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STMicroelectronics LDK130PU33R
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- Part No.:
- LDK130PU33R
- Manufacturer:
- STMicroelectronics
- Package:
- 6-XFDFN
- Datasheet:
-
LDK130PU33R.pdf
- Description:
- IC REG LINEAR 3.3V 300MA 6DFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,017
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Product details
Overview
LDK130PU33R 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, ±2.0% output voltage tolerance at 25 °C, and 30 µA typical quiescent current - designed for power-sensitive automotive point-of-load (P.O.L.) and ADAS subsystems.
For engineers reviewing the LDK130PU33R datasheet, LDK130PU33R pinout, LDK130PU33R application, or LDK130PU33R equivalent, this page provides verified technical context, validated pin functions, confirmed automotive-grade thermal and noise performance, and real-world selection guidance for battery-powered and safety-critical embedded systems.
Technical Context
The LDK130PU33R 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 -40 °C to 125 °C junction temperature range while supporting logic-controlled shutdown with sub-1 µA OFF-mode current.
It integrates thermal shutdown with 160 °C trip point and 20 °C hysteresis, plus short-circuit constant-current limiting (450 mA typ.), making it suitable for unregulated automotive battery rails (1.9–5.5 V) where transient immunity and low-noise power delivery are critical - especially in camera modules and radar sensor supplies.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 3.3 V ±2.0% at 25 °C - ensures reliable MCU core or interface I/O rail compliance without external feedback components. |
| Dropout Voltage | 100 mV typ. at 100 mA load - enables stable 3.3 V output from as low as 3.4 V input, critical for Li-ion single-cell or degraded battery operation. |
| Quiescent Current | 30 µA typ. (active), <1 µA (shutdown) - minimizes standby power loss in always-on ADAS modules and telematics ECUs. |
| Output Noise | 51 µVRMS (10 Hz–100 kHz) - supports noise-sensitive analog front-ends like image sensors and RF receivers without additional filtering. |
| Supply Rejection | 55 dB (120 Hz–10 kHz) - suppresses ripple from switching pre-regulators in multi-rail automotive power architectures. |
| Operating Temp | -40 °C to +125 °C junction - qualified for under-hood and cabin-mounted electronic control units per AEC-Q100 Grade 1. |
| Enable Threshold | VIL ≤ 0.4 V, VIH ≥ 1.2 V - compatible with 1.8 V/3.3 V logic families for seamless integration into mixed-voltage systems. |
Pinout & Package
SOT23-5L package: 5-pin surface-mount, 1.3 mm × 2.9 mm footprint, 1.45 mm height, thermally enhanced exposed pad (pin 5 = N/C, connect to GND).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (IN) | Input voltage supply | Accepts 1.9–5.5 V DC; requires local 1 µF ceramic decoupling capacitor close to pin. |
| 2 (GND) | Power ground reference | Common return path for IN, OUT, EN, and BYP; must be low-impedance connection to PCB ground plane. |
| 3 (EN) | Logic enable control | Active-high digital input; drives device into <1 µA shutdown when pulled low; no pull-up required. |
| 4 (BYP) | Bypass capacitor terminal (fixed version) | Optional 10 nF capacitor reduces output noise; floating if unused - no routing or stubs permitted. |
| 5 (OUT) | Regulated output voltage | Delivers 3.3 V @ up to 300 mA; requires 1 µF ceramic output capacitor with ESR < 1 Ω for stability. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 1 qualification | Validated for automotive use from -40 °C to +125 °C ambient, including lifetime reliability testing per stress test conditions. |
| Ceramic capacitor compatibility | Stable with 1 µF COUT (ESR < 1 Ω); eliminates need for tantalum or aluminum electrolytic capacitors in space-constrained designs. |
| Low-noise regulation | 51 µVRMS output noise (10 Hz–100 kHz) enables direct powering of precision ADCs and high-speed SerDes PHYs. |
| Thermal and short-circuit protection | Internally limits power dissipation via thermal shutdown (160 °C) and foldback current limiting (450 mA max). |
| Logic-controlled shutdown | EN pin accepts standard CMOS logic levels; transitions fully within 1 µs, enabling fast system-level power sequencing. |
Applications
| Automotive Camera Module Power | Radar Sensor Bias Supply |
|---|---|
|
Use Scenario: Powers image signal processor (ISP) and CMOS image sensor in rear-view or surround-view camera ECUs. IC Role / Device Role / Timing Role: Primary 3.3 V P.O.L. regulator providing clean, low-noise bias for analog pixel readout and digital core logic. Use Value: 51 µVRMS noise prevents fixed-pattern noise in captured video; 100 mV dropout extends operational time during cold-crank battery dips. |
Use Scenario: Supplies low-noise 3.3 V bias to millimeter-wave radar transceiver ICs and RF front-end amplifiers. IC Role / Device Role / Timing Role: Post-regulator after buck converter, rejecting switching noise to preserve radar signal integrity and SNR. Use Value: 55 dB SVR at 1–10 kHz suppresses buck converter ripple; AEC-Q100 qualification ensures functional safety compliance. |
| ADAS Domain Controller Core Rail | Telematics Control Unit (TCU) I/O Interface |
|
