My Inquiry
My Account
Diodes Incorporated AUR9705AGD
- Part No.:
- AUR9705AGD
- Manufacturer:
- Diodes Incorporated
- Package:
- 6-WDFN Exposed Pad
- Datasheet:
-
AUR9705AGD.pdf
- Description:
- IC REG BUCK ADJ 1A 6DFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,345
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
AUR9705AGD from Diodes Incorporated is a synchronous step-down DC-DC converter delivering up to 1A output current with adjustable output voltage (1V–3.3V), 1.5MHz fixed switching frequency, and integrated PMOS/NMOS power switches. It operates across 2.5V–5.5V input range, features automatic PWM/LDO mode switching, and targets portable power rails in space-constrained applications such as mobile phone baseband ICs and camera sensor supplies.
For engineers reviewing the AUR9705AGD datasheet, AUR9705AGD pinout, AUR9705AGD application, or AUR9705AGD equivalent, key selection criteria include feedback voltage (600mV), thermal shutdown threshold (+160°C), quiescent current (100μA), and package-specific layout requirements for WDFN-2×2-6 with exposed pad.
Technical Context
The AUR9705AGD employs constant-frequency peak-current-mode control with internal oscillator and compensation, eliminating external timing capacitors. Its dual-MOSFET synchronous rectification architecture enables high efficiency without an external Schottky diode.
It integrates soft-start, under-voltage lockout (1.8V rising threshold with 0.1V hysteresis), and thermal shutdown protection. The device automatically transitions between PWM and LDO modes to maintain regulation at light loads while minimizing quiescent current.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | 1A maximum continuous - supports single-core application processors and image sensors requiring stable low-noise 1.2V/1.8V rails. |
| Switching Frequency | 1.5MHz typical - enables use of compact 2.2μH inductors and 10μF ceramic output capacitors in handheld PCB layouts. |
| Feedback Voltage | 600mV ±15mV - sets output via resistor divider; allows precise 1.0V–3.3V adjustment with <±3% total output accuracy over load/line/temp. |
| Input Voltage Range | 2.5V to 5.5V - compatible with single-cell Li-ion (3.0–4.2V), USB VBUS (4.75–5.25V), and regulated 3.3V/5V system rails. |
| Quiescent Current | 100μA typical at zero load - minimizes battery drain during standby in always-on subsystems like Bluetooth audio receivers. |
| Thermal Shutdown | +160°C junction temperature - protects against sustained overload or poor PCB thermal design without requiring external thermal monitoring. |
| PMOS/NMOS RDS(ON) | 0.25Ω / 0.27Ω at 200mA - reduces conduction loss and improves full-load efficiency (>90% at 5V→3.3V/1A). |
Pinout & Package
Package: WDFN-2×2-6 with exposed thermal pad (pin 6 = LX, pin 5 = GND, pin 4 = FB, pin 3 = EN, pin 2 = VIN, pin 1 = NC). Exposed pad must be soldered to PCB ground plane for thermal and electrical performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (NC) | No internal connection | Floating or tied to GND per layout best practice; no functional role in operation or biasing. |
| 2 (VIN) | Power supply input | Primary input rail (2.5–5.5V); requires local 4.7μF low-ESR ceramic capacitor placed within 3mm of pin. |
| 3 (EN) | Enable control input | Active-high logic signal (1.5V min high, 0.6V max low); controls startup/shutdown sequence and soft-start initiation. |
| 4 (FB) | Feedback node | Connects to resistor divider output; regulates output by comparing to 600mV internal reference; sensitive to noise coupling. |
| 5 (GND) | Power ground reference | System ground return for NMOS switch and error amplifier; must be low-impedance path to minimize switching noise injection. |
| 6 (LX) | Switch node | Drives external inductor; carries high di/dt square wave (0V to VIN); requires short, wide copper trace and tight loop with COUT. |
Key Features
| Feature | Design Value |
|---|---|
| Synchronous buck topology | Integrated PMOS/NMOS switches eliminate external Schottky diode, reducing BOM count and improving efficiency by ~8% at 1A. |
| Automatic PWM/LDO mode switching | Maintains regulation down to microamp loads without burst-mode noise; avoids audible switching artifacts in audio-sensitive circuits. |
| Internal compensation network | Removes need for external compensation components; simplifies design validation and ensures stability with standard 2.2μH/10μF output filter. |
| Low dropout at 100% duty cycle | Supports VOUT ≥ VIN − 0.3V in LDO mode - enables near-lossless regulation when input drops close to output (e.g., 3.3V→3.0V). |
| Soft-start timing | Internally controlled ramp (typ. 1ms) limits inrush current into output capacitor, preventing input rail collapse during power-up. |
Applications
| Mobile Baseband Power | Digital Camera Sensor Rail |
|---|---|
|
Use Scenario: Powering ARM Cortex-A series application processors in smartphones during active and idle states. IC Role / Device Role / Timing Role: Primary core voltage regulator delivering dynamically scaled 1.0V–1.2V at up to 1A with fast transient response. Use Value: Automatic PWM/LDO transition maintains regulation during deep-sleep current (10μA) without compromising wake-up latency or efficiency. |
Use Scenario: Supplying CIS image sensors in compact digital cameras requiring low-noise, ripple-free 2.5V–2.8V bias. IC Role / Device Role / Timing Role: Post-regulator stepping down main 3.3V system rail to precision analog sensor voltage. Use Value: 1.5MHz switching frequency places ripple energy beyond sensitive analog bandwidths; <15mVpp output ripple measured at 1A load. |
| Wireless Headset Audio Codec | Notebook I/O Expansion Rail |
|
