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STMicroelectronics LDL112PU30R
- Part No.:
- LDL112PU30R
- Manufacturer:
- STMicroelectronics
- Package:
- 6-WFDFN Exposed Pad
- Datasheet:
-
LDL112PU30R.pdf
- Description:
- IC REG LINEAR 3V 1.2A 6DFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,357
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Product details
Overview
LDL112PU30R from STMicroelectronics is a 3.0 V fixed-output, 1.2 A low-dropout linear regulator with 300 mV typical dropout at 1 A, ±2.0% output voltage tolerance at 25 °C, reverse current protection, and logic-controlled shutdown. It operates from 1.6–5.5 V input and supports ceramic output capacitors as small as 1 µF - ideal for USB-powered devices and battery-powered point-of-load regulation.
For engineers reviewing the LDL112PU30R datasheet, LDL112PU30R pinout, LDL112PU30R application, or LDL112PU30R equivalent, key selection criteria include dropout performance under 1.2 A load, sub-1 µA shutdown current, thermal protection behavior at 165 °C, and compatibility with compact DFN6 (2x2) packaging for space-constrained portable designs.
Technical Context
The LDL112PU30R uses a PMOS pass transistor architecture enabling true reverse current blocking and ultra-low quiescent current (35 µA typ. at no load). Its internal bandgap reference (800 mV) and error amplifier regulate output via feedback to maintain stability with 1 µF ceramic output capacitance.
Logic-controlled enable (EN) pin provides active-high operation with defined thresholds (0.35 V low, 1.4 V high), while integrated thermal shutdown (165 °C, 20 °C hysteresis) and current limiting (~2 A short-circuit) ensure robustness in transient overloads and ambient temperature extremes from –40 °C to 125 °C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output voltage | Fixed 3.0 V ±2.0% at 25 °C - ensures stable rail for 3.3 V-tolerant microcontrollers and sensors without external resistors. |
| Max output current | 1.2 A guaranteed - supports moderate-power peripherals like USB PHYs or display drivers in portable systems. |
| Dropout voltage | 300 mV typ. at 1 A load - enables regulation from 3.3 V input down to 3.0 V output, critical for single-cell Li-ion (3.0–4.2 V) applications. |
| Quiescent current | 35 µA typ. at no load; ≤1 µA in shutdown - extends battery life in always-on monitoring circuits and sleep-mode IoT endpoints. |
| Input voltage range | 1.6 V to 5.5 V - compatible with coin cells, single Li-ion, USB 5 V, and regulated 3.3 V/2.5 V supplies. |
| Thermal shutdown | 165 °C with 20 °C hysteresis - prevents permanent damage during sustained overload or poor PCB heatsinking. |
| Reverse current protection | Active in both ON and OFF states - eliminates backfeed risk when multiple power domains (e.g., USB + battery) share VOUT. |
Pinout & Package
LDL112PU30R is packaged in DFN6 (2x2) mm with exposed thermal pad - optimized for low-profile, high-thermal-performance layouts in handheld and wearable electronics.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | LDO input supply | Accepts 1.6–5.5 V; requires local 1 µF ceramic decoupling near pin to suppress input ripple and ensure stability. |
| GND | Power ground reference | Must connect exposed pad directly to PCB ground plane for thermal conduction and noise immunity. |
| EN | Enable logic input | Active-high control: <0.35 V = shutdown (<1 µA IQ), >1.4 V = active; must not float - tie to VIN or controller GPIO. |
| VOUT | Regulated output | Delivers 3.0 V ±2.0% up to 1.2 A; stable with 1–10 µF ceramic COUT (ESR < 100 mΩ recommended). |
| NC | No-connect terminal | Not internally bonded - leave unconnected per datasheet; no routing or soldering required. |
| Exposed pad | Thermal and electrical ground | Electrically tied to GND; mandatory connection to large copper area for RthJA = 65 °C/W and safe 1.2 A operation. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low dropout | 300 mV at 1 A enables use with input voltages as low as 3.3 V - essential for brownout resilience in battery-fed systems. |
| Reverse current blocking | Prevents VOUT-to-VIN backfeed during hot-swap, backup power switchover, or EN deactivation - eliminates need for external diode. |
| Ceramic capacitor compatible | Stable with 1 µF X7R/X5R ceramic output cap - reduces BOM count, board area, and cost vs. tantalum or aluminum electrolytics. |
| Sub-µA shutdown mode | <1 µA total current draw when EN = GND - meets stringent energy budget requirements for multi-year battery life in sensor nodes. |
| Integrated protection | Current limit (~2 A) and thermal shutdown (165 °C) act autonomously - no external circuitry needed for fault containment. |
Applications
| USB-C Peripheral Power | Wearable Sensor Hub |
|---|---|
|
Use Scenario: Powering USB-C audio adapters or HID dongles drawing up to 1.2 A from 5 V bus while maintaining 3.0 V rail. IC Role / Device Role / Timing Role: Primary LDO delivering clean, regulated 3.0 V to MCU, codec, and interface logic; enables direct USB VBUS sourcing without buck conversion. Use Value: Eliminates need for discrete reverse-blocking diode and reduces solution size by 40% versus legacy 3-pin LDOs requiring ≥10 µF output capacitance. |
Use Scenario: Supplying 3.0 V to ultra-low-power motion sensor fusion subsystem (accelerometer, gyroscope, BLE SoC) in smartwatch. IC Role / Device Role / Timing Role: Always-on LDO powering sensor signal chain and wake-up logic; EN synchronized to host MCU sleep state. Use Value: 35 µA quiescent current extends coin-cell lifetime beyond 2 years; reverse current protection prevents battery drain when BLE radio transmits. |
| Industrial Handheld Terminal | Low-Voltage Point-of-Load |
|
