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Diodes Incorporated AP7175SP-13
- Part No.:
- AP7175SP-13
- Manufacturer:
- Diodes Incorporated
- Package:
- 8-SOIC (0.154", 3.90mm Width) Exposed Pad
- Datasheet:
-
AP7175SP-13.pdf
- Description:
- IC REG LINEAR POS ADJ 3A 8SO
- Quantity:
- Payment:
- Shipping:
Inventory:1,496
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Product details
Overview
AP7175SP-13 from Diodes Incorporated is a 3.0A ultra-low-dropout linear regulator with dual supply inputs (VIN: 1.2–3.65V, VCNTL: 3.0–5.5V), enable input, power-good open-drain output, and ±1.5% output voltage accuracy over load/line/temperature. It delivers 1.2V @ 3A for FPGAs and DSPs with fast transient response and internal soft-start.
For engineers reviewing the AP7175SP-13 datasheet, AP7175SP-13 pinout, AP7175SP-13 application, or AP7175SP-13 equivalent, key selection criteria include dropout voltage at 3A (0.23–0.42V), thermal shutdown at +170°C, PG delay time (1–4ms), and compatibility with low-ESR MLCCs down to 8µF.
Technical Context
The AP7175SP-13 uses a precision 0.8V reference and error amplifier to regulate output via external resistor divider on FB, supporting adjustable VOUT from 0.8V to VIN–VDROP. Its dual-supply architecture separates power path (VIN→VOUT) from control bias (VCNTL), enabling sub-250mV dropout at 3A while minimizing junction temperature rise.
Power sequencing is managed by independent POR monitors on VIN (0.8–1.0V threshold) and VCNTL (2.5–2.95V), triggering soft-start only when both are valid. The PG output asserts after a 1–4ms delay once FB reaches 90–95% of VREF and debounces with 10µs hysteresis to prevent chatter during transients.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VIN Range | 1.2V to 3.65V - supports core rail regulation for 1.2V/1.8V/2.5V systems without external boost |
| VCNTL Range | 3.0V to 5.5V - bias supply independent of VIN, enabling stable control under low-input conditions |
| Max Output Current | 3.0A continuous - sufficient for FPGA I/O banks or DDR memory termination (VTT) |
| Dropout Voltage | 0.23V @ 1.2V/3A - enables high-efficiency regulation near minimum system voltage |
| Output Accuracy | ±1.5% over -40°C to +125°C - ensures reliable operation across industrial temperature range |
| PG Delay Time | 1–4ms - provides deterministic power-good assertion timing for sequenced system startup |
| Thermal Shutdown | +170°C with +50°C hysteresis - protects against sustained overload without latch-up |
Pinout & Package
AP7175SP-13 is housed in SO-8EP package with exposed thermal pad connected to VIN. The package features 1.45mm height, 4.90mm × 3.85mm body, and thermal resistance θJA = 70°C/W (2oz copper, 2"×2" board).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND | Ground reference | Common return for feedback, control logic, and thermal pad connection point |
| FB | Feedback input | Senses output voltage via resistor divider; compared to 0.8V reference for regulation |
| VOUT | Regulated output | Delivers up to 3A; internally discharged when disabled via pull-low MOSFET |
| EN | Enable control | Active-high; internal 5µA pull-up eliminates need for external resistor |
| PG | Power-good indicator | Open-drain output pulled low if VOUT out-of-regulation, thermal shutdown, or supply fault |
| VCNTL | Bias supply input | Powers control circuitry; decoupling ≥1µF required for noise immunity |
| VIN | Power input | Supplies output current path; decoupling ≥10µF required near pin for stability |
| EP (Pad) | Thermal interface | Exposed pad must be soldered to VIN plane for optimal θJC = 30°C/W performance |
Key Features
| Feature | Design Value |
|---|---|
| Dual-supply architecture | Separates VIN (power path) and VCNTL (control bias) to achieve <0.25V dropout at 3A |
| Integrated soft-start | 0.6ms typical ramp time limits inrush current during FPGA/DSP power-up |
| Power-on reset monitoring | Independent POR on VIN (0.9V typ) and VCNTL (2.7V typ) ensures safe startup sequencing |
| Low-ESR capacitor support | Stable with 8µF MLCCs - reduces BOM count and PCB area vs. traditional tantalum solutions |
| Thermal protection with hysteresis | +170°C shutdown with +50°C recovery margin prevents cycling under marginal cooling |
Applications
| Front-Side Bus VTT | FPGA Core Rail |
|---|---|
|
Use Scenario: Providing 1.2V/3.3A termination for Intel/AMD front-side bus signaling. IC Role / Device Role / Timing Role: Low-noise, fast-transient LDO delivering precise VTT voltage with tight DC accuracy and minimal droop during bus switching. Use Value: Maintains signal integrity by holding VTT within ±1.5% during 10mA–3A load steps, enabled by 0.23V dropout and 0.6ms soft-start. |
Use Scenario: Powering FPGA configuration and logic banks requiring clean, sequenced 1.2V supply. IC Role / Device Role / Timing Role: Primary core regulator with PG output synchronized to FPGA INIT_B assertion and EN-controlled power sequencing. Use Value: Ensures reliable configuration by asserting PG only after 1–4ms delay post-VOUT stabilization, preventing premature FPGA release from reset. |
| Server Memory Termination | Notebook CPU I/O Rail |
|
