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Home > Products > Integrated Circuits (ICs) > Power Management (PMIC) > Voltage Regulators - Linear, Low Drop Out (LDO) Regulators

STMicroelectronics L5300GJTR

Name: L5300GJTR
Brand: STMicroelectronics
SKU: L5300GJTR
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: L5300GJTR

Manufacturer:: STMicroelectronics

Category:: Voltage Regulators - Linear, Low Drop Out (LDO) Regulators

Package:: PowerSSO-12

Datasheet:: L5300GJTR.pdf

Description:: IC REG LIN 5V 300MA POWERSSO-12

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Product details

Overview

L5300GJTR from STMicroelectronics is an AEC-Q100 qualified automotive 5 V low-dropout linear voltage regulator with integrated microprocessor supervisory functions - power-on reset, low-voltage reset, early warning, and enable control. It delivers up to 300 mA output current, maintains ±2% output accuracy over −40 °C to 150 °C junction temperature, and operates from 5.6 V to 40 V input supply. It is used in engine control units (ECUs), body control modules (BCMs), and ADAS domain controllers where stable 5 V rail and fault-aware power sequencing are required.

For engineers reviewing the L5300GJTR datasheet, L5300GJTR pinout, L5300GJTR application, or L5300GJTR equivalent, this page provides verified technical context, validated pin roles, real-world use cases in automotive subsystems, and confirmed alternative parts with documented functional differences for design-in decisions.

Technical Context

The L5300GJTR integrates a P-channel MOSFET pass element enabling dropout voltage as low as 500 mV at 300 mA, while maintaining regulation up to 40 V input. Its internal bandgap reference and on-chip trimming ensure ±2% output voltage accuracy across line, load, and temperature (−40 °C to 150 °C).

Supervisory logic includes a reset circuit triggered when Vo falls below 92–94% of nominal (Vo_th = 6–10% below 5 V), with programmable delay via external capacitor on Vcr; and an early warning comparator monitoring EWi against 2.5 V reference (±70 mV hysteresis), with open-drain EWo output pulled up internally to Vo.

Key Specifications

Parameter	Value and Actual Design Meaning
Output voltage	5.0 V ±2% - guaranteed accuracy over full operating range, eliminating need for external feedback calibration.
Input voltage range	5.6 V to 40 V DC - supports 12 V/24 V automotive battery systems including cold-crank and load-dump transients.
Max output current	300 mA - sufficient for powering MCU cores, CAN transceivers, and sensor interfaces in compact ECUs.
Dropout voltage	500 mV at 300 mA - enables stable 5 V output even during 35 V input dips to 5.6 V, critical for start-stop operation.
Quiescent current	55 µA (enabled, light load); 5 µA (disabled) - meets ultra-low-power requirements for always-on vehicle networks.
Reset threshold	Vo_th = 6–10% below Vo_ref - detects brownout before MCU malfunction, with 2–6 ms programmable delay via external capacitor.
Early warning threshold	Ewi_th_low = 2.35–2.65 V - configurable via resistor divider to monitor pre-regulator input or battery voltage with hysteresis.

Pinout & Package

Package: PowerSSO-12 (exposed thermal pad, surface-mount, thermally enhanced). Pin count: 12 terminals + exposed substrate tab (TAB), with 4 NC pins and 2 open-drain outputs.

Pin/Terminal	Circuit Role	Design Meaning
1, 8, 11	NC	No internal connection - must be left floating or tied to GND per layout guidelines; no electrical function.
2 (Res)	Open-drain reset output	Pulled low when Vo < Vo_th; internal 10–40 kΩ pull-up to Vo - directly drives MCU reset input without external pull-up.
3 (Vcr)	Reset timing capacitor node	Connects external capacitor to GND to set reset delay time (Trd = 32 × Tosc); defines oscillator timing with Icr/Idr = 10–30 µA.
4 (GND)	Ground reference	Main return path for regulator, reset, and early warning circuits; must connect to low-impedance PCB ground plane.
5 (Vos)	Output voltage sense	Feedback node for output regulation - must be connected directly to Vo pin to maintain ±2% accuracy under PCB trace resistance.
6 (Vo)	5 V regulated output	Delivers up to 300 mA; requires ≥220 nF ceramic capacitor to GND for stability - no electrolytic needed.
7 (VS)	Input supply	Accepts 5.6–40 V; requires local ≥100 µF bulk + ≥220 nF high-frequency bypass capacitors near pin.
9 (En)	Enable input	Active-high logic: ≥3 V enables regulator; ≤1 V disables it - supports system-level power gating and wake-up sequencing.
10 (EWi)	Early warning input	Monitors divided input voltage; comparator triggers when EWi < 2.35–2.65 V - enables predictive undervoltage detection.
12 (EWo)	Early warning output	Open-drain output pulled low when EWi drops below threshold; internal 10–40 kΩ pull-up to Vo - signals impending brownout to host controller.
TAB	Substrate thermal pad	Internally connected to die substrate - must be soldered to large copper pour for thermal dissipation (Rthj-amb = 48 °K/W).

