My Inquiry
My Account
Texas Instruments LP3875ESX-ADJ/NOPB
- Part No.:
- LP3875ESX-ADJ/NOPB
- Manufacturer:
- Texas Instruments
- Package:
- TO-263-6, D2PAK (5 Leads + Tab), TO-263BA
- Datasheet:
-
LP3875ESX-ADJ/NOPB.pdf
- Description:
- IC REG LINEAR POS ADJ 1.5A DDPAK
- Quantity:
- Payment:
- Shipping:
Inventory:900
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LP3875ESX-ADJ/NOPB from Texas Instruments is an adjustable ultra-low-dropout linear regulator (LDO) designed for high-current, low-voltage microprocessor and DSP power supplies. It delivers up to 1.5 A DC output current with dropout as low as 38 mV at 150 mA and 380 mV at full load, operates from 2.5 V to 7 V input, and features 10 nA shutdown quiescent current - enabling battery-powered always-on systems.
For engineers reviewing the LP3875ESX-ADJ/NOPB datasheet, LP3875ESX-ADJ/NOPB pinout, LP3875ESX-ADJ/NOPB application, or LP3875ESX-ADJ/NOPB equivalent, key selection criteria include its CMOS-based ultra-low dropout architecture, adjustable output via external resistors R1/R2, thermal shutdown and short-circuit protection, and compatibility with low-ESR tantalum or ceramic output capacitors.
Technical Context
The LP3875ESX-ADJ/NOPB uses a PMOS pass element on a CMOS process, enabling load-independent quiescent current and stable operation under ultra-low VIN–VOUT differentials. Its internal reference voltage is 1.216 V (±1.5% over temperature), and output voltage is set externally via ADJ pin feedback with R1/R2.
It integrates fast transient response circuitry optimized for step-load changes typical in microprocessor core rails, supports feed-forward compensation (CFF), and includes reverse-current protection via the intrinsic body diode - rated for 200 mA continuous and 1 A peak reverse conduction when VOUT > VIN.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | 1.5 A DC maximum - supports high-current digital loads without derating at TJ ≤ 125°C with proper heatsinking. |
| Dropout Voltage | 38 mV @ 150 mA / 380 mV @ 1.5 A - enables regulation from near-VOUT input, critical for battery end-of-life operation. |
| Input Voltage Range | 2.5 V to 7 V - compatible with single-cell Li-ion (2.7–4.2 V), 3.3 V/5 V rails, and post-regulation from switching converters. |
| Shutdown Quiescent Current | 10 nA typical - reduces standby battery drain in always-on IoT and portable applications. |
| Ground Pin Current | 6 mA @ 1.5 A load - low bias current improves efficiency vs. bipolar LDOs and simplifies thermal design. |
| Output Noise | 150 µVRMS (10 Hz–100 kHz) - suitable for noise-sensitive analog supply domains like ADC references or RF bias rails. |
| Thermal Resistance (RθJA) | 65.2°C/W (SOT-223) - requires ≥1.5 cm² copper pour for 1.5 A continuous operation at TA = 70°C. |
Pinout & Package
LP3875ESX-ADJ/NOPB is packaged in a 5-pin SOT-223 (NDC) with exposed thermal pad electrically connected to GND. The package measures 6.50 mm × 3.56 mm and supports surface-mount reflow assembly.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (SD) | Shutdown control input | CMOS-compatible logic input; <0.3 V disables regulator and reduces IQ to 10 nA; requires 10-kΩ pullup if driven open-drain. |
| 2 (IN) | Power input | Accepts 2.5–7 V supply; must be bypassed with ≥10 µF capacitor close to pin to suppress ripple and ensure stability. |
| 3 (OUT) | Regulated output | Delivers adjustable voltage (≥1.216 V) up to 1.5 A; connects directly to load and output capacitor (min. 10 µF, ESR 100 mΩ–4 Ω). |
| 4 (ADJ) | Feedback reference node | Senses 1.216 V reference; forms resistor divider with R1/R2 to set VOUT = 1.216 × (1 + R1/R2); bias current ≤100 nA over temp. |
| 5 (GND) | Power and signal ground | Common return for IN, OUT, ADJ, and SD; thermal pad tied to PCB ground plane for heat dissipation and noise reduction. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low dropout | 38 mV @ 150 mA enables >95% efficiency at 1.8 V output from 2.0 V input - extends battery runtime in portable systems. |
| Adjustable output | VOUT programmable from 1.216 V to 6.5 V using two external resistors - eliminates need for multiple fixed-output variants. |
| Fast transient response | Sub-25 µs turnon delay and rapid load-step recovery - maintains tight regulation during CPU burst-mode operation. |
| Integrated protection | Thermal shutdown, current limiting (3.2 A short-circuit), and reverse-current blocking - eliminates need for external safety components. |
| Low-noise operation | 150 µVRMS broadband noise and 0.8 µV/√Hz spot noise at 120 Hz - meets requirements for mixed-signal SoC power domains. |
