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Texas Instruments TPS77101QDGKRQ1
- Part No.:
- TPS77101QDGKRQ1
- Manufacturer:
- Texas Instruments
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
TPS77101QDGKRQ1.pdf
- Description:
- IC REG LIN POS ADJ 150MA 8VSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,486
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Product details
Overview
TPS77101QDGKRQ1 from Texas Instruments is an automotive-grade 150-mA adjustable-output LDO voltage regulator with integrated open-drain power-on reset (RESET) output, 8-pin MSOP (DGK) package, 115-mV typical dropout at 150 mA (3.3-V variant), 92-µA quiescent current, and ±2% output voltage tolerance over line/load/temperature. It serves as a primary power supply and system supervisor in battery-powered automotive control modules.
For engineers reviewing the TPS77101QDGKRQ1 datasheet, TPS77101QDGKRQ1 pinout, TPS77101QDGKRQ1 application, or TPS77101QDGKRQ1 equivalent, this page delivers verified technical context, validated pin functions, real-world application mappings, and confirmed alternative options for automotive-grade LDO selection - all grounded in TI's SLVS225D datasheet and Q1 qualification data.
Technical Context
The TPS77101QDGKRQ1 uses a PMOS pass element enabling ultra-low dropout (115 mV at 150 mA) and load-independent quiescent current (92 µA typ). Its internal 1.1834-V reference feeds a high-gain error amplifier that drives the pass transistor via a stable compensation network optimized for 1–10 µF ceramic or tantalum output capacitors.
It integrates a precision voltage monitor with 95% VOUT trip threshold and 220-ms reset delay, delivering open-drain RESET assertion during undervoltage events. The EN pin enables TTL-compatible shutdown (<1 µA standby), and FB/SENSE supports external resistor-divider programming from 1.5 V to 5.5 V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | 150 mA max - sufficient for powering microcontrollers, CAN transceivers, and sensor interfaces in automotive ECUs. |
| Dropout Voltage | 115 mV typ at 150 mA (3.3-V output) - enables operation from weak or aging 5-V rails down to ~3.4 V input. |
| Quiescent Current | 92 µA typ - extends battery life in always-on automotive modules such as body controllers and telematics. |
| Output Voltage Accuracy | ±2% over line, load, and temperature - ensures reliable logic-level compliance for 1.8-V/3.3-V digital subsystems. |
| Reset Threshold | 95% of regulated VOUT with 220-ms delay - provides clean, glitch-free processor reset during cold-crank or brownout conditions. |
| Noise Performance | 55 µVrms (10 Hz–100 kHz, no bypass cap) - eliminates need for external noise-filtering components in analog-sensor signal chains. |
| Operating Junction Temp | –40°C to +125°C - qualified per AEC-Q100 Grade 1 for under-hood and cabin-mounted automotive applications. |
Pinout & Package
TPS77101QDGKRQ1 is housed in an 8-pin MSOP (DGK) package - 3.0 mm × 3.0 mm, 0.65 mm pitch, exposed thermal pad (not electrically connected), RoHS-compliant and automotive-qualified.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1: FB/SENSE | Feedback input / sense node | Connects to external resistor divider for adjustable output; short trace required to avoid noise-induced regulation error. |
| 2: RESET | Open-drain reset output | Active-low, 220-ms delayed assertion on VOUT undervoltage; requires external pullup to system rail (e.g., 10 kΩ to 3.3 V). |
| 3: EN | Enable input | Logic-low active; pulls device into <1 µA shutdown state when high - enables low-power sleep modes in ECUs. |
| 4: GND | Regulator ground | Power and signal return; must be tied directly to low-impedance PCB ground plane adjacent to thermal pad. |
| 5,6: IN | Input voltage supply | Dual-input pins reduce IR drop and improve transient response; accepts 2.7 V to 10 V (min VI = VO + 1 V). |
| 7,8: OUT | Regulated output | Dual-output pins lower path resistance; supports 1.5–5.5 V adjustable output with 10 µF ceramic or 1 µF tantalum capacitor. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated Power-On Reset | 220-ms delay with 95% VOUT threshold - eliminates need for external supervisor IC in automotive MCU power sequencing. |
| PMOS Pass Element | Dropout proportional to IOUT, not load-dependent quiescent current - maintains efficiency across full 0–150 mA range. |
| Low-Noise Operation | 55 µVrms without external filter capacitor - reduces BOM count and PCB area in noise-sensitive ADC or RF front-end supplies. |
| Wide Output Capacitor Compatibility | Stable with 1 µF tantalum (low-ESR) or 10 µF ceramic - simplifies layout and supports cost-optimized capacitor selection. |
| AEC-Q100 Qualified | Grade 1 (–40°C to +125°C) with PPAP-ready documentation - meets functional safety requirements for ASIL-B systems. |
Applications
| Automotive Body Control Module (BCM) | Advanced Driver Assistance Systems (ADAS) Camera Power |
|---|---|
|
Use Scenario: Powers 3.3-V microcontroller, LIN transceiver, and door-lock actuator drivers in a vehicle body control unit operating from a 12-V battery with cold-crank dips to 6 V. IC Role / Device Role / Timing Role: Primary LDO regulator and system supervisor - delivers stable 3.3 V while asserting RESET during brownout to prevent MCU corruption. Use Value: 115-mV dropout allows continued operation below 7 V input; 220-ms RESET delay prevents spurious resets during transient dips. |
Use Scenario: Supplies clean 1.8-V bias to image sensor and ISP in a rear-view camera module mounted near exhaust heat sources. IC Role / Device Role / Timing Role: Low-noise, thermally robust LDO - regulates from 5-V domain while rejecting switching noise from DC-DC converters. Use Value: 55 µVrms noise avoids pixel artifacts; 125°C junction rating ensures reliability in high-ambient environments. |
| Automotive Telematics Control Unit (TCU) | Electric Power Steering (EPS) Sensor Interface |
|
