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Texas Instruments TPS77301DGK
- Part No.:
- TPS77301DGK
- Manufacturer:
- Texas Instruments
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
TPS77301DGK.pdf
- Description:
- IC REG LIN POS ADJ 250MA 8VSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:266
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Product details
Overview
TPS77301DGK from Texas Instruments is an adjustable 250-mA low-dropout (LDO) voltage regulator in an 8-pin MSOP (DGK) package, featuring integrated open-drain power-on reset with 220-ms delay, 92-µA quiescent current, and 55-µVrms output noise without external bypass capacitor. It operates over –40°C to 125°C and supports output programming from 1.5 V to 5.5 V for battery-powered DSP, microcontroller, and portable instrumentation systems.
For engineers reviewing the TPS77301DGK datasheet, TPS77301DGK pinout, TPS77301DGK application, or TPS77301DGK equivalent, key selection considerations include its adjustable output range, reset timing behavior, PMOS pass element architecture enabling ultra-low quiescent current independent of load, thermal shutdown protection, and compatibility with low-ESR ceramic (≥10 µF) or tantalum (≥1 µF) output capacitors.
Technical Context
The TPS77301DGK uses a PMOS pass transistor to achieve low dropout voltage (e.g., 200 mV at 250 mA for 3.3-V variants) and load-independent quiescent current (92 µA typ). Its internal 1.183-V reference feeds a feedback amplifier that compares FB/SENSE voltage against VREF to regulate output via resistor-divider programming.
It integrates a precision undervoltage detector monitoring regulated output: RESET asserts low when VOUT falls below 95% of target (±0.5% hysteresis), with 220-ms delay after VOUT reaches regulation. EN is active-low, disabling the regulator and reducing ground current to ≤3 µA.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | 250 mA max - supports moderate-power digital loads including microcontrollers and ADCs without external boost. |
| Dropout Voltage | 200 mV typ at 250 mA (for 3.3-V variant) - enables operation with minimal headroom, e.g., 3.5-V input for 3.3-V rail. |
| Quiescent Current | 92 µA typ over full load range - extends battery life in always-on sensor nodes and portable devices. |
| Output Noise | 55 µVrms (300 Hz–100 kHz) without external filter - eliminates need for noise-reduction capacitors in sensitive analog signal chains. |
| Reset Threshold | 95% of programmed VOUT ±0.5% hysteresis - provides reliable power-up sequencing and brownout detection for DSP/microprocessor systems. |
| Operating Temp | –40°C to 125°C junction - qualified for automotive under-hood and industrial control environments. |
| Input Voltage Range | 2.7 V to 10 V - compatible with single-cell Li-ion (4.2 V max), dual-cell alkaline, and 5-V system rails. |
Pinout & Package
TPS77301DGK is housed in an 8-pin MSOP (DGK) package, 3.0 mm × 3.0 mm × 1.05 mm, tape-and-reel compatible (suffix R: TPS77301DGKR). Pin 1 is marked with a dot; top view orientation matches TI standard DGK pinout for TPS773xx series.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (FB/SENSE) | Feedback input | Connects to external resistor divider (R1/R2) to set output voltage; high-impedance node requiring short, noise-free routing. |
| 2 (RESET) | Open-drain reset output | Active-low, 220-ms delayed assertion on undervoltage; requires external pullup for logic-level interface to MCU reset pin. |
| 3 (EN) | Enable input | Active-low logic control; TTL-compatible (VIL ≤ 0.7 V, VIH ≥ 2 V); pulls GND current to ≤3 µA in shutdown. |
| 4 (GND) | Regulator ground | Power and signal return path; must be low-impedance connection to minimize noise coupling into FB/SENSE. |
| 5, 6 (IN) | Input voltage supply | Dual-input pins reduce trace resistance and improve thermal performance; accepts 2.7–10 V DC input. |
| 7, 8 (OUT) | Regulated output | Dual-output pins lower effective ESR and improve transient response; connects to 1–10 µF output capacitor per stability requirements. |
