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Diodes Incorporated AP3586BMPTR-G1
- Part No.:
- AP3586BMPTR-G1
- Manufacturer:
- Diodes Incorporated
- Category:
- DC DC Switching Controllers
- Package:
- 8-SOIC (0.154", 3.90mm Width) Exposed Pad
- Datasheet:
-
AP3586BMPTR-G1.pdf
- Description:
- IC REG CTRLR BUCK 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,205
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Product details
Overview
AP3586BMPTR-G1 from BCD Semiconductor is a fixed-frequency voltage-mode synchronous buck PWM controller in PSOP-8 package, designed for 5V/12V input supplies to generate tightly regulated 0.8V output (±12mV tolerance) with up to 82% duty cycle, integrated 12V bootstrap drivers, built-in boot diode, and lossless RDS(ON)-based overcurrent protection. It delivers fast transient response in DDR/SDRAM termination and graphics card power rails.
For engineers reviewing the AP3586BMPTR-G1 datasheet, AP3586BMPTR-G1 pinout, AP3586BMPTR-G1 application, or AP3586BMPTR-G1 equivalent, key selection criteria include its 300kHz fixed switching frequency, 0.8V internal reference, 10MHz error amplifier GBW, adaptive shoot-through protection, and PSOP-8 thermal pad grounding - all critical for high-efficiency, space-constrained point-of-load designs.
Technical Context
The AP3586BMPTR-G1 implements voltage-mode control with a single feedback loop referenced to a precision 0.8V internal bandgap. Its error amplifier delivers 10MHz gain-bandwidth and 6V/µs slew rate to support high-loop bandwidth and sub-20µs load transient recovery in 1.2V/10A applications.
It integrates dual N-channel MOSFET gate drivers (UGATE/LGATE) with 1.5A sink/1.0A source capability, adaptive shoot-through protection monitored at UGATE and PHASE pins, and programmable overcurrent protection using LGATE as OCSET input - eliminating external sense resistors by leveraging low-side MOSFET RDS(ON).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Switching Frequency | 300 kHz fixed - enables compact magnetics and predictable EMI profile for subsystem power supplies. |
| Feedback Reference Voltage | 0.8 V ±12 mV - sets minimum output voltage; supports SSTL-2 and DDR2/3 bus termination at 1.25V–1.8V via resistor divider. |
| Error Amplifier GBW | 10 MHz - provides high control-loop bandwidth to maintain regulation during rapid 0→10A load steps. |
| Max Duty Cycle | 82% - limits maximum output to 0.82×VIN, ensuring sufficient off-time for reliable RDS(ON)-based OCP sampling. |
| OC Protection Method | Lossless RDS(ON) sensing via LGATE pin - eliminates current-sense resistor, reduces BOM count and board area. |
| Bootstrap Diode | Integrated - removes external diode, simplifies layout and improves reliability in high-density PCBs. |
| Soft-start Interval | 2.7 ms - prevents inrush current into pre-biased loads common in hot-plug SDRAM modules. |
Pinout & Package
AP3586BMPTR-G1 is housed in an exposed-pad PSOP-8 package optimized for thermal dissipation; the exposed pad must be soldered directly to a large GND copper area on the PCB.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| BOOT (Pin 1) | Bootstrap capacitor node | Generates >12V gate drive for upper N-MOSFET; requires ceramic cap to PHASE to sustain high-side conduction. |
| UGATE (Pin 2) | High-side gate driver output | Drives upper MOSFET gate; monitored for adaptive shoot-through prevention during dead-time control. |
| GND (Pin 3) | Power and signal ground reference | Low-impedance return path for all currents; exposed pad must connect to same plane for thermal + electrical integrity. |
| LGATE/OCSET (Pin 4) | Low-side gate driver + OCP programming | Drives lower MOSFET gate; resistor from this pin to GND sets overcurrent threshold via 21.5µA internal current source. |
| VCC (Pin 5) | Bias supply input | Accepts 5V or 12V input; requires local 1µF ceramic bypass to GND for stable internal regulator operation. |
| FB (Pin 6) | Feedback input | Inverting input of error amp; connects to resistor divider from output to set regulated voltage per VREF = 0.8V. |
