My Inquiry
My Account
Texas Instruments TLV743105PDBVR
- Part No.:
- TLV743105PDBVR
- Manufacturer:
- Texas Instruments
- Package:
- SC-74A, SOT-753
- Datasheet:
-
TLV743105PDBVR.pdf
- Description:
- IC REG LIN 1.05V 300MA SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:11,807
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
TLV743105PDBVR from Texas Instruments is a 300-mA, 1.05-V fixed-output low-dropout linear regulator (LDO) in SOT-23-5 package, featuring 125 mV dropout at 300 mA (for 3.3-V variant), ±1.4% output accuracy over –40°C to +125°C, 34 µA quiescent current, and stable operation with only 1-µF ceramic output capacitor. It serves as a precision power rail for low-voltage logic cores in portable battery-powered systems.
For engineers reviewing the TLV743105PDBVR datasheet, TLV743105PDBVR pinout, TLV743105PDBVR application, or TLV743105PDBVR equivalent, key selection criteria include ultra-low IQ for standby efficiency, active output discharge for fast rail shutdown, foldback current limiting for short-circuit robustness, and compatibility with minimal 1-µF output capacitance in space-constrained PCB layouts.
Technical Context
The TLV743105PDBVR implements a PMOS pass transistor architecture with integrated undervoltage lockout (UVLO), active-high enable control, and thermal shutdown at 160°C. Its foldback current limit reduces output current as VOUT collapses - delivering ~150 mA into a short at 1.05 V - preventing destructive power dissipation during fault conditions.
It features an internal 120-Ω active pulldown circuit that discharges the output when disabled, enabling rapid rail collapse for sequencing-sensitive applications. The device operates across 1.4 V to 5.5 V input range and maintains regulation down to 1.05 V output with <25 mV load regulation error (300 mA, DBV package).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.05 V - precisely regulated rail for 1.1-V I/O or sub-1.2-V logic domains. |
| Max Output Current | 300 mA - sufficient for powering multiple low-power MCU peripherals or sensor interfaces. |
| Dropout Voltage | 125 mV at 300 mA (3.3-V variant); for 1.05 V, typical dropout is ≤270 mV - enables operation from single-cell Li-ion or 1.8-V supply rails. |
| Accuracy | ±1.4% over –40°C to +125°C - ensures reliable voltage margining for 1.05-V core supplies under thermal stress. |
| Quiescent Current | 34 µA - minimizes battery drain in always-on subsystems like RTC or wake-up controllers. |
| PSRR | 50 dB at 1 kHz - suppresses switching noise from upstream DC/DC converters feeding the LDO input. |
| Output Capacitor | Stable with ≥1 µF ceramic - eliminates need for bulky tantalum or electrolytic capacitors, reducing BOM cost and footprint. |
Pinout & Package
SOT-23-5 (DBV) package: 2.90 mm × 1.60 mm body, no thermal pad; standard leaded surface-mount footprint compatible with automated assembly.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1: IN | Input supply connection | Accepts 1.4–5.5 V; requires local 1-µF ceramic bypass capacitor to GND for stability and transient response. |
| 2: GND | Power ground reference | Primary return path for load current and internal bias; must connect to low-impedance system ground plane. |
| 3: EN | Active-high enable control | Drive >0.9 V to enable; <0.35 V to disable; no internal pull-down - external logic or resistor required for default state. |
| 4: NC | No internal connection | Unbonded pin; must remain unconnected - floating or tied to GND/IN violates layout guidelines. |
| 5: OUT | Regulated output | Delivers 1.05 V ±1.4%; connects to 1-µF ceramic capacitor to GND; supports active pulldown via 120-Ω internal resistor when disabled. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low quiescent current | 34 µA enables >1-year battery life in coin-cell–powered IoT sensors with periodic wake-up. |
| Active output discharge | 120-Ω internal pulldown ensures VOUT falls to GND within microseconds after EN deassertion - critical for safe power sequencing. |
| Foldback current limiting | Reduces short-circuit current to ~150 mA at 1.05 V, limiting power dissipation and avoiding thermal runaway during faults. |
| UVLO protection | Enables only when VIN > 1.4 V (rising threshold), preventing erratic startup from brownout or weak batteries. |