Key Features

Feature	Design Value
AEC-Q100 Grade 0 qualification	Validated for automotive applications up to 150 °C junction temperature - meets reliability requirements for engine bay placement.
Very low quiescent current modes	5 µA disabled / 55 µA enabled light-load - extends battery life in always-on domains like telematics and gateway modules.
Programmable reset delay	2–6 ms via external capacitor on Vcr - eliminates need for discrete RC timers and allows precise reset timing alignment with MCU boot sequence.
Early warning with hysteresis	70 mV input threshold hysteresis on EWi - prevents chatter during slow battery voltage decay and enables graceful shutdown planning.
Stability with low-ESR ceramics	Stable with ≥220 nF ceramic output capacitor (ESR ≥100 mΩ) - avoids bulky tantalum or aluminum electrolytics, reducing board area and cost.

Applications

Engine Control Unit (ECU)

Body Control Module (BCM)

Use Scenario: Powers 32-bit MCU, CAN FD transceiver, and analog sensor front-end in gasoline/diesel engine management systems.

IC Role / Device Role / Timing Role: Primary 5 V rail generator with integrated reset and early warning - ensures deterministic MCU startup after cranking and safe shutdown before battery collapse.

Use Value: ±2% output accuracy and 500 mV dropout preserve valid logic levels during 6 V cold-crank; programmable Trd aligns reset pulse with flash memory initialization timing.

Use Scenario: Supplies door module MCU, LIN transceiver, and LED drivers in centralized body electronics architecture.

IC Role / Device Role / Timing Role: System power supervisor - monitors 12 V battery via EWi divider and asserts EWo before undervoltage resets MCU, enabling controlled window/mirror park-out.

Use Value: 70 mV EWi hysteresis prevents false warnings during transient loads (e.g., power window motor stall); 5 µA disable current minimizes parasitic drain in sleep mode.

ADAS Domain Controller

Automotive Gateway

Use Scenario: Provides clean 5 V rail to radar SoC and camera ISP in zonal architecture with centralized compute.

IC Role / Device Role / Timing Role: Secondary regulator with fault reporting - Res output feeds SoC's POR circuit; EWo alerts system manager of input degradation before thermal throttling occurs.

Use Value: 40 V max input withstands ISO 7637-2 Pulse 5a (load dump); thermal shutdown at 150 °C protects against enclosure overheating in sealed enclosures.

Use Scenario: Powers Ethernet switch PHY, CAN transceivers, and secure MCU in vehicle communication backbone.

IC Role / Device Role / Timing Role: Power sequencer - En input synchronizes 5 V rail activation with main 12 V supply stabilization; Vos sensing compensates for PCB IR drop.

Use Value: Vos feedback maintains ±2% regulation despite 100 mΩ trace resistance; 300 mA output supports multi-transceiver simultaneous wake-up.

Equivalent & Alternatives

The following parts are listed as comparable options for similar automotive LDO with supervisory functions applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
NCP109HCMTXG	40 V input, 300 mA, ±2% accuracy, but lacks early warning and programmable reset delay - only basic reset with fixed 200 ms timeout.	Suitable for cost-sensitive non-safety-critical modules where predictive warning is not required.	Select if supervisory feature count can be reduced and board space is constrained (SOT-223 package vs PowerSSO-12).
TLE42754G	5 V, 450 mA, ±2.5% accuracy, includes reset and watchdog, but no early warning or Vcr-programmable delay - reset delay fixed at 140 ms.	Used in legacy power management ICs where watchdog timer integration is prioritized over voltage prediction.	Choose when system-level watchdog functionality is mandatory and higher current capability justifies larger thermal footprint.

