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Texas Instruments TPS73718DRBRM3
- Part No.:
- TPS73718DRBRM3
- Manufacturer:
- Texas Instruments
- Package:
- 8-VDFN Exposed Pad
- Datasheet:
-
TPS73718DRBRM3.pdf
- Description:
- 1A ultra-low-dropout voltage reg
- Quantity:
- Payment:
- Shipping:
Inventory:3,000
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Product details
Overview
TPS73718DRBRM3 from Texas Instruments is a 1A, low-dropout linear regulator with NMOS pass transistor topology, reverse current protection, and 1.8V fixed output voltage. It operates from 2.2V to 5.5V input, delivers ultra-low dropout (122mV typical at 1A, new silicon), ±1.5% overall accuracy over line/load/temperature, and stable regulation with ≥1μF ceramic output capacitor. It serves as point-of-load regulator for FPGA core supplies in portable industrial controllers.
For engineers reviewing the TPS73718DRBRM3 datasheet, TPS73718DRBRM3 pinout, TPS73718DRBRM3 application, or TPS73718DRBRM3 equivalent, this page provides verified electrical specifications, thermal metrics for VSON-8 (DRB) package, enable/shutdown behavior, noise-reduction design guidance, and validated alternative options for fixed 1.8V LDO replacement scenarios.
Technical Context
The TPS73718DRBRM3 uses an NMOS pass transistor in voltage-follower configuration, enabling reverse leakage current <0.1µA and insensitivity to output capacitor ESR. Its BiCMOS process yields low ground current (880µA at 1A, new silicon) and supports operation down to –40°C with thermal shutdown at 160°C.
It integrates a 4MHz charge pump to drive the NMOS gate above VOUT, eliminating body-diode conduction paths. The device features foldback current limiting (1.05–2.2A range), 20nA shutdown IQ, and 58dB PSRR at 100Hz - all optimized for post-regulation after switching converters in space-constrained battery-powered systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output voltage | Fixed 1.8V ±1.5% over line, load, and temperature (–40°C to 125°C) |
| Dropout voltage | 122mV typical at 1A (new silicon); enables operation with VIN as low as 1.922V |
| Input voltage range | 2.2V to 5.5V; minimum VIN = VOUT + VDO or 2.2V, whichever is greater |
| Ground pin current | 880µA at 1A output (new silicon); reduces power loss in high-current portable applications |
| Shutdown current | 20nA typical; supports ultra-low-power sleep modes in battery-backed systems |
| PSRR @ 100Hz | 58dB; suppresses ripple from upstream DC/DC converters feeding sensitive analog or RF circuitry |
| Thermal resistance θJA | 49.4°C/W (VSON-8 package); requires minimal PCB copper area for 1A continuous operation |
Pinout & Package
VSON-8 (DRB) package: 3mm × 3mm, exposed thermal pad (connected to GND), moisture sensitivity level 2.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN (Pin 6) | Unregulated input supply | Accepts 2.2V–5.5V; must be decoupled locally to minimize noise coupling into regulator control loop |
| OUT (Pin 1) | Regulated output | Delivers 1.8V; requires ≥1μF ceramic capacitor directly at pin for stability and transient response |
| GND (Pad + Pin 4) | Ground reference and thermal path | Exposed pad must be soldered to PCB ground plane for thermal performance and EMI reduction |
| NR/FB (Pin 3) | Noise reduction / feedback node | Fixed 1.8V version: NR pin accepts external capacitor to reduce output noise; not FB function |
| EN (Pin 5) | Enable control input | Active-high TTL/CMOS compatible; drives high (>1.7V) to enable, low (<0.5V) to enter 20nA shutdown |
| N/C (Pins 2, 7, 8) | No connection | Not internally bonded; must remain unconnected on PCB to avoid parasitic coupling or latch-up risk |
Key Features
| Feature | Design Value |
|---|---|
| Reverse current protection | Blocks backflow from VOUT to VIN when input is removed or falls below output, preventing system bus discharge |
| Ultra-low dropout | 122mV typical at 1A ensures usable headroom even with aging batteries or low-voltage rails like 2.5V |
| Stable with 1μF ceramic capacitor | Eliminates need for large, costly tantalum or electrolytic capacitors; reduces board area and BOM count |
| Low-noise operation | 27×VOUT µVRMS (10Hz–100kHz); reduced further with NR capacitor - critical for ADC reference or RF bias rails |
| Foldback current limit | Reduces short-circuit current as VOUT collapses, protecting both regulator and downstream circuitry during faults |
Applications
| Industrial PLC I/O Module Power | Portable Medical Sensor Node |
|---|---|
Use Scenario: Powers 1.8V FPGA configuration logic and ADC interface in DIN-rail mounted programmable logic controller modules. IC Role / Device Role / Timing Role: Point-of-load regulator delivering clean, stable 1.8V from 3.3V intermediate rail; provides reverse current isolation during hot-swap events. Use Value: 122mV dropout enables full 1.8V output even as 3.3V rail sags under load; 20nA shutdown extends backup battery life during maintenance mode. |
Use Scenario: Supplies 1.8V to ultra-low-power biosignal amplifier and BLE SoC in handheld ECG patch. IC Role / Device Role / Timing Role: Primary LDO for analog front-end and digital core; enabled only during measurement bursts to conserve energy. Use Value: 880µA ground current at 1A ensures >95% efficiency at peak sensor sampling; 1μF stability simplifies layout in tight wearable form factor. |
| Automotive Infotainment Core Rail | Test Equipment FPGA Board |
Use Scenario: Regulates 1.8V core supply for automotive-grade FPGA in head-unit display processor. IC Role / Device Role / Timing Role: Post-regulator cleaning ripple from buck converter; withstands –40°C to 125°C junction temperature. Use Value: 49.4°C/W θJA allows 1A operation without heatsink on 2-layer PCB; thermal shutdown prevents damage during prolonged high-temp operation. |
Use Scenario: Provides 1.8V to FPGA transceivers and memory interfaces on benchtop logic analyzer daughterboard. IC Role / Device Role / Timing Role: Low-noise, fast-transient LDO ensuring signal integrity for 1Gbps LVDS links. Use Value: 58dB PSRR at 100Hz attenuates switching noise from main 12V→3.3V supply; excellent load transient response maintains voltage within ±1% during burst traffic. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar fixed-output LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS73718DRVT | VSON-6 (DRV) package, 2mm × 2mm; higher θJA (67.3°C/W); same electrical specs and pinout compatibility for IN/OUT/GND/EN/NR | Better suited for ultra-dense layouts where footprint is prioritized over thermal margin at 1A | Select when board space is constrained and thermal derating to ~700mA is acceptable |
| TPS7A3701DRBR | 1% overall accuracy (vs 1.5%); higher cost; same 1A rating, 1.8V output, and VSON-8 package | Required where tighter output tolerance is mandated by system-level voltage margin analysis | Choose when ±1% absolute accuracy across temperature is non-negotiable for precision analog subsystems |
Compared with TPS73718DRBRM3, TPS73718DRVT trades thermal performance for smaller footprint, while TPS7A3701DRBR improves accuracy at higher cost - neither is pin-compatible drop-in replacement, but both serve overlapping 1.8V/1A LDO use cases with documented trade-offs.
