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Diodes Incorporated AP7344D-3018RH4-7
- Part No.:
- AP7344D-3018RH4-7
- Manufacturer:
- Diodes Incorporated
- Package:
- 8-XFDFN Exposed Pad
- Datasheet:
-
AP7344D-3018RH4-7.pdf
- Description:
- IC REG LIN 1.8V/3V X2DFN1612-8
- Quantity:
- Payment:
- Shipping:
Inventory:4,974
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Product details
Overview
AP7344D-3018RH4-7 from Diodes Incorporated is a dual-channel CMOS low-dropout regulator delivering 300mA per channel with ±1% output voltage accuracy, 75dB PSRR at 1kHz, and 60µVrms output noise (10Hz–100kHz). It features independent enable inputs (EN1/EN2), fixed 3.0V and 1.8V outputs, and operates from 1.7V to 5.25V input - optimized for RF supply rails in compact portable devices.
For engineers reviewing the AP7344D-3018RH4-7 datasheet, AP7344D-3018RH4-7 pinout, AP7344D-3018RH4-7 application, or AP7344D-3018RH4-7 equivalent, key selection criteria include dual-rail sequencing capability, thermal performance in X2-DFN1612-8, discharge function support, and load transient response under 30mA–300mA step conditions.
Technical Context
The AP7344D-3018RH4-7 integrates two independent LDO regulators on a single CMOS die, each with dedicated error amplifier, voltage reference, current limit circuit, and enable control. Its architecture supports simultaneous or staggered power-up via separate EN1/EN2 signals, enabling precise rail sequencing in multi-voltage SoC subsystems.
It implements auto-discharge functionality (denoted by "D" suffix) through integrated N-channel MOSFETs (50Ω typical on-resistance) that actively pull down VOUT1/VOUT2 when disabled, preventing floating outputs and ensuring clean power-down behavior in battery-powered systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Channel 1: 3.0V fixed; Channel 2: 1.8V fixed - eliminates external feedback resistors and ensures stable bias for RF transceivers and core logic. |
| Output Accuracy | ±1% at +25°C, ±1.5% over −40°C to +85°C - guarantees consistent voltage margin for 1.8V I/O and 3.0V analog front-end circuits. |
| PSRR | 75dB at 1kHz - suppresses switching noise from adjacent DC/DC converters feeding shared input rails. |
| Output Noise | 60µVrms (10Hz–100kHz) - preserves signal integrity in sensitive RF receiver chains and camera sensor analog paths. |
| Dropout Voltage | 250mV max at 300mA (VOUT=3.0V); 390mV max at 300mA (VOUT=1.8V) - enables operation from single-cell Li-ion (3.0V min) while maintaining regulation. |
| Quiescent Current | 100–140µA (both channels enabled, no load); 0.1–1.0µA (both disabled) - extends battery life in always-on monitoring modes. |
| Enable Threshold | EN high = ≥1.3V; EN low = ≤0.5V - compatible with 1.8V and 3.3V GPIOs without level-shifting. |
Pinout & Package
The AP7344D-3018RH4-7 is housed in an X2-DFN1612-8 package (1.6mm × 1.2mm × 0.39mm), featuring an exposed thermal pad for enhanced heat dissipation in space-constrained layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND (Pins 1, 4) | Power ground reference | Dual GND pins reduce ground impedance and improve PSRR; thermal pad must be connected to PCB ground plane for thermal stability. |
| VOUT1 (Pin 2) | Channel 1 regulated output | Delivers fixed 3.0V at up to 300mA; requires local 1.0µF ceramic capacitor for stability and transient response. |
| VOUT2 (Pin 3) | Channel 2 regulated output | Delivers fixed 1.8V at up to 300mA; supports low-voltage digital cores and memory interfaces. |
| EN2 (Pin 5) | Channel 2 enable control | Active-high logic input; must not float - tie to VIN2 or MCU GPIO to manage power sequencing independently from Channel 1. |
| VIN2 (Pin 6) | Channel 2 input supply | Accepts 1.7V–5.25V; decoupled with 0.47µF ceramic capacitor placed adjacent to pin to suppress input ripple. |
