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Texas Instruments TPS70919DBVT
- Part No.:
- TPS70919DBVT
- Manufacturer:
- Texas Instruments
- Package:
- SC-74A, SOT-753
- Datasheet:
-
TPS70919DBVT.pdf
- Description:
- IC REG LINEAR 1.9V 150MA SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:738
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Product details
Overview
TPS70919DBVT from Texas Instruments is a 150-mA, ultra-low-quiescent-current (1 µA) linear voltage regulator in SOT-23-5 package, delivering fixed 1.9 V output with ±2% accuracy over –40°C to +125°C. It features reverse-current protection, thermal shutdown, current limiting, and enable control - designed for battery-powered always-on systems such as smoke detectors and PIR motion sensors where idle power must be minimized.
For engineers reviewing the TPS70919DBVT datasheet, TPS70919DBVT pinout, TPS70919DBVT application, or TPS70919DBVT equivalent, key selection criteria include its 1-µA IQ, 150-nA shutdown current, 2.7–30-V input range, reverse-current blocking capability, and SOT-23-5 thermal performance (RθJA = 212.1°C/W).
Technical Context
The TPS70919DBVT uses a PMOS pass transistor architecture enabling low dropout voltage and inherent reverse-current protection without external components. Its precision band-gap reference and error amplifier ensure 2% output accuracy across temperature and load.
Functional modes are controlled via the EN pin: pulled high (>0.9 V) for regulation, pulled low (<0.4 V) for 150-nA shutdown, or left floating (internally biased by 300-nA current source). The device includes undervoltage lockout (UVLO), thermal shutdown at 158°C, and current limit starting at ≥200 mA.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.9 V ±2% over –40°C to +125°C - enables direct replacement of 1.8-V/2.0-V rails with margin for aging and tolerance. |
| Quiescent Current (IQ) | 1 µA typical - allows >10-year battery life in 10-µA system standby budgets (e.g., smoke detector sleep mode). |
| Input Voltage Range | 2.7 V to 30 V - supports wide-input industrial batteries (e.g., 9-V alkaline, 12-V lead-acid, 24-V bus) without pre-regulation. |
| Shutdown Current | 150 nA typical at VEN ≤ 0.4 V - reduces leakage-dominated battery drain during deep sleep or fault lockout. |
| Dropout Voltage | ~460 mV at 150 mA (typical, extrapolated from TPS70912/TPS70933 curves) - ensures regulation down to VIN ≈ 2.36 V under full load. |
| PSRR | 80 dB at 10 Hz, 62 dB at 100 Hz - suppresses low-frequency ripple from switching converters or noisy battery sources. |
| Reverse Current | <10 nA from OUT to IN - prevents battery discharge when multiple supplies coexist (e.g., backup coin cell + main battery). |
Pinout & Package
SOT-23-5 package (2.90 mm × 1.60 mm body size) with exposed pad thermally connected to GND; requires PCB copper pour for optimal thermal performance (RθJB = 39.5°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (OUT) | Regulated output | Delivers stable 1.9 V; requires ≥2.2-µF ceramic capacitor to GND for stability and transient response. |
| 2 (GND) | Ground reference | Common return for input, output, and enable; thermal pad must be soldered to GND plane for thermal reliability. |
| 3 (IN) | Unregulated input | Accepts 2.7–30 V; internal UVLO prevents startup below ~2.3 V; add 0.1–2.2-µF input cap for noise filtering. |
| 4 (EN) | Enable control | Active-high logic; 0.9 V threshold; internally biased - can float to enable; clamped to 6.5 V max. |
| 5 (NC) | No internal connection | Not bonded; must remain unconnected - no routing or stitching required. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low quiescent current | 1 µA IQ enables multi-year operation on CR2032 or AA cells in intermittent-sensing applications. |
| Reverse-current protection | Blocks <10 nA backflow from OUT to IN - eliminates need for external blocking diode in dual-supply or hot-swap designs. |
| Thermal & current protection | Auto-recovering thermal shutdown (158°C trip) and ≥200 mA current limit prevent damage during overload or short-circuit. |
| Wide input voltage range | 2.7–30 V operation supports legacy and emerging battery chemistries (LiFePO₄, alkaline, NiMH, 24-V industrial rails). |
| Fixed 1.9-V output | Optimized for low-power microcontrollers (e.g., MSP430, nRF52) and analog sensors requiring precise sub-2-V biasing. |
Applications
| Smoke Detectors | Motion Sensors (PIR) |
|---|---|
|
Use Scenario: Battery-powered residential smoke alarm operating in low-power sleep mode >99.9% of time, waking every 60 seconds to sample ionization chamber. IC Role / Device Role / Timing Role: Primary 1.9-V supply for MCU and analog front-end; regulates from 9-V alkaline stack with minimal self-discharge impact. Use Value: 1-µA IQ extends 9-V battery life beyond 10 years; reverse-current protection prevents discharge into auxiliary CO sensor rail. |
Use Scenario: Passive infrared (PIR) occupancy sensor in smart lighting, powered by two AA cells, transmitting only on detection. IC Role / Device Role / Timing Role: Stable 1.9-V bias for PIR signal conditioning amplifier and ultra-low-power BLE SoC during wake-up bursts. Use Value: 150-nA shutdown current preserves battery during 30-minute detection windows; 2% accuracy maintains ADC reference integrity. |
| Thermostats | Electricity Meters |
|
Use Scenario: Wireless HVAC thermostat using LiSOCl₂ primary cell, sampling ambient temperature every 30 seconds and transmitting hourly. IC Role / Device Role / Timing Role: Main LDO for RF transceiver and precision temperature sensor; enabled only during active measurement/transmit cycles. Use Value: EN pin control enables synchronous power gating; 30-V input headroom accommodates surge events on building power lines. |
