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Diodes Incorporated AP3408DNTR-G1
- Part No.:
- AP3408DNTR-G1
- Manufacturer:
- Diodes Incorporated
- Package:
- 10-WFDFN Exposed Pad
- Datasheet:
-
AP3408DNTR-G1.pdf
- Description:
- IC REG BUCK ADJ 2A 10DFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,525
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Product details
Overview
AP3408DNTR-G1 from BCD Semiconductor is a current-mode PWM synchronous buck DC/DC converter delivering 2A output with up to 95% efficiency, programmable switching frequency (300kHz–4MHz), and integrated low-RDS(ON) P- and N-channel MOSFETs. It operates from 2.6V–5.5V input, supports 0.8V–5V adjustable output, and features 100% duty cycle for Li-ion battery-powered portable media players and digital cameras.
For engineers reviewing the AP3408DNTR-G1 datasheet, AP3408DNTR-G1 pinout, AP3408DNTR-G1 application, or AP3408DNTR-G1 equivalent, key selection considerations include its DFN-3×3-10 package, internal soft-start, power-good monitoring, thermal shutdown, and synchronization capability with external clock signals.
Technical Context
The AP3408 employs peak current-mode control with an internal 0.8V ±2% reference and error amplifier driving a PWM comparator. Its oscillator supports resistor-programmed or externally synchronized operation, enabling precise frequency alignment in multi-rail systems.
It integrates dual power switches (P-FET RDS(ON) = 0.11–0.16Ω, N-FET RDS(ON) = 0.11–0.17Ω) and includes built-in over-current protection, thermal shutdown at 160°C with 20°C hysteresis, and UVLO with 2.2V threshold and 300mV hysteresis.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.6V–5.5V: Supports single-cell Li-ion (2.7–4.2V) and USB-powered systems without external LDO pre-regulation. |
| Output Current | 2A continuous: Sustains full load under worst-case thermal conditions (θJA = 110°C/W in DFN-3×3-10). |
| Switching Frequency | 300kHz–4MHz: Enables compact LC filter design; 4MHz operation allows ≤1µH inductors and 10µF ceramic output capacitors. |
| Feedback Reference | 0.8V ±2%: Sets output voltage via external resistor divider; enables accurate 1.2V, 1.8V, 3.3V, or 5V regulation with <±0.2% load regulation. |
| Efficiency | Up to 95%: Achieved at mid-load (1A) and VIN=3.3V/VOUT=2.5V, minimizing thermal stress in space-constrained portable PCBs. |
| Power Good Output | Open-drain, ±12.5% window: Asserts logic-low when VOUT deviates >12.5% from target, enabling safe system power sequencing. |
| Soft-start Time | 1.5ms: Controls inrush current during startup; prevents input rail droop and avoids false UVLO triggering. |
Pinout & Package
AP3408DNTR-G1 is packaged in a thermally enhanced DFN-3×3-10 (exposed pad connected to PGND) with 0.5mm pitch and 10 terminals. The exposed thermal pad must be soldered to a dedicated PGND copper area for optimal thermal performance (θJA = 110°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (SHDN/RT) | Oscillator frequency set / Shutdown control | Resistor-to-GND sets fSW; pulled to VDD to disable regulator and reduce IQ to 1µA. |
| 2 (SYNC) | External clock input | Accepts CMOS-level external clock for EMI reduction and multi-phase synchronization. |
| 3 (GND) | Signal ground reference | Reference node for FB, COMP, and internal analog circuitry; connects to PGND at single point. |
| 4 (SW) | Switch node | Drives external inductor; experiences high dv/dt; requires tight layout to minimize EMI and ringing. |
| 5 (PGND) | Power ground return | Low-impedance return path for high di/dt currents from PVDD and SW; connects to exposed pad. |
| 6 (PVDD) | Main power input | Bypassed to PGND with ≥10µF ceramic capacitor; supplies gate drivers and power switches. |
| 7 (VDD) | Logic supply input | Bypassed to GND with ≥1µF ceramic capacitor; powers control circuitry and error amplifier. |
| 8 (PGOOD) | Power-good status indicator | Open-drain output pulled low if VOUT falls outside ±12.5%; requires external pull-up to system rail. |
| 9 (FB) | Output voltage feedback | Inverting input of error amplifier; senses VOUT via resistive divider referenced to 0.8V internal reference. |
| 10 (COMP) | Loop compensation node | Error amplifier output; connects to RC network for Type II/III compensation to ensure stability across load/transient conditions. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated P/N-FET Power Stage | Eliminates external MOSFETs and drivers; reduces BOM count and board area while maintaining 2A capability at high efficiency. |
| Programmable Switching Frequency | Enables optimization between efficiency (lower fSW) and size (higher fSW) without changing IC or layout. |
| 100% Duty Cycle Operation | Permits VOUT ≈ VIN during battery discharge, extending runtime in Li-ion applications down to 2.6V. |
| Built-in Soft-start & Protection | Prevents inrush current damage and ensures reliable startup; includes OCP, OTP (160°C), UVLO, and short-circuit latch-off. |
| Power-Good Monitoring | Provides system-level fault detection and enables coordinated power sequencing with microcontrollers or PMICs. |
Applications
| Portable Media Player | Digital Still Camera |
|---|---|
Use Scenario: Powering SoC core voltage (1.2V) and image sensor I/O (2.8V) from a single 3.7V Li-ion cell. IC Role / Device Role / Timing Role: Primary step-down regulator providing stable, low-noise DC output with fast transient response to burst-mode sensor activity. Use Value: 95% efficiency at 1A extends playback time; 4MHz operation shrinks inductor size by >50% vs. 1MHz designs. | Use Scenario: Supplying CCD/CMOS sensor bias (3.3V), lens motor driver (5V), and memory interface (1.8V) in compact camera modules. IC Role / Device Role / Timing Role: Dual-output capable via external feedback dividers; supports independent voltage rails with shared thermal management. Use Value: 100% duty cycle maintains regulated output as battery discharges below 3.3V; PGOOD enables safe sensor reset on undervoltage. |
