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Texas Instruments LP3852ESX-1.8/NOPB
- Part No.:
- LP3852ESX-1.8/NOPB
- Manufacturer:
- Texas Instruments
- Package:
- TO-263-6, D2PAK (5 Leads + Tab), TO-263BA
- Datasheet:
-
LP3852ESX-1.8/NOPB.pdf
- Description:
- IC REG LINEAR 1.8V 1.5A DDPAK
- Quantity:
- Payment:
- Shipping:
Inventory:493
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Product details
Overview
LP3852ESX-1.8/NOPB from Texas Instruments is a fixed-output 1.8 V, 1.5 A ultra-low dropout linear regulator in SOT-223 package, featuring 24 mV dropout at 150 mA, ±1.5% output voltage accuracy at 25°C, and ERROR flag for output undervoltage detection - used in microprocessor core supplies and low-voltage bus terminators.
For engineers reviewing the LP3852ESX-1.8/NOPB datasheet, LP3852ESX-1.8/NOPB pinout, LP3852ESX-1.8/NOPB application, or LP3852ESX-1.8/NOPB equivalent, key selection criteria include dropout performance at light/heavy load, shutdown quiescent current (10 nA), ceramic capacitor stability support, thermal derating in SOT-223, and ERROR pin hysteresis behavior under temperature variation.
Technical Context
The LP3852ESX-1.8/NOPB uses a CMOS-based PMOS pass element enabling load-independent quiescent current (4 mA typical at 1.5 A) and ultra-low dropout (24 mV @ 150 mA, 260 mV @ 1.5 A in SOT-223). Its ERROR pin provides open-drain undervoltage flag with 5–16% hysteresis relative to VOUT and resets within 1 µs.
It operates from 2.5 V to 7 V input, requires ≥10 µF input/output capacitors (tantalum or ceramic), and supports stable regulation with ceramic outputs up to 150 µF when paired with 10 µF ceramic input - enabled by internal compensation optimized for low-ESR capacitors.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.8 V ±1.5% at 25°C; ±3% over −40°C to 125°C junction range |
| Max Output Current | 1.5 A DC continuous; peak current 1.8 A with VOUT ≥ VOUT(NOM) – 4% |
| Dropout Voltage | 260 mV at 1.5 A (SOT-223); enables operation with VIN as low as 2.06 V |
| Ground Pin Current | 3–9 mA at 1.5 A load; drops to 0.01–10 µA in shutdown mode |
| ERROR Threshold | Triggers at 10% VOUT drop (±5% hysteresis); open-drain output sinks 1 mA |
| PSRR | 73 dB at 120 Hz (VIN = VOUT + 1 V); critical for noise-sensitive digital loads |
| Thermal Resistance | RθJA = 65.2°C/W (SOT-223, 0.5 in² copper); limits max power dissipation without heatsink |
Pinout & Package
SOT-223 (NDC) package: 6.50 mm × 3.56 mm body, thermally enhanced tab (pin 2), 5-pin surface-mount configuration with exposed thermal pad.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - SD | Shutdown control input | CMOS-compatible; requires 10-kΩ pull-up to VIN; asserts shutdown below 0.3 V |
| 2 - IN | Input supply connection | Accepts 2.5–7 V; connects to input capacitor (≥10 µF) and bypass network |
| 3 - OUT | Regulated output terminal | Delivers 1.8 V/1.5 A; connects directly to output capacitor and load |
| 4 - ERROR | Open-drain fault indicator | Asserts low when VOUT falls >10% below nominal; must be pulled up externally |
| 5 - GND | Power ground reference | Low-impedance return path; ties to PCB ground plane and capacitor negatives |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low dropout | 24 mV @ 150 mA enables 1.8 V output from 2.0 V input sources like Li-ion cells |
| Ceramic capacitor compatible | Stable with ≥10 µF ceramic COUT; supports up to 150 µF ceramic if CIN = 10 µF |
| Fast transient response | Load step recovery in <2 µs (1 A step); preserves voltage margin in microprocessor bursts |
| Integrated protection | Thermal shutdown, short-circuit limiting (3.2 A peak), and reverse-current blocking via PMOS body diode |
