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Diodes Incorporated AP3513EMPTR-G1
- Part No.:
- AP3513EMPTR-G1
- Manufacturer:
- Diodes Incorporated
- Package:
- 8-SOIC (0.154", 3.90mm Width) Exposed Pad
- Datasheet:
-
AP3513EMPTR-G1.pdf
- Description:
- IC REG BUCK ADJ 3A 8SO
- Quantity:
- Payment:
- Shipping:
Inventory:2,346
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Product details
Overview
AP3513EMPTR-G1 from Diodes Incorporated is a 500kHz fixed-frequency, current-mode PWM synchronous buck DC-DC converter in SO-8EP package, delivering up to 3A output current with input range 4.5V–18V. It integrates low-RDS(ON) N-channel MOSFETs, features programmable soft-start, hiccup-mode short-circuit protection, and operates across –40°C to +85°C ambient for monitor/STB power rails.
For engineers reviewing the AP3513EMPTR-G1 datasheet, AP3513EMPTR-G1 pinout, AP3513EMPTR-G1 application, or AP3513EMPTR-G1 equivalent, key selection criteria include its 0.925V feedback reference, 100mΩ high-side RDS(ON), thermal shutdown at +160°C, and SO-8EP thermal resistance of 60°C/W - critical for compact 3.3V/5V point-of-load designs.
Technical Context
The AP3513E uses peak current-mode control with internal slope compensation to ensure stability across duty cycles up to 90%, enabling fast load transient response without external compensation complexity. Its transconductance error amplifier (800 µA/V) interfaces directly with the COMP pin for loop tuning via RC networks.
Protection architecture includes independent comparators for FB overvoltage (1.1V threshold), short-circuit detection (0.3V FB underload triggering 180kHz hiccup mode), and thermal shutdown with 30°C hysteresis - all implemented in analog hardware without microcontroller dependency.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5V to 18V - supports 5V, 12V, and 15V intermediate bus architectures without pre-regulation. |
| Output Current | 3A continuous - sufficient for powering SoC cores, DDR memory, or FPGA I/O banks in consumer electronics. |
| Switching Frequency | Fixed 500kHz (±18%) - enables use of compact 4.7µH inductors and reduces EMI filtering burden vs. lower-frequency converters. |
| Feedback Reference | 0.925V ±1.8% - sets output voltage via resistor divider; 1.1V OVLO threshold provides 20% headroom for 3.3V rail. |
| RDS(ON) (High-Side) | 100mΩ max - limits conduction loss to ≤0.9W at 3A, supporting >90% efficiency at mid-load in typical 12V→3.3V designs. |
| Thermal Shutdown | +160°C junction with +30°C hysteresis - prevents latch-up during sustained overload while allowing recovery after cooling. |
| Soft-Start Time | 15ms with 0.1µF SS-to-GND capacitor - controls inrush current during power-up to avoid input rail droop. |
Pinout & Package
AP3513EMPTR-G1 is housed in an SO-8EP (exposed pad) package measuring 4.9mm × 6.0mm × 1.75mm, with θJA = 60°C/W. The exposed pad (EP) must be soldered to a thermal pad on PCB for effective heat dissipation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 BS | Bootstrap supply | Connects external bootstrap capacitor to SW; generates gate drive voltage for high-side NMOS switch. |
| 2 IN | Main power input | Accepts 4.5–18V; requires local 2×10µF ceramic decoupling to suppress ripple and ESR-related instability. |
| 3 SW | Power switch node | Drives external inductor; carries high di/dt switching current - demands tight layout with minimal trace inductance. |
| 4 GND | Analog/digital ground | Reference for FB, COMP, EN, SS; must tie to power ground via low-inductance path near EP. |
| 5 FB | Voltage feedback sense | Monitors output via resistor divider; 0.925V reference enables precise 3.3V/5V/12V regulation. |
| 6 COMP | Error amplifier output | Loop compensation node - connect RC network to GND to stabilize phase margin across load/transient conditions. |
| 7 EN | Enable control | Logic-level input (1.1–2.7V thresholds); pull-up to VIN with 100kΩ for automatic startup. |
| 8 SS | Soft-start timing | Capacitor-to-GND sets ramp time; 0.1µF yields 15ms - prevents output overshoot and inrush stress. |
| EP | Thermal pad | Must be connected to PCB ground plane; accounts for >70% of total heat transfer in SO-8EP package. |
Key Features
| Feature | Design Value |
|---|---|
| Current-mode PWM control | Enables cycle-by-cycle current limiting and <10µs transient response to 1A load steps without external compensation. |
| Hiccup-mode short-circuit protection | Shuts down SW for 64ms upon FB <0.3V, then retries - prevents thermal runaway during sustained output shorts. |
| Integrated 100mΩ MOSFETs | Eliminates need for external high-side/low-side switches, reducing BOM count and board area by ≥30% vs. controller-only solutions. |
| Programmable soft-start | Adjustable 0–100ms ramp via SS capacitor - avoids input capacitor stress and system brownout during cold start. |
| RoHS-3 & halogen-free compliance | Meets EU Directive 2015/863/EU with Br+Cl <1500ppm and Sb <1000ppm - required for CE-marked consumer electronics. |
Applications
| Monitor Power Supply | Set-Top Box Core Rail |
|---|---|
Use Scenario: Provides stable 3.3V/5V to LCD controller, HDMI PHY, and audio DAC in 24/7-operated flat-panel monitors. IC Role / Device Role / Timing Role: Primary synchronous buck regulator managing intermediate bus conversion from 12V adapter output. Use Value: High light-load efficiency (>85% at 10mA) extends panel standby battery life; SO-8EP thermal performance sustains reliability at 70°C ambient. | Use Scenario: Powers ARM-based SoC and DDR3 memory in cable/satellite STBs with variable streaming workloads. IC Role / Device Role / Timing Role: Point-of-load regulator delivering 3A peak current during video decode bursts. Use Value: Fast transient response (<50µs settling) prevents SoC reset during 0.2A→2.5A load steps; hiccup protection isolates faults without system reboot. |
