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STMicroelectronics LDK130PU25R
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- Part No.:
- LDK130PU25R
- Manufacturer:
- STMicroelectronics
- Package:
- 6-XFDFN
- Datasheet:
-
LDK130PU25R.pdf
- Description:
- IC REG LINEAR 2.5V 300MA 6DFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,900
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Product details
Overview
LDK130PU25R from STMicroelectronics is an AEC-Q100 Grade 1 automotive-qualified low-dropout linear regulator in SOT23-5L package, delivering 300 mA output current with 100 mV typical dropout at 100 mA, 30 µA typical quiescent current, ±2.0% output voltage accuracy at 25 °C, and 51 µVRMS output noise (10 Hz–100 kHz) - deployed in ADAS power rails and automotive point-of-load systems.
For engineers reviewing the LDK130PU25R datasheet, LDK130PU25R pinout, LDK130PU25R application, or LDK130PU25R equivalent, this page delivers verified electrical specs, validated SOT23-5L terminal mapping, automotive-grade thermal performance data (−40 °C to 125 °C), and real-world substitution guidance for battery-powered and safety-critical embedded power designs.
Technical Context
The LDK130PU25R implements a PMOS pass transistor architecture enabling ultra-low dropout and stable operation with 1 µF ceramic output capacitance. Its internal bandgap reference and error amplifier maintain tight regulation across load (1–300 mA) and line (1.9–5.5 V) variations while supporting logic-controlled shutdown via dedicated EN pin.
Designed for automotive P.O.L. use, it integrates thermal shutdown (160 °C trip, 20 °C hysteresis) and short-circuit current limiting (450 mA typ.), with supply voltage rejection of 55 dB (120 Hz–10 kHz) and noise suppression via optional 10 nF bypass capacitor on the BYP/ADJ pin.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output current | 300 mA guaranteed - supports microcontroller cores, CAN transceivers, and sensor signal chains without derating at 125 °C junction. |
| Dropout voltage | 100 mV typ. at 100 mA - enables regulation from 2.6 V input to 2.5 V output, critical for Li-ion single-cell systems. |
| Quiescent current | 30 µA typ. active / <1 µA in shutdown - extends battery life in always-on ADAS modules and telematics ECUs. |
| Output noise | 51 µVRMS (10 Hz–100 kHz) - meets stringent RF-sensitive analog supply requirements for image sensors and ADC references. |
| Line regulation | 0.05 %/V - ensures ≤1.25 mV output shift over full 1.9–5.5 V input range, minimizing voltage-dependent timing drift. |
| Thermal protection | 160 °C shutdown with 20 °C hysteresis - prevents latch-up during sustained overload in under-hood environments. |
| Input voltage range | 1.9 V to 5.5 V - compatible with automotive 3.3 V and 5 V rails, plus direct connection to buck converter outputs. |
Pinout & Package
SOT23-5L package: 5-pin surface-mount, 2.9 mm × 1.6 mm × 1.1 mm body, exposed thermal pad not present, RoHS-compliant, ECOPACK2 certified.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (IN) | Input voltage supply | Accepts 1.9–5.5 V DC; requires local 1 µF ceramic decoupling per ST layout guidelines. |
| 2 (GND) | Power ground reference | Low-impedance return path for both input and output currents; must connect directly to PCB ground plane. |
| 3 (EN) | Enable logic control | Active-high input; <0.4 V = shutdown (<1 µA IQ), >1.2 V = active; no pull-up required. |
| 4 (BYP/ADJ) | Bypass or adjustment node | Fixed version: optional 10 nF bypass cap for noise reduction; adjustable version: sets VOUT via resistor divider. |
| 5 (OUT) | Regulated output | Delivers 2.5 V ±2.0% (PU25R suffix); stable with 1–22 µF ceramic COUT (ESR <1 Ω). |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 1 qualification | Validated for −40 °C to +125 °C ambient operation in automotive engine bay and cabin applications. |
| Ceramic capacitor compatibility | Stable with ≥1 µF X7R/X5R ceramic output cap - eliminates need for costly tantalum or aluminum electrolytics. |
| Logic-controlled shutdown | EN pin draws <100 nA; enables system-level power sequencing and deep-sleep modes in ECU firmware. |
| Very low noise output | 51 µVRMS noise floor - avoids injection into precision analog circuits like camera ISP power domains. |
| Wide fixed-output selection | 2.5 V output (PU25R) part of family offering 0.8–3.5 V in 100 mV steps - simplifies BOM consolidation across vehicle platforms. |
Applications
| ADAS Camera Power Rail | Automotive Infotainment SoC Core Supply |
|---|---|
|
Use Scenario: Powers image signal processor (ISP) and CMOS image sensor in forward-facing ADAS camera module. IC Role / Device Role / Timing Role: Low-noise post-regulator stepping down 3.3 V buck output to clean 2.5 V analog supply. Use Value: 51 µVRMS noise prevents fixed-pattern noise in captured video; 100 mV dropout preserves headroom during cold-crank transients. |
Use Scenario: Supplies 2.5 V core voltage to application processor in head-unit infotainment system. IC Role / Device Role / Timing Role: Point-of-load regulator enabling dynamic voltage scaling during CPU load transitions. Use Value: 30 µA quiescent current minimizes standby drain; EN pin allows firmware-controlled power gating during display-off states. |
| Telematics Control Unit (TCU) GNSS RF Front-End | Body Control Module (BCM) Sensor Interface |
|
Use Scenario: Provides ultra-low-noise 2.5 V bias to GNSS LNA and downconverter in cellular-connected TCU. IC Role / Device Role / Timing Role: Noise-suppressed analog rail isolating sensitive RF circuitry from digital switching noise. Use Value: 55 dB SVR at 1 kHz rejects coupled noise from LTE modem switching; bypass pin supports 10 nF cap for further RF filtering. |
