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Texas Instruments TPS77101DGKRG4
- Part No.:
- TPS77101DGKRG4
- Manufacturer:
- Texas Instruments
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
TPS77101DGKRG4.pdf
- Description:
- IC REG LIN POS ADJ 150MA 8VSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,368
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Product details
Overview
TPS77101DGKRG4 from Texas Instruments is an adjustable 150-mA low-dropout linear regulator with integrated open-drain power-on reset (RESET) output, 8-pin MSOP (DGK) package, 115-mV typical dropout at 150 mA (for 3.3-V variant), 92-µA quiescent current, and 220-ms reset delay - used in battery-powered microcontroller supply rails requiring precise voltage supervision.
For engineers reviewing the TPS77101DGKRG4 datasheet, TPS77101DGKRG4 pinout, TPS77101DGKRG4 application, or TPS77101DGKRG4 equivalent, key selection criteria include its programmable output range (1.5 V to 5.5 V), RESET threshold hysteresis (92–98% VO), thermal shutdown protection, compatibility with 1-µF low-ESR ceramic output capacitors, and ultralow-noise operation (55 µVrms) without external filtering.
Technical Context
The TPS77101DGKRG4 employs a PMOS pass element enabling dropout voltage directly proportional to load current and independent quiescent current (92 µA over 0–150 mA). Its internal 1.1834-V reference feeds a high-gain error amplifier that drives the pass transistor via feedback from the FB/SENSE pin.
Reset functionality uses an internal comparator monitoring regulated output voltage; RESET asserts low when VO drops below 92–98% of target, with 220-ms delay on release after recovery to ≥95% VO. Enable logic is active-low, placing device in <1-µA standby when EN = VI.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output current | 150 mA maximum - supports mid-power microcontrollers, sensors, and analog front-ends without thermal derating under typical PCB layout. |
| Dropout voltage | 115 mV typical at 150 mA (3.3-V variant) - enables regulation from 3.415 V input, critical for single-cell Li-ion or 3.3-V rail margining. |
| Quiescent current | 92 µA typical over full load range - extends battery life in always-on IoT nodes and portable instrumentation. |
| Reset delay | 220 ms fixed - ensures reliable processor initialization after power ramp, meeting ARM Cortex-M and MSP430 reset timing requirements. |
| Output noise | 55 µVrms (300 Hz–100 kHz) - eliminates need for external bypass capacitor, reducing BOM count and board area in noise-sensitive ADC/DAC supplies. |
| Output voltage range | 1.5 V to 5.5 V (adjustable via external resistor divider) - allows reuse across multiple voltage domains using same footprint. |
| Accuracy | ±2% over line, load, and temperature (–40°C to 125°C) - meets tight tolerance needs for precision analog circuitry and reference buffers. |
Pinout & Package
TPS77101DGKRG4 is housed in an 8-pin MSOP (DGK) package, 3.0 mm × 3.0 mm × 1.0 mm body, exposed pad optional, RoHS-compliant, rated for –40°C to 125°C junction temperature.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| FB/SENSE (Pin 1) | Feedback input | Connects to external resistor divider for adjustable output; senses regulated voltage for error amplifier - requires short, low-noise trace routing. |
| RESET (Pin 2) | Open-drain reset output | Active-low signal asserting during undervoltage; requires external pullup (e.g., 10 kΩ to VO) - initiates MCU reset or FPGA configuration hold. |
| EN (Pin 3) | Enable input | Active-low logic control; pulls high internally - enables system-level power sequencing and deep-sleep mode activation. |
| GND (Pin 4) | Regulator ground | Power and signal return path; must be connected to low-impedance ground plane adjacent to OUT and IN pins. |
| IN (Pins 5, 6) | Input voltage supply | Dual-input pins reduce trace resistance and improve current handling - accepts 2.7 V to 10 V input, including unregulated DC-DC outputs. |
| OUT (Pins 7, 8) | Regulated output | Dual-output pins lower effective ESR and improve transient response - connects directly to load and output capacitor (≥1 µF ceramic). |
Key Features
| Feature | Design Value |
|---|---|
| PMOS pass architecture | Enables ultra-low quiescent current independent of load - critical for battery longevity in maintenance-free edge devices. |
| Integrated 220-ms reset timer | Eliminates external RC timing components and associated drift - simplifies design and improves long-term reliability of reset assertion. |
| Stability with 1-µF ceramic capacitors | Reduces solution size and cost vs. traditional LDOs requiring ≥10-µF tantalum - compatible with space-constrained wearables and modules. |
| Thermal shutdown protection | Triggers at 144°C junction temperature - prevents damage during overload or poor heatsinking in enclosed industrial enclosures. |
| Low-noise operation (55 µVrms) | Meets noise floor requirements for 16-bit SAR ADCs and RF bias supplies without added filtering - improves SNR in mixed-signal systems. |
Applications
| Portable Medical Sensors | Industrial PLC I/O Modules |
|---|---|
Use Scenario: Continuous glucose monitor with Bluetooth LE radio and analog front-end. IC Role / Device Role / Timing Role: Adjustable LDO supplies 2.8 V to op-amp sensor interface and 3.0 V to BLE SoC; RESET ensures clean boot after coin-cell insertion. Use Value: 92-µA quiescent current extends 3-year battery life; 55-µVrms noise avoids ADC quantization errors in sub-100-µV physiological signals. | Use Scenario: DIN-rail mounted analog input module with isolated 4–20 mA receivers and microcontroller. IC Role / Device Role / Timing Role: Primary 3.3-V supply for MCU and ADC; RESET monitors rail integrity during brownout events caused by shared 24-V bus transients. Use Value: 220-ms reset delay prevents spurious resets during brief dips; ±2% accuracy maintains 12-bit measurement linearity across –25°C to 70°C ambient. |
| Automotive Body Control Units | Smart Energy Meters |