Use Scenario: Solid-state electricity meter with optical isolation, running from 3-phase 230-V AC via capacitive dropper, requiring isolated 1.9-V rail for metrology ASIC. IC Role / Device Role / Timing Role: Post-isolation LDO providing clean, accurate 1.9-V supply for delta-sigma ADC reference and real-time clock. Use Value: 80-dB PSRR at 10 Hz rejects 50/60-Hz line harmonics; ±2% output accuracy ensures <0.1% energy measurement error. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ultra-low-IQ LDO applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS70918DBVT | Fixed 1.8 V output; identical IQ (1 µA), shutdown (150 nA), package, and protection features. | Used where 1.8-V logic compatibility is mandatory (e.g., certain FPGA I/O banks or memory interfaces). | Select when system requires exact 1.8-V compliance; not drop-in for 1.9-V-dependent analog references. |
| MCP1700T-1902E/TT | 1.9-V fixed output, 1.6-µA IQ, SOT-23-3 (no EN pin), 6-V max input, no reverse-current protection. | Suitable for cost-sensitive, single-rail, low-voltage-only designs (e.g., simple MCU boards with 3.3-V input). | Choose only if input stays ≤6 V and EN control/reverse protection are unnecessary; lacks 30-V robustness and safety features. |
Compared with TPS70919DBVT, TPS70918DBVT offers identical performance at 1.8 V but cannot replace 1.9-V accuracy-critical loads; MCP1700T-1902E/TT trades input range, enable flexibility, and reverse-current blocking for lower cost and smaller footprint in non-industrial use cases.
Availability
TPS70919DBVT is available at Aetrix Electronics and suitable for smoke detectors, PIR motion sensors, thermostats, and electricity meters requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for TPS70919DBVT 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 focused on analog and embedded processing technologies, with decades of expertise in power management IC design and high-volume manufacturing reliability.
The TPS709 series was engineered specifically for ultra-low-power, wide-input industrial and safety-critical sensing applications - prioritizing quiescent current, reverse-current blocking, and thermal resilience over speed or high-current capability.
FAQ
What is the maximum input voltage rating for the TPS70919DBVT?
The TPS70919DBVT has an absolute maximum input voltage of 32 V, with recommended operation up to 30 V. Exceeding 32 V risks permanent damage. Its 2.7–30-V operating range makes it suitable for 9-V, 12-V, and 24-V battery or industrial bus applications without external regulators.
Does the TPS70919DBVT require an input capacitor?
The TPS70919DBVT does not require an input capacitor for stability, but TI recommends a 0.1–2.2-µF ceramic capacitor from IN to GND to improve transient response, reduce input ripple, and enhance PSRR - especially critical when sourced from noisy switchers or long traces.
Can the TPS70919DBVT be used without connecting the EN pin?
Yes - the TPS70919DBVT features an internal 300-nA current source that pulls EN high, so leaving EN unconnected enables the device. However, avoid floating EN in noisy environments; tie to IN (via resistor) or GND for deterministic control during power sequencing.
What is the thermal performance of the TPS70919DBVT in SOT-23-5 package?
In the DBVT (SOT-23-5) package, the TPS70919DBVT has RθJA = 212.1°C/W (JEDEC low-K board) and RθJB = 39.5°C/W. For reliable operation at 150 mA, maintain PCB copper area under the thermal pad and use ≥2 thermal vias to inner GND planes to limit junction temperature rise.
How does reverse-current protection work in the TPS70919DBVT?
The TPS70919DBVT integrates active reverse-current protection that blocks current flow from OUT to IN whenever VOUT > VIN, limiting leakage to <10 nA. This function operates independently of EN state and remains active even at VOUT < 1.8 V, eliminating external diodes in battery-backup or multi-rail systems.
TPS70919DBVT 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):
- 30V
- Voltage - Output (Min/Fixed):
- 1.9V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- -
- Current - Output:
- 150mA
- Current - Quiescent (Iq):
- 2.05 µA
- Current - Supply (Max):
- 350 µA
- PSRR:
- 80dB ~ 52dB (10Hz ~ 1kHz)
- Control Features:
- Enable
- Protection Features:
- Over Current, Over Temperature, Reverse Current, Under Voltage Lockout (UVLO)
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-5
TPS70919DBVT FAQ
1.How can I place an order for TPS70919DBVT through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS70919DBVT 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 TPS70919DBVT reliable?
The price and inventory of TPS70919DBVT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS70919DBVT is usually 5 days.
3.What payment methods are accepted for TPS70919DBVT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS70919DBVT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS70919DBVT?
TPS70919DBVT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS70919DBVT 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 TPS70919DBVT?
For technical support, including TPS70919DBVT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS70919DBVT requirements.
6.How does Aetrix verify that TPS70919DBVT is sourced from the original manufacturer or authorized distributors?
All TPS70919DBVT 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 TPS70919DBVT meets industry standards.
7.What is the process for return or replacement of TPS70919DBVT?
All TPS70919DBVT units undergo pre-shipment inspection (PSI). If there is an issue with TPS70919DBVT, 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 TPS70919DBVT part is unused and in its original packaging.
Return procedure for TPS70919DBVT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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