| COMP/EN (Pin 7) | Compensation network + enable control | Output of error amp; pulled low disables IC; rising >0.3V initiates soft-start; 120µA internal current source charges compensation network. |
| PHASE (Pin 8) | Switch node connection | Connects to source of upper MOSFET and drain of lower MOSFET; high dV/dt node requiring tight layout and minimal trace area. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated bootstrap diode | Eliminates external diode, reducing component count and layout sensitivity in high-frequency buck stages. |
| Voltage-mode control with 10MHz GBW | Enables stable loop compensation with standard Type-II networks and fast recovery from 10A load transients. |
| Adaptive shoot-through protection | Monitors UGATE and PHASE timing to dynamically adjust dead time, preventing cross-conduction without fixed delay tables. |
| Start-up into pre-biased output | Supports hot-insertion in modular systems where output rail is already charged, avoiding reverse current flow. |
| Thermal shutdown with 20°C hysteresis | Shuts down at 160°C junction; resumes operation only after cooling to ~140°C, preventing thermal cycling damage. |
Applications
| DDR2/3 SDRAM Bus Termination | PCI/AGP Graphics Card Core Supply |
|---|---|
|
Use Scenario: Providing stable 1.25V–1.8V termination voltage for DDR2/3 memory buses with tight regulation and low noise. IC Role / Device Role / Timing Role: Primary voltage-mode buck controller regulating termination rail; manages dynamic current demand during burst reads/writes. Use Value: 0.8V reference and 82% max duty cycle enable precise scaling across VDDQ ranges; built-in soft-start prevents data corruption during power-up. |
Use Scenario: Delivering clean, high-current core voltage (e.g., 1.0V/15A) to GPU ASICs on PCIe graphics cards. IC Role / Device Role / Timing Role: Synchronous buck controller with integrated drivers; handles fast load steps induced by shader unit activation. Use Value: 10MHz error amplifier GBW and 6V/µs slew rate reduce output deviation to <±30mV under 10A/µs transients. |
| Cable Modem Power Management | Industrial FPGA I/O Bank Supply |
|
Use Scenario: Generating isolated 1.2V/3.3V rails in space-constrained cable modem front-end boards with strict thermal limits. IC Role / Device Role / Timing Role: Compact buck controller replacing discrete driver + controller solutions; PSOP-8 package aids thermal management. Use Value: Integrated boot diode and exposed-pad PSOP-8 reduce footprint by >30% vs SOIC-8 alternatives while maintaining 125°C TJ rating. |
Use Scenario: Powering configurable I/O banks on industrial FPGAs requiring multiple independent 1.2V–2.5V supplies with fault tolerance. IC Role / Device Role / Timing Role: Fault-protected buck controller managing rail sequencing and hiccup-mode OCP for field-replaceable modules. Use Value: Non-latched OVP/UVP and four-cycle hiccup OCP allow automatic recovery from momentary overloads without system reset. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AP3586AMTR-G1 | 0.6V reference, 300kHz, SOIC-8 package - lacks PSOP-8 thermal pad and has higher thermal resistance (θJA = 50°C/W vs 42°C/W). | Suitable for lower-power (<8A) applications where board space allows larger SOIC footprint and thermal margin is adequate. | Select when 0.6V output is required (e.g., CPU core rails) and thermal constraints permit SOIC-8 mounting. |
| RT8205AZSP | 300kHz, 0.6V ref, integrated high/low-side MOSFETs - monolithic solution with no external power stage needed. | Replaces entire buck stage (controller + FETs); not pin-compatible and requires different layout, compensation, and thermal design. | Choose for ultra-compact designs needing <5mm² solution size, accepting trade-offs in efficiency at >10A and thermal coupling between controller/FETs. |
Compared with AP3586AMTR-G1, the AP3586BMPTR-G1 offers higher output voltage flexibility (0.8V ref) and superior thermal performance via PSOP-8; versus RT8205AZSP, it retains discrete FET control for optimized efficiency and thermal separation but requires additional layout effort.