Use Scenario: Door module with LIN transceiver, LED drivers, and wake-on-LIN logic. IC Role / Device Role / Timing Role: 5.0-V LDO for LIN PHY; EN pin controlled by microcontroller to shut down peripheral supplies during sleep. Use Value: <1-µA standby current meets ISO 16750-2 quiescent drain limits; 115-mV dropout enables operation down to 5.115 V battery voltage. | Use Scenario: Revenue-grade meter with metrology ASIC, RTC, and NB-IoT modem. IC Role / Device Role / Timing Role: Dual-rail supply: 3.3 V for modem, 1.8 V for metrology core via resistor divider; RESET holds MCU in reset until stable 3.3 V is confirmed. Use Value: Programmable output eliminates need for multiple fixed-LDO SKUs; 1.5–5.5 V range supports future firmware upgrades requiring different core voltages. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS77201DGKR | Replaces RESET with open-drain Power-Good (PG) output; identical pinout, specs, and package - PG asserts high at 82% VO with no delay. | Used where system requires power-good indication instead of reset assertion (e.g., FPGA configuration enable, sequenced power-up). | Select TPS77201DGKR when supervisory logic needs early warning of impending undervoltage rather than hard reset. |
| MCP1826T-ADJE/DC | 150-mA adjustable LDO in SOT-23-5; 250-mV dropout at 150 mA, 120-µA IQ, no integrated reset - requires external supervisor IC. | Suitable for cost-sensitive, space-constrained designs where reset is handled separately or omitted. | Choose MCP1826T-ADJE/DC only if board area is critical and external reset generation is acceptable. |
Compared with TPS77201DGKR, TPS77101DGKRG4 provides deterministic reset timing essential for deterministic boot sequences; versus MCP1826T-ADJE/DC, it integrates supervision and reduces component count but occupies larger MSOP footprint.
Availability
TPS77101DGKRG4 is available at Aetrix Electronics and suitable for portable medical sensors, industrial PLC I/O modules, automotive body control units, and smart energy meters requiring stable component supply, long-lifecycle support, and guaranteed traceability.
Supply support for TPS77101DGKRG4 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 delivering analog, embedded processing, and connectivity solutions for industrial, automotive, and personal electronics markets.
The TPS771xx family was designed specifically for battery-powered and space-constrained applications needing integrated voltage regulation and power-supply supervision in a single 8-pin MSOP package.
FAQ
What output voltage range does the TPS77101DGKRG4 support?
The TPS77101DGKRG4 supports an adjustable output voltage range from 1.5 V to 5.5 V, set by an external resistor divider connected to the FB/SENSE pin. This flexibility allows one BOM item to serve multiple voltage rails - for example, configuring 2.8 V for an RF front-end or 3.3 V for a microcontroller - while maintaining ±2% accuracy across line, load, and temperature.
How does the RESET function operate in the TPS77101DGKRG4?
The RESET output of the TPS77101DGKRG4 is an open-drain, active-low signal that asserts when the regulated output voltage falls below 92–98% of its target value. After VO recovers to ≥95%, RESET releases with a fixed 220-ms delay. The TPS77101DGKRG4 requires an external pullup resistor (typically 4.7–10 kΩ to VO) to interface with standard logic inputs.
Can the TPS77101DGKRG4 operate with a 1-µF ceramic output capacitor?
Yes, the TPS77101DGKRG4 is stable with a minimum 1-µF ceramic output capacitor provided its ESR falls within the region specified in Figures 18–21 of the datasheet. This capability eliminates the need for larger, higher-ESR tantalum capacitors - reducing board area and cost while improving reliability in portable and high-vibration environments.
What is the quiescent current behavior of the TPS77101DGKRG4 under load and shutdown?
The TPS77101DGKRG4 draws 92 µA typical quiescent current across its full 0–150 mA output load range. When disabled via the active-low EN pin, quiescent current drops to ≤3 µA - enabling ultra-low-power sleep modes in battery-operated systems. This behavior is enabled by its PMOS pass transistor architecture, which decouples IQ from load current.
Does the TPS77101DGKRG4 require an input capacitor?
An input capacitor is not required for basic stability of the TPS77101DGKRG4. However, a 0.047-µF or larger ceramic bypass capacitor is recommended if the device is located more than a few inches from the power source - to improve high-frequency noise rejection and load transient response. This design choice simplifies layout while maintaining performance in compact PCBs.
TPS77101DGKRG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- 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:
- 150mA
- Current - Quiescent (Iq):
- 125 µA
- Current - Supply (Max):
- -
- PSRR:
- 60dB (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
TPS77101DGKRG4 FAQ
1.How can I place an order for TPS77101DGKRG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS77101DGKRG4 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 TPS77101DGKRG4 reliable?
The price and inventory of TPS77101DGKRG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS77101DGKRG4 is usually 5 days.
3.What payment methods are accepted for TPS77101DGKRG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS77101DGKRG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS77101DGKRG4?
TPS77101DGKRG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS77101DGKRG4 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 TPS77101DGKRG4?
For technical support, including TPS77101DGKRG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS77101DGKRG4 requirements.
6.How does Aetrix verify that TPS77101DGKRG4 is sourced from the original manufacturer or authorized distributors?
All TPS77101DGKRG4 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 TPS77101DGKRG4 meets industry standards.
7.What is the process for return or replacement of TPS77101DGKRG4?
All TPS77101DGKRG4 units undergo pre-shipment inspection (PSI). If there is an issue with TPS77101DGKRG4, 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 TPS77101DGKRG4 part is unused and in its original packaging.
Return procedure for TPS77101DGKRG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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