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Texas Instruments LP3995ILD-1.8
- Part No.:
- LP3995ILD-1.8
- Manufacturer:
- Texas Instruments
- Package:
- 6-WDFN Exposed Pad
- Datasheet:
-
LP3995ILD-1.8.pdf
- Description:
- IC REG LINEAR 1.8V 150MA 6WSON
- Quantity:
- Payment:
- Shipping:
Inventory:1,670
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Product details
Overview
LP3995ILD-1.8 from Texas Instruments is a micropower 150mA CMOS low-dropout (LDO) voltage regulator in a 6-pin WSON package, delivering a fixed 1.8V output with ±75mV accuracy, 60mV typical dropout at 150mA, and 30µs fast turn-on - designed for RF/analog power domains in portable battery-powered systems.
For engineers reviewing the LP3995ILD-1.8 datasheet, LP3995ILD-1.8 pinout, LP3995ILD-1.8 application, or LP3995ILD-1.8 equivalent, this page delivers verified technical context, real-world timing behavior, ceramic-capacitor stability requirements, thermal performance limits, and validated alternative options for GSM/CDMA/Bluetooth power rail design.
Technical Context
The LP3995ILD-1.8 implements a CMOS-based LDO architecture with internal bandgap reference, active discharge circuitry on VOUT for fast shutdown, and logic-controlled enable input (VEN) with 0.4V low-threshold and 0.9V high-threshold. It operates across 2.5V–6.0V input range and supports −40°C to +125°C junction temperature.
Its stability is guaranteed with 1.0µF ceramic output capacitor (ESR 5–500mΩ) and requires a 0.01µF bypass capacitor on CBP pin to suppress noise at the reference node. The device features thermal overload and short-circuit protection, with 160°C thermal shutdown and 450mA current limit.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.8V ±75mV (±4.2% tolerance), suitable for core logic and RF IC biasing requiring tight DC regulation. |
| Max Output Current | 150mA continuous - sufficient for powering baseband processors, Bluetooth radios, or sensor signal chains. |
| Dropout Voltage | 60mV typical at 150mA load - enables operation down to VIN = 1.86V, extending battery runtime in single-cell Li-ion or Li-poly systems. |
| Quiescent Current | 85–150µA active; <1.5µA when disabled - critical for standby power budget in always-on wireless modules. |
| Turn-On / Turn-Off Time | 30µs typical turn-on; 175µs typical turn-off - ensures rapid power sequencing for burst-mode transceivers. |
| Noise Performance | 25µVRMS (10Hz–100kHz) - low enough for analog front-ends and PLL power supplies without additional filtering. |
| Input Voltage Range | 2.5V to 6.0V - compatible with single-cell Li-ion (3.0–4.2V), dual-cell alkaline, or USB-powered systems. |
| Stability Capacitor | Stable with 1.0µF ceramic output capacitor (X7R/Y5V/Z5U, ESR 5–500mΩ) - reduces board area vs. tantalum alternatives. |
Pinout & Package
LP3995ILD-1.8 uses the 6-pin WSON package (NGD0006A footprint, 2.0mm × 2.0mm × 0.75mm), with exposed thermal pad connected to GND for improved thermal conduction (θJA = 88°C/W).