| VIN1 (Pin 7) | Channel 1 input supply | Independent input path allows split-rail sourcing (e.g., VIN1 from PMIC buck, VIN2 from battery) for fault isolation. |
| EN1 (Pin 8) | Channel 1 enable control | Enables/disables 3.0V rail independently; supports dynamic power gating of RF modules during sleep cycles. |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent enable inputs | EN1 and EN2 allow asynchronous start-up/shutdown of 3.0V and 1.8V rails - essential for meeting SoC power sequencing requirements (e.g., VDDIO before VDDCORE). |
| Integrated auto-discharge | 50Ω N-channel FETs rapidly discharge VOUT1/VOUT2 upon disable - prevents residual voltage from interfering with reset timing or causing latch-up in downstream logic. |
| Ultra-low noise output | 60µVrms broadband noise enables direct powering of RF synthesizers and image sensor analog blocks without additional filtering. |
| High PSRR across frequency | 75dB @ 1kHz, >60dB up to 100kHz - maintains clean supply under high-frequency switching noise from nearby buck converters. |
| Wide input voltage range | 1.7V–5.25V operation supports single-cell Li-ion (2.7–4.2V), USB-powered (4.75–5.25V), and hybrid input architectures. |
Applications
| Smartphone Baseband Power | RF Front-End Biasing |
|---|---|
|
Use Scenario: Supplying 3.0V VDDIO and 1.8V VDDCORE to application processor during active and low-power states. IC Role / Device Role / Timing Role: Dual-rail LDO providing sequenced, low-noise bias with independent enable control for power-state transitions. Use Value: Eliminates need for discrete sequencing ICs; 60µVrms noise prevents bit errors in high-speed DDR interfaces. |
Use Scenario: Delivering clean 3.0V to PA driver stage and 1.8V to LNA/switch control logic in LTE/Wi-Fi front-end modules. IC Role / Device Role / Timing Role: Low-PSRR, low-noise dual LDO isolating RF analog supply from noisy digital domains. Use Value: 75dB PSRR at 1kHz rejects coupling from baseband clock harmonics, improving EVM by >2dB. |
| Camera Sensor Core Supply | Portable Media Player Audio Codec |
|
Use Scenario: Powering 1.8V image sensor digital core and 3.0V analog pixel array in ultra-thin mobile cameras. IC Role / Device Role / Timing Role: Compact dual-LDO with thermal pad enabling high-density placement near sensor die. Use Value: X2-DFN1612-8 footprint (1.92mm²) saves >40% board area vs. SOIC-8 alternatives while maintaining 300mA capability. |
Use Scenario: Generating 3.0V for headphone amplifier and 1.8V for DAC/ADC digital core in battery-powered audio players. IC Role / Device Role / Timing Role: Low-quiescent-current dual regulator extending playback time in standby mode. Use Value: 0.1–1.0µA shutdown current reduces battery drain to <1µA per rail during deep-sleep intervals. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-LDO applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AP7345D-3018RH4-7 | Successor device with improved thermal resistance (θJA reduced by 15°C/W) and tighter load regulation (±15mV vs. ±30mV). | Preferred for new designs requiring extended lifetime at 85°C ambient; identical pinout and BOM drop-in replacement. | Select when designing for AEC-Q200-compliant industrial or automotive-adjacent applications. |
| TPL7407LDR | Single-channel 300mA LDO (no dual output); lacks discharge function and has higher noise (120µVrms). | Requires two separate devices to replicate dual-rail functionality; increases PCB area and component count. | Only consider if only one rail is needed and cost-per-channel is prioritized over integration. |
Compared with AP7344D-3018RH4-7, the AP7345D-3018RH4-7 offers superior thermal performance and tighter regulation for long-term reliability, while TPL7407LDR sacrifices integration and noise performance to reduce unit cost - making AP7344D optimal for legacy space-constrained designs where qualification timelines prohibit redesign.
