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Texas Instruments TLV75728PDYDR
- Part No.:
- TLV75728PDYDR
- Manufacturer:
- Texas Instruments
- Package:
- SC-74A, SOT-753
- Datasheet:
-
TLV75728PDYDR.pdf
- Description:
- 1-A, LOW-IQ HIGH-ACCURACY LOW-DR
- Quantity:
- Payment:
- Shipping:
Inventory:2,796
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Product details
Overview
TLV75728PDYDR from Texas Instruments is a 1A, low-quiescent-current (25μA typical), fixed 2.8V output LDO regulator in thermally enhanced SOT-23-5 (DYD) package. It operates from 1.45V to 5.5V input, delivers ±1% output accuracy, supports 1μF ceramic output capacitance, and features active output discharge and built-in soft-start - ideal for powering MCU core rails in portable battery-powered systems.
For engineers reviewing the TLV75728PDYDR datasheet, TLV75728PDYDR pinout, TLV75728PDYDR application, or TLV75728PDYDR equivalent, key selection criteria include dropout voltage at 1A (max 450mV @ 2.8VOUT), thermal resistance (60.3°C/W RθJA), enable threshold (VHI = 1V), foldback current limit behavior, and stability with minimal 1μF COUT.
Technical Context
The TLV75728PDYDR implements a PMOS pass transistor architecture with precision band-gap reference and error amplifier, enabling tight 1% output regulation across –40°C to +125°C. Its internal soft-start controls inrush current during power-up, while active output discharge pulls VOUT to GND within microseconds upon shutdown.
It integrates undervoltage lockout (UVLO rising threshold 1.21–1.44V), thermal shutdown (165°C trip, 155°C reset), and foldback current limiting - reducing power dissipation during short-circuit events by scaling output current as VOUT collapses below 0.4×VOUT(NOM).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 2.8V ±1% (max) over –40°C to +125°C - ensures stable core supply for low-voltage MCUs and SoCs. |
| Max Output Current | 1A continuous - sufficient for modern microcontroller cores, FPGA I/O banks, and sensor signal chains. |
| Dropout Voltage | 450mV max at 1A, 2.8VOUT, TJ ≤ +125°C - enables operation from 3.25V input, critical for single-cell Li-ion or boosted battery rails. |
| Quiescent Current | 25μA typical at no load - minimizes standby power in always-on subsystems like RTC or wake-on-event circuits. |
| PSRR | 46dB at 100kHz - suppresses high-frequency switching noise from DC/DC converters feeding the LDO input. |
| Stability | Guaranteed with ≥1μF ceramic COUT - eliminates need for large, costly tantalum or electrolytic capacitors. |
| Enable Threshold | VHI = 1V (min), VLO = 0.3V (max) - compatible with 1.8V and 3.3V GPIO logic without level-shifting. |
Pinout & Package
SOT-23-5 package with exposed thermal pad (DYD); 2.9mm × 1.6mm footprint; thermal pad internally connected to GND and must be soldered to PCB ground plane for optimal thermal performance (RθJA = 60.3°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - IN | Input supply connection | Accepts 1.45V–5.5V; requires ≥1μF ceramic capacitor to GND for stability and transient response. |
| 2 - GND | Power ground reference | Common return path for IN, OUT, and EN; thermal pad is electrically tied to this pin. |
| 3 - EN | Active-high enable control | Drives >1V to enable regulator; <0.3V disables it and activates internal 120Ω pulldown on OUT. |
| 4 - NC | No internal connection | Unbonded die pad; must remain unconnected - no routing or copper fill allowed. |
| 5 - OUT | Regulated output | Delivers 2.8V ±1%; requires ≥1μF ceramic capacitor to GND; actively discharged when EN = low. |
Key Features
| Feature | Design Value |
|---|---|
| Built-in soft-start | Monotonic VOUT rise with controlled slew rate - prevents input rail collapse and avoids false resets in downstream logic. |
| Active output discharge | Internal 120Ω switch connects OUT to GND during shutdown - ensures known low-impedance state for safe sequencing and fast wake-up. |
| Foldback current limit | Reduces output current as VOUT drops below 1.12V (0.4×2.8V) - limits power dissipation and junction temperature during shorts. |
| High PSRR at 100kHz | 46dB rejection of switching noise - enables clean LDO output even when powered from noisy buck converter outputs. |
| Thermally enhanced DYD package | 60.3°C/W RθJA (EVM) - 39% lower thermal resistance than standard DBV SOT-23-5, supporting higher sustained loads in compact layouts. |
Applications
| Portable MCU Power Rail | Always-On Sensor Subsystem |
|---|---|
Use Scenario: Powers ARM Cortex-M4/M7 core in handheld medical device operating from single-cell Li-ion (3.0–4.2V). IC Role / Device Role / Timing Role: Primary 2.8V core LDO delivering regulated supply with fast load transient response and ultra-low IQ. Use Value: Enables >100-hour battery life in sleep mode via 25μA quiescent current and supports full-speed operation at 1A peak. |
Use Scenario: Supplies 2.8V to MEMS accelerometer, temperature sensor, and BLE radio in industrial wireless node. IC Role / Device Role / Timing Role: Always-on bias rail with active discharge for safe wake-from-sleep sequencing and ESD-robust EN interface. Use Value: Eliminates external pull-down resistor and reduces BOM count while ensuring deterministic power-down state. |
| Set-Top Box SoC I/O Bank | White Goods Control Panel |
Use Scenario: Provides 2.8V to HDMI PHY and DDR I/O buffers in consumer STB powered from 5V DC/DC rail. IC Role / Device Role / Timing Role: Low-noise post-regulator decoupling LDO with 46dB PSRR at 100kHz to suppress SMPS ripple. Use Value: Prevents bit errors and video artifacts by maintaining clean 2.8V under dynamic I/O switching loads up to 1A. |
Use Scenario: Regulates 2.8V for touch controller, display driver, and UI microcontroller in refrigerator control board. IC Role / Device Role / Timing Role: Robust front-end LDO with UVLO (1.21–1.44V) and thermal shutdown (165°C) for wide ambient range (–25°C to +70°C). Use Value: Guarantees reliable startup after cold condensation and prevents latch-up during compressor-induced line dips. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLS850F0TESK | 500mA max output, integrated watchdog timer, AEC-Q100 qualified | Automotive body electronics only; requires external capacitor for watchdog timeout | Choose for automotive-grade reliability where 1A output is not required and system-level fault monitoring is needed. |
| TPS7A2028PDQNR | 250mA max output, 6.5μA IQ, WSON-6 package (2mm × 2mm), no active discharge | Ultra-low-power wearables; lacks pulldown switch and foldback current limit | Choose for sub-100μA standby systems where size is critical and 1A capability is unnecessary. |
Compared with TLS850F0TESK and TPS7A2028PDQNR, TLV75728PDYDR uniquely balances 1A delivery, 25μA IQ, active discharge, and thermally optimized DYD packaging - making it the only option among the three suitable for space-constrained, battery-powered applications demanding both high current and low standby power.