| Low-noise operation | 150 µVrms output noise (BW = 10 Hz–100 kHz); suitable for analog/digital mixed-signal rails |
Applications
| Microprocessor Core Supply | GTL/GTL+ Bus Termination |
|---|---|
|
Use Scenario: Powering 1.8 V I/O domains of FPGA or ASIC with dynamic current draw up to 1.5 A. IC Role / Device Role / Timing Role: Primary low-noise, fast-response LDO delivering stable core voltage during logic state transitions. Use Value: 24 mV dropout preserves headroom from 2.0 V battery sources; 73 dB PSRR suppresses switching noise from adjacent DC/DC converters. |
Use Scenario: Providing precise 1.8 V termination voltage for GTL/GTL+ signaling on high-speed backplanes. IC Role / Device Role / Timing Role: Fixed-output regulator maintaining voltage accuracy within ±3% across temperature for signal integrity. Use Value: ±1.5% initial accuracy and 0.06% load regulation ensure consistent bus voltage margins; ERROR flag alerts on rail collapse before data corruption. |
| DSP Power Management | Battery-Powered Instrumentation |
|
Use Scenario: Supplying 1.8 V to low-power DSPs in portable test equipment with intermittent high-current bursts. IC Role / Device Role / Timing Role: High-efficiency linear regulator enabling clean power during ADC sampling and FFT computation cycles. Use Value: 10 nA shutdown current extends battery life in sleep mode; fast load transient response prevents brownout during wake-up. |
Use Scenario: Regulating 1.8 V rail for sensor interface ICs and microcontrollers in handheld medical devices. IC Role / Device Role / Timing Role: Ultra-low-noise, thermally robust LDO ensuring stable analog front-end bias under variable ambient conditions. Use Value: 150 µVrms output noise avoids interference with 24-bit sigma-delta ADCs; −40°C to 125°C operation supports clinical-grade reliability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar low-dropout linear regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPL7407LPGEDR | 1.8 V, 0.5 A; 120 mV dropout @ 500 mA; no ERROR pin; 1.8–5.5 V input range | Limited to sub-1 A loads; lacks fault reporting; lower thermal capability (RθJA = 120°C/W) | Choose for cost-sensitive, low-current applications where ERROR monitoring is unnecessary. |
| TPS7A2018PDQNR | 1.8 V, 300 mA; 170 mV dropout @ 300 mA; 65 dB PSRR; 0.8 µA IQ; WSON-6 package | Lower current rating; superior quiescent current but insufficient for 1.5 A loads | Use only where load current ≤300 mA and ultra-low IQ dominates design priority over output capability. |
Compared with LP3852ESX-1.8/NOPB, TPL7407LPGEDR offers smaller footprint and lower cost but sacrifices 1.0 A output capacity and fault visibility; TPS7A2018PDQNR delivers exceptional IQ and PSRR yet cannot meet the 1.5 A requirement - making LP3852ESX-1.8/NOPB the sole viable option for high-current, error-aware 1.8 V LDO applications in SOT-223.
Availability
LP3852ESX-1.8/NOPB is available at Aetrix Electronics and suitable for microprocessor core supplies, GTL bus terminators, and battery-powered instrumentation requiring stable component supply, long-term manufacturability, and TI-qualified automotive-grade reliability.
Supply support for LP3852ESX-1.8/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 company designing analog ICs, embedded processors, and system-on-chip solutions for industrial, automotive, and communications markets.
The LP3852ESX-1.8/NOPB belongs to TI's LP385x ultra-low dropout linear regulator family, engineered specifically for high-current, low-voltage digital systems where fast transient response, ceramic capacitor compatibility, and fault monitoring are essential.
FAQ
What is the minimum input voltage required for LP3852ESX-1.8/NOPB to regulate 1.8 V output?