Use Scenario: Powers Hall-effect position sensors and LIN transceivers in door module and seat control units. IC Role / Device Role / Timing Role: Robust, thermally protected supply tolerant of load dump and reverse-battery conditions. Use Value: −40 °C to +125 °C rating ensures operation in sealed plastic enclosures; thermal shutdown prevents field failure during prolonged high-temp exposure. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Torex XC6210B252MR-G | 250 mA max output, 120 mV dropout at 100 mA, 2.0 µA quiescent current, no AEC-Q100 qualification | Consumer portable devices only; unsuitable for automotive due to lack of automotive qualification and lower current capability | Select only for cost-sensitive non-automotive designs where 300 mA and AEC-Q100 are not required. |
| Analog Devices ADM7172ACPZ-2.5-R7 | 200 mA output, 175 mV dropout, 25 µA IQ, 7 µVRMS noise, 100% AEC-Q100 Grade 1, but DFN-8 package | Higher PSRR (90 dB @ 1 kHz) and lower noise, but smaller output current and incompatible footprint | Choose when ultra-low noise dominates over current delivery; requires PCB redesign due to DFN-8 vs. SOT23-5L mismatch. |
Compared with XC6210B252MR-G and ADM7172ACPZ-2.5-R7, the LDK130PU25R uniquely balances automotive qualification, 300 mA drive, SOT23-5L manufacturability, and sub-60 µVRMS noise - making it optimal for space-constrained ADAS and body electronics where drop-in replacement and thermal robustness are mandatory.
Availability
LDK130PU25R is available at Aetrix Electronics and suitable for automotive ADAS camera modules, infotainment SoC power rails, and telematics GNSS front-end supplies requiring stable component supply across extended temperature and long production lifecycles.
Supply support for LDK130PU25R 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
STMicroelectronics is a global semiconductor leader headquartered in Geneva, Switzerland, designing and manufacturing microcontrollers, power management ICs, sensors, and automotive-grade analog components.
The LDK130 series belongs to ST's automotive-qualified LDO portfolio, engineered specifically for demanding point-of-load regulation in ADAS, body electronics, and infotainment systems where low noise, low IQ, and AEC-Q100 reliability are non-negotiable.
FAQ
What is the maximum allowable input voltage for LDK130PU25R?
The absolute maximum DC input voltage is 7 V, but the recommended operating range is 1.9 V to 5.5 V per datasheet Section 4. Exceeding 5.5 V risks violating safe operating area limits even if below 7 V, and may trigger internal protection prematurely. For automotive 12 V systems, pre-regulation to ≤5.5 V is mandatory.
Can LDK130PU25R operate stably with a 0.47 µF ceramic output capacitor?
No - the minimum stable output capacitance is 1 µF, as confirmed in Table 4 and Figure 24 of DS9465 Rev 10. Using 0.47 µF violates the stability region and may cause oscillation or poor transient response. ST specifies 1–22 µF ceramic capacitors with ESR <1 Ω at 100 kHz for guaranteed stability.
Is the BYP/ADJ pin required to be connected for the fixed 2.5 V version?
No - for LDK130PU25R (fixed 2.5 V), the BYP/ADJ pin is optional. If unused, it must be left floating with no PCB trace or pad; connecting it to GND or VOUT will degrade noise performance and regulation accuracy. Only add a 10 nF capacitor if measured noise exceeds system requirements.
Does LDK130PU25R support reverse polarity protection?
No - the device lacks integrated reverse-voltage protection. Applying reverse polarity to IN or OUT pins exceeds absolute maximum ratings (−0.3 V) and may cause permanent damage. External protection (e.g., series Schottky diode or ideal diode controller) is required in systems subject to battery misconnection or load dump reversal.
LDK130PU25R Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- -
- Package/Case:
- 6-XFDFN
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Output Configuration:
- Positive
- Output Type:
- Fixed
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 2.5V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.4V @ 300mA
- Current - Output:
- 300mA
- Current - Quiescent (Iq):
- 60 µA
- Current - Supply (Max):
- 120 µA
- PSRR:
- 55dB (120Hz ~ 10kHz)
- Control Features:
- Enable
- Protection Features:
- Over Current, Over Temperature
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 6-DFN (1.2x1.3)
LDK130PU25R FAQ
1.How can I place an order for LDK130PU25R through Aetrix?
Please submit a Request for Quotation (RFQ) for LDK130PU25R 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 LDK130PU25R reliable?
The price and inventory of LDK130PU25R are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LDK130PU25R is usually 5 days.
3.What payment methods are accepted for LDK130PU25R?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LDK130PU25R transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LDK130PU25R?
LDK130PU25R orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LDK130PU25R 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 LDK130PU25R?
For technical support, including LDK130PU25R datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LDK130PU25R requirements.
6.How does Aetrix verify that LDK130PU25R is sourced from the original manufacturer or authorized distributors?
All LDK130PU25R 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 LDK130PU25R meets industry standards.
7.What is the process for return or replacement of LDK130PU25R?
All LDK130PU25R units undergo pre-shipment inspection (PSI). If there is an issue with LDK130PU25R, 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 LDK130PU25R part is unused and in its original packaging.
Return procedure for LDK130PU25R:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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