post-regulator filtering for a PLL or LNA, consider adding a π-filter (ferrite bead + 100nF caps) before the TPS71718DCKT or evaluate the TPS7A02 for better broadband noise suppression, despite its slightly larger package.
Is it safe to parallel two TPS71718DCKT regulators to increase output current beyond 150mA in a space-constrained wearable device, and what are the stability and current-sharing risks?
Paralleling TPS71718DCKT devices is not recommended due to lack of current-sharing mechanisms and tight output voltage tolerances (±2% typ). Even minor mismatches in output voltage can cause one regulator to source most of the load current, leading to localized overheating and potential thermal runaway. The SC-70-5 package has limited thermal dissipation, exacerbating this risk. Instead, select a single higher-current LDO like the TPS79333 (300mA in SOT-23) or use a small DC-DC converter with integrated soft-start and current limit. If you must parallel, add 0.5–1Ω ballast resistors in series with each output and ensure symmetrical PCB layout—but this still doesn’t guarantee reliability under dynamic loads.
Can the TPS71718DCKT maintain regulation during brownout conditions when powered by a lithium coin cell that decays below 2.1V, and how does its UVLO behavior affect system startup?
The TPS71718DCKT has a typical UVLO threshold of 1.8V (min 1.6V), meaning it may continue operating as the coin cell voltage drops toward end-of-life—but only if the input remains above 1.8V + dropout (0.3V @ 150mA = 2.1V minimum). In practice, as the cell decays below ~2.3V under load, output regulation becomes unstable. Unlike some LDOs with hysteresis, the TPS71718DCKT may exhibit oscillation during slow voltage ramps. For battery-powered designs, add a supervisor IC (e.g., TPS3839) to reset the system cleanly before UVLO triggers, preventing erratic behavior. Also, derate output current to ≤100mA to reduce dropout and extend usable battery life.
Quality Assurance (QC)
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TPS71718DCKT CAD Models
Texas Instruments TPS71718DCKT PCB symbols & footprints
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