The LP3852ESX-1.8/NOPB requires VIN ≥ VOUT(NOM) + VDROPOUT. At 1.5 A load, dropout is 260 mV, so minimum VIN is 2.06 V. At lighter loads (150 mA), dropout drops to 24 mV, allowing operation down to 1.824 V. The datasheet specifies absolute minimum VIN as 2.5 V for guaranteed functionality across all conditions - this accounts for line regulation, temperature drift, and tolerance stack-up.
Can LP3852ESX-1.8/NOPB use ceramic output capacitors, and what are the stability limits?
Yes, LP3852ESX-1.8/NOPB supports ceramic output capacitors. With a 10 µF ceramic input capacitor and 1.5 A load, stable operation is guaranteed for COUT between 10 µF and 150 µF. Exceeding 150 µF risks instability due to phase margin erosion. Total ceramic COUT includes all parallel ceramics on the output rail - e.g., 10 µF bulk + three 10 µF bypass caps = 40 µF, which remains within safe limits.
How does the ERROR pin on LP3852ESX-1.8/NOPB behave during thermal shutdown?
The ERROR pin on LP3852ESX-1.8/NOPB asserts low not only during input undervoltage or overcurrent but also during thermal shutdown - because all three conditions cause VOUT to fall >10% below nominal. Once thermal limit is cleared and VOUT recovers, the ERROR pin releases after 1 µs reset delay. Note: ERROR is disabled (high-impedance) when SD is pulled low, to minimize leakage in shutdown mode.
What is the recommended pull-up resistor value for the ERROR pin of LP3852ESX-1.8/NOPB?
Texas Instruments recommends a 10 kΩ to 1 MΩ pull-up resistor for the ERROR pin of LP3852ESX-1.8/NOPB. A 10 kΩ value ensures fast rise time (<100 ns) and strong noise immunity but draws ~180 µA from VIN when asserted low. For ultra-low-power designs, 100 kΩ is optimal - balancing response time (~1 µs), power loss (~18 µA), and EMI resilience. Never leave ERROR floating; tie to GND if unused.
Does LP3852ESX-1.8/NOPB require an input capacitor, and what type is preferred?
Yes, LP3852ESX-1.8/NOPB requires a minimum 10 µF input capacitor for stability and EMI suppression. Ceramic or tantalum types are approved; aluminum electrolytics are discouraged due to high ESR and temperature sensitivity. For best high-frequency noise rejection, use X5R/X7R ceramic with ≥10 µF total capacitance - split across multiple values (e.g., 4.7 µF + 4.7 µF + 1 µF) to broaden impedance profile across frequency bands.
LP3852ESX-1.8/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:
- Fixed
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 7V
- Voltage - Output (Min/Fixed):
- 1.8V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.38V @ 1.5A
- Current - Output:
- 1.5A
- Current - Quiescent (Iq):
- 3 mA
- Current - Supply (Max):
- 10 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)
LP3852ESX-1.8/NOPB FAQ
1.How can I place an order for LP3852ESX-1.8/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LP3852ESX-1.8/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 LP3852ESX-1.8/NOPB reliable?
The price and inventory of LP3852ESX-1.8/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LP3852ESX-1.8/NOPB is usually 5 days.
3.What payment methods are accepted for LP3852ESX-1.8/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LP3852ESX-1.8/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LP3852ESX-1.8/NOPB?
LP3852ESX-1.8/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LP3852ESX-1.8/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 LP3852ESX-1.8/NOPB?
For technical support, including LP3852ESX-1.8/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LP3852ESX-1.8/NOPB requirements.
6.How does Aetrix verify that LP3852ESX-1.8/NOPB is sourced from the original manufacturer or authorized distributors?
All LP3852ESX-1.8/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 LP3852ESX-1.8/NOPB meets industry standards.
7.What is the process for return or replacement of LP3852ESX-1.8/NOPB?
All LP3852ESX-1.8/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LP3852ESX-1.8/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 LP3852ESX-1.8/NOPB part is unused and in its original packaging.
Return procedure for LP3852ESX-1.8/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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