Applications
| Microprocessor Core Supply | GTL/GTL+ Bus Termination |
|---|---|
|
Use Scenario: Powering ARM Cortex-A series or RISC-V SoCs requiring tightly regulated 1.2–1.8 V core voltage with fast load transients. IC Role / Device Role / Timing Role: Primary LDO delivering 1.5 A DC with sub-50 mV dropout and <25 µs response to 1-A load steps. Use Value: Maintains stable core voltage during CPU frequency scaling, preventing timing violations and system resets. |
Use Scenario: Providing termination voltage for high-speed parallel buses (e.g., GTL+ in legacy server memory controllers). IC Role / Device Role / Timing Role: Adjustable 1.2–1.5 V rail with low output impedance and minimal noise coupling into data lines. Use Value: Reduces bus signal reflections and jitter by delivering clean, stable termination voltage independent of I/O supply rails. |
| DSP Power Supply | Battery Charger Bias Rail |
|
Use Scenario: Supplying TI C6000 or Analog Devices SHARC DSPs with sensitive analog sections requiring low-noise 3.3 V or adjustable bias. IC Role / Device Role / Timing Role: Low-noise, high-PSRR LDO generating clean analog supply from noisy system 5 V rail. Use Value: Enables 16-bit+ ADC performance by suppressing switching noise from upstream DC/DC converters. |
Use Scenario: Generating precise 2.8–4.2 V bias for lithium-ion charger ICs (e.g., BQ24xxx) in portable medical devices. IC Role / Device Role / Timing Role: Adjustable, thermally robust LDO providing stable reference voltage to charger control loop. Use Value: Ensures accurate charge voltage regulation across temperature and battery SOC, extending cell lifetime. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar adjustable LDO applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS7A4700RGWR | Lower IQ (1 µA active), lower noise (4.7 µVRMS), but 1-A max output and higher dropout (110 mV @ 1 A). | Better for ultra-low-power sensor nodes; insufficient for 1.5-A microprocessor cores. | Select when noise and quiescent current dominate over output current capability. |
| MCP1826T-ADJ/DC | Same 1.5-A rating and SOT-223 package, but higher dropout (200 mV @ 1.5 A) and no shutdown pin. | Lacks enable/shutdown control - unsuitable for systems requiring dynamic power gating. | Select only when shutdown functionality is not required and higher dropout is acceptable. |
Compared with TPS7A4700RGWR and MCP1826T-ADJ/DC, LP3875ESX-ADJ/NOPB uniquely balances 1.5-A output, ultra-low dropout (<400 mV), integrated shutdown, and SOT-223 thermal performance - making it optimal for space-constrained, high-current, battery-aware designs where both efficiency and controllability matter.
Availability
LP3875ESX-ADJ/NOPB is available at Aetrix Electronics and suitable for microprocessor core supplies, GTL bus terminators, DSP analog rails, battery charger bias circuits, and industrial embedded controllers requiring stable component supply with long-term manufacturability.
Supply support for LP3875ESX-ADJ/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, embedded processing, and power management technologies, with decades of LDO design expertise and broad automotive/industrial qualification.
The LP3875ESX-ADJ/NOPB belongs to TI's ultra-low-dropout linear regulator family targeting high-efficiency, low-noise power delivery for portable computing, communications infrastructure, and precision analog systems.
FAQ
What is the minimum input voltage required for LP3875ESX-ADJ/NOPB to regulate a 1.8-V output?
The minimum input voltage is determined by dropout: VIN(MIN) = VOUT + VDROPOUT. For LP3875ESX-ADJ/NOPB at 1.5 A, VDROPOUT = 380 mV (typical), so VIN(MIN) = 1.8 V + 0.38 V = 2.18 V. However, the absolute minimum specified VIN is 2.5 V per datasheet - thus 2.5 V is the guaranteed operational floor for LP3875ESX-ADJ/NOPB regardless of load.
Can LP3875ESX-ADJ/NOPB be used without the feed-forward capacitor (CFF)?
No - CFF is required for stability across the full 10 µF–100 µF output capacitance range. Omitting CFF risks oscillation, especially with low-ESR ceramic capacitors. The value depends on R1: CFF ≈ 1/(2π × R1 × 45 kHz). For example, with R1 = 100 kΩ, CFF = 35 pF (X7R ceramic). LP3875ESX-ADJ/NOPB's loop compensation relies on this zero placement.
Does LP3875ESX-ADJ/NOPB support reverse current protection?
Yes - LP3875ESX-ADJ/NOPB contains an intrinsic body diode between IN and OUT. When VOUT exceeds VIN, this diode conducts. The device is rated for 200 mA continuous and 1 A peak reverse current. To avoid damage, external current limiting or diode OR-ing is recommended if reverse conduction exceeds these limits.
