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Texas Instruments TLV77328PDBVR
- Part No.:
- TLV77328PDBVR
- Manufacturer:
- Texas Instruments
- Package:
- SC-74A, SOT-753
- Datasheet:
-
TLV77328PDBVR.pdf
- Description:
- 300-MA HIGH-PSRR LOW-IQ LOW-DROP
- Quantity:
- Payment:
- Shipping:
Inventory:2,935
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Product details
Overview
TLV77328PDBVR from Texas Instruments is a 300mA, fixed 2.8V output low-dropout (LDO) linear regulator in SOT-23-5 package, featuring 80dB PSRR at 217Hz, 180mV dropout at 300mA, ±2% output voltage accuracy, and active output pulldown for fast discharge-designed for power management in space-constrained portable electronics.
For engineers reviewing the TLV77328PDBVR datasheet, TLV77328PDBVR pinout, TLV77328PDBVR application, or TLV77328PDBVR equivalent, key selection criteria include dropout performance under 300mA load, PSRR across audio and RF bands, thermal behavior in compact PCB layouts, and enable-controlled sequencing in multi-rail systems.
Technical Context
The TLV77328PDBVR implements a CMOS pass transistor architecture with internal soft-start and foldback current limiting. Its high PSRR stems from a precision bandgap reference and error amplifier with optimized loop compensation, enabling stable regulation even with 1µF ceramic input/output capacitors.
It operates across −40°C to +125°C junction temperature, supports enable-controlled shutdown with <2µA shutdown current, and integrates thermal shutdown (160°C trip, 140°C reset) and active pulldown (135Ω) to ensure predictable power-down behavior in battery-powered systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 2.8V ±2% - ensures precise biasing for 2.8V I/O domains and analog subsystems without external feedback. |
| Max Output Current | 300mA - sufficient to power multiple low-power cores, sensors, or RF front-end stages in portable devices. |
| Dropout Voltage | 180mV at 300mA - enables operation from 3.0V input while maintaining regulation, critical for single-cell Li-ion or Li-poly systems. |
| PSRR | 80dB at 217Hz, 72dB at 1kHz - suppresses switching noise from DC/DC converters feeding the LDO input, preserving signal integrity in ADCs and audio codecs. |
| Quiescent Current | 120µA typical - minimizes standby power loss in always-on subsystems like real-time clocks or sensor hubs. |
| Enable Threshold | VEN(HI) = 0.9V, VEN(LOW) = 0.3V - compatible with 1.8V and 3.3V GPIO logic levels for flexible system-level control. |
| Thermal Shutdown | 160°C trip / 140°C hysteresis - protects against sustained overload or poor heatsinking in sealed enclosures. |
Pinout & Package
SOT-23-5 (DBV) package: 2.9mm × 2.8mm footprint with exposed pad option; suitable for automated assembly and moderate power dissipation in dense layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1: IN | Input supply connection | Accepts 1.4V–5.5V input; requires ≥1µF ceramic capacitor to ground for transient suppression and PSRR optimization. |
| 2: GND | Power ground reference | Common return path for input, output, and enable; must be connected to low-impedance ground plane for stability and thermal performance. |
| 3: EN | Logic-enable input | Active-high control: >0.9V enables regulation; <0.3V disables output and activates internal 135Ω pulldown to discharge VOUT. |
| 4: N/C | No internal connection | Electrically isolated pin; connect to GND for improved thermal conduction and mechanical anchoring during reflow. |
| 5: OUT | Regulated output | Delivers 2.8V ±2% at up to 300mA; requires 0.47–40µF ceramic capacitor with ≤100mΩ ESR for guaranteed stability. |
Key Features
| Feature | Design Value |
|---|---|
| High PSRR architecture | 80dB at 217Hz enables clean power delivery to noise-sensitive analog circuits without bulky LC filtering. |
| Active output pulldown | 135Ω internal resistor discharges VOUT within microseconds upon disable, preventing floating states in sequenced power domains. |
| Foldback current limit | Hybrid brick-wall/foldback protection limits fault current to 350–720mA during overloads and reduces short-circuit current to 65mA, minimizing thermal stress. |
| Soft-start circuit | Internal ramp limits inrush current during startup, avoiding input rail collapse when powering large output capacitance. |
| Stable with 1µF ceramics | Eliminates need for tantalum or aluminum electrolytic capacitors, reducing BOM cost, board area, and aging-related failure modes. |
Applications
| Smartphone Baseband Power | Gaming Console Audio Codec Supply |
|---|---|
Use Scenario: Powers baseband processor I/O banks requiring tightly regulated 2.8V from a shared 3.3V or 4.2V system rail. IC Role / Device Role / Timing Role: Primary LDO delivering clean, low-noise 2.8V with fast load transient response to maintain digital interface timing margins. Use Value: 72dB PSRR at 1kHz rejects noise from adjacent switching regulators, preventing bit errors in high-speed serial interfaces. | Use Scenario: Supplies analog front-end of stereo audio codec in handheld gaming device, where EMI immunity and low output noise are critical. IC Role / Device Role / Timing Role: Low-noise voltage source (75×VOUT µVRMS) with active discharge to prevent pop/click during mute/unmute transitions. Use Value: 135Ω pulldown ensures VOUT decays below 0.3V within 100µs, eliminating audible artifacts during rapid power cycling. |
| Tablet Camera Module Bias | Streaming Media Player Wi-Fi SoC Core |
Use Scenario: Provides 2.8V bias to image sensor analog circuitry and autofocus motor driver in ultra-thin tablet designs. IC Role / Device Role / Timing Role: Compact-area LDO with 1.4V minimum input enabling direct use of partially discharged Li-ion cells (≥3.0V). Use Value: 180mV dropout at 300mA allows uninterrupted operation down to 2.98V input, extending usable battery runtime by ~8%. | Use Scenario: Supplies 2.8V core voltage to Wi-Fi/BT combo chip in streaming stick, where thermal headroom is constrained by plastic enclosure. IC Role / Device Role / Timing Role: Thermally robust LDO with 125°C max operating junction temperature and RθJA = 242.5°C/W in SOT-23. Use Value: Use Value: Foldback current limit prevents thermal runaway during antenna detuning events that cause sudden current spikes. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLS850F28T | Automotive-grade AEC-Q100 qualified; higher quiescent current (250µA); no active pulldown | Designed for automotive infotainment power rails; lacks fast discharge for consumer sequencing requirements | Select only if AEC-Q100 qualification and extended temperature range (−40°C to +150°C) are mandatory. |
| TPS7A2028PDQNR | Lower quiescent current (6.5µA); same 2.8V output; 0.5mm × 0.5mm X2SON package; no foldback current limit | Optimized for ultra-low-power always-on sensors; smaller footprint but lower current capability (300mA vs 500mA) | Prefer for battery life-critical wearables; avoid where short-circuit robustness or thermal margin under sustained load is required. |
Compared with TLS850F28T and TPS7A2028PDQNR, the TLV77328PDBVR uniquely balances high PSRR, active pulldown, foldback protection, and industrial temperature range in a standard SOT-23 package-making it optimal for cost-sensitive, thermally constrained portable electronics where fast enable/disable control and noise rejection are essential.