Use Scenario: Regulating 3.0 V for ARM Cortex-M7 MCU and 3.3 V I/O buffer in ruggedized barcode scanner operating from 3.6 V Li-ion pack. IC Role / Device Role / Timing Role: Main system LDO handling dynamic load steps (0–1.2 A) during scan bursts; thermal protection prevents lockup in sealed enclosures. Use Value: 300 mV dropout allows full 3.0 V output across entire battery discharge curve (4.2 V → 3.0 V), avoiding premature brownout resets. |
Use Scenario: Generating localized 3.0 V rail from 3.3 V system supply for noise-sensitive analog front-end (AFE) in medical patch monitor. IC Role / Device Role / Timing Role: Post-regulator isolating AFE from digital switching noise; low 135 µVRMS output noise preserves ADC SNR. Use Value: Ceramic-capacitor stability and 57 dB PSRR at 1 kHz suppress coupling from nearby DC-DC converters, meeting IEC 60601 EMI limits. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Torex XC6210B302MR-G | 300 mA max output, 200 mV dropout at 300 mA, no reverse current protection | Suitable only for sub-300 mA loads; lacks backfeed blocking - requires external diode in dual-supply systems | Select only if load current ≤300 mA and reverse current risk is mitigated externally. |
| ROHM BD30GA5WEFJ-E2 | 300 mA output, 150 mV dropout at 300 mA, 1 µA shutdown, but no thermal shutdown or current limit | Lower thermal robustness - unsuitable for sustained 1.2 A loads or enclosed environments above 60 °C ambient | Choose only for low-power, thermally benign applications where protection features are redundant. |
Compared with XC6210B302MR-G and BD30GA5WEFJ-E2, LDL112PU30R uniquely delivers 1.2 A output with integrated reverse current blocking, thermal shutdown, and current limiting - making it the sole option among the three qualified for high-current, safety-critical, or multi-rail battery systems.
Availability
LDL112PU30R is available at Aetrix Electronics and suitable for USB-powered devices, battery-powered wearables, and low-voltage point-of-load regulation requiring stable component supply, long-lifecycle support, and automotive-grade reliability (AEC-Q100 not claimed, but -40 °C to 125 °C operation verified).
Supply support for LDL112PU30R 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 consumer markets since 1987.
The LDL112 series targets ultra-low-power, high-reliability linear regulation in space-constrained portable and battery-operated systems - emphasizing dropout efficiency, reverse current safety, and ceramic-capacitor simplicity over traditional LDO trade-offs.
FAQ
What is the minimum input voltage required to maintain 3.0 V output at 1.2 A?
The LDL112PU30R requires VIN ≥ VOUT + VDROP. At 1.2 A and –40 °C to 125 °C, maximum dropout is 600 mV per Table 4. Thus, minimum VIN = 3.0 V + 0.6 V = 3.6 V. Below this, output drops out of regulation - confirmed by Figure 19 and DS10321 p.6.
Can LDL112PU30R be used with a 1 µF X5R ceramic capacitor on VOUT?
Yes - the datasheet explicitly states "Compatible with ceramic capacitor COUT = 1 µF" and Figure 25 confirms stability with 1 µF and ESR < 100 mΩ. X5R dielectric meets this requirement; avoid Z5U or Y5V due to voltage/temperature drift affecting ESR.
Does the EN pin require a pull-up resistor when driven by an open-drain GPIO?
Yes - EN is active-high with no internal pull-up. If driven by open-drain, a 10–100 kΩ pull-up to VIN is required to guarantee >1.4 V logic high. Leaving EN floating risks undefined operation and potential shoot-through or oscillation per Table 4 and Section 2 pin description.
Is reverse current protection active when the device is disabled (EN = GND)?
Yes - Section 6.3 explicitly states reverse current blocking occurs in both off-state (EN = GND, VOUT > VIN + 100 mV) and on-state conditions. The PMOS pass element is fully isolated, preventing any VOUT-to-VIN conduction regardless of EN state.
LDL112PU30R Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- -
- Package/Case:
- 6-WFDFN Exposed Pad
- 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):
- 3V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.6V @ 1.2A
- Current - Output:
- 1.2A
- Current - Quiescent (Iq):
- 70 µA
- Current - Supply (Max):
- 400 µA
- PSRR:
- 57dB (1kHz)
- Control Features:
- Enable
- Protection Features:
- Over Current, Over Temperature, Reverse Current
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 6-DFN (2x2)
LDL112PU30R FAQ
1.How can I place an order for LDL112PU30R through Aetrix?
Please submit a Request for Quotation (RFQ) for LDL112PU30R 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 LDL112PU30R reliable?
The price and inventory of LDL112PU30R are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LDL112PU30R is usually 5 days.
3.What payment methods are accepted for LDL112PU30R?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LDL112PU30R transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LDL112PU30R?
LDL112PU30R orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LDL112PU30R 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 LDL112PU30R?
For technical support, including LDL112PU30R datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LDL112PU30R requirements.
6.How does Aetrix verify that LDL112PU30R is sourced from the original manufacturer or authorized distributors?
All LDL112PU30R 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 LDL112PU30R meets industry standards.
7.What is the process for return or replacement of LDL112PU30R?
All LDL112PU30R units undergo pre-shipment inspection (PSI). If there is an issue with LDL112PU30R, 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 LDL112PU30R part is unused and in its original packaging.
Return procedure for LDL112PU30R:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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