My Inquiry
My Account
Diodes Incorporated AP3436DNTR-G1
- Part No.:
- AP3436DNTR-G1
- Manufacturer:
- Diodes Incorporated
- Package:
- 10-WFDFN Exposed Pad
- Datasheet:
-
AP3436DNTR-G1.pdf
- Description:
- IC REG BUCK ADJ 3A UDFN303010
- Quantity:
- Payment:
- Shipping:
Inventory:1,151
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
AP3436DNTR-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 reference voltage (±1.5% precision), fixed PWM operation, and U-DFN3030-10 thermally enhanced package. It delivers up to 95% efficiency in desktop, notebook, and LCD display power systems.
For engineers reviewing the AP3436DNTR-G1 datasheet, AP3436DNTR-G1 pinout, AP3436DNTR-G1 application, or AP3436DNTR-G1 equivalent, key selection criteria include its 1.25MHz fixed-frequency current-mode control, 3.0–5.5V VCC input range, 1.3–5.5V VIN operating range, and integrated soft-start, UVLO (2.75V), and open-drain PGOOD functions.
Technical Context
The AP3436DNTR-G1 implements current-mode control with cycle-by-cycle current limiting and a digitally generated soft-start ramp that drives the error amplifier's non-inverting input until reaching 0.6V. Its internal oscillator fixes switching frequency at 1.25MHz (typ), independent of load, enabling compact external components including ≤1.5µH inductors and ≤88µF output capacitors.
It integrates dual N-MOSFETs with matched on-resistance (50mΩ typ each at VBOOT_SW = 5V), supports analog VCC and power VIN rails independently, and features a dedicated BOOT pin with internal 16Ω charge resistor and 2.2V BOOT-to-SW UVLO threshold for gate drive integrity.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | 3A continuous - supports single-rail CPU core or SoC I/O power delivery without external current sharing. |
| Switching Frequency | 1.25MHz (typ) - enables use of small 1.5µH inductors and ceramic output capacitors under 100µF. |
| Reference Voltage | 0.600V ±1.5% - sets output voltage via external resistor divider; enables 0.8V–VIN adjustable range with <0.3% load regulation. |
| MOSFET RDS(on) | 50mΩ (high-side & low-side, typ at VBOOT-SW = 5V) - minimizes conduction loss at 3A, supporting >95% peak efficiency. |
| VCC Input Range | 3.0V to 5.5V - powers analog circuitry separately from main VIN rail, improving noise immunity and startup reliability. |
| UVLO Threshold | 2.75V (VCC) with 150mV hysteresis - prevents erratic operation during brown-out; ensures clean POR before EN activation. |
| PGOOD Window | 75–125% of VREF (i.e., 0.45–0.75V) with 7% hysteresis - provides robust power sequencing feedback for FPGA or processor reset logic. |
Pinout & Package
AP3436DNTR-G1 uses a thermally enhanced U-DFN3030-10 (3mm × 3mm, 0.7mm height) package with exposed thermal pad (Pin 11) requiring PCB GND connection for junction-to-board thermal resistance of 3°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 FB | Voltage feedback input | Connects to VOUT via resistor divider; senses output to regulate 0.6V reference; input bias current <100nA minimizes divider error. |
| 2 VCC | Analog supply input | Powers internal error amp, oscillator, and logic; must be ≥3.0V and decoupled with 1µF ceramic near pin. |
| 3 VIN | Main power input | Supplies high-side MOSFET and power path; operates down to 1.3V, enabling wide-input industrial or battery-derived rails. |
| 4,5 GND | Power ground return | Dual GND pins reduce ground bounce; must connect directly to low-impedance PCB ground plane with short traces. |
| 6,7 SW | Switch node output | Drives external LC filter; carries high di/dt; requires tight layout with minimal loop area to limit EMI. |
| 8 BOOT | High-side gate driver supply | Charged via internal 16Ω resistor from SW; maintains gate drive above VIN during HS conduction; UVLO protects boot capacitor discharge. |
| 9 PGOOD | Open-drain power-good indicator | Sinks current when FB is outside 75–125% VREF; requires external pull-up (3–100kΩ) to ≤5V for system monitoring. |
