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Texas Instruments LP3995ILD-1.5/NOPB
- Part No.:
- LP3995ILD-1.5/NOPB
- Manufacturer:
- Texas Instruments
- Package:
- 6-WDFN Exposed Pad
- Datasheet:
-
LP3995ILD-1.5/NOPB.pdf
- Description:
- IC REG LINEAR 1.5V 150MA 6WSON
- Quantity:
- Payment:
- Shipping:
Inventory:2,000
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Product details
Overview
LP3995ILD-1.5/NOPB from Texas Instruments is a micropower 150-mA CMOS low-dropout linear regulator with fixed 1.5 V output, 60 mV typical dropout at full load, ±75 mV output voltage tolerance, and active shutdown enabling <1.5 µA quiescent current in disable mode. It powers RF/analog circuitry in space-constrained portable devices requiring ultra-low noise and fast enable control.
For engineers reviewing the LP3995ILD-1.5/NOPB datasheet, LP3995ILD-1.5/NOPB pinout, LP3995ILD-1.5/NOPB application, or LP3995ILD-1.5/NOPB equivalent, key selection criteria include its DSBGA-5 package footprint (1.502 mm × 1.045 mm), 25 µVRMS output noise (10 Hz–100 kHz), 30 µs turnon time, 175 µs turnoff time with active discharge, and stability with 1-µF ceramic output capacitor.
Technical Context
The LP3995ILD-1.5/NOPB implements a CMOS-based LDO architecture with bandgap reference, error amplifier, and pass transistor controlled by logic-level EN input. Its BYPASS pin connects directly to the high-impedance node of the internal reference, enabling external 10 nF capacitor placement to suppress output noise without degrading transient response.
It integrates thermal-overload protection (trip at ~160°C, hysteresis ~20°C) and short-circuit current limiting (~450 mA). The device operates across −40°C to +125°C junction temperature and maintains regulation down to zero load, supporting keep-alive functions in battery-backed memory systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.5 V ±75 mV (±5% absolute accuracy over −40°C to +125°C) |
| Max Output Current | 150 mA continuous; supports peak loads without foldback or thermal shutdown under proper PCB layout |
| Dropout Voltage | 60 mV typical at 150 mA load; enables operation from 2.5 V input down to 1.56 V supply headroom |
| Quiescent Current | 85–200 µA during regulation; drops to ≤1.5 µA when disabled via EN pin |
| Output Noise | 25 µVRMS (10 Hz–100 kHz); reduced further with 10 nF BYPASS capacitor |
| PSRR | 60 dB at 1 kHz; maintains signal integrity in noisy power domains like RF transceivers |
| Enable Thresholds | VIL = 0.4 V max, VIH = 0.9 V min; compatible with 1.8 V/3.3 V logic without level shifting |
Pinout & Package
LP3995ILD-1.5/NOPB uses the YZR (DSBGA-5) package: 1.502 mm × 1.045 mm body size, 5-ball array, bottom-exposed die pad connected to GND. No thermal pad soldering required for basic operation; recommended for enhanced thermal performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN (Ball C3) | Input supply connection | Accepts 2.5 V–6 V; requires 1 µF ceramic capacitor within 1 cm of pin for stability |
| GND (Ball B2) | Power ground reference | Common return path for IN, OUT, EN, and BYPASS; ties to PCB ground plane |
| EN (Ball A1) | Logic-controlled enable input | Active-high; ≥0.9 V enables regulator, ≤0.4 V disables with active output discharge |
| BYPASS (Ball A3) | Noise reduction node | Connects to bandgap reference; 10 nF capacitor reduces output noise and prevents startup overshoot |
| OUT (Ball C1) | Regulated output terminal | Delivers 1.5 V to load; stable with ≥1 µF ceramic capacitor (ESR 5–500 mΩ) |
Key Features
| Feature | Design Value |
|---|---|
| Fast Turnoff with Active Discharge | 175 µs output decay to 5% level; internal FET discharges COUT without external components |