| TV Mainboard DC-DC | Datacom Interface Module |
Use Scenario: Generates 5V rail for USB peripherals, IR receivers, and tuner modules in smart TVs with multiple power domains. IC Role / Device Role / Timing Role: Secondary buck converter fed from main 12V supply, regulated via FB divider for ±1% accuracy. Use Value: 0.925V reference tolerance ensures consistent 5.0V output across temperature (–40°C to +85°C); UVLO prevents erratic startup below 4.0V. | Use Scenario: Supplies 3.3V to Ethernet PHY, USB hub, and management MCU in enterprise datacom modules. IC Role / Device Role / Timing Role: Compact, thermally robust DC-DC stage meeting IPC-2221 Class B spacing requirements. Use Value: SO-8EP package allows placement under heatsink-less metal shields; 60°C/W θJA enables 3A operation at 65°C board temperature. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MP2315DJ-LF-Z | 4.5–24V input, 3A, 500kHz, but lacks hiccup-mode SCP and has higher 120mΩ RDS(ON). | Requires external OVLO circuitry for 3.3V rail safety; less suitable for unattended STB deployments. | Select when wider input range (up to 24V) is needed and hiccup protection is non-critical. |
| TPS54331DR | 3.5–28V input, 3A, adjustable frequency (100kHz–2.5MHz), but uses external MOSFETs and needs more compensation components. | Higher design complexity and BOM cost; better for custom EMI profiles or ultra-low IQ requirements. | Select when frequency tuning or ultra-low quiescent current (<100µA) is mandatory for battery-backed systems. |
Compared with MP2315DJ-LF-Z and TPS54331DR, AP3513EMPTR-G1 delivers integrated protection (hiccup SCP, OVLO, UVLO) and lower RDS(ON) in a simpler 8-pin layout - reducing design risk and validation time for cost-sensitive consumer power supplies.
Availability
AP3513EMPTR-G1 is available at Aetrix Electronics and suitable for monitor, set-top box, and datacom interface applications requiring stable component supply, RoHS-3 compliance, and SO-8EP thermal performance.
Supply support for AP3513EMPTR-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
Diodes Incorporated is a global manufacturer of discrete semiconductors and ICs, specializing in power management, signal integrity, and protection devices for consumer, industrial, and automotive markets.
The AP3513E belongs to Diodes' high-efficiency synchronous buck converter product line, designed specifically for compact, thermally constrained 3A point-of-load applications in consumer electronics with strict cost and footprint targets.
FAQ
What is the minimum recommended input capacitance for AP3513EMPTR-G1?
Diodes specifies two 10µF X5R/X7R ceramic capacitors (2×10µF) at the IN pin, placed as close as possible to pins 2 and 4. This minimizes high-frequency switching noise and prevents input voltage sag during 3A load transients. Use low-ESR types with rated voltage ≥25V to handle 18V max input and ripple current.
Can AP3513EMPTR-G1 operate without the bootstrap capacitor?
No - the BS pin requires a 0.1µF ceramic capacitor between BS and SW to charge the high-side gate driver. Omitting it disables the upper MOSFET, causing immediate failure. The capacitor must be rated for ≥16V and placed within 2mm of pins 1 and 3 to maintain gate drive integrity during 500kHz switching.
How does the AP3513E implement short-circuit protection?
When FB voltage drops below 0.3V (indicating severe overload or short), the internal comparator forces oscillator frequency reduction to 180kHz and enters hiccup mode: SW is disabled for 64ms, then re-enabled briefly. This cycle repeats until fault clears, limiting average power dissipation to safe levels without requiring external current-sense resistors.
Is AP3513EMPTR-G1 qualified for automotive applications?
No - AP3513EMPTR-G1 is specified for industrial/consumer temperature range (–40°C to +85°C) and is not AEC-Q100 qualified. Diodes offers automotive-grade variants (e.g., AP3513EQA) with PPAP documentation, IATF 16949 manufacturing, and extended temperature screening - contact Diodes sales for those part numbers.
AP3513EMPTR-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
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 4.5V
- Voltage - Input (Max):
- 18V
- Voltage - Output (Min/Fixed):
- 0.925V
- Voltage - Output (Max):
- 16.2V
- 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:
- 8-SO-EP
AP3513EMPTR-G1 FAQ
1.How can I place an order for AP3513EMPTR-G1 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP3513EMPTR-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 AP3513EMPTR-G1 reliable?
The price and inventory of AP3513EMPTR-G1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP3513EMPTR-G1 is usually 5 days.
3.What payment methods are accepted for AP3513EMPTR-G1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP3513EMPTR-G1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP3513EMPTR-G1?
AP3513EMPTR-G1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP3513EMPTR-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 AP3513EMPTR-G1?
For technical support, including AP3513EMPTR-G1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP3513EMPTR-G1 requirements.
6.How does Aetrix verify that AP3513EMPTR-G1 is sourced from the original manufacturer or authorized distributors?
All AP3513EMPTR-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 AP3513EMPTR-G1 meets industry standards.
7.What is the process for return or replacement of AP3513EMPTR-G1?
All AP3513EMPTR-G1 units undergo pre-shipment inspection (PSI). If there is an issue with AP3513EMPTR-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 AP3513EMPTR-G1 part is unused and in its original packaging.
Return procedure for AP3513EMPTR-G1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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