Availability
AP3586BMPTR-G1 is available at Aetrix Electronics and suitable for DDR/SDRAM termination, graphics card power delivery, and industrial FPGA I/O supplies requiring stable component supply, RoHS-compliant packaging, and long-term lifecycle support.
Supply support for AP3586BMPTR-G1 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
BCD Semiconductor Manufacturing Limited is a China-based fabless analog IC designer specializing in power management, LED drivers, and mixed-signal solutions for consumer, industrial, and computing markets.
The AP3586 series targets cost-sensitive, high-volume point-of-load applications demanding integration, thermal robustness, and protection - especially in graphics, memory, and broadband infrastructure equipment.
FAQ
What is the purpose of the LGATE/OCSET pin on AP3586BMPTR-G1?
The LGATE/OCSET pin serves dual functions: it outputs the low-side MOSFET gate drive signal and accepts a resistor to GND that sets the overcurrent protection threshold. An internal 21.5µA current source flows through this resistor to generate a voltage proportional to the low-side MOSFET's RDS(ON), enabling lossless current sensing without a shunt resistor.
Can AP3586BMPTR-G1 operate with a 3.3V input supply?
No - the AP3586BMPTR-G1 requires a minimum VCC supply of 5V per its Recommended Operating Conditions. While the VIN input range extends down to 3.3V for the power stage, the controller's bias supply (VCC pin) must be 5V or 12V; operation below 5V will prevent proper startup due to the 4.2V POR threshold.
How does the COMP/EN pin control enable/disable functionality?
The COMP/EN pin combines error amplifier output and chip enable logic. Pulling it below 0.25V disables the controller, forcing UGATE and LGATE low. Releasing it allows an internal 120µA current source to charge the external compensation network; once voltage exceeds 0.3V, soft-start initiates. During normal operation, COMP voltage reflects loop error and regulates output.
Is the PSOP-8 package of AP3586BMPTR-G1 compatible with SOIC-8 footprints?
No - PSOP-8 has a different lead frame structure, wider body, and exposed thermal pad underneath, making it mechanically and thermally incompatible with SOIC-8 land patterns. The PSOP-8 requires dedicated PCB layout with thermal vias to GND and adjusted pad dimensions per BCD's recommended footprint in the datasheet.
AP3586BMPTR-G1 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 Type:
- Transistor Driver
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Number of Outputs:
- 1
- Output Phases:
- 1
- Voltage - Supply (Vcc/Vdd):
- 5V ~ 12V
- Frequency - Switching:
- 300kHz
- Duty Cycle (Max):
- 82%
- Synchronous Rectifier:
- Yes
- Clock Sync:
- No
- Serial Interfaces:
- -
- Control Features:
- Enable, Phase Control
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SO-EP
AP3586BMPTR-G1 FAQ
1.How can I place an order for AP3586BMPTR-G1 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP3586BMPTR-G1 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 AP3586BMPTR-G1 reliable?
The price and inventory of AP3586BMPTR-G1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP3586BMPTR-G1 is usually 5 days.
3.What payment methods are accepted for AP3586BMPTR-G1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP3586BMPTR-G1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP3586BMPTR-G1?
AP3586BMPTR-G1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP3586BMPTR-G1 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 AP3586BMPTR-G1?
For technical support, including AP3586BMPTR-G1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP3586BMPTR-G1 requirements.
6.How does Aetrix verify that AP3586BMPTR-G1 is sourced from the original manufacturer or authorized distributors?
All AP3586BMPTR-G1 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 AP3586BMPTR-G1 meets industry standards.
7.What is the process for return or replacement of AP3586BMPTR-G1?
All AP3586BMPTR-G1 units undergo pre-shipment inspection (PSI). If there is an issue with AP3586BMPTR-G1, 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 AP3586BMPTR-G1 part is unused and in its original packaging.
Return procedure for AP3586BMPTR-G1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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