Availability
TPS73718DRBRM3 is available at Aetrix Electronics and suitable for industrial PLCs, portable medical devices, automotive infotainment systems, and test equipment requiring stable component supply with guaranteed long-term sourcing.
Supply support for TPS73718DRBRM3 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Texas Instruments is a global semiconductor leader specializing in analog and embedded processing technologies, with decades of LDO design expertise and broad automotive/industrial qualification.
The TPS737 family was engineered for portable and battery-powered applications demanding ultra-low dropout, reverse current blocking, and minimal external components - targeting FPGA, DSP, and ASIC core rail regulation.
FAQ
What is the maximum output current capability of the TPS73718DRBRM3?
The TPS73718DRBRM3 is rated for 1A continuous output current under recommended operating conditions. Its internal foldback current limit activates between 1.05A and 2.2A depending on VOUT and temperature, providing fault protection without external components. Derating is required above 85°C ambient due to thermal limits of the VSON-8 package.
Does the TPS73718DRBRM3 require an external capacitor on the NR pin?
Yes - the TPS73718DRBRM3 includes an NR (noise reduction) pin that accepts an external capacitor to reduce output voltage noise. For example, a 10nF capacitor lowers RMS noise by ~3.2×. This pin is not present on adjustable versions, but is functional and recommended for optimal low-noise performance in the fixed 1.8V TPS73718DRBRM3.
Can the TPS73718DRBRM3 be used with input voltages below 2.2V?
No - the absolute minimum input voltage for the TPS73718DRBRM3 is 2.2V per datasheet specifications. Attempting to operate below this risks improper regulation or damage. For 1.8V output, minimum valid VIN is 1.8V + 122mV = 1.922V, but the 2.2V lower bound dominates and must be respected.
How does the enable pin (EN) behave during power sequencing?
The EN pin of the TPS73718DRBRM3 is active-high with TTL/CMOS thresholds: VIH ≥ 1.7V enables regulation, VIL ≤ 0.5V forces shutdown with 20nA quiescent current. EN must never float; tying it to IN is acceptable if always-enabled operation is desired. Fast turn-on time (431µs typical) supports controlled power-up sequences in multi-rail systems.
Is the TPS73718DRBRM3 RoHS compliant and halogen-free?
Yes - the TPS73718DRBRM3 is manufactured in accordance with TI's environmental standards, including RoHS Directive 2011/65/EU compliance and halogen-free packaging per IPC-4101 definition. Full material declarations and compliance documentation are available through TI's official product folder and export classification tools.
TPS73718DRBRM3 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-VDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Output Configuration:
- Positive
- Output Type:
- Fixed
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 1.8V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.25V @ 1A
- Current - Output:
- 1A
- Current - Quiescent (Iq):
- -
- Current - Supply (Max):
- 880 µA
- PSRR:
- 58dB ~ 37dB (100Hz ~ 1kHz)
- Control Features:
- Current Limit, Enable
- Protection Features:
- Over Current, Over Temperature, Reverse Current
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SON (3x3)
TPS73718DRBRM3 FAQ
1.How can I place an order for TPS73718DRBRM3 through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS73718DRBRM3 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for TPS73718DRBRM3 reliable?
The price and inventory of TPS73718DRBRM3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS73718DRBRM3 is usually 5 days.
3.What payment methods are accepted for TPS73718DRBRM3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS73718DRBRM3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS73718DRBRM3?
TPS73718DRBRM3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS73718DRBRM3 order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for TPS73718DRBRM3?
For technical support, including TPS73718DRBRM3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS73718DRBRM3 requirements.
6.How does Aetrix verify that TPS73718DRBRM3 is sourced from the original manufacturer or authorized distributors?
All TPS73718DRBRM3 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that TPS73718DRBRM3 meets industry standards.
7.What is the process for return or replacement of TPS73718DRBRM3?
All TPS73718DRBRM3 units undergo pre-shipment inspection (PSI). If there is an issue with TPS73718DRBRM3, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The TPS73718DRBRM3 part is unused and in its original packaging.
Return procedure for TPS73718DRBRM3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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