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Diodes Incorporated AP7344D-2518RH4-7
- Part No.:
- AP7344D-2518RH4-7
- Manufacturer:
- Diodes Incorporated
- Package:
- 8-XFDFN Exposed Pad
- Datasheet:
-
AP7344D-2518RH4-7.pdf
- Description:
- IC REG LIN 1.8V/2.5V X2DFN1612-8
- Quantity:
- Payment:
- Shipping:
Inventory:4,037
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Product details
Overview
AP7344D-2518RH4-7 from Diodes Incorporated is a dual-channel CMOS low-dropout regulator delivering fixed 2.5V and 1.8V outputs, 300mA per channel, ±1% output voltage accuracy, 75dB PSRR at 1kHz, and 60µVrms output noise (10Hz–100kHz). It operates from 1.7V to 5.25V input and supports independent enable control for each regulator-ideal for powering RF supplies and camera sensor rails in space-constrained portable electronics.
For engineers reviewing the AP7344D-2518RH4-7 datasheet, AP7344D-2518RH4-7 pinout, AP7344D-2518RH4-7 application, or AP7344D-2518RH4-7 equivalent, key selection criteria include dual-output voltage pairing, ultra-low quiescent current (50µA per active channel), thermal-pad-enabled X2-DFN1612-8 package, and built-in discharge functionality for rapid VOUT decay during shutdown.
Technical Context
The AP7344D-2518RH4-7 integrates two independent LDO regulators on a single CMOS die, each with dedicated error amplifier, voltage reference, current-limit circuit, and enable input. Its architecture enables simultaneous regulation of asymmetric supply rails-e.g., 2.5V for analog front-end circuits and 1.8V for digital logic-without cross-regulation interference.
Each channel features low-RDSON pass devices, enabling dropout voltages as low as 250mV at 300mA (for VOUT > 2.5V) and full operation down to 1.7V input. The integrated thermal pad and X2-DFN1612-8 footprint support high-density PCB layouts while maintaining thermal stability across −40°C to +85°C ambient.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltages | 2.5V (Channel 1) and 1.8V (Channel 2), factory-fixed-eliminates external resistor networks and ensures stable rail generation without calibration. |
| Max Output Current | 300mA per channel-supports moderate-power subsystems like image sensors or RF transceivers without external boost stages. |
| Output Accuracy | ±1% at +25°C, ±1.5% over −40°C to +85°C-enables direct interfacing with 1.8V/2.5V I/O standards without margining overhead. |
| PSRR | 75dB at 1kHz-suppresses switching noise from adjacent DC-DC converters, critical for clean RF and ADC power domains. |
| Output Noise | 60µVrms (10Hz–100kHz)-meets low-noise requirements for precision analog circuits and high-resolution camera signal chains. |
| Quiescent Current | 50µA per active channel-extends battery life in always-on sensor nodes and standby modes of portable media devices. |
| Dropout Voltage | 250mV at 300mA (2.5V output); 390mV at 300mA (1.8V output)-allows operation from single-cell Li-ion (3.0V min) or boosted 2.8V rails with headroom. |
| Enable Logic | EN1/EN2 accept 1.3V–5.25V high-level input; <0.5V disables-enables direct GPIO control from 1.8V/3.3V microcontrollers without level-shifting. |
Pinout & Package
X2-DFN1612-8 package: 1.6mm × 1.2mm, 0.4mm pitch, exposed thermal pad (not electrically connected to GND by default). Requires PCB copper pour under thermal pad for optimal thermal dissipation; pad may be tied to GND or left floating per layout constraints.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND (Pins 1, 4) | Power ground reference | Dual ground pins reduce ground loop impedance and improve PSRR; must connect to low-impedance system ground plane. |
| VOUT1 (Pin 2) | Channel 1 regulated output | Delivers fixed 2.5V; requires local 1.0µF ceramic capacitor placed adjacent to pin for stability and transient response. |
| VOUT2 (Pin 3) | Channel 2 regulated output | Delivers fixed 1.8V; shares same stability requirements as VOUT1 but operates independently under EN2 control. |
| EN2 (Pin 5) | Channel 2 enable input | Active-high logic: ≥1.3V enables 1.8V output; ≤0.5V forces shutdown with auto-discharge-prevents floating states that cause leakage or latch-up. |
| VIN2 (Pin 6) | Channel 2 input supply | Accepts 1.7V–5.25V; may be shared with VIN1 or powered separately for rail isolation in mixed-signal systems. |
| VIN1 (Pin 7) | Channel 1 input supply | Independent input path allows different source domains (e.g., buck converter vs. battery) for each LDO channel. |
