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Texas Instruments LP3990TL-0.8/NOPB
- Part No.:
- LP3990TL-0.8/NOPB
- Manufacturer:
- Texas Instruments
- Package:
- 4-WFBGA, DSBGA
- Datasheet:
-
LP3990TL-0.8/NOPB.pdf
- Description:
- IC REG LINEAR 0.8V 150MA 4DSBGA
- Quantity:
- Payment:
- Shipping:
Inventory:1,250
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Product details
Overview
LP3990TL-0.8/NOPB from Texas Instruments is a 150-mA, 0.8-V fixed-output linear voltage regulator in a 4-pin DSBGA package, designed for space-constrained digital applications requiring ultra-low quiescent current (43 µA enabled, <10 nA disabled), high voltage accuracy (±1% at 25°C), and stability with only 1-µF ceramic input/output capacitors. It operates from 2 V to 6 V input and delivers regulated power to core logic, RF ICs, and low-voltage microcontrollers in portable battery-powered systems.
For engineers reviewing the LP3990TL-0.8/NOPB datasheet, LP3990TL-0.8/NOPB pinout, LP3990TL-0.8/NOPB application, or LP3990TL-0.8/NOPB equivalent, key selection considerations include dropout voltage (120 mV at 150 mA), PSRR (55 dB at 1 kHz), fast start-up time (105 µs), thermal shutdown threshold (155°C), and compatibility with 0402/0603 ceramic capacitors without noise-bypass requirements.
Technical Context
The LP3990TL-0.8/NOPB integrates a precision bandgap reference, error amplifier, and PMOS pass transistor optimized for low-noise, low-IQ operation across –40°C to 125°C junction temperature. Its enable circuit includes a 1-MΩ internal pull-down resistor and defined VIH/VIL thresholds (0.95 V / 0.4 V) for reliable logic-level control.
It employs no external compensation and achieves stability with minimal 1-µF ceramic output capacitance due to inherent phase-margin optimization-eliminating need for noise-bypass caps while maintaining 150 µVRMS output noise and 55 dB PSRR at 1 kHz under 1–150 mA load range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 0.8 V ±1% at 25°C; supports core voltage scaling for sub-1V digital ICs. |
| Max Output Current | 150 mA continuous; sufficient for single-core processors, memory I/O, and RF transceivers. |
| Dropout Voltage | 120 mV (typ) at 150 mA; enables regulation down to VIN = 0.92 V, critical for deep battery discharge. |
| Quiescent Current | 43 µA (enabled), <10 nA (disabled); extends battery life in always-on sensor nodes and standby modes. |
| PSRR | 55 dB at 1 kHz; suppresses switching noise from DC/DC converters feeding the LDO input. |
| Start-Up Time | 105 µs (to 95% VOUT); meets fast wake-up timing for low-power microcontroller sleep-to-active transitions. |
| Thermal Shutdown | 155°C activation with 15°C hysteresis; protects against sustained overload without requiring external thermal management. |
Pinout & Package
LP3990TL-0.8/NOPB uses a 4-ball DSBGA (YZR) package measuring 1.324 mm × 1.045 mm (max), with bottom-side thermal pad connected internally to GND (Pin 2). The compact footprint targets ultra-thin mobile PCBs and wearable devices where board area is constrained.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN (B2) | Input supply connection | Accepts 2–6 V; requires 1-µF ceramic capacitor within 1 cm to minimize input impedance and ensure stability. |
| EN (A2) | Logic-controlled enable input | Active-high; 0.95 V min VIH ensures compatibility with 1.8-V/3.3-V GPIO; internal 1-MΩ pull-down guarantees default-off state. |
| GND (A1) | Common ground reference | Return path for IN, OUT, and EN; must be low-impedance and tied directly to thermal pad for optimal thermal performance. |
| OUT (B1) | Regulated output terminal | Delivers stable 0.8 V; requires 1-µF ceramic capacitor with ESR 5–500 mΩ placed adjacent to pin for transient response. |
Key Features
| Feature | Design Value |
|---|---|
| Fixed 0.8-V output | Eliminates external feedback resistors, reducing BOM count and layout complexity for ASIC/FPGA core rails. |
