Send an Inquiry

To receive a quote for your project, please fill in the following information, and we’ll get back to you promptly.

Submit Inventory List

Please fill in the following information, and we’ll get back to you promptly.

Home > Products > Integrated Circuits (ICs) > Power Management (PMIC) > Voltage Regulators - DC DC Switching Regulators

Diodes Incorporated AP6508FE-7

Name: AP6508FE-7
Brand: Diodes Incorporated
SKU: AP6508FE-7
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

Compare

Part No.:: AP6508FE-7

Manufacturer:: Diodes Incorporated

Category:: Voltage Regulators - DC DC Switching Regulators

Package:: 14-UFDFN Exposed Pad

Datasheet:: AP6508FE-7.pdf

Description:: IC REG BUCK ADJ 3A DFN4030-14

Quantity:: RFQ Add To RFQ list

Payment:

Shipping:

Inventory:1,954

Please send an inquiry. Send us your inquiry, and we will respond immediately.

Product details

Overview

AP6508FE-7 from Diodes Incorporated is a 500kHz synchronous step-down DC/DC converter with integrated high- and low-side MOSFETs (R_DS(ON) = 120 mΩ / 20 mΩ), supporting 4.5V–21V input and adjustable 0.807V–15V output delivering up to 3A continuous load current at 93% peak efficiency. It features current-mode control, internal compensation, Power Good flag, external soft-start, and full protection including OCP and thermal shutdown - deployed in gaming consoles, TV power rails, and distributed power systems.

For engineers reviewing the AP6508FE-7 datasheet, AP6508FE-7 pinout, AP6508FE-7 application, or AP6508FE-7 equivalent, key selection considerations include its DFN4030-14 package with exposed thermal pad, 500kHz fixed-frequency operation, 0.807V feedback reference with ±13mV tolerance over temperature, and EN/SS/PG signal routing for sequencing-critical embedded power domains.

Technical Context

The AP6508FE-7 implements current-mode control with built-in slope compensation to suppress subharmonic oscillation at half-switching frequency (250kHz), enabling stable loop response without external compensation components. Its error amplifier features a clamped 2.1V maximum output and integrates a 50pF/200kΩ RC network for full internal voltage-loop compensation.

It uses a bootstrap gate drive architecture (BST pin) to bias the high-side MOSFET, requires no external bootstrap diode, and incorporates cycle-by-cycle overcurrent protection triggered by HS R_DS(ON) sensing with fold-back frequency reduction (to 150kHz) when FB falls below 300mV - preventing current runaway during short-circuit events.

Key Specifications

Parameter	Value and Actual Design Meaning
V_IN Range	4.5V to 21V - supports wide-input industrial and consumer DC rails including 12V and 19V adapter inputs.
I_OUT Max	3A continuous - sufficient for core logic rails in set-top boxes and audio SoCs without external heatsinking.
f_SW	500kHz ±150kHz - enables compact magnetics (e.g., 3.3µH) while balancing EMI and efficiency trade-offs.
V_FB	0.807V ±13mV (–40°C to +85°C) - sets output accuracy for 1.2V/1.8V/2.5V/3.3V/5V rails using standard resistor dividers.
Efficiency	Up to 93% at V_IN=12V, V_OUT=5V, I_OUT=3A - achieved via low R_DS(ON) FETs (120/20 mΩ) and synchronous rectification.
Thermal Shutdown	140°C with 20°C hysteresis - protects die during sustained overload or poor PCB thermal design; resumes after cooling to ~120°C.
Protection	OCP (5.8A limit), UVLO (4.2V rising threshold), thermal shutdown, and PG fault detection - enables robust self-contained power node.

Pinout & Package

AP6508FE-7 is housed in a RoHS-compliant Green DFN4030-14 package (4.0mm × 3.0mm × 0.75mm) with an exposed thermal pad optimized for PCB copper pour connection to improve θ_JA (52°C/W) and θ_JC (11°C/W) performance.

Pin/Terminal	Circuit Role	Design Meaning
1 IN	Input supply rail	Accepts 4.5V–21V; requires local 22µF ceramic decoupling placed adjacent to pin.
2–5 SW	Switch node	High-current path connecting internal HS/LS FETs to external inductor; demands wide copper trace and minimal loop area.
6 BST	Bootstrap supply	Connects to SW via 0.1µF ceramic capacitor to generate floating gate drive for HS FET; no external diode needed.
7 EN	Enable control	Active-high logic input (1.3V typ. threshold); supports automatic startup via resistor divider from IN.
8 FB	Feedback sense	Monitors output via resistor divider; 0.807V reference enables precise V_OUT setting and fault detection (PG asserts at 0.9×V_FB).
9 PG	Power Good indicator	Open-drain output asserting high when V_OUT reaches 90% of target; sinks 4mA at 0.4V for system sequencing.
10 SS	Soft-start timing	Internal 10.5µA current source charges external capacitor to ramp reference voltage; default 2ms internal time extendable externally.
11 VCC	Bias regulator output	5V internal LDO powering control circuitry; requires 0.1–0.22µF ceramic decoupling; max 0.22µF capacitance specified.
12–13 GND	Power ground	Primary return for power stage; must be connected to PCB ground plane with multiple vias for low-impedance path.
14 AGND	Analog ground	Separate reference for feedback and error amplifier; tied to GND at single point near IC to minimize noise coupling.