| Thermal shutdown | Auto-shutdown at 160°C junction temperature with hysteresis (140°C reset) - protects against sustained overload or poor heatsinking. |
Applications
| Wearable Health Sensors | Bluetooth LE Peripheral Modules |
|---|---|
|
Use Scenario: Continuous ECG/PPG signal acquisition powered by CR2032 coin cell with 10-year shelf life requirement. IC Role / Device Role / Timing Role: Primary 1.05-V supply for ultra-low-power analog front-end and SAR ADC. Use Value: 34 µA IQ extends battery runtime; 1-µF capacitor support minimizes PCB area in compact wristband form factor. |
Use Scenario: BLE beacon transmitting periodic advertisements while maintaining deep-sleep current <1 µA. IC Role / Device Role / Timing Role: Clean 1.05-V rail for RF transceiver and 32-bit ARM Cortex-M0+ core. Use Value: 50 dB PSRR at 1 kHz rejects noise from switching regulators; active discharge prevents back-powering during sleep transitions. |
| Industrial Edge Node Controllers | Smart Home Motion Detectors |
|
Use Scenario: Battery-backed programmable logic controller operating in –40°C to +85°C ambient with 10-year field life. IC Role / Device Role / Timing Role: Stable 1.05-V supply for FPGA configuration memory and real-time clock. Use Value: ±1.4% accuracy over full temperature range guarantees timing margin compliance; thermal shutdown prevents failure in sealed enclosures. |
Use Scenario: PIR-based occupancy sensor using AAA batteries with 5-year replacement interval. IC Role / Device Role / Timing Role: Low-noise 1.05-V source for op-amp signal conditioning and microcontroller I/O. Use Value: Foldback current limit survives accidental solder bridge on output; SOT-23-5 footprint allows 0.5-mm pitch routing in dense 2-layer PCB. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLS850F0TESA1 | 500-mA output, 45 µA IQ, 1.0-V fixed output, TO-252-3 package | Higher current capability but larger footprint and higher minimum input voltage (2.7 V) | Select when >300 mA load or automotive AEC-Q100 qualification is required; not suitable for 1.4–1.8 V input rails. |
| AP7361D-1050G-7 | 300-mA output, 60 µA IQ, 1.05-V fixed output, SOT-23-5 package, no active discharge | Lacks active output pulldown and foldback current limiting; lower PSRR (40 dB @ 1 kHz) | Choose for cost-sensitive consumer designs where fast rail collapse and short-circuit robustness are non-critical. |
Compared with TLS850F0TESA1 and AP7361D-1050G-7, the TLV743105PDBVR uniquely combines ultra-low IQ (34 µA), active discharge, foldback protection, and 1.4-V minimum input in the same SOT-23-5 footprint - making it optimal for space- and energy-constrained portable electronics requiring high reliability.
Availability
TLV743105PDBVR is available at Aetrix Electronics and suitable for wearable health sensors, Bluetooth LE peripheral modules, industrial edge node controllers, and smart home motion detectors requiring stable component supply across long production lifecycles.
Supply support for TLV743105PDBVR 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 headquartered in Dallas, Texas, specializing in analog and embedded processing technologies with broad industrial, automotive, and consumer design expertise.
The TLV743P family was designed specifically for ultra-low-power, space-constrained portable electronics - emphasizing minimal external components, low IQ, and robust fault handling without sacrificing regulation accuracy or transient performance.
FAQ
What is the output voltage tolerance of the TLV743105PDBVR over temperature and load?
The TLV743105PDBVR maintains ±1.4% output voltage accuracy across –40°C to +125°C junction temperature and 0–300 mA load current. At 25°C and 1 mA load, typical accuracy is ±1%. This tight tolerance ensures reliable operation of 1.05-V logic domains without requiring external trimming or margining circuits.
Does the TLV743105PDBVR require an external pull-up or pull-down resistor on the EN pin?
No - the TLV743105PDBVR has no internal pull-up or pull-down on the EN pin. If default-enable behavior is needed, connect EN directly to IN. For controlled shutdown, drive EN with an open-drain or push-pull GPIO; a 100-kΩ pull-down may be added externally if system-level default-off is required.