| Ultra-Low Noise Regulation | 25 µVRMS output noise (10 Hz–100 kHz); BYPASS pin enables further noise suppression |
| Zero-Load Stability | Maintains regulation with no output load-critical for CMOS RAM keep-alive and standby circuits |
| Logic-Compatible Enable | VIL ≤0.4 V / VIH ≥0.9 V thresholds allow direct interface with 1.8 V I/O without level shifters |
| Thermal & Short-Circuit Protection | Auto-shutdown at ~160°C junction temp; recovers at ~140°C; limits short-circuit current to ~450 mA |
Applications
| GSM Portable Phones | Bluetooth Devices |
|---|---|
|
Use Scenario: Powering RF transceiver ICs and baseband processors during active call and sleep modes. IC Role / Device Role / Timing Role: Primary 1.5 V supply for analog front-end and low-power digital blocks with fast enable/disable sequencing. Use Value: 30 µs turnon ensures rapid wake-up from deep sleep; 60 mV dropout extends usable battery life by >15 minutes per charge cycle. |
Use Scenario: Supplying 1.5 V to Bluetooth SoC radios and audio codecs in earbuds and wearables. IC Role / Device Role / Timing Role: Low-noise bias source for RF synthesizers and ADC/DAC reference paths. Use Value: 25 µVRMS noise prevents EVM degradation in 2.4 GHz BLE transmission; DSBGA-5 footprint saves >1.2 mm² board area. |
| CDMA Cellular Handsets | Portable Information Appliances |
|
Use Scenario: Delivering clean 1.5 V to CDMA PA driver stages and IF filters under pulsed load conditions. IC Role / Device Role / Timing Role: High-PSRR local regulator decoupling noisy DC-DC converters in multi-rail power systems. Use Value: 60 dB PSRR at 1 kHz rejects switching noise from adjacent buck regulators; 1 µF ceramic compatibility simplifies BOM. |
Use Scenario: Providing always-on 1.5 V for real-time clock, SRAM backup, and sensor interface in handheld PDAs. IC Role / Device Role / Timing Role: Zero-load stable regulator maintaining voltage during extended idle periods. Use Value: ≤1.5 µA shutdown current extends battery shelf life beyond 12 months; no external discharge circuit needed. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar low-noise, micropower LDO applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPL720F15 | Same 1.5 V output, 200 mA rating, but uses WSON-6 package (3.29 mm × 2.92 mm); higher RθJA (68.5°C/W vs 181.2°C/W for DSBGA) | Preferred where thermal margin >10°C is required or PCB layout allows larger footprint | Select TPL720F15 if board space permits larger package and higher thermal mass is beneficial |
| LP2985AIM5-1.5/NOPB | 150 mA, 1.5 V output, SOT-23-5 package; higher dropout (380 mV typ at 150 mA) and higher noise (40 µVRMS) | Suitable for cost-sensitive, non-RF applications where 60 mV dropout and 25 µVRMS noise are not mandatory | Choose LP2985AIM5-1.5/NOPB only when DSBGA assembly capability is unavailable and noise/dropout specs are relaxed |
Compared with LP3995ILD-1.5/NOPB, TPL720F15 offers higher current headroom but sacrifices board-area efficiency, while LP2985AIM5-1.5/NOPB trades critical RF-grade noise and dropout performance for legacy package compatibility and lower cost.
Availability
LP3995ILD-1.5/NOPB is available at Aetrix Electronics and suitable for GSM portable phones, Bluetooth devices, and portable information appliances requiring stable component supply, long-term lifecycle support, and consistent parametric performance across production batches.
Supply support for LP3995ILD-1.5/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 company headquartered in Dallas, Texas, delivering analog and embedded processing solutions for industrial, automotive, and personal electronics markets.