| EN1 (Pin 8) | Channel 1 enable input | Active-high logic: ≥1.3V enables 2.5V output; supports staggered power-up sequencing between analog and digital rails. |
| Thermal Pad | Thermal dissipation interface | Not an electrical terminal; must be soldered to large PCB copper area for thermal management-critical for sustained 300mA operation. |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent LDOs | Enables simultaneous 2.5V/1.8V rail generation with separate enable and input controls-reduces BOM count versus discrete regulators. |
| Ultra-low noise (60µVrms) | Minimizes jitter in clock-sensitive circuits and preserves SNR in audio/video signal paths without additional filtering. |
| High PSRR (75dB @ 1kHz) | Rejects ripple from noisy switchers (e.g., PMIC buck outputs), allowing co-location with power ICs in compact mobile PCBs. |
| Built-in discharge function | Actively pulls VOUT to GND during shutdown-ensures fast, predictable power-down of downstream logic and prevents latch-up. |
| Wide input range (1.7V–5.25V) | Supports direct connection to single-cell Li-ion (2.8V–4.2V), USB 5V, or intermediate buck outputs without pre-regulation. |
| ±1% output accuracy | Guarantees compliance with 1.8V/2.5V I/O voltage tolerances (e.g., JEDEC JESD8-12, JEDEC JESD8-15) across temperature and load. |
Applications
| RF Power Amplifier Bias | CMOS Image Sensor Core Supply |
|---|---|
|
Use Scenario: Providing clean, low-noise bias voltage to GaAs pHEMT or SiGe HBT RF power amplifiers in 4G/5G front-end modules. IC Role / Device Role / Timing Role: Dual LDO delivers isolated 2.5V PA drain bias and 1.8V driver-stage supply, with independent EN control for transmit/receive mode switching. Use Value: 75dB PSRR suppresses switching noise from adjacent envelope-tracking DC-DC converters, improving ACLR by >3dB in LTE transmission. |
Use Scenario: Powering analog core and digital interface of high-resolution rolling-shutter CMOS image sensors in smartphones. IC Role / Device Role / Timing Role: AP7344D-2518RH4-7 supplies 2.5V to pixel analog circuitry and 1.8V to column ADC and LVDS transmitter-both rails sequenced via EN1/EN2. Use Value: 60µVrms noise floor prevents fixed-pattern noise in dark-frame subtraction; ±1% accuracy maintains consistent ADC reference scaling. |
| Wireless Adapter Baseband SoC | Portable Media Player Audio Codec |
|
Use Scenario: Regulating dual supplies for Wi-Fi/BT combo SoCs with separate analog PHY and digital MAC voltage domains. IC Role / Device Role / Timing Role: Channel 1 (2.5V) powers RF synthesizer and LNA; Channel 2 (1.8V) powers ARM Cortex-M4 and memory interface-each enabled on demand. Use Value: Independent enable inputs allow dynamic power gating of unused subsystems, reducing idle current to <1µA (ISTANDBY). |
Use Scenario: Delivering precision analog and digital supplies to stereo audio codecs in battery-powered MP3 players and Bluetooth speakers. IC Role / Device Role / Timing Role: 2.5V rail powers DAC analog section and headphone amplifier; 1.8V rail powers digital filters and I²S interface-both stabilized against battery sag. Use Value: Low 50µA quiescent current extends playback time; 250mV dropout enables full 2.5V output even at end-of-life battery voltage (3.0V). |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-output LDO applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AP7345D-2518RH4-7 | Successor device with improved PSRR (80dB @ 1kHz), lower dropout (220mV @ 300mA for 2.5V), and extended temp range (−40°C to +125°C). | Designed for automotive AEC-Q100 Grade 2 applications; includes enhanced ESD protection (±4kV HBM) and tighter load regulation (±10mV). | Select when new designs require higher reliability, wider temperature operation, or stricter noise immunity-especially for ADAS camera modules. |
| TPL7407LDR | Single-channel 300mA LDO (2.5V only); no second output, no discharge function, higher quiescent current (120µA), and larger SOT-23-6 package. | Lacks dual-rail capability and independent enable-requires two devices and extra board space to replicate AP7344D-2518RH4-7 functionality. | Consider only if legacy design constraints prevent DFN adoption or if only one regulated rail is needed with minimal feature set. |
Compared with AP7344D-2518RH4-7, the AP7345D offers measurable PSRR and thermal performance gains for next-gen designs, while the TPL7407LDR incurs significant area, cost, and complexity penalties to achieve partial functional equivalence-making it unsuitable for space- or efficiency-critical dual-rail systems.
