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Texas Instruments TLV77312PDBVR
- Part No.:
- TLV77312PDBVR
- Manufacturer:
- Texas Instruments
- Package:
- SC-74A, SOT-753
- Datasheet:
-
TLV77312PDBVR.pdf
- Description:
- 300-MA HIGH-PSRR LOW-IQ LOW-DROP
- Quantity:
- Payment:
- Shipping:
Inventory:2,919
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Product details
Overview
TLV77312PDBVR from Texas Instruments is a 300mA, fixed 1.2V output low-dropout linear regulator in SOT-23-5 package, featuring 80dB PSRR at 217Hz, 180mV dropout at 300mA (1.2V output), and ±2% output voltage accuracy over –40°C to +125°C. It delivers stable power to noise-sensitive analog circuitry in space-constrained portable electronics.
For engineers reviewing the TLV77312PDBVR datasheet, TLV77312PDBVR pinout, TLV77312PDBVR application, or TLV77312PDBVR equivalent, key selection criteria include its 1.4V–5.5V input range, active output pulldown, foldback current limit, and compatibility with 1µF ceramic input/output capacitors - critical for compact, high-PSRR power rail design.
Technical Context
The TLV77312PDBVR employs a CMOS pass transistor with RDS(ON) optimized for low dropout (180mV @ 300mA, 1.2VOUT) and high PSRR (72dB @ 1kHz). Its internal soft-start prevents inrush current, while the enable-controlled active pulldown resistor (135Ω typical) ensures rapid, predictable output discharge during shutdown.
It operates across –40°C to +125°C junction temperature with thermal shutdown (160°C trip, 140°C reset) and foldback current limiting (ICL = 350–720mA, ISC = 65mA). The device is stable with 0.47–40µF ceramic output capacitors and requires no external compensation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output voltage | Fixed 1.2V ±2% (ensures precise biasing for 1.2V-core logic and analog subsystems) |
| Max output current | 300mA continuous (supports moderate-power peripherals without external boost) |
| Dropout voltage | 180mV at 300mA (enables regulation down to VIN = 1.38V, critical for single-cell Li-ion or coin-cell operation) |
| PSRR | 80dB @ 217Hz, 72dB @ 1kHz (rejects switching noise from adjacent DC/DC converters) |
| Quiescent current | 80–120µA (minimizes standby power in always-on sensor nodes) |
| Enable threshold | VEN(HI) = 0.9V, VEN(LOW) = 0.3V (compatible with 1.2V/1.8V GPIO logic levels) |
| Operating temp | –40°C to +125°C (supports automotive cabin and industrial edge applications) |
Pinout & Package
TLV77312PDBVR uses the 5-pin SOT-23 (DBV) package (2.9mm × 2.8mm), with exposed pad not present. Pin 4 is N/C (no internal connection); connecting it to GND improves thermal performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (IN) | Input voltage supply | Accepts 1.4V–5.5V; requires ≥1µF ceramic capacitor to ground for transient immunity and PSRR optimization |
| 2 (GND) | Ground reference | Common return path for input, output, and enable; must be low-impedance for stability and noise rejection |
| 3 (EN) | Enable control input | Logic-level interface: >0.9V enables regulator; <0.3V disables output and activates internal 135Ω pulldown |
| 4 (N/C) | No internal connection | Electrically isolated; recommended to tie to GND for improved thermal conduction and EMI reduction |
| 5 (OUT) | Regulated output | Delivers 1.2V ±2%; requires 0.47–40µF ceramic capacitor to ground for stability and load transient response |
Key Features
| Feature | Design Value |
|---|---|
| High PSRR architecture | 80dB at 217Hz enables clean power delivery in mixed-signal SoC systems sharing noisy DC/DC supplies |
| Active output pulldown | 135Ω internal MOSFET discharges output rapidly on disable, preventing floating states in sequenced power domains |
| Foldback current limit | Transitions from brick-wall (720mA max) to foldback (65mA short-circuit) to limit power dissipation during faults |
| Thermal shutdown with hysteresis | 160°C trip / 140°C reset prevents latch-up and enables self-recovery after overload or poor heatsinking |
| Ultra-small footprint | SOT-23-5 package (2.9mm × 2.8mm) supports high-density PCB layouts in smartphones and wearables |
Applications
| Smartphone Power Rail | Camera Module Bias |
|---|---|
|
Use Scenario: Supplies 1.2V core voltage to application processor I/O banks and memory interfaces. IC Role / Device Role / Timing Role: Low-noise LDO providing regulated bias under fast load transients from burst-mode CPU activity. Use Value: 72dB PSRR at 1kHz suppresses ripple from PMIC switching frequencies, preserving signal integrity in high-speed data paths. |
Use Scenario: Powers image sensor analog front-end and ISP core logic in mobile camera modules. IC Role / Device Role / Timing Role: Stable 1.2V source enabling low-noise pixel readout and clock domain isolation. Use Value: ±2% output accuracy and 180mV dropout ensure consistent sensor gain calibration across battery voltage sag. |
| Gaming Console Audio Codec | IoT Sensor Node MCU Core |
|
Use Scenario: Delivers clean 1.2V supply to audio DAC/ADC and headphone amplifier stages. IC Role / Device Role / Timing Role: High-PSRR LDO decoupling sensitive analog audio circuits from digital supply noise. Use Value: 80dB PSRR at 217Hz eliminates audible switching artifacts from nearby buck converters. |