Key Features

Feature	Design Value
Integrated HS/LS MOSFETs	R_DS(ON) = 120 mΩ / 20 mΩ eliminates external power switches and reduces BOM count and layout complexity.
Internal Compensation	50pF/200kΩ RC network removes need for external compensation components, simplifying design and improving reliability.
Power Good (PG) Output	Open-drain flag with 20µs delay ensures reliable system power sequencing and fault reporting without external logic.
External Soft-Start	10.5µA current source allows precise control of output ramp rate to prevent inrush current and overshoot during startup.
Fold-Back Frequency Protection	Reduces switching frequency to 150kHz when FB drops to 300mV, limiting peak current to 70% and preventing thermal runaway under short-circuit.

Applications

Gaming Console Core Rail

Smart TV Main Logic Supply

Use Scenario: Powers ARM-based application processor cores (e.g., Amlogic S905X) requiring tightly regulated 1.2V/1.8V at up to 3A with fast transient response.

IC Role / Device Role / Timing Role: Primary synchronous buck regulator delivering clean, sequenced core voltage with PG confirmation before SoC boot.

Use Value: 93% efficiency minimizes thermal load on compact stacked PCBs; current-mode control maintains <±2% regulation during GPU load bursts.

Use Scenario: Supplies main SoC and DDR memory interface in 4K UHD TVs where EMI-sensitive video processing coexists with high-current digital loads.

IC Role / Device Role / Timing Role: Fixed-frequency (500kHz) buck converter providing stable 3.3V/5V rails with low output ripple (<15mV_pp) and controlled start-up timing.

Use Value: Integrated MOSFETs and internal compensation reduce component count by ≥4 vs. controller+external FET solutions, easing layout in narrow edge bezels.

Set-Top Box Distributed Power

Home Audio DSP Power Node

Use Scenario: Generates isolated 1.2V and 2.5V rails from 12V input in compact STB enclosures with limited airflow and strict thermal budgets.

IC Role / Device Role / Timing Role: High-efficiency synchronous buck delivering 3A continuous load with thermal shutdown (140°C) and UVLO (4.2V) for unattended operation.

Use Value: DFN4030-14 package with exposed pad achieves 52°C/W θ_JA, enabling full 3A output without heatsink in 70°C ambient environments.

Use Scenario: Powers high-performance audio DSPs (e.g., TI TAS5805M) requiring ultra-low-noise 1.8V supply with rapid load-step response for real-time audio processing.

IC Role / Device Role / Timing Role: Current-mode buck regulator with 200kHz effective bandwidth ensuring <5µs recovery from 1.5A→3A load transients.

Use Value: Internal slope compensation and fast EA response eliminate need for external compensation, reducing layout sensitivity to parasitic inductance.

Equivalent & Alternatives

The following parts are listed as comparable options for similar synchronous buck converter applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
MP2315DJ-LF-Z	4.5V–28V input, 3A, 500kHz, R_DS(ON) = 95/45 mΩ, no PG pin, 1.2V ref	Lacks Power Good output and has higher LS R_DS(ON); requires external sequencing logic	Select when PG is unnecessary and lower quiescent current (250µA) is prioritized over fault reporting.
TPS54331DR	3.5V–28V input, 3A, adjustable freq (100kHz–2.5MHz), external FETs, 0.8V ref	Requires external high/low-side MOSFETs and compensation network; offers frequency flexibility but higher BOM count	Select when design requires programmable switching frequency or operation below 4.5V input.

Compared with MP2315DJ-LF-Z and TPS54331DR, AP6508FE-7 delivers integrated PG signaling and lower total solution size due to monolithic FETs and internal compensation - making it optimal for space-constrained consumer electronics where sequencing and reliability are critical.

Availability

AP6508FE-7 is available at Aetrix Electronics and suitable for gaming console power delivery, smart TV main logic supplies, and set-top box distributed power systems requiring stable component supply across multi-year production cycles.

Supply support for AP6508FE-7 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 semiconductor company specializing in discrete, analog, and mixed-signal devices for power management, signal integrity, and connectivity applications.

