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Texas Instruments TPS73101DBVRG4
- Part No.:
- TPS73101DBVRG4
- Manufacturer:
- Texas Instruments
- Package:
- SC-74A, SOT-753
- Datasheet:
-
TPS73101DBVRG4.pdf
- Description:
- IC REG LIN POS ADJ 150MA SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:1,335
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Product details
Overview
TPS73101DBVRG4 from Texas Instruments is a capacitor-free, NMOS-based 150mA low-dropout linear regulator with reverse current protection and adjustable output (1.2V–5.5V). It operates from 1.7V to 5.5V input, delivers 30mV typical dropout at 150mA, achieves ±0.5% initial accuracy and 30μVRMS output noise (10kHz–100kHz), and supports stable regulation without an output capacitor - ideal for space-constrained portable and noise-sensitive VCO power applications.
For engineers reviewing the TPS73101DBVRG4 datasheet, TPS73101DBVRG4 pinout, TPS73101DBVRG4 application, or TPS73101DBVRG4 equivalent, key selection criteria include ultra-low-noise operation, capacitor-free stability, reverse leakage <10µA, shutdown current <1µA, and compatibility with adjustable feedback networks using external resistors.
Technical Context
The TPS73101DBVRG4 uses an NMOS pass transistor driven by a 4MHz integrated charge pump to maintain gate voltage above VOUT, enabling sub-100mV dropout across its full 150mA load range. Its voltage-follower topology eliminates ESR dependency and permits zero-output-capacitor operation while retaining excellent transient response.
It features a dedicated FB pin (not NR) for adjustable output configuration, internal 1.204V reference with ±0.006V tolerance, and foldback current limiting that reduces output current to near-zero when VOUT drops below –0.2V - preventing startup failure under negative-bias conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output current | 150mA maximum continuous - sufficient for powering microcontrollers, sensors, and RF front-end bias rails. |
| Dropout voltage | 30mV typical at 150mA - enables regulation from 1.7V input down to 1.2V output with minimal headroom loss. |
| Output noise | 30μVRMS (10kHz–100kHz) - low enough for direct VCO and PLL supply without additional filtering. |
| Accuracy | ±0.5% initial, ±1% over line/load/temperature - ensures tight voltage control in precision analog and mixed-signal systems. |
| Shutdown current | <1µA max - preserves battery life in always-on or intermittent-power IoT and portable devices. |
| Input voltage range | 1.7V to 5.5V - compatible with single-cell Li-ion, LiFePO₄, and 3.3V/5V system rails. |
| Reference voltage | 1.204V (±0.006V) - sets output via external resistor divider; enables precise 1.2V–5.5V programmability. |
Pinout & Package
SOT-23-5 (DBV) package: 2.9mm × 2.8mm footprint, surface-mount, thermally enhanced with exposed pad (not electrically connected in DBV variant).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN (Pin 1) | Input supply connection | Accepts 1.7V–5.5V DC; no mandatory input capacitor, but optional CIN improves PSRR and source impedance. |
| GND (Pin 2) | Power ground reference | Common return path for IN, OUT, EN, and FB; must be low-impedance for noise and stability. |
| EN (Pin 3) | Enable control input | Active-high TTL/CMOS-compatible; drives regulator ON (≥1.7V) or OFF (<0.5V); draws ≤0.1µA when enabled. |
| FB (Pin 4) | Feedback node for output regulation | Connects to resistor divider (R1/R2) between OUT and GND; sets VOUT = 1.204V × (R1+R2)/R2; IFB = 0.1–0.3µA. |
| OUT (Pin 5) | Regulated output terminal | Delivers adjustable 1.2V–5.5V; stable without output capacitor; optional COUT improves transient response and noise. |
Key Features
| Feature | Design Value |
|---|---|
| Capacitor-free stability | Operates reliably with zero output capacitance - eliminates BOM cost, board area, and aging/failure risks of output caps. |
| Reverse current blocking | Leakage <10µA from OUT to IN when EN = low - prevents backfeed in multi-rail or hot-swap systems. |
| Ultra-low-noise architecture | 30μVRMS (10kHz–100kHz) with no CNR; reduced further with CFB on FB pin - suitable for RF and timing-critical loads. |
| Advanced NMOS + charge pump | 4MHz integrated charge pump drives NMOS gate above VOUT - enables 30mV dropout and eliminates PNP/PFET limitations. |
| Thermal & foldback protection | Thermal shutdown at 160°C; foldback current limit activates below –0.2V VOUT - protects during short-circuit or negative bias. |
Applications
| Medical Sensor Power | Portable Test Equipment |
|---|---|
|
Use Scenario: Powering low-power analog front-ends and ADC reference supplies in handheld ECG or pulse oximeter units. IC Role / Device Role / Timing Role: Adjustable LDO providing clean, stable 2.5V or 3.3V rail with minimal thermal rise and no output cap required. Use Value: Eliminates capacitor aging drift and saves PCB area in compact enclosures while maintaining ±0.5% accuracy over temperature. |
Use Scenario: Supplying precision DACs and signal chain components in battery-powered multimeters and oscilloscope probes. IC Role / Device Role / Timing Role: Low-noise, enable-controlled regulator delivering 1.8V or 2.5V to sensitive analog circuitry. Use Value: 30μVRMS noise ensures measurement integrity; shutdown current <1µA extends battery runtime between calibrations. |
| Wireless Infrastructure Bias | Smart Grid Communication Module |
|
Use Scenario: Biasing VCOs and low-noise amplifiers in small-cell base station RF modules. IC Role / Device Role / Timing Role: Ultra-low-noise LDO generating 3.3V or 5.0V from intermediate 3.8V Li-ion rail. Use Value: Direct VCO supply without LC filtering; 30μVRMS noise avoids phase jitter degradation in 5G timing paths. |
Use Scenario: Powering isolated RS-485 transceivers and microcontrollers in AMI metering endpoints. IC Role / Device Role / Timing Role: Adjustable regulator set to 3.3V, enabling flexible interface voltage matching across legacy and new designs. Use Value: Reverse current blocking prevents backfeed into primary power during brownout; 150mA headroom supports burst transmit loads. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar adjustable LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS7A2025PDBVR | Fixed 2.5V output; 300mA rating; 165mV dropout at 300mA; requires 1µF min COUT; 12µVRMS noise. | Not adjustable; higher current but fixed voltage - suitable only where 2.5V is acceptable and board space allows COUT. | Select if fixed 2.5V output suffices and higher load current is needed; avoid if adjustable voltage or capacitor-free operation is required. |
| MCP1826T-ADJE/DC | P-channel MOSFET LDO; 300mA; 250mV dropout at 300mA; 45µVRMS noise; requires 1µF COUT; no enable pin. | No EN control; higher dropout; higher noise; needs output capacitor - lacks reverse blocking and shutdown capability. | Choose only for cost-sensitive, non-portable applications where enable and ultra-low noise are not critical. |
Compared with TPS73101DBVRG4, TPS7A2025PDBVR offers higher current but sacrifices adjustability and capacitor-free operation, while MCP1826T-ADJE/DC lacks enable control, reverse blocking, and low-noise performance - making TPS73101DBVRG4 uniquely suited for compact, battery-powered, noise-sensitive adjustable-rail designs.