Availability
TLV75728PDYDR is available at Aetrix Electronics and suitable for portable medical devices, industrial wireless sensors, consumer set-top boxes, and white goods control panels requiring stable component supply with consistent parametric performance and long-term manufacturability.
Supply support for TLV75728PDYDR 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 LDO design expertise and broad automotive, industrial, and consumer qualification coverage.
The TLV757P family was engineered for ultra-small, high-efficiency power delivery in battery-constrained and thermally dense applications - targeting next-generation portable electronics, IoT edge nodes, and energy-conscious industrial controls.
FAQ
What is the maximum dropout voltage specification for TLV75728PDYDR at 1A output current?
The maximum dropout voltage for TLV75728PDYDR is 450mV at 1A output current, measured at VOUT = 2.8V and junction temperature ≤ +125°C. This value reflects worst-case conditions including process variation and temperature extremes - enabling reliable operation from as low as 3.25V input while maintaining regulation.
Does TLV75728PDYDR require an external pull-down resistor on the EN pin?
No, TLV75728PDYDR does not require an external pull-down resistor on the EN pin. It features an internal 120Ω pulldown to GND when disabled, ensuring predictable startup behavior. External pull-down is unnecessary unless specific timing or noise immunity requirements mandate stronger default-low assertion.
Can TLV75728PDYDR operate stably with less than 1μF output capacitance?
No - TLV75728PDYDR is specified and characterized for stability with ≥1μF ceramic output capacitance. Using smaller values risks oscillation or degraded transient response. The datasheet explicitly states minimum nominal COUT = 1μF (derated to ≥0.47μF effective at operating bias), and TI does not guarantee stability below this threshold.
What is the purpose of the NC pin (Pin 4) on TLV75728PDYDR?
Pin 4 on TLV75728PDYDR is a no-connect (NC) terminal with no internal bond wire or circuit connection. It must remain unconnected - no trace routing, copper pour, or solder mask opening should contact this pad. Leaving it floating avoids parasitic coupling and ensures validated thermal and electrical performance per the DYD package specification.
How does the foldback current limit function in TLV75728PDYDR during a short-circuit event?
In TLV75728PDYDR, foldback current limiting reduces output current as VOUT falls below 1.12V (0.4×2.8V). At full short (VOUT ≈ 0V), it delivers ~755mA typical - significantly lower than the 1.55A nominal current limit - minimizing power dissipation [(VIN – 0V) × 755mA] and delaying thermal shutdown activation during sustained faults.
TLV75728PDYDR 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):
- 0.675V @ 1A
- Current - Output:
- 1A
- Current - Quiescent (Iq):
- 40 µA
- Current - Supply (Max):
- -
- PSRR:
- 46dB (100kHz), 52dB (1kHz ~ 1MHz)
- Control Features:
- Current Limit, Enable
- Protection Features:
- Over Current, Over Temperature, Under Voltage Lockout (UVLO)
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-5
TLV75728PDYDR FAQ
1.How can I place an order for TLV75728PDYDR through Aetrix?
Please submit a Request for Quotation (RFQ) for TLV75728PDYDR 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 TLV75728PDYDR reliable?
The price and inventory of TLV75728PDYDR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLV75728PDYDR is usually 5 days.
3.What payment methods are accepted for TLV75728PDYDR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TLV75728PDYDR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TLV75728PDYDR?
TLV75728PDYDR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TLV75728PDYDR 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 TLV75728PDYDR?
For technical support, including TLV75728PDYDR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLV75728PDYDR requirements.
6.How does Aetrix verify that TLV75728PDYDR is sourced from the original manufacturer or authorized distributors?
All TLV75728PDYDR 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 TLV75728PDYDR meets industry standards.
7.What is the process for return or replacement of TLV75728PDYDR?
All TLV75728PDYDR units undergo pre-shipment inspection (PSI). If there is an issue with TLV75728PDYDR, 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 TLV75728PDYDR part is unused and in its original packaging.
Return procedure for TLV75728PDYDR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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