| Ceramic-capacitor stability | Validated with 1-µF X7R/X5R ceramics-enables use of 0402/0603 packages, cutting board area by >50% vs. tantalum alternatives. |
| No noise-bypass capacitor required | Integrated noise suppression architecture reduces component count and avoids parasitic resonance issues common with bypass caps. |
| Virtually zero shutdown IQ | <10 nA disable current prevents battery drain in long-term storage or deep-sleep modes (e.g., IoT edge sensors). |
| Thermal and short-circuit protection | Auto-recovering shutdown prevents permanent damage during fault conditions without external current-limiting circuitry. |
Applications
| Mobile Baseband Processor Power | Wearable Sensor Hub Supply |
|---|---|
Use Scenario: Powers ARM Cortex-M core and SRAM in LTE modem SoC during active data transmission. IC Role / Device Role / Timing Role: Primary low-noise core LDO delivering 0.8 V at up to 150 mA with <105 µs wake-up latency. Use Value: Enables dynamic voltage scaling while maintaining PSRR >55 dB to reject noise from adjacent RF power amplifiers. |
Use Scenario: Supplies ultra-low-power accelerometer, gyroscope, and BLE radio in fitness tracker during motion-triggered wake-up. IC Role / Device Role / Timing Role: Always-on rail with <10 nA shutdown IQ, activated via GPIO-driven EN signal upon motion detection. Use Value: Extends coin-cell battery life beyond 12 months by minimizing quiescent loss during 99.9% idle time. |
| Portable Medical Diagnostic Module | Industrial Handheld Scanner |
Use Scenario: Provides clean 0.8-V bias to ADC front-end and low-dropout op-amps in point-of-care ECG device. IC Role / Device Role / Timing Role: Precision analog rail with 150 µVRMS noise and ±1% output tolerance over –40°C to 85°C operating range. Use Value: Maintains clinical-grade signal integrity without additional filtering, reducing system calibration burden. |
Use Scenario: Regulates power to barcode image sensor and FPGA logic in warehouse handheld scanner operating on Li-ion battery. IC Role / Device Role / Timing Role: Input-stage LDO accepting 3.2–4.2 V battery range and delivering stable 0.8 V to digital core. Use Value: Sustains full functionality down to 3.0 V battery voltage via 120-mV dropout, avoiding premature shutdown. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar low-IQ fixed-output LDO applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPL720F18-DBVR | 0.8-V output, 200-mA rating, 50-µA IQ (enabled), 10-nA shutdown IQ; WSON-6 package (2.9 × 1.6 mm). | Larger footprint and higher IQ limit use in space-constrained wearables; better suited for higher-current peripherals. | Select when >150 mA load or enhanced thermal dissipation (RθJA = 53.9°C/W) is required. |
| MCP1804T-0802E/MB | 0.8-V output, 150-mA rating, 3.5-µA IQ (enabled), 1-µA shutdown IQ; SOT-23-5 package (3.0 × 3.0 mm). | Lower IQ improves battery life but slower 300-µs start-up limits real-time wake-up; larger SOT-23 footprint increases board area. | Select for ultra-low-power applications where start-up latency is non-critical and board space permits SOT-23. |
Compared with TPL720F18-DBVR and MCP1804T-0802E/MB, LP3990TL-0.8/NOPB uniquely balances ultra-small DSBGA size, 105-µs start-up, and 43-µA enabled IQ-making it optimal for miniaturized, latency-sensitive digital loads where both footprint and responsiveness are constrained.
Availability
LP3990TL-0.8/NOPB is available at Aetrix Electronics and suitable for cellular handsets, wearable health monitors, portable medical diagnostics, and industrial handheld scanners requiring stable component supply with guaranteed long-term manufacturability and traceable sourcing.
Supply support for LP3990TL-0.8/NOPB 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 and embedded processing technologies, with decades of expertise in power management IC design for portable and industrial applications.