Compared with NCP109HCMTXG and TLE42754G, the L5300GJTR uniquely combines early warning with programmable reset delay in a thermally optimized PowerSSO-12 package, enabling predictive power management essential for ASIL-B compliant domains without adding external comparators or timers.

Availability

L5300GJTR is available at Aetrix Electronics and suitable for engine control units, body control modules, and ADAS domain controllers requiring stable component supply, AEC-Q100 compliance, and long-term automotive lifecycle support.

Supply support for L5300GJTR 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 silicon solutions for automotive, industrial, and power management applications.

The L5300GJTR belongs to ST's automotive-grade linear regulator family, engineered specifically for robust power delivery and intelligent supervision in harsh-temperature vehicle subsystems - emphasizing fail-safe behavior, thermal resilience, and integration of safety-critical monitoring functions.

FAQ

What is the minimum output capacitor value required for stability?

The L5300GJTR requires a minimum 220 nF ceramic capacitor between Vo and GND for guaranteed stability across temperature and load conditions. This value is validated per Figure 24 in DS6145 Rev 8, and supports ESR ≥100 mΩ. Larger values (e.g., 470 nF) improve transient response but are not required for basic stability.

How does the early warning function interface with a microcontroller?

The EWo pin is an open-drain output pulled low when EWi falls below its threshold; it must be externally pulled up to the MCU's I/O voltage (e.g., 3.3 V) or internally enabled if the MCU supports weak pull-ups. The MCU monitors EWo as an interrupt-capable GPIO to initiate controlled shutdown before Vo drops out of regulation.

Can the L5300GJTR be used without connecting the Vos pin?

No - the Vos pin must be connected directly to the Vo pin. It serves as the feedback node for output voltage regulation; omitting this connection degrades output accuracy beyond ±2% and may cause instability or improper reset triggering due to unmonitored Vo drift.

What thermal derating applies above 125 °C junction temperature?

Thermal shutdown activates at 150 °C (typical), with 10 °C hysteresis. Between 125 °C and 150 °C, output current capability decreases gradually per Figure 11: at 140 °C, Ilim drops to ~1.2 A (vs 1.6 A at 25 °C), and full shutdown occurs before reaching 150 °C. PCB thermal vias and copper area are critical to sustain rated 300 mA above 100 °C.

L5300GJTR Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Series:: -

Package/Case:: PowerSSO-12

Packaging:: Tape & Reel (TR)

Product Status:: Active

Output Configuration:: Positive

Output Type:: Fixed

Number of Regulators:: 1

Voltage - Input (Max):: 40V

Voltage - Output (Min/Fixed):: 5V

Voltage - Output (Max):: -

Voltage Dropout (Max):: 0.5V @ 300mA

Current - Output:: 300mA

Current - Quiescent (Iq):: 80 µA

Current - Supply (Max):: 4.2 mA

PSRR:: 60dB (100Hz)

Control Features:: Enable, Reset

Protection Features:: Over Temperature, Short Circuit

Operating Temperature:: -40°C ~ 150°C

Grade:: Automotive

Qualification:: AEC-Q100

Mounting Type:: Surface Mount

Supplier Device Package:: PowerSSO-12

L5300GJTR FAQ

1.How can I place an order for L5300GJTR through Aetrix?

Please submit a Request for Quotation (RFQ) for L5300GJTR 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 L5300GJTR reliable?

The price and inventory of L5300GJTR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for L5300GJTR is usually 5 days.

3.What payment methods are accepted for L5300GJTR?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for L5300GJTR transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for L5300GJTR?

L5300GJTR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your L5300GJTR 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 L5300GJTR?

For technical support, including L5300GJTR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your L5300GJTR requirements.

6.How does Aetrix verify that L5300GJTR is sourced from the original manufacturer or authorized distributors?

All L5300GJTR 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 L5300GJTR meets industry standards.

7.What is the process for return or replacement of L5300GJTR?

All L5300GJTR units undergo pre-shipment inspection (PSI). If there is an issue with L5300GJTR, 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 L5300GJTR part is unused and in its original packaging.

Return procedure for L5300GJTR:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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