Use Scenario: Powers ARM Cortex-M0+ core and RF transceiver in battery-operated environmental sensors. IC Role / Device Role / Timing Role: Ultra-low quiescent current LDO enabling multi-year battery life in sleep mode. Use Value: 80–120µA IQ and active pulldown reduce system leakage, extending shelf life and operational runtime. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPL7407LPGQ | 7-channel 200mA sink driver with integrated LDO; no enable pin; fixed 3.3V output only | Designed for LED/relay driving, not precision single-rail regulation | Select only when driving discrete loads is primary function, not clean 1.2V bias |
| TPS7A0512PDBVR | 200mA, 1.2V fixed, 170mV dropout, 50dB PSRR @ 1MHz; no active pulldown | Lacks output discharge - unsuitable for power sequencing with strict ramp-down requirements | Choose when lower cost and smaller IQ (25µA) outweigh need for active discharge and higher PSRR |
Compared with TLV77312PDBVR, TPS7A0512PDBVR offers lower quiescent current but sacrifices PSRR (50dB vs 72dB @ 1kHz) and lacks active pulldown; TPL7407LPGQ integrates switching functionality but cannot replace a dedicated 1.2V LDO in precision analog or core logic rails.
Availability
TLV77312PDBVR is available at Aetrix Electronics and suitable for smartphone power management, camera module biasing, and IoT sensor node core regulation requiring stable component supply, full traceability, and long-term lifecycle support.
Supply support for TLV77312PDBVR 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 ICs, with decades of LDO design expertise and broad automotive/industrial qualification.
The TLV773 family targets portable and space-constrained applications needing high-PSRR, low-dropout regulation with minimal external components - optimized for smartphones, tablets, and camera modules.
FAQ
What is the maximum input voltage rating for TLV77312PDBVR?
The absolute maximum input voltage for TLV77312PDBVR is 6.5V, but the recommended operating range is 1.4V to 5.5V. Exceeding 5.5V risks permanent damage even if within absolute maximum ratings, and operation above this range voids functional guarantees per TI's datasheet specifications.
Does TLV77312PDBVR require an external output capacitor for stability?
Yes, TLV77312PDBVR requires a ceramic output capacitor between 0.47µF and 40µF for guaranteed stability. The device is designed for low-ESR ceramics (X7R/X5R/C0G), and using Y5V types or values outside this range may cause oscillation or degraded transient response.
How does the active pulldown feature work in TLV77312PDBVR?
When the EN pin falls below 0.3V, TLV77312PDBVR activates an internal 135Ω MOSFET between OUT and GND, actively discharging the output capacitance. This ensures a known low-voltage state during power-down, preventing unintended wake-up or latch-up in downstream circuitry.
Can TLV77312PDBVR operate with a 1.5V input supply?
Yes - TLV77312PDBVR supports input voltages as low as 1.4V. With a 1.2V output and 180mV dropout, it regulates fully down to VIN = 1.38V, making it viable for single-cell alkaline or NiMH battery applications where voltage sags below 1.5V under load.
What thermal considerations apply to TLV77312PDBVR in SOT-23-5 package?
TLV77312PDBVR in DBV package has RθJA = 242.5°C/W. At 300mA and 1.2V output with 3.3V input, power dissipation is ~630mW, causing ~153°C rise above ambient - exceeding safe limits. Use copper pour, thermal vias, and derate current to maintain TJ ≤ 125°C in sustained operation.
TLV77312PDBVR 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):
- 1.2V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.68V @ 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
TLV77312PDBVR FAQ
1.How can I place an order for TLV77312PDBVR through Aetrix?
Please submit a Request for Quotation (RFQ) for TLV77312PDBVR 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 TLV77312PDBVR reliable?
The price and inventory of TLV77312PDBVR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLV77312PDBVR is usually 5 days.
3.What payment methods are accepted for TLV77312PDBVR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TLV77312PDBVR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TLV77312PDBVR?
TLV77312PDBVR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TLV77312PDBVR 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 TLV77312PDBVR?
For technical support, including TLV77312PDBVR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLV77312PDBVR requirements.
6.How does Aetrix verify that TLV77312PDBVR is sourced from the original manufacturer or authorized distributors?
All TLV77312PDBVR 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 TLV77312PDBVR meets industry standards.
7.What is the process for return or replacement of TLV77312PDBVR?
All TLV77312PDBVR units undergo pre-shipment inspection (PSI). If there is an issue with TLV77312PDBVR, 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 TLV77312PDBVR part is unused and in its original packaging.
Return procedure for TLV77312PDBVR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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