The LP3990TL-0.8/NOPB belongs to TI's LP39xx family of ultra-low-noise, low-IQ LDOs engineered specifically for battery-powered digital systems demanding high accuracy, small size, and ceramic-capacitor simplicity.
FAQ
What is the minimum input voltage required for LP3990TL-0.8/NOPB to regulate 0.8 V output?
The LP3990TL-0.8/NOPB requires a minimum input voltage of 2 V or (VOUT + VDO), whichever is greater. With a typical dropout voltage of 120 mV at 150 mA, LP3990TL-0.8/NOPB regulates properly at VIN ≥ 0.92 V-but per datasheet specifications, the absolute minimum valid input is 2 V to ensure full functional operation across temperature and process variation.
Can LP3990TL-0.8/NOPB operate without an output capacitor?
No-LP3990TL-0.8/NOPB requires a minimum 0.7 µF ceramic output capacitor (1 µF recommended) connected between OUT and GND for stability. Omitting COUT causes oscillation and unregulated output. The device is optimized for 1-µF X7R/X5R ceramics with 5–500 mΩ ESR; tantalum or electrolytic types are not recommended due to ESR and aging limitations.
Does LP3990TL-0.8/NOPB require a noise-bypass capacitor?
No-LP3990TL-0.8/NOPB is explicitly designed to operate without a noise-bypass capacitor. Its internal architecture achieves 150 µVRMS output noise and 55 dB PSRR at 1 kHz using only the standard 1-µF input and output ceramic capacitors, eliminating component count and potential resonance risks associated with bypass caps.
What happens if the EN pin of LP3990TL-0.8/NOPB is left floating?
If the EN pin of LP3990TL-0.8/NOPB is left unconnected, its internal 1-MΩ pull-down resistor forces VEN ≤ 0.4 V, placing the device in shutdown mode with output disabled and quiescent current <10 nA. To ensure reliable operation, EN must be actively driven above 0.95 V to enable regulation.
Is LP3990TL-0.8/NOPB compatible with 0402-size ceramic capacitors?
Yes-LP3990TL-0.8/NOPB is validated for use with 0402 ceramic capacitors (e.g., 1 µF, 6.3 V, X5R) as both input and output capacitors. However, designers must verify DC bias derating: at 0.8 V output, 0402 X5R caps typically retain >85% nominal capacitance, satisfying the 0.7 µF minimum requirement across temperature and bias conditions.
LP3990TL-0.8/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 4-WFBGA, DSBGA
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Output Configuration:
- Positive
- Output Type:
- Fixed
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 6V
- Voltage - Output (Min/Fixed):
- 0.8V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.2V @ 150mA
- Current - Output:
- 150mA
- Current - Quiescent (Iq):
- 80 µA
- Current - Supply (Max):
- 120 µA
- PSRR:
- 55dB ~ 35dB (1kHz ~ 10kHz)
- Control Features:
- Enable
- Protection Features:
- Over Temperature, Short Circuit
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 4-DSBGA (1x1)
LP3990TL-0.8/NOPB FAQ
1.How can I place an order for LP3990TL-0.8/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LP3990TL-0.8/NOPB 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 LP3990TL-0.8/NOPB reliable?
The price and inventory of LP3990TL-0.8/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LP3990TL-0.8/NOPB is usually 5 days.
3.What payment methods are accepted for LP3990TL-0.8/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LP3990TL-0.8/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LP3990TL-0.8/NOPB?
LP3990TL-0.8/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LP3990TL-0.8/NOPB 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 LP3990TL-0.8/NOPB?
For technical support, including LP3990TL-0.8/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LP3990TL-0.8/NOPB requirements.
6.How does Aetrix verify that LP3990TL-0.8/NOPB is sourced from the original manufacturer or authorized distributors?
All LP3990TL-0.8/NOPB 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 LP3990TL-0.8/NOPB meets industry standards.
7.What is the process for return or replacement of LP3990TL-0.8/NOPB?
All LP3990TL-0.8/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LP3990TL-0.8/NOPB, 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 LP3990TL-0.8/NOPB part is unused and in its original packaging.
Return procedure for LP3990TL-0.8/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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