Availability
AP7344D-3018RH4-7 is available at Aetrix Electronics and suitable for smartphone baseband power, RF front-end biasing, and camera sensor core supply requiring stable component supply across production lifecycles.
Supply support for AP7344D-3018RH4-7 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 power management, signal integrity, and protection solutions for high-volume consumer and industrial markets.
The AP7344 series belongs to Diodes' high-PSRR, low-noise LDO portfolio designed specifically for portable communication equipment where board space, battery life, and RF cleanliness are critical constraints.
FAQ
What is the function of the thermal pad on the AP7344D-3018RH4-7 package?
The exposed thermal pad in the X2-DFN1612-8 package serves as the primary heat dissipation path. It must be soldered to a large copper area connected to GND on the PCB to achieve specified θJA of 220°C/W. Leaving it unconnected degrades thermal performance by >40%, risking thermal shutdown under 300mA load at 85°C ambient.
Can AP7344D-3018RH4-7 operate with only one channel enabled?
Yes - EN1 and EN2 are fully independent. Enabling only EN1 delivers 3.0V on VOUT1 while VOUT2 remains at 0V (discharged via internal FET). Quiescent current drops to 50–70µA in this configuration, making it suitable for partial-rail operation in low-power modes.
Is the 60µVrms output noise measured with specific output capacitance?
Yes - the 60µVrms noise specification is guaranteed with 1.0µF ceramic output capacitors (X5R/X7R, 0402 or 0603) placed within 2mm of VOUT/GND pins. Using larger or higher-ESR capacitors increases measured noise by up to 25µVrms due to degraded high-frequency filtering.
Does the "D" in AP7344D-3018RH4-7 indicate automotive qualification?
No - the "D" suffix denotes integrated auto-discharge functionality, not AEC-Q200 qualification. The AP7344D-3018RH4-7 is rated for −40°C to +85°C operation but is not AEC-Q200 qualified. For automotive use, Diodes recommends the AP7345D series with full PPAP support and IATF 16949 manufacturing.
AP7344D-3018RH4-7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- 8-XFDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Output Configuration:
- Positive
- Output Type:
- Fixed
- Number of Regulators:
- 2
- Voltage - Input (Max):
- 5.25V
- Voltage - Output (Min/Fixed):
- 1.8V, 3V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.39V @ 300mA, 0.29V @ 300mA
- Current - Output:
- 300mA, 300mA
- Current - Quiescent (Iq):
- 140 µA
- Current - Supply (Max):
- -
- PSRR:
- 75dB (1kHz)
- Control Features:
- Enable
- Protection Features:
- Over Current
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- X2-DFN1612-8
AP7344D-3018RH4-7 FAQ
1.How can I place an order for AP7344D-3018RH4-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP7344D-3018RH4-7 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 AP7344D-3018RH4-7 reliable?
The price and inventory of AP7344D-3018RH4-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP7344D-3018RH4-7 is usually 5 days.
3.What payment methods are accepted for AP7344D-3018RH4-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP7344D-3018RH4-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP7344D-3018RH4-7?
AP7344D-3018RH4-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP7344D-3018RH4-7 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 AP7344D-3018RH4-7?
For technical support, including AP7344D-3018RH4-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP7344D-3018RH4-7 requirements.
6.How does Aetrix verify that AP7344D-3018RH4-7 is sourced from the original manufacturer or authorized distributors?
All AP7344D-3018RH4-7 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 AP7344D-3018RH4-7 meets industry standards.
7.What is the process for return or replacement of AP7344D-3018RH4-7?
All AP7344D-3018RH4-7 units undergo pre-shipment inspection (PSI). If there is an issue with AP7344D-3018RH4-7, 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 AP7344D-3018RH4-7 part is unused and in its original packaging.
Return procedure for AP7344D-3018RH4-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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