Availability
AP7344D-2518RH4-7 is available at Aetrix Electronics and suitable for RF power amplifier biasing, CMOS image sensor core supply, and wireless adapter baseband SoC applications requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for AP7344D-2518RH4-7 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 connectivity solutions for consumer, industrial, and automotive markets.
The AP7344 series belongs to Diodes' high-PSRR, low-noise LDO portfolio-designed specifically for noise-sensitive portable electronics where dual asymmetric rails, minimal board area, and battery longevity are critical.
FAQ
What is the function of the thermal pad on the AP7344D-2518RH4-7?
The thermal pad is a non-electrical copper land on the underside of the X2-DFN1612-8 package, designed solely for heat dissipation. It must be soldered to a large PCB copper pour-ideally connected to GND for both thermal and electrical grounding-but must not serve as the sole GND connection. Proper thermal pad layout reduces junction temperature rise by up to 35°C at 300mA, preventing thermal shutdown and ensuring long-term reliability.
Can AP7344D-2518RH4-7 operate with only one channel enabled?
Yes. The AP7344D-2518RH4-7 supports independent channel operation: EN1 can be held high while EN2 is pulled low (or vice versa), resulting in only the 2.5V or 1.8V output being active. Quiescent current drops to 50µA for the enabled channel and <1.0µA for the disabled channel (ISTANDBY), making it suitable for power-gated subsystems in portable devices where rail activation is dynamic and asymmetric.
Does AP7344D-2518RH4-7 require external capacitors, and what values are recommended?
Yes. Each channel requires a minimum 1.0µF ceramic capacitor (X5R/X7R, 0402 or 0603) placed within 2mm of its respective VOUT and GND pins. Input capacitors of ≥0.47µF ceramic are also required at VIN1 and VIN2. These values ensure stability across all operating conditions and provide adequate transient response for load steps up to 300mA/µs-verified in Diodes' characterization data for the X2-DFN1612-8 package.
Is AP7344D-2518RH4-7 qualified for automotive applications?
No. AP7344D-2518RH4-7 is not AEC-Q100 qualified and is intended for commercial/industrial use only. Diodes recommends the pin-compatible AP7345D-2518RH4-7 for automotive applications, which meets AEC-Q100 Grade 2 (−40°C to +105°C), includes PPAP documentation, and is manufactured in IATF 16949-certified facilities-addressing the reliability and change-control requirements of automotive Tier 1 suppliers.
AP7344D-2518RH4-7 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, 2.5V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.39V @ 300mA, 0.3V @ 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-2518RH4-7 FAQ
1.How can I place an order for AP7344D-2518RH4-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP7344D-2518RH4-7 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-2518RH4-7 reliable?
The price and inventory of AP7344D-2518RH4-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP7344D-2518RH4-7 is usually 5 days.
3.What payment methods are accepted for AP7344D-2518RH4-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP7344D-2518RH4-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP7344D-2518RH4-7?
AP7344D-2518RH4-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP7344D-2518RH4-7 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-2518RH4-7?
For technical support, including AP7344D-2518RH4-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP7344D-2518RH4-7 requirements.
6.How does Aetrix verify that AP7344D-2518RH4-7 is sourced from the original manufacturer or authorized distributors?
All AP7344D-2518RH4-7 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-2518RH4-7 meets industry standards.
7.What is the process for return or replacement of AP7344D-2518RH4-7?
All AP7344D-2518RH4-7 units undergo pre-shipment inspection (PSI). If there is an issue with AP7344D-2518RH4-7, 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-2518RH4-7 part is unused and in its original packaging.
Return procedure for AP7344D-2518RH4-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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