Key Features
| Feature | Design Value |
|---|---|
| Adjustable Output Range | 1.5 V to 5.5 V via external resistor divider - enables single BOM for multiple voltage rails across product variants. |
| Integrated Power-On Reset | 220-ms delay with 95% VOUT threshold - eliminates need for discrete supervisor IC in space-constrained designs. |
| Low-Noise Operation | 55 µVrms without external filter capacitor - reduces component count and PCB area in RF, audio, and precision analog subsystems. |
| Thermal Shutdown Protection | 144°C trip temperature with hysteresis - prevents damage during overload or poor heatsinking in enclosed enclosures. |
| Stable with Low-ESR Capacitors | Supports 1 µF tantalum or 10 µF ceramic output caps - simplifies capacitor selection and avoids costly polymer or specialty low-ESR types. |
Applications
| Battery-Powered Microcontroller Systems | Portable Medical Instrumentation |
|---|---|
Use Scenario: Compact handheld glucose meter powered by two AA alkaline cells (3.0 V nominal) requiring stable 3.0-V supply for MCU, display driver, and analog front-end. IC Role / Device Role / Timing Role: Primary LDO regulator with programmable output and integrated reset for cold-start reliability and brownout recovery. Use Value: 92-µA quiescent current extends shelf life; 220-ms reset ensures deterministic boot after battery insertion; 55-µVrms noise avoids ADC quantization errors. |
Use Scenario: Wearable ECG patch with ultra-low-power ARM Cortex-M0+ MCU, 16-bit sigma-delta ADC, and Bluetooth LE radio operating from coin-cell battery. IC Role / Device Role / Timing Role: Adjustable LDO delivering 1.8 V to ADC and 3.3 V to radio via dual-rail configuration using external resistors. Use Value: Programmable output eliminates voltage-specific SKUs; low noise preserves SNR in biopotential measurement; thermal shutdown protects against skin-contact overheating. |
| Industrial Sensor Node | Automotive Body Control Module (BCM) |
Use Scenario: Wireless temperature/humidity sensor node deployed in factory environment, powered by 3.6-V Li-SOCl₂ primary cell with 10-year lifetime requirement. IC Role / Device Role / Timing Role: Always-on LDO supplying 3.3 V to ultra-low-power MCU and RF transceiver, with EN controlled by wake-up timer. Use Value: 1-µA shutdown current minimizes self-discharge; wide –40°C to 125°C rating ensures operation in unheated enclosures; fast transient response maintains rail stability during RF burst transmission. |
Use Scenario: Under-dash BCM powering CAN transceiver, EEPROM, and LED drivers from 12-V vehicle battery with load dump and cold-crank transients. IC Role / Device Role / Timing Role: Secondary LDO generating 5.0 V for legacy peripherals and 3.3 V for microcontroller core, with RESET used for system initialization after ignition. Use Value: 10-V absolute max input withstands load dump spikes; 250-mA output drives multiple loads; 2% output tolerance ensures CAN PHY compliance across temperature. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS76301DBVR | Same 250-mA output, but SOT-23-5 package; no integrated RESET; 170-µA quiescent current; fixed 3.3/5.0-V only. | Lacks power-on reset function; requires external supervisor for reset sequencing; smaller footprint but higher quiescent current. | Choose when board space is critical and reset functionality is implemented elsewhere. |
| MCP1826T-ADJE/DC | 250-mA adjustable LDO in SOT-23-5; 120-µA quiescent current; no RESET; 1.8–6.0-V input; ±2% accuracy. | No integrated reset or power-good; wider input range but higher ground current; different pinout and enable polarity (active-high). | Prefer when sourcing from Microchip ecosystem or needing >6-V input capability, but accept added external supervision. |
Compared with TPS77301DGK, TPS76301DBVR offers smaller size but sacrifices reset integration and ultra-low quiescent current, while MCP1826T-ADJE/DC provides broader input range but lacks fault-monitoring features and increases design complexity with external reset circuitry.