The AP6508FE-7 belongs to Diodes' high-efficiency synchronous buck converter product line, designed specifically for cost-sensitive, space-constrained consumer electronics requiring integrated power solutions with minimal external components.

FAQ

What is the minimum recommended input voltage for reliable operation of AP6508FE-7?

The AP6508FE-7 has a guaranteed operating range starting at 4.5V, with an under-voltage lockout (UVLO) rising threshold of 4.2V (typical). Below 4.5V, the internal 5V VCC regulator cannot sustain proper biasing, causing output voltage droop and potential instability. Operation below 4.5V is outside the recommended conditions and not characterized for performance or reliability.

How does the Power Good (PG) pin behave during startup and fault conditions?

The PG pin remains low during soft-start and asserts high only after the output reaches 90% of its target voltage and remains stable. It pulls low again if FB falls below 70% of V_FB (0.7×0.807V ≈ 0.565V), indicating undervoltage or overload. PG is open-drain and requires an external pull-up resistor; it can sink up to 4mA at 0.4V when de-asserted.

Can AP6508FE-7 operate without an external soft-start capacitor?

Yes - AP6508FE-7 includes an internal soft-start timer (2ms typical) that functions without any external capacitor. The SS pin is optional: connecting a capacitor extends the ramp time linearly (T_SS = C_SS × 0.095V/µs), useful for systems requiring slower voltage ramps to avoid inrush or sequencing conflicts.

What thermal derating guidance applies when using AP6508FE-7 at 3A continuous load?

At 3A continuous load with 12V input and 5V output, junction temperature rise is ~78°C above ambient (using θ_JA = 52°C/W and P_D ≈ 1.5W). To stay below the 140°C thermal shutdown threshold, ambient temperature must remain ≤62°C. For sustained 3A operation in >60°C environments, increase copper area under the exposed pad and add ≥4 thermal vias to inner ground layers.

AP6508FE-7 Specifications

Product attributes: Attribute value

Manufacturer:: Diodes Incorporated

Series:: -

Package/Case:: 14-UFDFN Exposed Pad

Packaging:: Tape & Reel (TR)

Product Status:: Obsolete

Function:: Step-Down

Output Configuration:: Positive

Topology:: Buck

Output Type:: Adjustable

Number of Outputs:: 1

Voltage - Input (Min):: 4.5V

Voltage - Input (Max):: 21V

Voltage - Output (Min/Fixed):: 0.807V

Voltage - Output (Max):: 15V

Current - Output:: 3A

Frequency - Switching:: 500kHz

Synchronous Rectifier:: Yes

Operating Temperature:: -40°C ~ 85°C (TA)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: DFN4030-14

AP6508FE-7 FAQ

1.How can I place an order for AP6508FE-7 through Aetrix?

Please submit a Request for Quotation (RFQ) for AP6508FE-7 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 AP6508FE-7 reliable?

The price and inventory of AP6508FE-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP6508FE-7 is usually 5 days.

3.What payment methods are accepted for AP6508FE-7?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP6508FE-7 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for AP6508FE-7?

AP6508FE-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your AP6508FE-7 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 AP6508FE-7?

For technical support, including AP6508FE-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP6508FE-7 requirements.

6.How does Aetrix verify that AP6508FE-7 is sourced from the original manufacturer or authorized distributors?

All AP6508FE-7 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 AP6508FE-7 meets industry standards.

7.What is the process for return or replacement of AP6508FE-7?

All AP6508FE-7 units undergo pre-shipment inspection (PSI). If there is an issue with AP6508FE-7, 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 AP6508FE-7 part is unused and in its original packaging.

Return procedure for AP6508FE-7:

1.Submit a request within 90 days.

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

Tech Hub

2026-09-03 Logic Level Shifter: How to Connect 3.3V and 5V Logic Safely

A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.

2026-09-03 74HC595 vs TPIC6B595: Output Drive, Pinout, Current, and Load Selection

The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…

2026-09-01 74HC595 Pinout, Timing, Output Current, and Applications

The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…

2026-09-01 Latch vs Flip-Flop: Timing, Differences and Design Choices

A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…

2026-08-30 D Latch Circuit: Truth Table, Timing, ICs and Applications

A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …

2026-08-28 SR Latch Explained: NOR and NAND Circuits, Truth Tables, and Applications

An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…

2026-08-27 Latch Circuit: SR and D Latches, Truth Tables, Timing, and Applications

Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…

2026-08-21 What Is an LED Driver? Types, Circuits, Dimming, and Selection

An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…

2026-08-18 Operational Amplifier (Op Amp): Basics, Configurations, Feedback and Applications

Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…

2026-08-14 Jumper Cables: How to Use, Connect and Choose Them Safely

Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…