Availability
TLV77328PDBVR is available at Aetrix Electronics and suitable for smartphone baseband power, tablet camera module bias, gaming console audio codec supply, streaming media player Wi-Fi SoC core, and set-top box HDMI transmitter regulation requiring stable component supply across production volumes.
Supply support for TLV77328PDBVR 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, signal chain components, and microcontrollers.
The TLV773 product line delivers small-footprint, high-PSRR LDOs optimized for portable electronics requiring low quiescent current, fast transient response, and reliable operation across industrial temperature ranges.
FAQ
What is the maximum input voltage rating for TLV77328PDBVR?
The absolute maximum input voltage for TLV77328PDBVR is 6.5V, but the recommended operating range is 1.4V to 5.5V. Exceeding 5.5V may trigger internal protection or degrade long-term reliability. Operation above 6.5V risks permanent damage per the Absolute Maximum Ratings table in the official datasheet.
Does TLV77328PDBVR require an input capacitor for stability?
No, TLV77328PDBVR does not require an input capacitor for stability, but a 1µF ceramic capacitor is strongly recommended to suppress input ripple, improve PSRR, and mitigate effects of source impedance and inductance-especially during load transients. The device remains stable without it, but dynamic performance degrades significantly without this capacitor.
What is the purpose of the N/C pin on TLV77328PDBVR?
The N/C (no-connect) pin on TLV77328PDBVR has no internal electrical connection. It is provided for mechanical reinforcement and thermal enhancement. TI recommends connecting the N/C pin to ground to improve thermal conduction from the die to the PCB ground plane, thereby lowering junction temperature under load.
How does the active pulldown feature function in TLV77328PDBVR?
The active pulldown in TLV77328PDBVR engages automatically when the EN pin falls below 0.3V, connecting a 135Ω internal resistor between OUT and GND. This discharges the output capacitor rapidly-typically within tens of microseconds-ensuring a known low-voltage state during shutdown and preventing unintended wake-up or latch-up in downstream circuitry.
Can TLV77328PDBVR operate with a 1.8V input supply?
No, TLV77328PDBVR cannot regulate 2.8V output from a 1.8V input. Its minimum input voltage is 1.4V, but the required headroom is determined by dropout voltage: at 300mA, dropout is 180mV, so minimum functional input is 2.98V. With 1.8V input, the device enters dropout mode and outputs ≈1.8V minus losses-far below the nominal 2.8V regulation target.
TLV77328PDBVR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- SC-74A, SOT-753
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Output Configuration:
- Positive
- Output Type:
- Fixed
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 2.8V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.23V @ 300mA
- Current - Output:
- 300mA
- Current - Quiescent (Iq):
- 120 µA
- Current - Supply (Max):
- -
- PSRR:
- 56dB ~ 55dB (100kHz ~ 1MHz)
- Control Features:
- Current Limit, Enable, Soft Start
- Protection Features:
- Over Current, Over Temperature, Under Voltage Lockout (UVLO)
- Operating Temperature:
- -40°C ~ 85°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-5
TLV77328PDBVR FAQ
1.How can I place an order for TLV77328PDBVR through Aetrix?
Please submit a Request for Quotation (RFQ) for TLV77328PDBVR 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 TLV77328PDBVR reliable?
The price and inventory of TLV77328PDBVR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLV77328PDBVR is usually 5 days.
3.What payment methods are accepted for TLV77328PDBVR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TLV77328PDBVR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TLV77328PDBVR?
TLV77328PDBVR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TLV77328PDBVR 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 TLV77328PDBVR?
For technical support, including TLV77328PDBVR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLV77328PDBVR requirements.
6.How does Aetrix verify that TLV77328PDBVR is sourced from the original manufacturer or authorized distributors?
All TLV77328PDBVR 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 TLV77328PDBVR meets industry standards.
7.What is the process for return or replacement of TLV77328PDBVR?
All TLV77328PDBVR units undergo pre-shipment inspection (PSI). If there is an issue with TLV77328PDBVR, 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 TLV77328PDBVR part is unused and in its original packaging.
Return procedure for TLV77328PDBVR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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