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Diodes Incorporated AP3436ADNTR-G1
- Part No.:
- AP3436ADNTR-G1
- Manufacturer:
- Diodes Incorporated
- Package:
- 10-WFDFN Exposed Pad
- Datasheet:
-
AP3436ADNTR-G1.pdf
- Description:
- IC REG BUCK ADJ 3A UDFN303010
- Quantity:
- Payment:
- Shipping:
Inventory:1,580
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Product details
Overview
AP3436ADNTR-G1 from Diodes Incorporated is a 3A, 1.25MHz synchronous buck DC-DC converter with integrated high- and low-side N-channel MOSFETs (50mΩ typ), 0.6V ±1.5% reference voltage, and pulse-skipping modulation (PSM) for light-load efficiency. It operates from 1.3V–5.5V input, delivers adjustable output down to 0.8×VIN, and targets compact power rails in notebook and set-top box applications.
For engineers reviewing the AP3436ADNTR-G1 datasheet, AP3436ADNTR-G1 pinout, AP3436ADNTR-G1 application, or AP3436ADNTR-G1 equivalent, key selection factors include its PSM/PWM dual-mode operation, U-DFN3030-10 thermal performance (θJC = 3°C/W), EN-controlled sequencing, open-drain PGOOD monitoring (75–125% VREF window), and built-in OCP/UVP/OVP/thermal shutdown protections.
Technical Context
The AP3436ADNTR-G1 implements current-mode control with cycle-by-cycle current limiting and internal soft-start (0.8–2ms ramp). Its PWM frequency is fixed at 1.25MHz under heavy load but transitions to variable-frequency PSM at light loads to reduce switching loss.
It integrates dual MOSFETs with matched on-resistance (50mΩ typ each at VBOOT_SW = 5V), uses FB feedback with ±1.5% reference accuracy, and features a dedicated BOOT pin with internal 16Ω charge resistor and 2.2V UVLO relative to SW. The EN pin has 1.6V enable threshold and 0.8V shutdown threshold with 10µs minimum assertion time.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | 3A continuous - supports single-rail CPU core or DDR memory supply without external heatsink |
| Switching Frequency | 1.25MHz nominal (PWM mode); variable in PSM - enables <3mm inductors and compact 44µF input / 88µF output capacitors |
| Reference Voltage | 0.600V ±1.5% - sets output accuracy to ±1.5% over line/load/temperature when using 1% FB resistors |
| MOSFET RDS(on) | 50mΩ high-side & 50mΩ low-side (typ @ 5V) - achieves up to 95% peak efficiency at 3A/1.2V out |
| Input Voltage Range | VIN: 1.3V–5.5V; VCC: 3.0V–5.5V - allows direct use of 3.3V or 5V system rails for bias and power |
| Protection Features | UVLO (2.75V VCC), OCP (7.6A typ), UVP (0.5×VOUT), OVP (1.5×VOUT), thermal shutdown (+160°C) - latched or auto-recover per function |
| Power Good Window | PGOOD active-low when FB is 75–125% of 0.6V - provides reliable system power sequencing with 7% hysteresis |
Pinout & Package
AP3436ADNTR-G1 is housed in a thermally enhanced U-DFN3030-10 package (3.0mm × 3.0mm × 0.75mm) with exposed thermal pad (Pin 11) requiring PCB GND connection for θJC = 3°C/W performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 FB | Voltage feedback input | Connects to output via resistor divider; sets VOUT = 0.6V × (1 + R1/R2); sensitive to noise - requires local 1nF bypass |
| 2 VCC | Analog supply input | Bias rail for control circuitry; must be ≥3.0V; separate from VIN if noise isolation needed (add 4.7Ω series resistor) |
| 3 VIN | Main power input | Supplies power stage; accepts 1.3V–5.5V; connects to input capacitor bank near SW pins |
| 4,5 GND | Ground return | Dual GND pins minimize ground bounce; must connect directly to low-impedance PCB ground plane |
| 6,7 SW | Power switch node | Drives external inductor; carries high di/dt - requires short, wide copper pour and tight loop with VIN/CIN |
| 8 BOOT | High-side gate driver supply | Charged via internal 16Ω resistor from SW; requires 0.1µF ceramic capacitor to SW for bootstrap operation |
| 9 PGOOD | Open-drain power-good indicator | Asserts low when VOUT deviates >25% from target; requires external 3kΩ–100kΩ pull-up to ≤5V rail |
| 10 EN | Enable control input | Active-high logic; 1.6V min to enable, 0.8V max to disable for ≥10µs; supports sequencing with upstream regulators |
| 11 EP | Exposed thermal pad | Must be soldered to solid GND copper area; primary thermal path - accounts for >90% of heat dissipation |
Key Features
| Feature | Design Value |
|---|---|
| Pulse-skipping modulation (PSM) | Reduces light-load quiescent current to <1µA shutdown and extends battery runtime in always-on consumer systems |
| Integrated dual MOSFETs | Eliminates external high-side/low-side FETs and drivers - reduces BOM count by ≥5 components and layout area by >40% |
| Thermally optimized DFN | 3mm×3mm footprint with 3°C/W junction-to-case resistance - sustains 3A continuous output at +85°C ambient without airflow |
| Robust protection suite | Combines cycle-by-cycle OCP, 65µs-delayed UVP/OVP, and +160°C thermal shutdown with +20°C hysteresis - prevents catastrophic failure during fault conditions |
| Accurate 0.6V reference | ±1.5% tolerance over -40°C to +85°C ensures stable output regulation across industrial temperature range without calibration |
Applications
| Desktop & Notebook Power Rails | Set-Top Box Core Supply |
|---|---|
|
Use Scenario: Regulating 1.2V/3A CPU I/O or DDR termination voltage in space-constrained laptop mainboards. IC Role / Device Role / Timing Role: Primary synchronous buck controller managing dynamic load steps up to 400mA/µs with <±2.5% transient deviation. Use Value: 1.25MHz fixed PWM ensures fast transient response and small passive size; PSM mode cuts no-load power to <400µA. |
Use Scenario: Generating stable 3.3V/2.5A supply for SoC and video processing ASICs in cable/satellite receivers. IC Role / Device Role / Timing Role: Main point-of-load regulator with PGOOD signaling to enable downstream FPGA configuration upon valid rail. Use Value: Integrated OVP/UVP protects sensitive video decoders from overvoltage events; thermal shutdown prevents field failures in sealed enclosures. |