Can the TLV743105PDBVR operate from a 1.5-V input supply?
Yes - the TLV743105PDBVR supports input voltages from 1.4 V to 5.5 V. With a 1.5-V input and 1.05-V output, dropout is 450 mV at 300 mA (per datasheet Figure D024), well within operational limits. UVLO ensures stable startup only when VIN exceeds 1.4 V.
What is the purpose of the NC pin (Pin 4) on the TLV743105PDBVR SOT-23-5 package?
Pin 4 is a no-connect (NC) terminal with no internal bond wire or silicon connection. It must remain unconnected - neither grounded nor tied to IN/OUT - to avoid violating TI's layout recommendations and risking instability or ESD susceptibility in the DBV package.
How does the active output discharge function work in the TLV743105PDBVR?
When EN is driven low (<0.35 V), the TLV743105PDBVR activates an internal 120-Ω pulldown resistor between OUT and GND. Discharge time depends on COUT and parallel load resistance; for example, with 1 µF COUT and no load, VOUT falls from 1.05 V to 100 mV in ~1.2 ms - enabling precise power sequencing in multi-rail systems.
TLV743105PDBVR 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):
- 1.05V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- -
- Current - Output:
- 300mA
- Current - Quiescent (Iq):
- 60 µA
- Current - Supply (Max):
- -
- PSRR:
- -
- Control Features:
- Enable
- Protection Features:
- Current Limit, Thermal Shutdown, UVLO
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-5
TLV743105PDBVR FAQ
1.How can I place an order for TLV743105PDBVR through Aetrix?
Please submit a Request for Quotation (RFQ) for TLV743105PDBVR 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 TLV743105PDBVR reliable?
The price and inventory of TLV743105PDBVR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLV743105PDBVR is usually 5 days.
3.What payment methods are accepted for TLV743105PDBVR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TLV743105PDBVR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TLV743105PDBVR?
TLV743105PDBVR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TLV743105PDBVR 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 TLV743105PDBVR?
For technical support, including TLV743105PDBVR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLV743105PDBVR requirements.
6.How does Aetrix verify that TLV743105PDBVR is sourced from the original manufacturer or authorized distributors?
All TLV743105PDBVR 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 TLV743105PDBVR meets industry standards.
7.What is the process for return or replacement of TLV743105PDBVR?
All TLV743105PDBVR units undergo pre-shipment inspection (PSI). If there is an issue with TLV743105PDBVR, 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 TLV743105PDBVR part is unused and in its original packaging.
Return procedure for TLV743105PDBVR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TLV743105PDBVR Tags
-
MIC5504-1.8YM5-TR
Microchip Technology
-
MIC5504-3.3YM5-TR
Microchip Technology
-
MIC5365-3.0YC5-TR
Microchip Technology
-
MIC5365-1.8YC5-TR
Microchip Technology
-
MIC5365-2.5YC5-TR
Microchip Technology
-
MIC5365-3.3YC5-TR
Microchip Technology
-
MIC5365-3.3YD5-TR
Microchip Technology
-
MIC5317-3.3YM5-TR
Microchip Technology
-
TLV1117LV33DCYR
Texas Instruments
-
MIC5317-3.3YMT-TZ
Microchip Technology
-
MIC5528-3.3YMT-TR
Microchip Technology
-
TLV75801PDRVR
Texas Instruments
Tech Hub
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
LDO regulator guide covering low dropout voltage, power dissipation, thermal design, PSRR, output noise, capacitor stability, adjustable LDO circuits, LDO vs buck converter and datasheet selection chec…
Conditional Access Module guide covering CAM meaning, CI/CI+ interface, smart card authorization, DVB security workflow, TV and set-top box compatibility, internal electronics, ESD protection, connecto…
Guide to electronic component obsolescence covering EOL risk, PCN/PDN notices, last-time buy planning, replacement options, form-fit-function validation, counterfeit risk and BOM lifecycle management.
18650 battery guide covering lithium-ion cell basics, 3.6V/3.7V voltage, 4.2V charging, mAh and Wh capacity, protected cells, chargers, BMS, series-parallel packs, holders, welding and sourcing checks.…
