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STMicroelectronics LD1580P2T-R
- Part No.:
- LD1580P2T-R
- Manufacturer:
- STMicroelectronics
- Package:
- P2PAK (4 Leads + Tab)
- Datasheet:
-
LD1580P2T-R.pdf
- Description:
- IC REG LINEAR POS ADJ 7A P2PAK
- Quantity:
- Payment:
- Shipping:
Inventory:16,564
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Product details
Overview
LD1580P2T-R from STMicroelectronics is a 7 A very low-dropout adjustable positive linear voltage regulator in P²PAK package, featuring 400 mV typical dropout at full load, remote sense capability, ±2% output voltage tolerance over temperature and load, and integrated thermal shutdown with 5 °C hysteresis. It is used in high-current industrial power rails where input-to-output headroom is constrained.
For engineers reviewing the LD1580P2T-R datasheet, LD1580P2T-R pinout, LD1580P2T-R application, or LD1580P2T-R equivalent, key selection criteria include VCONTROL-driven dropout optimization, remote-sense accuracy under dynamic load, current-limit threshold stability across temperature, and P²PAK thermal resistance (RthJC = 3 °C/W) for heatsink-limited designs.
Technical Context
The LD1580 employs a dual-input architecture: VPOWER supplies the output stage while VCONTROL sets regulation reference and drives the pass element, enabling sub-500 mV dropout at 7 A. Its ADJ pin allows programmable output via external resistor divider, and the SENSE pin enables Kelvin sensing to reject PCB trace IR drop.
Thermal protection activates at 170 °C junction temperature with 5 °C hysteresis, preventing latch-up during overload. Output current limiting is internal and non-latching, with threshold ranging from 8 A to 9 A depending on operating conditions - independent of external components.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output current | 7 A continuous; supports high-power FPGA/CPU core rails without external current sharing. |
| Dropout voltage | 400 mV typ. at 7 A; enables operation with ≤0.5 V headroom, critical for 1.8 V/2.5 V systems powered from 3.3 V rails. |
| Output voltage accuracy | ±2% over -40 °C to +125 °C and full load range; ensures stable logic supply under thermal stress. |
| VCONTROL pin current | 60–120 mA at 7 A load; requires robust driver stage when used in feedback-controlled configurations. |
| Thermal shutdown threshold | 170 °C with 5 °C hysteresis; prevents thermal runaway while allowing recovery after transient overload. |
| Line regulation | 0.08–0.24 %; maintains tight output under input rail variation (e.g., battery sag or DC-DC ripple). |
| Load regulation | 0.08–0.4 %; minimizes output droop during step-load transients up to 7 A. |
Pinout & Package
Packaged in P²PAK (Power Package), a surface-mount thermally enhanced outline with exposed drain pad for direct PCB thermal coupling. Designed for high-current, high-thermal-demand applications requiring low RthJC (3 °C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VPOWER | Main power input to output stage | Supplies pass transistor; must be ≥ VO + VDP (min 0.4 V overhead at 7 A). |
| VCONTROL | Reference and gate drive supply | Sets regulation point and drives pass element; must exceed VO by ≥1.05 V at 7 A. |
| SENSE | Remote output voltage sense | Connects directly to load to compensate for PCB trace resistance; improves regulation accuracy. |
| ADJ | Adjustment node for output voltage setting | Used with resistor divider to set VO = 1.25 V × (1 + R2/R1); requires 50–120 µA bias current. |
| GND | Analog ground reference | Common return for ADJ, SENSE, and internal circuitry; separate from power ground in layout-critical designs. |
| OUT | Regulated output terminal | High-current output node; connects to bulk capacitance and load; tied to exposed pad in P²PAK. |
Key Features
| Feature | Design Value |
|---|---|
| Dual-supply architecture (VPOWER + VCONTROL) | Enables <500 mV dropout at full 7 A load while decoupling input rail noise from regulation reference. |
| Remote sense (SENSE pin) | Compensates for up to 100 mΩ PCB trace resistance, maintaining ±0.5% output accuracy at point-of-load. |
| Fast transient response | Settles within 50 µs for 1 A–7 A load steps; reduces required output capacitance by ≥30% vs standard LDOs. |
| On-chip trimming | Delivers ±2% output voltage tolerance across -40 °C to +125 °C without external calibration. |
| Thermal shutdown with hysteresis | 170 °C trip + 5 °C hysteresis avoids oscillation during sustained overload; enables safe auto-recovery. |
Applications
| Industrial Motor Drive Power Supply | FPGA Core Voltage Regulation |
|---|---|
Use Scenario: Regulating 1.2 V core supply for Xilinx Kintex-7 FPGA under dynamic switching loads up to 6.5 A. IC Role / Device Role / Timing Role: Primary adjustable LDO delivering tightly regulated core voltage with remote sensing to offset VRM PCB losses. Use Value: Maintains ±1.5% output stability during 5 A/µs load transients, eliminating need for additional ceramic capacitance. |
Use Scenario: Generating 2.5 V I/O bank supply in PLC backplane controllers with shared 3.3 V intermediate rail. IC Role / Device Role / Timing Role: Low-headroom post-regulator converting 3.3 V to 2.5 V with minimal dropout margin. Use Value: Achieves 400 mV dropout at full load, enabling use of existing 3.3 V rail without redesigning upstream DC-DC stage. |
| Telecom Line Card Bias Supply | Test Equipment Precision Analog Rail |
Use Scenario: Providing 5 V analog bias for high-speed DACs/ADCs in 40 Gbps optical module line cards. IC Role / Device Role / Timing Role: Low-noise, high-PSRR LDO with remote sense to stabilize reference voltage despite board-level current surges. Use Value: 81.5 dB PSRR at 100 Hz suppresses switching noise from adjacent DC-DC converters, preserving ENOB. |