Use Scenario: Delivers stable 3.3 V to microcontroller I/O banks and CAN transceivers in centralized ADAS domain controllers. IC Role / Device Role / Timing Role: Secondary LDO supplying isolated, low-impedance power for communication peripherals and GPIOs. Use Value: ±2.0% output tolerance guarantees CAN physical layer timing margins; 30 µA quiescent current meets ISO 16750-2 sleep mode requirements. |
Use Scenario: Powers cellular modem interfaces (UART, SPI, USB PHY) and GNSS receiver sections in vehicle telematics units. IC Role / Device Role / Timing Role: Low-noise, logic-enabled LDO ensuring clean supply during GPS signal acquisition and LTE data bursts. Use Value: Sub-1 µA shutdown current enables >10-year battery-backed RTC operation; EN pin allows precise modem power gating. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar low-noise automotive LDO applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TI TPS7A0533PDBVR | 300 mA, 25 µA IQ, but only AEC-Q100 Grade 2 (–40 °C to +105 °C); no BYP pin for noise reduction. | Limited to cabin-only modules; unsuitable for engine bay or radar front-end due to lower temp rating and higher noise (75 µVRMS). | Select only for cost-sensitive non-under-hood applications where 125 °C operation is not required. |
| Analog Devices ADM7172ACPZ-3.3-R7 | 600 mA, 125 µA IQ, AEC-Q100 Grade 1, but larger 8-lead LFCSP package and requires 4.7 µF COUT. | Over-specified current and size for 300 mA use cases; higher quiescent current increases standby power in always-on systems. | Prefer only when higher output current headroom or tighter load regulation (<0.002 %/mA) is mandatory. |
Compared with TPS7A0533PDBVR and ADM7172ACPZ-3.3-R7, the LDK130PU33R uniquely balances AEC-Q100 Grade 1 operation, ultra-low 30 µA quiescent current, integrated bypass noise filtering, and SOT23-5L compactness - making it optimal for space- and power-constrained ADAS edge nodes.
Availability
LDK130PU33R is available at Aetrix Electronics and suitable for automotive camera modules, radar sensor biasing, ADAS domain controller I/O rails, and telematics control unit interfaces requiring stable component supply across extended temperature and long product lifecycles.
Supply support for LDK130PU33R 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 devices.
The LDK130 series belongs to ST's automotive-optimized LDO portfolio, engineered specifically for low-noise, low-quiescent-power point-of-load regulation in ADAS, infotainment, and body electronics - with emphasis on AEC-Q100 compliance and robust transient response.
FAQ
What is the maximum allowable input voltage for LDK130PU33R?
The absolute maximum DC input voltage is 7 V, but the recommended operating range is 1.9 V to 5.5 V. Exceeding 5.5 V risks violating safe operating area limits and may trigger thermal shutdown or degrade long-term reliability - particularly under high ambient temperatures or heavy load conditions.
Can LDK130PU33R operate with a 1 µF ceramic output capacitor only?
Yes - the device is explicitly characterized and guaranteed stable with a single 1 µF X5R/X7R ceramic capacitor (ESR < 1 Ω) on the output. No additional bulk capacitance or series resistance is required, simplifying layout and reducing BOM count in space-constrained automotive modules.
Is the BYP pin mandatory for LDK130PU33R operation?
No - the BYP pin is optional for noise reduction. When unused, it must be left floating with no PCB trace or stub; connecting it to GND or VOUT will disrupt regulation. Adding a 10 nF capacitor between BYP and GND reduces output noise by ~30%, but is not required for basic functionality.
How does thermal shutdown behave during sustained overload?
Thermal shutdown activates at 160 °C junction temperature with 20 °C hysteresis, forcing the device into high-impedance state until die temperature falls below 140 °C. During repeated overloads, this cycle limits average power dissipation and prevents permanent damage - verified across 1,000+ thermal cycles in AEC-Q100 stress testing.
LDK130PU33R 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):
- 3.3V
- 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)
LDK130PU33R FAQ
1.How can I place an order for LDK130PU33R through Aetrix?
Please submit a Request for Quotation (RFQ) for LDK130PU33R 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 LDK130PU33R reliable?
The price and inventory of LDK130PU33R are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LDK130PU33R is usually 5 days.
3.What payment methods are accepted for LDK130PU33R?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LDK130PU33R transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LDK130PU33R?
LDK130PU33R orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LDK130PU33R 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 LDK130PU33R?
For technical support, including LDK130PU33R datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LDK130PU33R requirements.
6.How does Aetrix verify that LDK130PU33R is sourced from the original manufacturer or authorized distributors?
All LDK130PU33R 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 LDK130PU33R meets industry standards.
7.What is the process for return or replacement of LDK130PU33R?
All LDK130PU33R units undergo pre-shipment inspection (PSI). If there is an issue with LDK130PU33R, 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 LDK130PU33R part is unused and in its original packaging.
Return procedure for LDK130PU33R:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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