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Texas Instruments TPS77418DGK
- Part No.:
- TPS77418DGK
- Manufacturer:
- Texas Instruments
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
TPS77418DGK.pdf
- Description:
- IC REG LINEAR 1.8V 250MA 8VSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:299
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Product details
Overview
TPS77418DGK from Texas Instruments is a 250-mA, 1.8-V fixed-output low-dropout (LDO) voltage regulator in an 8-pin MSOP (DGK) package, featuring an open-drain power-good (PG) output, 92-µA quiescent current, 55-µVrms output noise without external bypass capacitor, and 2% output voltage tolerance over line/load/temperature. It powers precision analog rails in battery-operated instrumentation.
For engineers reviewing the TPS77418DGK datasheet, TPS77418DGK pinout, TPS77418DGK application, or TPS77418DGK equivalent, key selection criteria include PG threshold accuracy (82% VOUT), dropout voltage at full load (200 mV for 3.3-V variant; 270 mV for 2.8-V; TPS77418DGK specified per family data), thermal shutdown (144°C), and compatibility with 1-µF low-ESR ceramic output capacitors.
Technical Context
The TPS77418DGK uses a PMOS pass element enabling low dropout (proportional to load current) and ultra-low, load-independent quiescent current. Its internal 1.183-V reference feeds a high-gain error amplifier driving the pass transistor, with fast transient response optimized for step-load changes up to 250 mA.
Power-good monitoring is implemented via an internal comparator comparing VOUT against 82% of nominal output; PG asserts low when VOUT falls below threshold and releases high-impedance when VOUT recovers above 82%, with hysteresis of 0.5% VOUT. Enable logic is active-low, placing device in <1-µA standby when EN = high.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output voltage | Fixed 1.8 V ±2% over line, load, and –40°C to 125°C junction temperature |
| Max output current | 250 mA continuous; internally current-limited to 0.9–1.3 A peak |
| Quiescent current | 92 µA typical at full 250-mA load; drops to ≤3 µA in shutdown |
| Output noise | 55 µVrms (300 Hz–100 kHz), measured on TPS77418DGK with no external filter capacitor |
| Dropout voltage | 270 mV typical at 250 mA for 2.8-V variant; TPS77418DGK dropout follows family trend (200–330 mV range) |
| Power-good threshold | 82% VOUT (1.476 V) with 0.5% VOUT hysteresis; open-drain, requires external pullup |
| Enable polarity | Active-low: device enabled when EN ≤ 0.7 V; disabled when EN ≥ 2 V |
Pinout & Package
TPS77418DGK is housed in an 8-pin MSOP (DGK) package - 3.0 mm × 3.0 mm × 1.0 mm body, 0.65 mm pitch - with exposed thermal pad (not electrically connected).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (FB/SENSE) | Feedback input | Connects to internal resistor divider for adjustable variants; for fixed-output TPS77418DGK, tied directly to OUT for sensing |
| 2 (PG) | Power-good output | Open-drain active-high status signal; requires external pullup resistor to monitor regulated output health |
| 3 (EN) | Enable input | Active-low logic control: drives device into <1-µA shutdown when pulled high (≥2 V) |
| 4 (GND) | Regulator ground | Reference node for all internal circuitry and output return path |
| 5,6 (IN) | Input voltage supply | Dual pins reduce trace resistance and improve thermal performance; accepts 2.7–10 V input |
| 7,8 (OUT) | Regulated output | Dual pins lower output impedance and enhance current delivery capability for 250-mA load |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low-noise regulation | 55 µVrms output noise without external bypass capacitor - eliminates BOM cost and board space for filtering |
| Stable with minimal capacitance | Operates with 1-µF low-ESR ceramic output capacitor - enables compact, low-profile designs |
| Fast transient response | Minimizes output droop during 250-mA load steps - critical for powering DSPs and ADCs with dynamic current demand |
| Integrated power-good monitoring | Accurate 82% VOUT threshold with hysteresis - provides reliable system-level power sequencing and fault detection |
| Thermal protection | 144°C junction shutdown with automatic recovery - prevents damage during sustained overload or poor heatsinking |
Applications
| Battery-Powered Instrumentation | Portable Medical Sensors |
|---|---|
Use Scenario: Powering 16-bit SAR ADCs and low-noise op-amps in handheld multimeters and environmental monitors. IC Role / Device Role / Timing Role: Primary 1.8-V analog rail LDO delivering clean, stable bias to precision signal chain components. Use Value: 55-µVrms noise floor preserves effective resolution; 2% tolerance ensures consistent gain calibration across temperature. | Use Scenario: Supplying microcontroller I/O banks and analog front-end ICs in wearable ECG patches. IC Role / Device Role / Timing Role: System power supervisor and regulated 1.8-V domain source with integrated PG for safe boot and brownout detection. Use Value: Open-drain PG output interfaces directly with MCU reset controllers; 92-µA quiescent current extends battery life in sleep mode. |
| Industrial IoT Edge Nodes | Low-Power FPGA Configuration |
Use Scenario: Providing core voltage to ARM Cortex-M4 MCUs and sub-GHz RF transceivers in wireless sensor nodes. IC Role / Device Role / Timing Role: Main 1.8-V supply with fast load transient response to handle burst-mode radio transmission current spikes. Use Value: Dual IN/OUT pins reduce IR drop and thermal resistance; 250-mA rating supports simultaneous MCU + radio operation. | Use Scenario: Delivering configuration voltage to Spartan-7 FPGA bank VCCO_IO during cold-start and reconfiguration cycles. IC Role / Device Role / Timing Role: Fixed 1.8-V LDO with PG output synchronized to FPGA INIT_B assertion and configuration completion. Use Value: PG deassertion confirms stable 1.8-V rail before releasing FPGA from reset - prevents configuration errors due to marginal supply. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS7A0518PDBVR | 200-mA rated, 25-µA IQ, 1.8-V fixed, SOT-23-5 package; no PG output | Lacks power-good monitoring; smaller footprint but lower current capacity | Select when PG is unnecessary and board space is constrained; verify 200-mA limit suffices for peak load |
| MCP1826T-1802E/DB | 300-mA rated, 120-µA IQ, 1.8-V fixed, SOT-23-5; includes PG output with 85% threshold | Higher current rating and different PG trip point (85% vs. 82%) | Choose for higher load margin or if 85% PG threshold aligns better with system brownout thresholds |
Compared with TPS77418DGK, TPS7A0518PDBVR offers lower quiescent current but omits PG and reduces output current, while MCP1826T-1802E/DB increases current headroom and retains PG functionality at a slightly higher trip threshold - both require PCB layout revision due to SOT-23-5 packaging.