Use Scenario: Supplying DDR3/DDR4 VTT rails in enterprise servers where thermal density and reliability are critical. IC Role / Device Role / Timing Role: High-current LDO with thermal shutdown (+170°C) and robust short-circuit protection (1.1A limit) for unattended operation. Use Value: Survives sustained 3A loads in confined chassis via SO-8EP exposed pad tied to VIN plane, achieving θJA = 70°C/W with standard PCB layout. |
Use Scenario: Regulating CPU I/O voltage in space-constrained notebook platforms with aggressive thermal budgets. IC Role / Device Role / Timing Role: Compact SO-8EP LDO replacing larger packages, leveraging dual-supply design to maintain regulation during battery sag (VIN down to 1.2V). Use Value: Delivers full 3A output even as input drops to 1.2V - extends usable battery life without compromising I/O performance. |
Availability
AP7175SP-13 is available at Aetrix Electronics and suitable for FPGA power sequencing, DDR memory termination, server motherboard VTT rails, and notebook CPU I/O regulation requiring stable component supply across industrial temperature ranges.
Supply support for AP7175SP-13 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
Diodes Incorporated is a global manufacturer of discrete semiconductors and analog ICs, specializing in high-reliability power management, signal integrity, and protection solutions for industrial, computing, and communications markets.
The AP7175 belongs to Diodes' ultra-low-dropout LDO family designed specifically for high-current, low-voltage applications in FPGAs, DSPs, and memory subsystems where precision, thermal resilience, and sequencing control are critical.
FAQ
What is the minimum output capacitance required for stability with AP7175SP-13?
The AP7175SP-13 requires a minimum 8µF output capacitor for 3A operation at 25% nominal VOUT deviation, per datasheet Section 7. This value scales inversely with load current (e.g., 2400µF at 1A). Stability is maintained with low-ESR MLCCs down to 200mΩ, eliminating need for bulk electrolytics in most designs.
How does the dual-supply architecture improve thermal performance?
By separating VIN (power path) from VCNTL (control bias), the AP7175SP-13 isolates high-current conduction losses from control circuitry. This allows the pass element to operate at lower junction temperatures, reducing θJA to 70°C/W in SO-8EP and enabling 3A output without external heatsinking under typical PCB layouts.
Can AP7175SP-13 be used without an external pull-up resistor on EN?
Yes - AP7175SP-13 includes an internal 5µA pull-up current source on the EN pin. When left floating, this source drives EN above its 0.8V logic-high threshold, enabling the device without external components. This reduces BOM count and simplifies layout in space-constrained applications.
What happens to VOUT when AP7175SP-13 is disabled?
When EN is driven low, the AP7175SP-13 actively discharges VOUT through an internal pull-low MOSFET. This ensures rapid, controlled output collapse - critical for safe power-down sequencing in multi-rail systems and preventing back-powering of upstream circuitry via parasitic paths.
AP7175SP-13 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width) Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Output Configuration:
- Positive
- Output Type:
- Adjustable
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 3.65V
- Voltage - Output (Min/Fixed):
- 0.8V
- Voltage - Output (Max):
- 3.23V
- Voltage Dropout (Max):
- 0.42V @ 3A
- Current - Output:
- 3A
- Current - Quiescent (Iq):
- 1.5 mA
- Current - Supply (Max):
- -
- PSRR:
- -
- Control Features:
- Enable, Power Good
- Protection Features:
- Over Current, Over Temperature, Power On Reset (POR), Short Circuit, Soft Start
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SO-EP
AP7175SP-13 FAQ
1.How can I place an order for AP7175SP-13 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP7175SP-13 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 AP7175SP-13 reliable?
The price and inventory of AP7175SP-13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP7175SP-13 is usually 5 days.
3.What payment methods are accepted for AP7175SP-13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP7175SP-13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP7175SP-13?
AP7175SP-13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP7175SP-13 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 AP7175SP-13?
For technical support, including AP7175SP-13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP7175SP-13 requirements.
6.How does Aetrix verify that AP7175SP-13 is sourced from the original manufacturer or authorized distributors?
All AP7175SP-13 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 AP7175SP-13 meets industry standards.
7.What is the process for return or replacement of AP7175SP-13?
All AP7175SP-13 units undergo pre-shipment inspection (PSI). If there is an issue with AP7175SP-13, 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 AP7175SP-13 part is unused and in its original packaging.
Return procedure for AP7175SP-13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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