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Diodes Incorporated AP3211HKTR-G1
- Part No.:
- AP3211HKTR-G1
- Manufacturer:
- Diodes Incorporated
- Package:
- SOT-23-6
- Datasheet:
-
AP3211HKTR-G1.pdf
- Description:
- IC REG BUCK ADJ 1.5A SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:3,208
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Product details
Overview
AP3211HKTR-G1 from BCD Semiconductor is a 1.4 MHz fixed-frequency, current-mode asynchronous buck DC-DC converter with integrated 0.385 Ω N-channel MOSFET, supporting 4.5–23 V input and delivering up to 1.5 A output at 92% peak efficiency for compact power rails in LCD TV and portable DVD systems.
For engineers reviewing the AP3211HKTR-G1 datasheet, AP3211HKTR-G1 pinout, AP3211HKTR-G1 application, or AP3211HKTR-G1 equivalent, key selection criteria include bootstrap-enabled high-side switch operation, 0.81 V ±2.5% feedback reference, 1.5 A current limit, thermal shutdown at 160 °C, and SOT-23-6 footprint compatibility with standard 4.7 µH inductors.
Technical Context
The AP3211HKTR-G1 implements current-mode PWM control with internal ramp generation and cycle-by-cycle overcurrent protection, enabling fast load transient response and hiccup-mode short-circuit recovery. Its dual-frequency oscillator (1.4 MHz normal / 460 kHz short-circuit) dynamically adjusts switching to maintain regulation under fault conditions.
Bootstrap gate drive architecture supports high-side NMOS switching without external high-voltage bias circuitry; the BS–SW capacitor sustains gate voltage during high-duty-cycle operation. Feedback loop stability is ensured by internal compensation referenced to a precision 0.81 V bandgap voltage.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Switching Frequency | 1.4 MHz (typical); enables use of small 4.7 µH inductors and low-ESR ceramic output capacitors |
| Feedback Voltage | 0.810 V ±2.5%; sets output voltage via external resistor divider (e.g., 3.3 V with 16.2 kΩ/49.9 kΩ) |
| Input Voltage Range | 4.5 V to 23 V; supports wide-input industrial and consumer DC rails including 12 V nominal systems |
| Output Current | 1.5 A continuous; limited to 1.8–2.4 A peak for overcurrent protection and thermal management |
| Efficiency | Up to 92% at 12 VIN/3.3 VOUT/1 A; minimizes heat dissipation in space-constrained SOT-23-6 package |
| Quiescent Current | 0.8–1.1 mA (active), 0.1–1.0 µA (shutdown); extends battery life in always-on or standby subsystems |
| Soft-start Time | 200 µs; prevents inrush current and output overshoot during power-up sequencing |
Pinout & Package
The AP3211HKTR-G1 is housed in a RoHS-compliant, green SOT-23-6 package (3.1 × 2.8 mm, 1.45 mm height) with exposed pad for thermal enhancement and standard surface-mount reflow compatibility.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (BS) | Bootstrap supply | Connects external 10 nF capacitor to SW; provides gate drive voltage for internal high-side NMOS switch |
| 2 (GND) | Power ground | Common return path for IC core, power switch, and feedback network; requires low-impedance PCB pour |
| 3 (FB) | Voltage feedback | Senses output via resistor divider; triggers OVP if >0.972 V and reduces frequency to 460 kHz if <0.25 V |
| 4 (EN) | Enable control | Active-high logic input; enables IC when >1.5 V, disables with <0.4 V, drawing <1 µA in shutdown |
| 5 (IN) | Power input | Accepts 4.5–23 V DC; requires local 10 µF/25 V input capacitor to suppress ripple and transients |
| 6 (SW) | Switch node | Drives external inductor and bootstrap capacitor; swings between IN and GND; connects to Schottky catch diode anode |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 0.385 Ω N-MOSFET | Reduces external component count and conduction losses; eliminates need for discrete high-side switch and driver |
| Current-mode PWM control | Provides inherent cycle-by-cycle current limiting and stable loop response without external compensation |
| Multi-protection suite | Combines thermal shutdown (160 °C), UVLO (3.3–4.3 V), OVP (0.972 V FB threshold), and hiccup-mode short-circuit recovery |
| Bootstrap gate drive | Enables efficient high-side NMOS operation using only one external capacitor-no charge pump or auxiliary supply required |
Applications
| LCD TV Power Rails | Portable DVD Player Core Supply |
|---|---|
Use Scenario: Generating 3.3 V/1.5 A main logic rail from 12 V DC input in slim-panel LCD TVs. IC Role / Device Role / Timing Role: Asynchronous buck controller managing power conversion with integrated switch and bootstrap gate drive. Use Value: Delivers 92% efficiency at full load in SOT-23-6, reducing board area and thermal design complexity versus discrete solutions. | Use Scenario: Providing regulated 3.3 V supply to MPEG decoder and display driver in battery-powered DVD players. IC Role / Device Role / Timing Role: Primary step-down regulator with soft-start and low-quiescent shutdown for battery longevity. Use Value: 0.1 µA shutdown current and 200 µs soft-start prevent brownout during wake-up and extend runtime per charge cycle. |
| Digital Photo Frame (DPF) System Power | Set-Top Box Auxiliary Rail |