Use Scenario: Providing clean 1.8V supply to Bluetooth audio codecs in true wireless stereo earbuds. IC Role / Device Role / Timing Role: Low-quiescent-current DC-DC converter enabling >100hr standby on 50mAh battery. Use Value: 100μA IQ and 600mV feedback reference allow accurate 1.8V setting with minimal divider current (≤30nA FB leakage). |
Use Scenario: Generating 3.3V auxiliary rail for PCIe M.2 SSD interface or USB-C controller in ultrabooks. IC Role / Device Role / Timing Role: Secondary point-of-load regulator decoupling high-speed digital I/O from main system rail. Use Value: WDFN-2×2-6 package with exposed pad achieves ≤53°C/W θJA, sustaining 1A continuous output without thermal derating in thin-profile chassis. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MP2158GQZ-P | Higher 2MHz switching frequency; 0.6V feedback; 0.8A rating; QFN-8 package with different pinout. | Limited to 0.8A output; requires re-layout due to 8-pin QFN footprint and relocated LX/GND pins. | Select when board space permits larger package and higher frequency enables smaller magnetics, but verify thermal margin at 1A-equivalent load. |
| TPS62231DRVR | 1.8V–6.5V input; 0.6V feedback; 0.6A rating; 2.5MHz operation; TSOT-23-6 package. | Lower current capability and narrower input range; unsuitable for 2.5V input or 1A sustained loads. | Consider only for lower-power companion rails where 0.6A suffices and 2.5MHz allows ultra-compact LC filters. |
Compared with MP2158GQZ-P and TPS62231DRVR, the AUR9705AGD uniquely balances 1A output, 2.5V minimum input, and WDFN-2×2-6 thermal performance - making it optimal for space- and battery-life-constrained portable designs where full 1A capability is required at low VIN.
Availability
AUR9705AGD is available at Aetrix Electronics and suitable for mobile phone power management, digital camera sensor regulation, and wireless headset audio codec supply requiring stable component supply, long-term lifecycle support, and RoHS-compliant green packaging.
Supply support for AUR9705AGD 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 solutions for consumer, computing, and industrial markets.
The AUR9705 belongs to Diodes' high-frequency synchronous buck converter product line, designed specifically for portable electronics demanding small size, low quiescent current, and seamless light-load efficiency.
FAQ
What is the recommended PCB layout for thermal performance with AUR9705AGD?
The WDFN-2×2-6 package requires the exposed pad (EP) to be soldered to a minimum 25mm² copper pour connected to GND via ≥4 thermal vias (0.3mm diameter, spaced ≤1mm apart). VIN and LX traces must be wide and short; FB trace should be routed away from noisy nodes and guarded by GND on both sides to prevent regulation error.
Can AUR9705AGD operate with input voltage below 2.5V?
No. The absolute minimum recommended input voltage is 2.5V per datasheet Section 4. The UVLO threshold is 1.8V (rising), but stable operation-including full 1A output and regulation accuracy-is only guaranteed from 2.5V to 5.5V. Operation below 2.5V may cause premature UVLO triggering or degraded efficiency.
How does the automatic PWM/LDO mode switching affect output voltage accuracy?
During LDO mode (light loads), the device maintains regulation using the same 600mV feedback reference and error amplifier, preserving ±3% output accuracy. The transition occurs seamlessly at ~10mA load, with no step change in VOUT-verified by load transient plots showing <20mV deviation during mode crossing.
Is the NC pin (Pin 1) required to be grounded in the WDFN-2×2-6 package?
No. Pin 1 is internally unconnected and may be left floating or tied to GND per PCB routing convenience. Diodes Incorporated's layout guidelines do not mandate grounding; however, connecting it to GND improves mechanical anchoring and provides minor EMI shielding benefit without affecting functionality.
AUR9705AGD Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- 6-WDFN 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):
- 2.5V
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 1V
- Voltage - Output (Max):
- 3.3V
- Current - Output:
- 1A
- Frequency - Switching:
- 1.5MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 80°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 6-DFN (2x2)
AUR9705AGD FAQ
1.How can I place an order for AUR9705AGD through Aetrix?
Please submit a Request for Quotation (RFQ) for AUR9705AGD 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 AUR9705AGD reliable?
The price and inventory of AUR9705AGD are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AUR9705AGD is usually 5 days.
3.What payment methods are accepted for AUR9705AGD?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AUR9705AGD transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AUR9705AGD?
AUR9705AGD orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AUR9705AGD 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 AUR9705AGD?
For technical support, including AUR9705AGD datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AUR9705AGD requirements.
6.How does Aetrix verify that AUR9705AGD is sourced from the original manufacturer or authorized distributors?
All AUR9705AGD 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 AUR9705AGD meets industry standards.
7.What is the process for return or replacement of AUR9705AGD?
All AUR9705AGD units undergo pre-shipment inspection (PSI). If there is an issue with AUR9705AGD, 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 AUR9705AGD part is unused and in its original packaging.
Return procedure for AUR9705AGD:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AUR9705AGD 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…