| 10 EN | Enable control input | Active-high logic: >1.6V enables, <0.8V for >10µs disables; supports sequencing with upstream regulators or microcontrollers. |
| 11 EP | Exposed thermal pad | Must be soldered to solid GND copper pour; primary thermal path for 160°C shutdown protection and 33°C/W θJA performance. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated dual N-MOSFETs | 50mΩ HS + 50mΩ LS (typ) eliminates external switch selection, reduces BOM count, and ensures matched timing for zero dead-time optimization. |
| Fixed 1.25MHz PWM mode | Guarantees constant switching frequency across full 0–3A load range-simplifies EMI filtering and avoids audible noise in consumer displays. |
| Built-in soft-start | 0.8–2ms programmable ramp time prevents inrush current into output capacitors; eliminates need for external SS capacitor or circuitry. |
| Comprehensive protection suite | Includes UVLO (2.75V), OCP (7.6A typ), UVP/OVP (65µs delay), thermal shutdown (160°C trip, 20°C hysteresis), and latch-off SCP recovery. |
| Green RoHS & Halogen-free | Fully compliant with EU Directive 2011/65/EU; <900ppm Br/Cl, <1000ppm Sb; suitable for eco-sensitive consumer and medical end equipment. |
Applications
| Desktop & Notebook Power Rails | Low-Voltage High-Density Systems |
|---|---|
|
Use Scenario: Generating 1.0V/3A core voltage for Intel Celeron or AMD Athlon processors in space-constrained thin-and-light notebooks. IC Role / Device Role / Timing Role: Primary synchronous buck regulator delivering regulated core power with fast transient response to CPU DVFS events. Use Value: 1.25MHz fixed frequency allows 1.5µH inductor and 88µF output capacitance-reducing solution footprint by >35% vs. 500kHz alternatives. |
Use Scenario: Point-of-load conversion in network switches where board area is limited and thermal dissipation must be managed within 85°C ambient. IC Role / Device Role / Timing Role: Compact, thermally efficient step-down stage converting 5V backplane to 3.3V/3A for PHY ICs and SerDes interfaces. Use Value: U-DFN3030-10 package with exposed pad achieves 3°C/W θJC, enabling full 3A load without heatsink in 2-layer PCB designs. |
| Set-Top Box DC-DC Conversion | LCD Display Panel Supply |
|
Use Scenario: Replacing linear regulators in legacy STB designs to improve efficiency from ~40% to >85% while maintaining low EMI in RF-sensitive environments. IC Role / Device Role / Timing Role: Main 1.2V/3A SoC supply with EN-controlled power sequencing aligned to HDMI hot-plug detection logic. Use Value: Open-drain PGOOD with 75–125% window provides reliable reset assertion to ARM application processor before firmware execution. |
Use Scenario: Driving LED backlight drivers or TCON (timing controller) rails in 24-inch commercial LCD panels requiring stable 1.8V/3A with low ripple. IC Role / Device Role / Timing Role: Secondary buck stage supplying TCON logic from 5V USB-C PD source, synchronized to display frame rate timing. Use Value: ±1.5% reference accuracy and <0.4% line regulation ensure consistent gamma correction and color fidelity across input voltage variation. |
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 | 2.5A max output, 2MHz switching, 0.8V ref, no PGOOD, smaller 2mm×2mm QFN | Limited to lower-current applications; lacks power-good signaling required for processor sequencing | Select only if output current ≤2.5A and PGOOD is not needed; verify thermal margin at 85°C ambient. |
| RT7295BGJ8F | 3A, 1.5MHz, 0.6V ref, integrated PGOOD, but requires external bootstrap capacitor and has no EN pin | Needs additional passive component; unsuitable for enable-controlled power trees or multi-rail sequencing | Prefer when fixed-frequency operation and PGOOD are critical, but EN functionality and layout simplicity are secondary. |
Compared with MP2315DJ-LF-Z and RT7295BGJ8F, AP3436DNTR-G1 uniquely combines 3A capability, 1.25MHz fixed PWM, EN control, open-drain PGOOD, and integrated BOOT capacitor drive-making it optimal for compact, sequenced, and reliability-critical embedded power rails.