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 (VIN) | Input voltage supply | Accepts 2.5–6.0V; requires 1.0µF ceramic decoupling within 1cm of pin for stability. |
| 2 (GND) | Power ground reference | Common return path for input/output currents; must connect to low-impedance ground plane. |
| 3 (VEN) | Logic-enable control input | Active-high: ≥0.9V enables regulator; ≤0.4V disables it and reduces quiescent current to <1.5µA. |
| 4 (CBYPASS) | Noise reduction bypass node | Connects directly to internal bandgap reference; requires 0.01µF ceramic capacitor to ground for optimal PSRR. |
| 5 (N/C) | No internal connection | Unbonded pin - must remain unconnected on PCB; no trace or solder mask opening required. |
| 6 (VOUT) | Regulated output voltage | Delivers stable 1.8V to load; includes active discharge FET for fast turn-off (175µs) when VEN is low. |
Key Features
| Feature | Design Value |
|---|---|
| Active discharge on VOUT | Enables 175µs fast turn-off by discharging output capacitance internally - eliminates need for external bleed resistor. |
| Ceramic capacitor compatibility | Stable with 1.0µF X7R/Y5V ceramic output cap (ESR 5–500mΩ) - reduces solution size and cost vs. tantalum alternatives. |
| Ultra-low shutdown current | <1.5µA typical when disabled - preserves battery life in sleep modes of portable handsets and IoT endpoints. |
| Thermal and short-circuit protection | 160°C thermal shutdown with 20°C hysteresis and 450mA current limiting - prevents damage during fault conditions. |
| Wide operating temperature range | −40°C to +125°C junction temperature - qualified for automotive infotainment, industrial handhelds, and outdoor wireless gear. |
Applications
| GSM Portable Phones | Bluetooth Devices |
|---|---|
|
Use Scenario: Powering RF transceiver ICs and baseband processors during call setup and data transmission bursts. IC Role / Device Role / Timing Role: Provides clean, low-noise 1.8V supply with fast enable/disable to synchronize with TDMA slot timing. Use Value: 25µVRMS noise and 30µs turn-on ensure minimal phase noise impact on GSM transmit spectrum and meet 3GPP spurious emission limits. |
Use Scenario: Supplying Bluetooth SoC core voltage (VDD_CORE) in wearables and audio accessories with aggressive power cycling. IC Role / Device Role / Timing Role: Delivers regulated 1.8V with active discharge to meet Bluetooth LE sleep-to-wake latency requirements (<100µs). Use Value: 175µs turn-off and <1.5µA shutdown current extend coin-cell battery life beyond 12 months in BLE beacon applications. |
| CDMA Cellular Handsets | Portable Information Appliances |
|
Use Scenario: Biasing CDMA power amplifier driver stages and analog front-end components in multi-band handsets. IC Role / Device Role / Timing Role: Supplies low-noise 1.8V rail isolated from noisy digital switching domains via ceramic decoupling and CBP bypass. Use Value: 55dB PSRR at 1kHz and 60mV dropout preserve PA linearity and ACPR performance under varying battery voltage (3.4–4.2V). |
Use Scenario: Powering microcontroller I/O banks and touch controller interfaces in handheld PDAs and medical diagnostic pens. IC Role / Device Role / Timing Role: Regulates 1.8V for mixed-signal peripherals requiring stable reference and glitch-free enable sequencing. Use Value: ±75mV output tolerance and no-load stability ensure reliable operation during intermittent sensor polling and display backlight transitions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPL720F18 | 1.8V, 200mA, 45µVRMS noise, 250mV dropout at 200mA, 5-pin SOT-23 package. | Higher noise floor and larger dropout reduce suitability for RF-sensitive 1.8V rails. | Prefer LP3995ILD-1.8 where fast turn-off (<200µs) and ultra-low shutdown current (<1.5µA) are mandatory. |
| TPS7A0518 | 1.8V, 200mA, 10µVRMS noise, 170mV dropout at 200mA, 6-pin WSON (same footprint). | Lower noise but higher dropout and no active discharge - slower turn-off (≈500µs) and no output discharge path. | Choose LP3995ILD-1.8 when active output discharge and sub-200µs turn-off are required for time-critical RF power gating. |
Compared with TPL720F18 and TPS7A0518, the LP3995ILD-1.8 uniquely combines 175µs active turn-off, <1.5µA shutdown current, and ceramic-stable 1.8V regulation in a compact WSON package - making it optimal for battery-constrained, fast-switching RF power domains where output discharge and timing precision are non-negotiable.