| Notebook Subsystem | USB-Powered Peripheral |
Use Scenario: Generating 1.05V for DDR3 memory termination and 1.8V for display interface in ultra-thin notebook add-on cards. IC Role / Device Role / Timing Role: High-density point-of-load regulator with minimal external components and DFN-3×3 footprint. Use Value: DFN-3×3-10 package fits tight spacing constraints; low RDS(ON) FETs limit temperature rise to <30°C at 2A ambient. | Use Scenario: Converting 5V USB input to 3.3V for MCU, BLE radio, and sensors in portable diagnostic tools. IC Role / Device Role / Timing Role: Input-capable buck converter with UVLO and thermal protection for unregulated bus-powered operation. Use Value: 2.6V minimum input supports brownout tolerance; SYNC pin allows EMI alignment with host USB frame timing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MP2143DJ-LF-Z (Monolithic Power) | Fixed 2.2MHz fSW, no SYNC pin, 1.2A max output, smaller DFN-8 package | Limited to lower-current peripherals; lacks frequency flexibility and external sync for noise-sensitive systems | Select when board space is critical and 1.2A suffices; avoid for 2A Li-ion systems requiring programmable fSW. |
| TPS62231DRVR (Texas Instruments) | 3MHz fixed fSW, 0.6V reference, 600mA output, integrated compensation | Targeted at ultra-low-power microcontroller rails; insufficient current for camera or media SoCs | Choose only for sub-600mA loads where TI's precision 0.6V ref and auto-skip mode improve light-load efficiency. |
Compared with MP2143DJ-LF-Z and TPS62231DRVR, AP3408DNTR-G1 uniquely delivers 2A output with programmable 300kHz–4MHz switching, 100% duty cycle, and full protection suite - making it the only fit for high-current, battery-critical portable applications demanding both flexibility and robustness.
Availability
AP3408DNTR-G1 is available at Aetrix Electronics and suitable for portable media players, digital still/video cameras, and notebook subsystems requiring stable component supply, RoHS-compliant green packaging, and long-term industrial temperature support (–40°C to +125°C).
Supply support for AP3408DNTR-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 Shanghai-based analog and power IC designer specializing in high-efficiency DC/DC converters, LED drivers, and mixed-signal solutions for consumer and industrial markets.
The AP3408 belongs to BCD's high-frequency synchronous buck converter product line, engineered specifically for space-constrained, battery-powered portable electronics requiring wide input range, high efficiency, and robust thermal performance.
FAQ
What is the maximum recommended output current for AP3408DNTR-G1 in DFN-3×3-10 package?
The AP3408DNTR-G1 is rated for 2A continuous output current under recommended operating conditions (TA ≤ 85°C, proper PCB thermal design). At 125°C junction temperature, current derating applies per thermal resistance (θJA = 110°C/W); sustained 2A operation requires ≥200mm² exposed PGND copper area with 2oz copper weight.
Can AP3408DNTR-G1 operate with input voltage below 2.6V?
No - the absolute minimum input voltage is 2.6V per Recommended Operating Conditions. Below this, UVLO activates (threshold = 2.2V with 300mV hysteresis), disabling regulation. Operation below 2.6V risks unstable output, undefined protection behavior, and potential damage due to insufficient gate drive for internal MOSFETs.
How is the switching frequency set using the SHDN/RT pin?
Connect a resistor RT from SHDN/RT (Pin 1) to GND. Frequency scales inversely with RT: fSW ≈ 1.2MHz × (330kΩ / RT). For example, RT = 165kΩ yields ~2.4MHz. Leaving SHDN/RT open or pulling to VDD disables the device; do not float this pin.
Is external compensation required for stable operation?
Yes - the COMP pin (Pin 10) requires external Type II or Type III compensation network (typically RC + C) connected between COMP and FB. The datasheet provides design equations and typical values based on selected inductor and output capacitor; omitting compensation causes oscillation or poor transient response.
AP3408DNTR-G1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- 10-WFDFN 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):
- 2.6V
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 0.8V
- Voltage - Output (Max):
- 5V
- Current - Output:
- 2A
- Frequency - Switching:
- 300kHz ~ 4MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 10-DFN (3x3)
AP3408DNTR-G1 FAQ
1.How can I place an order for AP3408DNTR-G1 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP3408DNTR-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 AP3408DNTR-G1 reliable?
The price and inventory of AP3408DNTR-G1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP3408DNTR-G1 is usually 5 days.
3.What payment methods are accepted for AP3408DNTR-G1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP3408DNTR-G1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP3408DNTR-G1?
AP3408DNTR-G1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP3408DNTR-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 AP3408DNTR-G1?
For technical support, including AP3408DNTR-G1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP3408DNTR-G1 requirements.
6.How does Aetrix verify that AP3408DNTR-G1 is sourced from the original manufacturer or authorized distributors?
All AP3408DNTR-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 AP3408DNTR-G1 meets industry standards.
7.What is the process for return or replacement of AP3408DNTR-G1?
All AP3408DNTR-G1 units undergo pre-shipment inspection (PSI). If there is an issue with AP3408DNTR-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 AP3408DNTR-G1 part is unused and in its original packaging.
Return procedure for AP3408DNTR-G1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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