Availability
TPS77301DGK is available at Aetrix Electronics and suitable for battery-powered microcontrollers, portable medical instrumentation, industrial sensor nodes, automotive body control modules, and low-noise analog subsystems requiring stable component supply and long-term manufacturability.
Supply support for TPS77301DGK 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, embedded processing, and power management technologies, with decades of expertise in high-reliability LDO design for industrial and automotive markets.
The TPS773xx family was engineered for space-constrained, battery-sensitive applications requiring integrated power supervision, ultra-low quiescent current, and low-noise regulation-targeting portable electronics, instrumentation, and automotive sub-systems.
FAQ
What output voltage range does the TPS77301DGK support?
The TPS77301DGK is an adjustable LDO supporting output voltages from 1.5 V to 5.5 V, set via an external resistor divider connected to the FB/SENSE pin. The internal 1.183-V reference and feedback amplifier enable precise regulation across this range, with 2% tolerance over line, load, and temperature conditions. This flexibility allows one TPS77301DGK design to serve multiple voltage rails without changing the regulator IC.
How does the RESET function operate on the TPS77301DGK?
The TPS77301DGK's RESET pin is an open-drain, active-low output that monitors the regulated output voltage. When VOUT drops below 95% of its target value, RESET pulls low after hysteresis; upon power-up, it remains low for 220 ms after VOUT reaches 95%, then goes high-impedance. This behavior provides reliable microprocessor reset signaling without external timing components, and requires only a pullup resistor to the host supply rail.
What capacitor values are required for stable operation of the TPS77301DGK?
The TPS77301DGK requires a minimum 1-µF tantalum or 10-µF ceramic output capacitor with ESR meeting stability criteria shown in Figures 18–21 of the datasheet. Input capacitance is optional but recommended (≥0.047 µF) if the device is located >2 inches from the source. No bypass capacitor is needed for noise reduction-the 55-µVrms noise spec is achieved without external filtering.
Can the TPS77301DGK be used in automotive applications?
Yes, the TPS77301DGK is rated for operation from –40°C to 125°C junction temperature and has 10-V maximum input voltage, making it suitable for automotive body electronics such as BCMs and sensor modules. Its thermal shutdown (144°C) and robust ESD rating (2 kV HBM) further support under-hood and dashboard environments, though system-level qualification per AEC-Q100 remains the responsibility of the end designer.
What is the quiescent current behavior of the TPS77301DGK under load and shutdown?
The TPS77301DGK draws 92 µA typical quiescent current across its full 0–250 mA output load range-a key advantage of its PMOS pass element. When disabled via the active-low EN pin, ground current drops to ≤3 µA at 25°C, enabling ultra-low-power sleep modes in battery-operated systems. This load-invariant biasing directly improves runtime in always-on IoT endpoints and portable diagnostics equipment.
TPS77301DGK 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:
- Adjustable
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 10V
- Voltage - Output (Min/Fixed):
- 1.5V
- Voltage - Output (Max):
- 5.5V
- Voltage Dropout (Max):
- -
- Current - Output:
- 250mA
- Current - Quiescent (Iq):
- 125 µA
- Current - Supply (Max):
- -
- PSRR:
- 55dB (1kHz)
- Control Features:
- Enable, Reset
- 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
TPS77301DGK FAQ
1.How can I place an order for TPS77301DGK through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS77301DGK 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 TPS77301DGK reliable?
The price and inventory of TPS77301DGK are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS77301DGK is usually 5 days.
3.What payment methods are accepted for TPS77301DGK?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS77301DGK transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS77301DGK?
TPS77301DGK orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS77301DGK 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 TPS77301DGK?
For technical support, including TPS77301DGK datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS77301DGK requirements.
6.How does Aetrix verify that TPS77301DGK is sourced from the original manufacturer or authorized distributors?
All TPS77301DGK 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 TPS77301DGK meets industry standards.
7.What is the process for return or replacement of TPS77301DGK?
All TPS77301DGK units undergo pre-shipment inspection (PSI). If there is an issue with TPS77301DGK, 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 TPS77301DGK part is unused and in its original packaging.
Return procedure for TPS77301DGK:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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