The LP3995 series was designed specifically for ultra-low-noise, micropower regulation in battery-powered RF and portable systems, emphasizing minimal board area, fast enable/disable control, and zero-load stability.
FAQ
What is the maximum input voltage rating for the LP3995ILD-1.5/NOPB?
The LP3995ILD-1.5/NOPB has an absolute maximum input voltage of 6.5 V. Operation above 6 V is not recommended; the recommended operating range is 2.5 V to 6 V. Exceeding 6.5 V risks permanent damage to the internal CMOS pass transistor and bandgap circuitry. Always ensure input transient suppression is implemented if used in environments with voltage spikes.
Does the LP3995ILD-1.5/NOPB require an external bypass capacitor on the BYPASS pin?
Yes-the LP3995ILD-1.5/NOPB requires a 10 nF capacitor between the BYPASS pin and GND to achieve specified 25 µVRMS output noise and prevent startup overshoot. This capacitor connects directly to the high-impedance bandgap reference node; omitting it increases output noise by up to 2× and may cause instability during enable transitions.
Can the LP3995ILD-1.5/NOPB operate without any load connected to the OUT pin?
Yes-the LP3995ILD-1.5/NOPB remains stable and regulated with zero load current, a feature confirmed in Section 9.2.2.4 of the datasheet. This makes it suitable for applications such as SRAM keep-alive, RTC backup, and other always-on low-power circuits where output loading is intermittent or absent.
What is the thermal resistance (RθJA) of the LP3995ILD-1.5/NOPB in its DSBGA package?
The LP3995ILD-1.5/NOPB in the YZR (DSBGA-5) package has a junction-to-ambient thermal resistance (RθJA) of 181.2°C/W under JEDEC High-K board conditions. This value assumes standard PCB copper area; actual thermal performance improves significantly with added thermal vias under the exposed die pad and increased ground plane area.
Is the EN pin of the LP3995ILD-1.5/NOPB compatible with 1.8 V logic levels?
Yes-the EN pin of the LP3995ILD-1.5/NOPB has VIH ≥0.9 V and VIL ≤0.4 V, making it fully compatible with 1.8 V CMOS logic outputs without level translation. Driving EN directly from a 1.8 V microcontroller GPIO ensures reliable enable/disable control across the full −40°C to +125°C temperature range.
LP3995ILD-1.5/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 6-WDFN Exposed Pad
- 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):
- 1.5V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.1V @ 150mA
- Current - Output:
- 150mA
- Current - Quiescent (Iq):
- 150 µA
- Current - Supply (Max):
- 200 µA
- PSRR:
- 60dB ~ 50dB (1kHz ~ 10kHz)
- Control Features:
- Enable
- Protection Features:
- Over Temperature, Short Circuit
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 6-WSON (2.92x3.29)
LP3995ILD-1.5/NOPB FAQ
1.How can I place an order for LP3995ILD-1.5/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LP3995ILD-1.5/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 LP3995ILD-1.5/NOPB reliable?
The price and inventory of LP3995ILD-1.5/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LP3995ILD-1.5/NOPB is usually 5 days.
3.What payment methods are accepted for LP3995ILD-1.5/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LP3995ILD-1.5/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LP3995ILD-1.5/NOPB?
LP3995ILD-1.5/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LP3995ILD-1.5/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 LP3995ILD-1.5/NOPB?
For technical support, including LP3995ILD-1.5/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LP3995ILD-1.5/NOPB requirements.
6.How does Aetrix verify that LP3995ILD-1.5/NOPB is sourced from the original manufacturer or authorized distributors?
All LP3995ILD-1.5/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 LP3995ILD-1.5/NOPB meets industry standards.
7.What is the process for return or replacement of LP3995ILD-1.5/NOPB?
All LP3995ILD-1.5/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LP3995ILD-1.5/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 LP3995ILD-1.5/NOPB part is unused and in its original packaging.
Return procedure for LP3995ILD-1.5/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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