Availability
LP3995ILD-1.8 is available at Aetrix Electronics and suitable for GSM/CDMA handset design, Bluetooth peripheral development, and portable medical instrumentation requiring stable component supply, long-lifecycle support, and RoHS-compliant green packaging.
Supply support for LP3995ILD-1.8 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 connectivity technologies, with decades of LDO design expertise for portable and industrial applications.
The LP3995 series was engineered specifically for micropower, fast-response voltage regulation in space-constrained RF/analog subsystems - emphasizing ceramic capacitor compatibility, active discharge, and extended temperature operation.
FAQ
What is the maximum input voltage rating for the LP3995ILD-1.8?
The LP3995ILD-1.8 has an absolute maximum input voltage of 6.5V, but its specified operating input range is 2.5V to 6.0V. Exceeding 6.0V may cause parametric degradation or reliability risk, even if below the 6.5V absolute limit. Always maintain VIN ≤ 6.0V in normal operation per the Electrical Characteristics table.
Does the LP3995ILD-1.8 require an external pull-up on the VEN pin?
No - the LP3995ILD-1.8 does not require an external pull-up on VEN. When left floating, leakage current is insufficient to guarantee enable state; TI recommends tying VEN directly to VIN for permanent operation or driving it actively between 0V and ≥0.9V. The VEN input draws only 0.001µA max at 0V, enabling direct GPIO control.
Can the LP3995ILD-1.8 be used with a 0.47µF output capacitor?
No - the LP3995ILD-1.8 is not guaranteed stable with 0.47µF output capacitance. The datasheet specifies a minimum of 1.0µF (±30%) ceramic capacitor with ESR between 5mΩ and 500mΩ. Using 0.47µF risks oscillation or poor transient response, especially under load steps. Always use ≥1.0µF per the Recommended Output Capacitor table.
What is the thermal resistance (θJA) of the LP3995ILD-1.8 package?
The LP3995ILD-1.8 uses the 6-pin WSON package (NGD0006A) with a junction-to-ambient thermal resistance (θJA) of 88°C/W under standard JEDEC test conditions. This value assumes proper PCB layout with thermal vias to inner ground planes; actual θJA will vary based on copper area and airflow.
Is the LP3995ILD-1.8 pin-compatible with other LP3995 variants like LP3995ILD-2.8?
Yes - all LP3995ILD-x.x variants share identical 6-pin WSON (NGD0006A) packaging, pinout, and footprint. The only differences are output voltage (1.5V/1.8V/2.8V/3.0V) and device marking (e.g., L022B for LP3995ILD-1.8). No PCB redesign is needed when substituting fixed-output versions within the same package family.
LP3995ILD-1.8 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 6-WDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Output Configuration:
- Positive
- Output Type:
- Fixed
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 6V
- Voltage - Output (Min/Fixed):
- 1.8V
- 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-1.8 FAQ
1.How can I place an order for LP3995ILD-1.8 through Aetrix?
Please submit a Request for Quotation (RFQ) for LP3995ILD-1.8 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-1.8 reliable?
The price and inventory of LP3995ILD-1.8 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LP3995ILD-1.8 is usually 5 days.
3.What payment methods are accepted for LP3995ILD-1.8?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LP3995ILD-1.8 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LP3995ILD-1.8?
LP3995ILD-1.8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LP3995ILD-1.8 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-1.8?
For technical support, including LP3995ILD-1.8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LP3995ILD-1.8 requirements.
6.How does Aetrix verify that LP3995ILD-1.8 is sourced from the original manufacturer or authorized distributors?
All LP3995ILD-1.8 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-1.8 meets industry standards.
7.What is the process for return or replacement of LP3995ILD-1.8?
All LP3995ILD-1.8 units undergo pre-shipment inspection (PSI). If there is an issue with LP3995ILD-1.8, 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-1.8 part is unused and in its original packaging.
Return procedure for LP3995ILD-1.8:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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