Use Scenario: Delivering 3.3 V precision rail for metrology-grade signal chain ICs in automated test equipment. IC Role / Device Role / Timing Role: Adjustable LDO with ±2% tolerance and thermal stability for calibration-critical analog subsystems. Use Value: Output drift <±0.01%/°C ensures measurement repeatability across environmental test chambers. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar adjustable high-current LDO applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Texas Instruments TPS7A8300RGRT | 3 A max output, 110 mV dropout at 3 A, fixed 1.2 V/1.8 V/2.5 V/3.3 V options only; no VCONTROL pin. | Limited to lower-current digital rails; lacks remote sense and adjustable output beyond factory options. | Select when output is fixed and current ≤3 A; avoid for 7 A or programmable-VOUT needs. |
| ON Semiconductor NCP163AMX330TBG | 300 mA max, 170 mV dropout at 300 mA, SOT-23 package; no thermal shutdown hysteresis or current limit. | Suitable only for ultra-low-power peripherals; cannot scale to industrial motor drive or FPGA loads. | Use only for sensor bias or MCU I/O rails; not a functional substitute for LD1580P2T-R's 7 A capability. |
Compared with TPS7A8300RGRT and NCP163AMX330TBG, LD1580P2T-R uniquely supports 7 A programmable output with remote sensing and dual-supply dropout control - making it irreplaceable in high-current, thermally constrained, or precision-point-of-load applications.
Availability
LD1580P2T-R is available at Aetrix Electronics and suitable for industrial motor drives, FPGA power delivery, telecom line card biasing, and precision test equipment requiring stable component supply and long-term manufacturability.
Supply support for LD1580P2T-R 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 components since 1987.
The LD1580 belongs to ST's high-current linear regulator product line, engineered specifically for industrial and telecom infrastructure where thermal efficiency, output accuracy, and reliability under sustained load are critical design requirements.
FAQ
What is the minimum VCONTROL voltage required for stable 7 A operation?
At 7 A output and 25 °C, VCONTROL must exceed VO by at least 1.05 V (typ.) to 1.3 V (max), per Table 4. For a 1.25 V output, this means VCONTROL ≥ 2.3 V minimum. Below this, dropout increases and regulation degrades; operation below 1.05 V margin risks current limit activation or thermal shutdown.
Can the LD1580P2T-R be used without the SENSE pin connection?
Yes, but with reduced accuracy: SENSE must be shorted to OUT if unused. Without remote sensing, output voltage error rises due to PCB trace resistance - e.g., 50 mΩ trace at 7 A causes 350 mV drop, violating ±2% spec. ST recommends using SENSE for any application demanding >±1% regulation at point-of-load.
How does the VCONTROL pin current scale with load and temperature?
VCONTROL current ranges from 6 mA at 100 mA load to 120 mA at 7 A load (25 °C), increasing further at high temperature. At 125 °C and 7 A, it reaches ~140 mA. Designers must ensure the VCONTROL source can sustain ≥150 mA with <100 mV droop to maintain regulation integrity.
Is the LD1580P2T-R qualified for automotive applications?
No. The LD1580P2T-R is specified for industrial temperature range (-40 °C to +125 °C) but is not AEC-Q100 qualified, lacks automotive-specific failure mode analysis, and is explicitly excluded from safety-critical, automotive, or aerospace use per ST's disclaimer in DocID8974 Rev 6. It is intended for industrial, telecom, and test equipment only.
LD1580P2T-R Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- -
- Package/Case:
- P2PAK (4 Leads + Tab)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Output Configuration:
- Positive
- Output Type:
- Adjustable
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 6V
- Voltage - Output (Min/Fixed):
- 1.25V
- Voltage - Output (Max):
- 6V
- Voltage Dropout (Max):
- -
- Current - Output:
- 7A
- Current - Quiescent (Iq):
- -
- Current - Supply (Max):
- -
- PSRR:
- -
- Control Features:
- -
- Protection Features:
- Over Current, Over Temperature
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- P2PAK
LD1580P2T-R FAQ
1.How can I place an order for LD1580P2T-R through Aetrix?
Please submit a Request for Quotation (RFQ) for LD1580P2T-R 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 LD1580P2T-R reliable?
The price and inventory of LD1580P2T-R are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LD1580P2T-R is usually 5 days.
3.What payment methods are accepted for LD1580P2T-R?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LD1580P2T-R transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LD1580P2T-R?
LD1580P2T-R orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LD1580P2T-R 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 LD1580P2T-R?
For technical support, including LD1580P2T-R datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LD1580P2T-R requirements.
6.How does Aetrix verify that LD1580P2T-R is sourced from the original manufacturer or authorized distributors?
All LD1580P2T-R 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 LD1580P2T-R meets industry standards.
7.What is the process for return or replacement of LD1580P2T-R?
All LD1580P2T-R units undergo pre-shipment inspection (PSI). If there is an issue with LD1580P2T-R, 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 LD1580P2T-R part is unused and in its original packaging.
Return procedure for LD1580P2T-R:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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