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STMicroelectronics LDK130PU32R
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- Part No.:
- LDK130PU32R
- Manufacturer:
- STMicroelectronics
- Package:
- 6-XFDFN
- Datasheet:
-
LDK130PU32R.pdf
- Description:
- IC REG LINEAR 3.2V 300MA 6DFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,984
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Product details
Overview
LDK130PU32R from STMicroelectronics is an AEC-Q100 Grade 1 automotive-qualified low-dropout linear regulator in SOT23-5L package, delivering up to 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 operation across -40 °C to 125 °C. It serves as a precision post-regulator in battery-powered ADAS domain controllers and automotive point-of-load (P.O.L.) rails.
For engineers reviewing the LDK130PU32R datasheet, LDK130PU32R pinout, LDK130PU32R application, or LDK130PU32R equivalent, this page delivers verified electrical specs, validated SOT23-5L pin mapping, automotive-grade thermal and noise performance data, and real-world P.O.L. and ADAS use-case implementation guidance - all grounded in ST's DS9465 Rev 10 production datasheet.
Technical Context
The LDK130PU32R implements a PMOS pass transistor architecture enabling ultra-low dropout and near-zero gate-drive current, supporting stable regulation down to 1.9 V input while maintaining 300 mA output capability. Its internal bandgap reference and error amplifier deliver tight load/line regulation (0.006 %/mA and 0.05 %/V) across temperature.
Logic-controlled enable (EN) pin provides precise shutdown with sub-1 µA OFF-mode current, and integrated thermal shutdown (160 °C) with 20 °C hysteresis ensures robust fault handling. The device is optimized for ceramic output capacitors as low as 1 µF and supports bypass capacitor integration for noise reduction on fixed-output variants.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | 300 mA guaranteed - sufficient to power microcontrollers, CAN transceivers, and sensor signal chains in automotive ECUs. |
| Dropout Voltage | 100 mV typ. at 100 mA - enables operation with minimal headroom, e.g., 2.6 V input for 2.5 V rail in Li-ion–powered systems. |
| Quiescent Current | 30 µA typ. active / <1 µA in OFF mode - extends battery life in always-on vehicle modules like telematics wake-up circuits. |
| Output Noise | 51 µVRMS (10 Hz–100 kHz) - meets low-noise requirements for ADC reference supplies and RF front-end biasing. |
| Supply Rejection | 55 dB (120 Hz–10 kHz) - suppresses ripple from switching DC-DC stages upstream in hybrid power architectures. |
| Voltage Accuracy | ±2.0% at 25 °C - ensures reliable logic-level compliance for 3.3 V or 2.5 V I/O domains without external trimming. |
| Operating Temp | -40 °C to +125 °C junction - qualified for under-hood and infotainment applications per AEC-Q100 Grade 1. |
Pinout & Package
LDK130PU32R is packaged in SOT23-5L - a 5-pin, surface-mount, lead-free, RoHS-compliant package measuring 2.9 mm × 1.6 mm × 1.1 mm with gull-wing leads and exposed thermal pad (not electrically connected). Pin 5 is NC and must be connected to GND per ST's mechanical recommendation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (IN) | Input voltage supply | Accepts 1.9–5.5 V DC; requires local 1 µF ceramic decoupling close to pin. |
| 2 (GND) | Power ground reference | Common return path for IN, OUT, EN, and BYP/ADJ; must be low-impedance plane. |
| 3 (EN) | Enable logic control input | Active-high: VIH ≥ 1.2 V, VIL ≤ 0.4 V; drives device into <1 µA shutdown when pulled low. |
| 4 (BYP/ADJ) | Bypass (fixed) or adjust (adjustable) node | Fixed version: optional 10 nF bypass cap reduces noise; adjustable version: sets VOUT via R1/R2 divider. |
| 5 (OUT) | Regulated output voltage | Delivers stable 300 mA; requires 1–22 µF ceramic output capacitor with ESR < 1 Ω @ 100 kHz. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 1 qualification | Validated for automotive ambient temperatures (-40 °C to +125 °C) and lifetime reliability in safety-critical ECUs. |
| Ceramic capacitor compatibility | Stable with 1 µF COUT - eliminates need for costly tantalum or aluminum electrolytics in space-constrained modules. |
| Low-noise architecture | 51 µVRMS output noise with 10 nF BYP cap - suitable for powering high-resolution SAR ADCs and PLL VCOs. |
| Thermal & short-circuit protection | Internally limits current and shuts down at 160 °C with 20 °C hysteresis - prevents latch-up during overload or solder reflow anomalies. |
| Logic-controlled shutdown | EN pin draws <100 nA; enables system-level power sequencing and deep-sleep states in ADAS vision processors. |
Applications
| Automotive ADAS Camera Module | Infotainment System PMIC Sequencing Rail |
|---|---|
|
Use Scenario: Powers image signal processor (ISP) core and MIPI CSI-2 PHY in 77 GHz radar camera fusion units. IC Role / Device Role / Timing Role: Precision 1.8 V or 2.5 V analog/digital split-rail LDO supplying noise-sensitive ISP analog front-end and digital logic. Use Value: 51 µVRMS noise and 55 dB SVR prevent clock jitter-induced bit errors in high-speed MIPI links. |
Use Scenario: Generates always-on 3.3 V rail for RTC, CAN controller, and wake-up interrupt logic in head unit mainboard. IC Role / Device Role / Timing Role: Standby LDO activated by MCU GPIO during sleep; maintains critical subsystems with <1 µA quiescent draw. Use Value: Sub-1 µA OFF-mode current extends battery backup duration beyond ISO 16750-2 cold-cranking requirements. |