Availability
TPS73101DBVRG4 is available at Aetrix Electronics and suitable for medical sensor power, portable test equipment, wireless infrastructure bias, and smart grid communication modules requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.
Supply support for TPS73101DBVRG4 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 connectivity technologies, with decades of LDO design expertise and broad automotive, industrial, and personal electronics portfolio.
The TPS731 family was engineered for portable and noise-sensitive applications demanding capacitor-free stability, ultra-low dropout, and reverse current protection - targeting space-constrained, battery-powered, and RF-critical systems.
FAQ
Does TPS73101DBVRG4 require an output capacitor to remain stable?
No, TPS73101DBVRG4 is explicitly designed for capacitor-free operation due to its NMOS pass element and charge-pump architecture. Stability is maintained across all load conditions without any output capacitor - though adding a 1µF–10µF COUT improves load transient response and further reduces noise. This eliminates capacitor-related aging, size, and cost constraints in compact designs.
What is the function of the FB pin on TPS73101DBVRG4?
The FB pin on TPS73101DBVRG4 is the feedback input for the adjustable-output configuration. It connects to the junction of two external resistors (R1 and R2) between OUT and GND, setting VOUT = 1.204V × (R1 + R2)/R2. With typical IFB of 0.1–0.3µA, it enables precise 1.2V–5.5V programmability while supporting noise reduction via optional CFB from FB to GND.
How does TPS73101DBVRG4 achieve reverse current protection?
TPS73101DBVRG4 achieves reverse current protection through its NMOS pass transistor topology and controlled gate drive. When EN is driven low, the charge-pump and gate driver fully discharge the NMOS gate, turning off conduction from OUT to IN. Reverse leakage is specified at <10µA under VOUT > VIN conditions - critical for multi-supply systems and hot-swap applications.
Can TPS73101DBVRG4 operate from a 1.8V input to deliver 1.2V output?
Yes, TPS73101DBVRG4 supports this condition: its minimum input voltage is 1.7V, and its dropout voltage is only 30mV typical at 150mA. At 1.2V output and 150mA load, it requires just 1.23V input - well within the 1.8V supply margin. This enables efficient low-voltage operation in single-cell LiFePO₄ or energy-harvesting systems.
What is the maximum allowable input voltage for TPS73101DBVRG4?
The absolute maximum input voltage for TPS73101DBVRG4 is 6.0V, but the recommended operating maximum is 5.5V per datasheet specifications. Operation above 5.5V risks permanent damage or degraded reliability; transient spikes exceeding 6.0V - even briefly - must be suppressed with clamping or filtering on the IN rail.
TPS73101DBVRG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- SC-74A, SOT-753
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- Output Configuration:
- Positive
- Output Type:
- Adjustable
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 1.2V
- Voltage - Output (Max):
- 5.5V
- Voltage Dropout (Max):
- 0.1V @ 150mA
- Current - Output:
- 150mA
- Current - Quiescent (Iq):
- 550 µA
- Current - Supply (Max):
- 750 µA
- PSRR:
- 58dB ~ 37dB (100Hz ~ 10kHz)
- Control Features:
- Enable
- Protection Features:
- Over Current, Over Temperature, Short Circuit, Reverse Polarity
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-5
TPS73101DBVRG4 FAQ
1.How can I place an order for TPS73101DBVRG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS73101DBVRG4 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 TPS73101DBVRG4 reliable?
The price and inventory of TPS73101DBVRG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS73101DBVRG4 is usually 5 days.
3.What payment methods are accepted for TPS73101DBVRG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS73101DBVRG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS73101DBVRG4?
TPS73101DBVRG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS73101DBVRG4 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 TPS73101DBVRG4?
For technical support, including TPS73101DBVRG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS73101DBVRG4 requirements.
6.How does Aetrix verify that TPS73101DBVRG4 is sourced from the original manufacturer or authorized distributors?
All TPS73101DBVRG4 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 TPS73101DBVRG4 meets industry standards.
7.What is the process for return or replacement of TPS73101DBVRG4?
All TPS73101DBVRG4 units undergo pre-shipment inspection (PSI). If there is an issue with TPS73101DBVRG4, 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 TPS73101DBVRG4 part is unused and in its original packaging.
Return procedure for TPS73101DBVRG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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