What is the maximum allowable junction temperature for continuous operation of LP3875ESX-ADJ/NOPB?
The absolute maximum junction temperature for LP3875ESX-ADJ/NOPB is +125°C. Operation above this triggers thermal shutdown. For reliable 1.5-A continuous output in SOT-223, ambient temperature must be limited to ~70°C with ≥1.5 cm² 2-oz copper thermal pad, based on RθJA = 65.2°C/W. Derating curves in the datasheet define safe operating area vs. load and ambient.
How does the ADJ pin bias current affect output voltage accuracy in LP3875ESX-ADJ/NOPB?
LP3875ESX-ADJ/NOPB ADJ pin bias current is ≤100 nA over temperature. With typical R1/R2 values (e.g., R2 = 10 kΩ, R1 = 10 kΩ for 2.43 V), this introduces <0.1% error. However, if R1 > 100 kΩ, the error becomes significant - e.g., R1 = 1 MΩ adds ~1% offset. Always use ≤1% tolerance resistors and keep R1 ≤ 100 kΩ to maintain LP3875ESX-ADJ/NOPB's ±1.5% reference accuracy.
LP3875ESX-ADJ/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- TO-263-6, D2PAK (5 Leads + Tab), TO-263BA
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Output Configuration:
- Positive
- Output Type:
- Adjustable
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 7V
- Voltage - Output (Min/Fixed):
- 1.22V
- Voltage - Output (Max):
- 6.4V
- Voltage Dropout (Max):
- 0.55V @ 1.5A
- Current - Output:
- 1.5A
- Current - Quiescent (Iq):
- 5 mA
- Current - Supply (Max):
- 15 mA
- PSRR:
- 73dB ~ 57dB (120Hz)
- Control Features:
- Enable
- Protection Features:
- Over Current, Over Temperature, Short Circuit
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TO-263 (DDPAK-5)
LP3875ESX-ADJ/NOPB FAQ
1.How can I place an order for LP3875ESX-ADJ/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LP3875ESX-ADJ/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 LP3875ESX-ADJ/NOPB reliable?
The price and inventory of LP3875ESX-ADJ/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LP3875ESX-ADJ/NOPB is usually 5 days.
3.What payment methods are accepted for LP3875ESX-ADJ/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LP3875ESX-ADJ/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LP3875ESX-ADJ/NOPB?
LP3875ESX-ADJ/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LP3875ESX-ADJ/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 LP3875ESX-ADJ/NOPB?
For technical support, including LP3875ESX-ADJ/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LP3875ESX-ADJ/NOPB requirements.
6.How does Aetrix verify that LP3875ESX-ADJ/NOPB is sourced from the original manufacturer or authorized distributors?
All LP3875ESX-ADJ/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 LP3875ESX-ADJ/NOPB meets industry standards.
7.What is the process for return or replacement of LP3875ESX-ADJ/NOPB?
All LP3875ESX-ADJ/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LP3875ESX-ADJ/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 LP3875ESX-ADJ/NOPB part is unused and in its original packaging.
Return procedure for LP3875ESX-ADJ/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LP3875ESX-ADJ/NOPB Tags
-
MIC5504-1.8YM5-TR
Microchip Technology
-
MIC5504-3.3YM5-TR
Microchip Technology
-
MIC5365-3.0YC5-TR
Microchip Technology
-
MIC5365-1.8YC5-TR
Microchip Technology
-
MIC5365-2.5YC5-TR
Microchip Technology
-
MIC5365-3.3YC5-TR
Microchip Technology
-
MIC5365-3.3YD5-TR
Microchip Technology
-
MIC5317-3.3YM5-TR
Microchip Technology
-
TLV1117LV33DCYR
Texas Instruments
-
MIC5317-3.3YMT-TZ
Microchip Technology
-
MIC5528-3.3YMT-TR
Microchip Technology
-
TLV75801PDRVR
Texas Instruments
Tech Hub
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
LDO regulator guide covering low dropout voltage, power dissipation, thermal design, PSRR, output noise, capacitor stability, adjustable LDO circuits, LDO vs buck converter and datasheet selection chec…
Conditional Access Module guide covering CAM meaning, CI/CI+ interface, smart card authorization, DVB security workflow, TV and set-top box compatibility, internal electronics, ESD protection, connecto…
Guide to electronic component obsolescence covering EOL risk, PCN/PDN notices, last-time buy planning, replacement options, form-fit-function validation, counterfeit risk and BOM lifecycle management.
18650 battery guide covering lithium-ion cell basics, 3.6V/3.7V voltage, 4.2V charging, mAh and Wh capacity, protected cells, chargers, BMS, series-parallel packs, holders, welding and sourcing checks.…