Availability
TPS77418DGK is available at Aetrix Electronics and suitable for battery-powered instrumentation, portable medical sensors, and industrial IoT edge nodes requiring stable component supply, long-term lifecycle support, and guaranteed traceability.
Supply support for TPS77418DGK 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 company specializing in analog and embedded processing technologies, with leadership in power management ICs and precision analog solutions.
The TPS774xx family was designed for space-constrained, low-power systems needing accurate voltage regulation with integrated power-status monitoring - targeting portable, medical, and industrial applications where reliability and noise performance are critical.
FAQ
What is the power-good (PG) threshold voltage for TPS77418DGK?
The TPS77418DGK asserts its open-drain PG output low when the regulated 1.8-V output falls below 82% of nominal (1.476 V), with 0.5% VOUT hysteresis. PG releases to high-impedance when VOUT rises above this threshold. This behavior is confirmed in the SLVS281E datasheet Section 7, Electrical Characteristics, under "PG Trip threshold voltage".
Does TPS77418DGK require an external bypass capacitor to achieve its 55-µVrms noise specification?
No, TPS77418DGK achieves 55-µVrms output noise (300 Hz–100 kHz) without any external bypass capacitor - a key design feature documented in the SLVS281E datasheet Section 1, Features, and verified in Figure 8 (Output Spectral Noise Density). Adding a capacitor does not improve this spec and may risk instability if ESR is outside the validated region.
What is the recommended minimum output capacitance for stable operation of TPS77418DGK?
The TPS77418DGK requires a minimum 1-µF low-ESR ceramic output capacitor for stability, provided its ESR falls within the region shown in Figure 19 of SLVS281E. A 10-µF ceramic capacitor is also acceptable if its ESR meets the lower-bound requirement in Figure 18. Solid tantalum and aluminum electrolytic types are viable alternatives if ESR compliance is maintained.
How does the enable (EN) pin function on TPS77418DGK?
The EN pin on TPS77418DGK is active-low: the device operates normally when EN ≤ 0.7 V (logic low), and enters <3-µA shutdown mode when EN ≥ 2 V (logic high). This is specified in the SLVS281E datasheet Section 7, Electrical Characteristics, under "High level enable input voltage" and "Low level enable input voltage".
Is TPS77418DGK pin-compatible with other devices in the TPS774xx family?
Yes, all TPS774xx devices - including TPS77418DGK, TPS77433DGK, and TPS77450DGK - share identical 8-pin MSOP (DGK) packaging and pinout per the SLVS281E datasheet Figure on page 2 (TPS774xx DGK Package, Top View). This allows direct substitution within the same output voltage grade when thermal and electrical margins permit.
TPS77418DGK Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Packaging:
- Bulk
- Product Status:
- Active
- Output Configuration:
- Positive
- Output Type:
- Fixed
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 10V
- Voltage - Output (Min/Fixed):
- 1.8V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- -
- Current - Output:
- 250mA
- Current - Quiescent (Iq):
- 125 µA
- Current - Supply (Max):
- -
- PSRR:
- 55dB (1kHz)
- Control Features:
- Enable, Power Good
- Protection Features:
- Over Current, Over Temperature, Reverse Polarity
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-VSSOP
TPS77418DGK FAQ
1.How can I place an order for TPS77418DGK through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS77418DGK 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 TPS77418DGK reliable?
The price and inventory of TPS77418DGK are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS77418DGK is usually 5 days.
3.What payment methods are accepted for TPS77418DGK?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS77418DGK transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS77418DGK?
TPS77418DGK orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS77418DGK 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 TPS77418DGK?
For technical support, including TPS77418DGK datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS77418DGK requirements.
6.How does Aetrix verify that TPS77418DGK is sourced from the original manufacturer or authorized distributors?
All TPS77418DGK 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 TPS77418DGK meets industry standards.
7.What is the process for return or replacement of TPS77418DGK?
All TPS77418DGK units undergo pre-shipment inspection (PSI). If there is an issue with TPS77418DGK, 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 TPS77418DGK part is unused and in its original packaging.
Return procedure for TPS77418DGK:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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