Use Scenario: Converting 12 V wall adapter output to 3.3 V for ARM-based media processor and TFT interface in DPFs. IC Role / Device Role / Timing Role: Fixed-frequency current-mode buck converter with EN-controlled sequencing and feedback-based OVP. Use Value: 1.4 MHz switching allows compact 4.7 µH inductor and 22 µF ceramic output cap-critical for ultra-thin form factors. | Use Scenario: Supplying 3.3 V to HDMI PHY and IR receiver in low-power STB standby mode. IC Role / Device Role / Timing Role: Always-on auxiliary regulator with UVLO hysteresis (0.2 V) and thermal foldback for reliability. Use Value: Stable 0.81 V reference and ±2.5% tolerance ensure consistent logic-level compliance across temperature (-40 to +85 °C). |
Equivalent & Alternatives
The following parts are listed as comparable options for similar asynchronous buck converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AP3211KTR-G1 | Same die, identical electrical specs; differs only in tape-and-reel packaging (TR vs HKTR) and marking code | No functional difference; both support same SOT-23-6 layout and thermal profile | Select based on procurement channel preference-HKTR denotes green tape-and-reel with GBK packing type |
| AP5100KTR-G1 | Higher 2 A output rating, 500 kHz/1 MHz dual-frequency option, and enhanced thermal performance (θJA = 180 °C/W) | Better suited for higher-current or thermally constrained designs where 1.5 A margin is insufficient | Choose when upgrading from AP3211H for increased load headroom or improved thermal derating at ambient >70 °C |
Compared with AP3211HKTR-G1, AP3211KTR-G1 offers identical functionality in alternate packaging, while AP5100KTR-G1 delivers higher current capability and lower thermal resistance-making it suitable for next-generation designs requiring scalability beyond 1.5 A.
Availability
AP3211HKTR-G1 is available at Aetrix Electronics and suitable for LCD TV power rails, portable DVD player core supplies, and digital photo frame system power requiring stable component supply, RoHS-compliant green packaging, and SOT-23-6 footprint continuity.
Supply support for AP3211HKTR-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 power management solutions.
The AP3211H product line targets cost-sensitive, space-constrained consumer electronics with integrated MOSFET buck regulators optimized for 3.3 V/5 V system rails in LCD displays and portable media devices.
FAQ
What is the function of the BS pin on AP3211HKTR-G1?
The BS (Bootstrap) pin connects to an external 10 nF capacitor tied to the SW pin and provides gate drive voltage for the internal high-side N-MOSFET. It enables efficient synchronous-like operation without requiring a separate high-voltage bias supply, and must be routed with minimal trace inductance to sustain gate voltage during high-duty-cycle conditions.
Does AP3211HKTR-G1 require an external Schottky diode?
Yes-AP3211HKTR-G1 is an asynchronous buck converter and requires an external Schottky diode (cathode to VOUT, anode to SW) to provide the freewheeling path during the low-side conduction phase. The datasheet specifies a 1 A Schottky with low forward voltage (e.g., 1N5819 or equivalent) for optimal efficiency and thermal performance.
How does the AP3211HKTR-G1 respond during output short-circuit events?
Under short-circuit, the AP3211HKTR-G1 reduces switching frequency from 1.4 MHz to 460 kHz and enters hiccup-mode protection: it attempts periodic restarts after thermal recovery, limiting average power dissipation and preventing device damage. This behavior is triggered when FB voltage falls below 0.25 V, confirmed in Figure 12 and Figure 13 of the datasheet.
Can AP3211HKTR-G1 be used with input voltages below 4.5 V?
No-the absolute minimum recommended input voltage is 4.5 V per the datasheet's Recommended Operating Conditions. Below this, UVLO remains active (VUVLO rising threshold = 3.3–4.3 V), and the IC will not start or may drop out of regulation. Operation at 4.2 V or lower is outside specification and risks unstable switching or failure to enable.
AP3211HKTR-G1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- SOT-23-6
- 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):
- 23V
- Voltage - Output (Min/Fixed):
- 0.81V
- Voltage - Output (Max):
- 20.7V
- Current - Output:
- 1.5A
- Frequency - Switching:
- 1.4MHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-6
AP3211HKTR-G1 FAQ
1.How can I place an order for AP3211HKTR-G1 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP3211HKTR-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 AP3211HKTR-G1 reliable?
The price and inventory of AP3211HKTR-G1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP3211HKTR-G1 is usually 5 days.
3.What payment methods are accepted for AP3211HKTR-G1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP3211HKTR-G1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP3211HKTR-G1?
AP3211HKTR-G1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP3211HKTR-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 AP3211HKTR-G1?
For technical support, including AP3211HKTR-G1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP3211HKTR-G1 requirements.
6.How does Aetrix verify that AP3211HKTR-G1 is sourced from the original manufacturer or authorized distributors?
All AP3211HKTR-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 AP3211HKTR-G1 meets industry standards.
7.What is the process for return or replacement of AP3211HKTR-G1?
All AP3211HKTR-G1 units undergo pre-shipment inspection (PSI). If there is an issue with AP3211HKTR-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 AP3211HKTR-G1 part is unused and in its original packaging.
Return procedure for AP3211HKTR-G1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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