| LCD Display Backlight Driver Bias | CPE Equipment System Rail |
|
Use Scenario: Providing clean 5.0V/1.5A bias for LED driver ICs in 10–24" LCD panels with minimal EMI. IC Role / Device Role / Timing Role: Secondary buck stage stepping down 12V adapter output; uses PSM to maintain low acoustic noise during standby. Use Value: 1.25MHz switching places noise above audio band; soft-start (0.8–2ms) prevents backlight flicker at power-on. |
Use Scenario: Delivering 1.8V/3A system rail for wireless gateway baseband processors and RF front-end ICs. IC Role / Device Role / Timing Role: High-efficiency POL converter supporting burst-mode LTE/Wi-Fi traffic with rapid load transients. Use Value: Current-mode control enables stable operation with ceramic output caps; EN pin synchronizes with baseband power sequencing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MP2451DT-LF-Z (Monolithic Power) | Fixed 2MHz switching, no PSM mode; 2A rated; requires external BOOT capacitor | Lacks light-load efficiency optimization; less suitable for always-on CPE standby modes | Prefer for cost-sensitive designs where 2A output suffices and higher frequency enables smaller magnetics |
| TPS54332DDAR (Texas Instruments) | 3A, 1MHz, Eco-mode™ (similar to PSM); external MOSFETs; larger SOIC-8 package | Higher board area; requires gate driver design and layout expertise | Choose when design flexibility (e.g., custom MOSFET selection or higher VIN >6V) outweighs integration benefits |
Compared with MP2451DT-LF-Z and TPS54332DDAR, AP3436ADNTR-G1 delivers superior light-load efficiency via integrated PSM, eliminates external FETs and drivers, and fits into half the PCB area - making it optimal for ultra-compact, battery-aware consumer electronics.
Availability
AP3436ADNTR-G1 is available at Aetrix Electronics and suitable for desktop & notebook power rails, set-top box core supplies, and CPE equipment system rails requiring stable component supply and long-term lifecycle support.
Supply support for AP3436ADNTR-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 analog ICs, specializing in high-performance power management, signal integrity, and protection solutions for consumer, computing, and industrial markets.
AP3436ADNTR-G1 belongs to Diodes' AP34xx synchronous buck converter family, engineered for high-density, low-noise DC-DC conversion in space- and efficiency-critical portable and networked devices.
FAQ
What is the difference between AP3436 and AP3436A?
The AP3436 operates exclusively in forced PWM mode at 1.25MHz regardless of load, while the AP3436A adds pulse-skipping modulation (PSM) for light-load operation. In PSM, switching frequency drops dynamically to reduce quiescent current and improve efficiency below ~300mA - critical for standby power in consumer electronics.
Can AP3436ADNTR-G1 operate with VIN = VCC = 3.3V?
Yes. VIN supports 1.3V–5.5V and VCC supports 3.0V–5.5V, so 3.3V is fully within both ranges. At 3.3V input, typical efficiency remains >85% at 3A/1.2V output, and MOSFET RDS(on) increases only moderately (70mΩ typ), maintaining robust performance without derating.
How is the PGOOD threshold calibrated, and what happens outside the window?
PGOOD asserts low when FB falls below 75% or rises above 125% of the 0.6V internal reference (i.e., 0.45V–0.75V). It features 7% hysteresis: recovery occurs at 82% (0.492V) on rising FB and 118% (0.708V) on falling FB. This prevents chatter during marginal output conditions.
Is the exposed pad (Pin 11) electrically connected to GND internally?
Yes. The exposed thermal pad is internally tied to GND and must be soldered to a dedicated PCB GND plane. It serves as the primary thermal conduction path (θJC = 3°C/W) and contributes significantly to EMI reduction - floating or unconnected pads cause thermal runaway and PGOOD faults.
AP3436ADNTR-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):
- 1.3V
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 0.8V
- Voltage - Output (Max):
- 5.5V
- Current - Output:
- 3A
- Frequency - Switching:
- 1.25MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- U-DFN3030-10
AP3436ADNTR-G1 FAQ
1.How can I place an order for AP3436ADNTR-G1 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP3436ADNTR-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 AP3436ADNTR-G1 reliable?
The price and inventory of AP3436ADNTR-G1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP3436ADNTR-G1 is usually 5 days.
3.What payment methods are accepted for AP3436ADNTR-G1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP3436ADNTR-G1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP3436ADNTR-G1?
AP3436ADNTR-G1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP3436ADNTR-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 AP3436ADNTR-G1?
For technical support, including AP3436ADNTR-G1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP3436ADNTR-G1 requirements.
6.How does Aetrix verify that AP3436ADNTR-G1 is sourced from the original manufacturer or authorized distributors?
All AP3436ADNTR-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 AP3436ADNTR-G1 meets industry standards.
7.What is the process for return or replacement of AP3436ADNTR-G1?
All AP3436ADNTR-G1 units undergo pre-shipment inspection (PSI). If there is an issue with AP3436ADNTR-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 AP3436ADNTR-G1 part is unused and in its original packaging.
Return procedure for AP3436ADNTR-G1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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