Availability
AP3436DNTR-G1 is available at Aetrix Electronics and suitable for desktop & notebook power rails, low-voltage high-density systems, and LCD display panel supply requiring stable component supply, long-term lifecycle support, and RoHS-compliant sourcing.
Supply support for AP3436DNTR-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-efficiency power management, signal integrity, and protection solutions for consumer, computing, and industrial markets.
The AP3436 series belongs to Diodes' high-performance synchronous buck converter product line, designed specifically for space-constrained, high-efficiency point-of-load applications demanding low quiescent current, fast transient response, and comprehensive fault protection.
FAQ
What is the maximum recommended output current for AP3436DNTR-G1?
The AP3436DNTR-G1 is rated for 3A continuous output current under recommended operating conditions (TA ≤ +85°C, proper PCB thermal design). At 3A, typical efficiency exceeds 80% with VIN=5V and VOUT=1.2V. Derating is required above 85°C ambient or with inadequate copper pour on the exposed pad.
Does AP3436DNTR-G1 support automatic light-load efficiency optimization?
No - AP3436DNTR-G1 operates exclusively in forced PWM mode at 1.25MHz regardless of load. The AP3436A variant adds pulse-skipping modulation (PSM) for improved light-load efficiency. This part (AP3436DNTR-G1) is the base PWM-only version, optimized for predictable EMI and fast transient response.
Can AP3436DNTR-G1 be used with a single 5V supply for both VIN and VCC?
Yes, but a 4.7Ω resistor must be placed between VIN and VCC per Note 4 in the datasheet to isolate analog and power domains and prevent switching noise from coupling into the error amplifier. Direct connection risks instability or degraded reference accuracy.
What is the minimum output voltage achievable with AP3436DNTR-G1?
The minimum regulated output voltage is 0.6V - set by the internal 0.6V reference. With standard 1% resistors, outputs as low as 0.8V are practical; sub-0.8V requires careful layout and low-tolerance dividers due to FB input current-induced errors. The device does not support 0.5V or lower outputs.
AP3436DNTR-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
AP3436DNTR-G1 FAQ
1.How can I place an order for AP3436DNTR-G1 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP3436DNTR-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 AP3436DNTR-G1 reliable?
The price and inventory of AP3436DNTR-G1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP3436DNTR-G1 is usually 5 days.
3.What payment methods are accepted for AP3436DNTR-G1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP3436DNTR-G1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP3436DNTR-G1?
AP3436DNTR-G1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP3436DNTR-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 AP3436DNTR-G1?
For technical support, including AP3436DNTR-G1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP3436DNTR-G1 requirements.
6.How does Aetrix verify that AP3436DNTR-G1 is sourced from the original manufacturer or authorized distributors?
All AP3436DNTR-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 AP3436DNTR-G1 meets industry standards.
7.What is the process for return or replacement of AP3436DNTR-G1?
All AP3436DNTR-G1 units undergo pre-shipment inspection (PSI). If there is an issue with AP3436DNTR-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 AP3436DNTR-G1 part is unused and in its original packaging.
Return procedure for AP3436DNTR-G1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AP3436DNTR-G1 Tags
-
TPS562201DDCR
Texas Instruments
-
MC34063ABD-TR
STMicroelectronics
-
TPS561201DDCR
Texas Instruments
-
MC33063ADR
Texas Instruments
-
MC34063ADR
Texas Instruments
-
TPS560200DBVR
Texas Instruments
-
AP3012KTR-G1
Diodes Incorporated
-
TLV61048DBVR
Texas Instruments
-
AZ34063UMTR-G1
Diodes Incorporated
-
TPS562200DDCR
Texas Instruments
-
AP62300TWU-7
Diodes Incorporated
-
MC34063EBD-TR
STMicroelectronics
Tech Hub
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.
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…
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…
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…
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 …
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…
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…
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…
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…
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…