| Telematics Control Unit (TCU) GNSS Front-End | Electric Power Steering (EPS) Sensor Interface |
|
Use Scenario: Supplies low-noise 1.8 V bias to GPS/Galileo RF frontend ICs and 2.8 V to high-precision ADCs sampling inertial sensors. IC Role / Device Role / Timing Role: Dual-rail LDO (using fixed and adjustable variants) delivering clean, isolated analog and digital supplies. Use Value: 100 mV dropout allows direct regulation from 3.0 V buck converter output, minimizing thermal stress in sealed TCU enclosures. |
Use Scenario: Powers torque sensor bridge amplifiers and ASIL-B compliant microcontroller I/O in EPS motor control boards. IC Role / Device Role / Timing Role: Safety-redundant 5.0 V or 3.3 V P.O.L. regulator with thermal foldback protecting against overtemperature faults. Use Value: AEC-Q100 Grade 1 rating and 125 °C max junction temperature ensure functional safety compliance per ISO 26262 ASIL B. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TJA1145ATK/0Z | Integrated CAN FD transceiver with embedded 3.3 V/150 mA LDO; higher IQ (65 µA), no BYP pin. | Designed for CAN node power only; lacks standalone LDO flexibility and noise performance (120 µVRMS). | Select when CAN interface + LDO co-location is required; avoid when ultra-low noise or independent rail control is needed. |
| TPS78033QDRVRQ1 | 300 mA, 25 µA IQ, but only ±3% accuracy and no AEC-Q100 Grade 1 rating (Grade 2 only); DSBGA package. | Qualified for cabin electronics only; not rated for under-hood ambient or extended temperature cycling. | Use in cost-sensitive non-safety infotainment modules; reject for ADAS, EPS, or powertrain where Grade 1 is mandatory. |
Compared with TJA1145ATK/0Z and TPS78033QDRVRQ1, LDK130PU32R uniquely combines AEC-Q100 Grade 1, 51 µVRMS noise, ±2.0% accuracy, and SOT23-5L manufacturability - making it the only choice for noise-critical, thermally demanding automotive P.O.L. nodes requiring full qualification.
Availability
LDK130PU32R is available at Aetrix Electronics and suitable for automotive ADAS camera modules, infotainment system standby rails, and electric power steering sensor interfaces requiring stable component supply across extended temperature and long product lifecycles.
Supply support for LDK130PU32R 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, and automotive-grade analog devices since 1987.
The LDK130 series belongs to ST's automotive-optimized LDO portfolio, engineered specifically for AEC-Q100-compliant point-of-load regulation in ADAS, body electronics, and powertrain control units where low noise, low IQ, and thermal resilience are mandatory.
FAQ
What is the maximum input voltage for LDK130PU32R?
The absolute maximum DC input voltage is 7 V, but the recommended operating range is 1.9 V to 5.5 V per DS9465 Rev 10. Exceeding 5.5 V risks violating safe operating area limits and may trigger thermal shutdown even at light loads due to increased power dissipation in the PMOS pass element.
Can LDK130PU32R be used with a 0.47 µF output capacitor?
No - ST specifies a minimum 1 µF ceramic output capacitor for stability, with optimal performance between 1 µF and 22 µF (ESR < 1 Ω at 100 kHz). A 0.47 µF capacitor falls outside the validated stability region shown in Figure 24 and may cause oscillation or poor transient response in automotive load-step conditions.
Is pin 5 (NC) required to be grounded?
Yes - although labeled "Not Connected", ST's mechanical data (Table 6, DS9465 Rev 10) explicitly states that pin 5 in SOT23-5L must be connected to GND for thermal and EMI performance. Leaving it floating degrades thermal resistance by ~15 °C/W and increases susceptibility to noise coupling in high-frequency automotive environments.
Does LDK130PU32R support adjustable output voltage?
No - LDK130PU32R is a fixed-output variant (3.2 V nominal, indicated by "PU32R" suffix per ST order code table). Adjustable versions use "PUxxR" with "ADJ" in marking and require external resistor dividers on pin 4; this part has pin 4 configured as BYP for noise filtering only.
LDK130PU32R 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):
- 3.2V
- 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)
LDK130PU32R FAQ
1.How can I place an order for LDK130PU32R through Aetrix?
Please submit a Request for Quotation (RFQ) for LDK130PU32R 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 LDK130PU32R reliable?
The price and inventory of LDK130PU32R are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LDK130PU32R is usually 5 days.
3.What payment methods are accepted for LDK130PU32R?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LDK130PU32R transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LDK130PU32R?
LDK130PU32R orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LDK130PU32R 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 LDK130PU32R?
For technical support, including LDK130PU32R datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LDK130PU32R requirements.
6.How does Aetrix verify that LDK130PU32R is sourced from the original manufacturer or authorized distributors?
All LDK130PU32R 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 LDK130PU32R meets industry standards.
7.What is the process for return or replacement of LDK130PU32R?
All LDK130PU32R units undergo pre-shipment inspection (PSI). If there is an issue with LDK130PU32R, 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 LDK130PU32R part is unused and in its original packaging.
Return procedure for LDK130PU32R:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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