Use Scenario: Provides 5.0-V and 3.3-V rails for GPS/GNSS receiver, cellular modem, and CAN FD controller in always-on telematics gateway. IC Role / Device Role / Timing Role: Dual-rail LDO source with enable-controlled power gating - shuts down non-critical subsystems during sleep mode. Use Value: 92-µA quiescent current minimizes parasitic drain; EN pin enables synchronized wake-up with ignition signal. |
Use Scenario: Powers torque and position sensors in EPS motor control assembly where EMI immunity and long-term stability are critical. IC Role / Device Role / Timing Role: Precision-adjustable LDO with ±2% accuracy - maintains sensor excitation voltage within ADC reference tolerance. Use Value: Adjustable output (1.5–5.5 V) supports multiple sensor types; thermal shutdown protects against motor-heat-induced failure. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS78033QDRVRQ1 | 300-mA output, 1.5-µA IQ, fixed 3.3-V output only; no RESET/PG function. | Lacks integrated reset supervision - requires external supervisor IC for system reset functionality. | Choose when higher current and ultra-low IQ are prioritized over built-in reset capability. |
| TLV70733QDSERQ1 | 300-mA output, 25-µA IQ, fixed 3.3-V output; includes active-high PG but no RESET delay. | PG asserts immediately at 92% VOUT; lacks programmable delay - unsuitable for cold-crank timing requirements. | Choose when fast power-good signaling is needed and 220-ms reset delay is not required. |
Compared with TPS77101QDGKRQ1, TPS78033QDRVRQ1 offers higher current and lower IQ but omits reset supervision, while TLV70733QDSERQ1 adds PG but removes the critical 220-ms delay - making TPS77101QDGKRQ1 uniquely suited for automotive cold-crank reset sequencing.
Availability
TPS77101QDGKRQ1 is available at Aetrix Electronics and suitable for automotive body control, ADAS camera power, telematics gateways, and EPS sensor interfaces requiring stable component supply with AEC-Q100 qualification and long-term production support.
Supply support for TPS77101QDGKRQ1 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 automotive electronics, with decades of automotive qualification expertise and broad power management portfolio.
The TPS771xx family was designed specifically for automotive applications requiring integrated reset supervision, low dropout, and wide-temperature operation - targeting engine control units, infotainment systems, and safety-critical electronic control modules.
FAQ
What is the minimum input voltage required for TPS77101QDGKRQ1 to regulate a 3.3-V output at 150 mA?
The minimum input voltage is calculated as VOUT + VDO = 3.3 V + 0.115 V = 3.415 V. Per the datasheet, VI(min) must also satisfy VO(typ) + 1 V = 4.3 V, so the higher value governs: 4.3 V is the practical minimum input for full-load 3.3-V regulation. Below this, dropout behavior begins and output voltage drops linearly with input.
Does TPS77101QDGKRQ1 require an external bypass capacitor for noise reduction?
No - TPS77101QDGKRQ1 achieves 55 µVrms output noise (10 Hz–100 kHz) without any external bypass capacitor, unlike most low-noise LDOs. This eliminates BOM cost and board space for filtering components while maintaining clean power for sensitive analog circuits.
How does the RESET output of TPS77101QDGKRQ1 behave during power-up and brownout events?
At power-up, RESET remains low until VOUT reaches 95% of its target voltage, then transitions to high-impedance after a precise 220-ms delay. During brownout, RESET asserts low immediately when VOUT falls below 95%, providing deterministic reset timing critical for automotive MCU reliability.
Can TPS77101QDGKRQ1 be used with ceramic output capacitors, and what ESR range is supported?
Yes - TPS77101QDGKRQ1 is stable with 10-µF ceramic capacitors having ESR between 0.01 Ω and 1 Ω (per Figures 19/21), or 1-µF tantalum capacitors with ESR < 0.1 Ω. X5R/X7R dielectrics are recommended; Y5U/Z5U are discouraged due to temperature-induced capacitance drift.
What is the thermal shutdown threshold and recovery behavior of TPS77101QDGKRQ1?
Thermal shutdown activates at 144°C junction temperature. Once triggered, the device disables output and RESET goes low. Recovery occurs automatically when junction temperature falls below ~130°C hysteresis threshold, restoring regulation without external intervention - protecting against sustained overloads in confined automotive enclosures.
TPS77101QDGKRQ1 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:
- 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:
- 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:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-VSSOP
TPS77101QDGKRQ1 FAQ
1.How can I place an order for TPS77101QDGKRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS77101QDGKRQ1 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 TPS77101QDGKRQ1 reliable?
The price and inventory of TPS77101QDGKRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS77101QDGKRQ1 is usually 5 days.
3.What payment methods are accepted for TPS77101QDGKRQ1?
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TPS77101QDGKRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS77101QDGKRQ1 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 TPS77101QDGKRQ1?
For technical support, including TPS77101QDGKRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS77101QDGKRQ1 requirements.
6.How does Aetrix verify that TPS77101QDGKRQ1 is sourced from the original manufacturer or authorized distributors?
All TPS77101QDGKRQ1 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 TPS77101QDGKRQ1 meets industry standards.
7.What is the process for return or replacement of TPS77101QDGKRQ1?
All TPS77101QDGKRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with TPS77101QDGKRQ1, 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 TPS77101QDGKRQ1 part is unused and in its original packaging.
Return procedure for TPS77101QDGKRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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