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Diodes Incorporated AP7344D-2818RH4-7
- Part No.:
- AP7344D-2818RH4-7
- Manufacturer:
- Diodes Incorporated
- Package:
- 8-XFDFN Exposed Pad
- Datasheet:
-
AP7344D-2818RH4-7.pdf
- Description:
- IC REG LIN 1.8V/2.8V X2DFN1612-8
- Quantity:
- Payment:
- Shipping:
Inventory:4,210
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Product details
Overview
AP7344D-2818RH4-7 from Diodes Incorporated is a dual-channel CMOS low-dropout regulator delivering fixed 2.8V 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 channel-ideal for powering RF circuitry and baseband processors in compact portable devices.
For engineers reviewing the AP7344D-2818RH4-7 datasheet, AP7344D-2818RH4-7 pinout, AP7344D-2818RH4-7 application, or AP7344D-2818RH4-7 equivalent, key selection criteria include dual-rail sequencing capability, ultra-low quiescent current (50µA per active channel), thermal pad layout requirements, and discharge functionality enabled by the 'D' suffix.
Technical Context
The AP7344D-2818RH4-7 integrates two independent LDO regulators on a single CMOS die, each with dedicated error amplifier, voltage reference, current-limit circuit, and enable input. Channel 1 delivers 2.8V and Channel 2 delivers 1.8V-both factory-trimmed and fixed via internal resistor networks.
It features built-in auto-discharge (enabled by the 'D' suffix) through integrated N-channel MOSFETs (50Ω on-resistance per channel when disabled), enabling rapid VOUT discharge during shutdown. The device supports operation across –40°C to +85°C ambient and maintains stability with ≥1.0µF ceramic output capacitors.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltages | 2.8V (Ch1) and 1.8V (Ch2), fixed-eliminates external feedback resistors and simplifies PCB layout for dual-rail systems. |
| Max Output Current | 300mA per channel-supports moderate-power digital ICs (e.g., baseband processors, RF transceivers) without external boost stages. |
| Output Accuracy | ±1% at +25°C, ±1.5% over –40°C to +85°C-ensures reliable logic-level compliance for 1.8V/2.8V I/O domains. |
| PSRR | 75dB at 1kHz-effectively suppresses switching noise from upstream DC/DC converters feeding noisy power rails. |
| Output Noise | 60µVrms (10Hz–100kHz)-meets stringent noise requirements for RF front-end biasing and precision analog circuitry. |
| Quiescent Current | 50µA per active channel-extends battery life in always-on subsystems such as sensor hubs or real-time clocks. |
| Dropout Voltage | 260mV at 300mA (2.8V output), 300mV at 300mA (1.8V output)-enables high-efficiency regulation even with marginal input headroom (e.g., single-cell Li-ion). |
Pinout & Package
X2-DFN1612-8 package: 1.6mm × 1.2mm, 0.4mm pitch, thermally enhanced with exposed copper pad (not electrically connected to GND by default-requires intentional PCB connection per thermal design).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND (Pins 1, 4) | Power ground reference | Dual ground pins reduce ground loop impedance and improve PSRR; must be tied to low-impedance PCB ground plane. |
| VOUT1 (Pin 2) | Channel 1 regulated output | Delivers fixed 2.8V; requires local 1.0µF ceramic capacitor placed adjacent to pin for transient stability. |
| VOUT2 (Pin 3) | Channel 2 regulated output | Delivers fixed 1.8V; shares same capacitor sizing and placement rules as VOUT1. |
| EN2 (Pin 5) | Channel 2 enable input | Active-high logic input (1.3V–5.25V threshold); floating state prohibited-must be pulled high or low via external resistor or controller. |
| VIN2 (Pin 6) | Channel 2 input supply | Accepts 1.7V–5.25V; decoupled by 1.0µF ceramic capacitor placed near pin to suppress input ripple and load transients. |
| VIN1 (Pin 7) | Channel 1 input supply | Independent input rail-allows separate power domain sourcing (e.g., buck converter for 2.8V, LDO for 1.8V). |
| EN1 (Pin 8) | Channel 1 enable input | Independent enable control enables staggered power-up sequencing between 2.8V and 1.8V rails. |
| Thermal Pad | Thermal dissipation interface | Exposed copper area under package; must be connected to large PCB copper pour tied to GND for thermal performance (PD = 600mW max). |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent LDOs | Two fully isolated regulators on one die-enables independent enable, shutdown, and fault management per rail without cross-talk. |
| Auto-discharge function | Integrated 50Ω N-MOSFET per output discharges VOUT to GND within microseconds upon EN deactivation-prevents back-powering of downstream circuits. |
| Ultra-low noise & high PSRR | 60µVrms noise + 75dB PSRR at 1kHz-preserves signal integrity in sensitive RF/analog sections powered from noisy system rails. |
| Low quiescent current | 50µA per active channel-critical for battery-powered applications where standby current directly impacts shelf life. |
| Wide input voltage range | 1.7V–5.25V operation-supports direct connection to single-cell Li-ion (2.7–4.2V), USB (4.75–5.25V), or buck converter outputs. |
Applications
| Smartphone Baseband Power | RF Transceiver Biasing |
|---|---|
|
Use Scenario: Supplying core logic (1.8V) and I/O (2.8V) domains of an application processor in a smartphone. IC Role / Device Role / Timing Role: Dual-rail LDO providing clean, sequenced power to processor sub-blocks with independent enable control. Use Value: Eliminates need for two discrete LDOs and associated passives-reducing BOM count and PCB area by >40% versus discrete solution. |
Use Scenario: Powering RF power amplifier (PA) bias and low-noise amplifier (LNA) stages in a 4G/5G front-end module. IC Role / Device Role / Timing Role: Low-noise 2.8V rail for PA bias and ultra-stable 1.8V rail for LNA analog core. Use Value: 60µVrms noise ensures minimal phase noise degradation in RF signal chains; 75dB PSRR rejects switching artifacts from PMIC sources. |
| Camera Module Core Logic | Wireless Adapter SoC Power |
|
Use Scenario: Delivering regulated 1.8V and 2.8V to image signal processor (ISP) and CMOS image sensor in mobile camera modules. IC Role / Device Role / Timing Role: Dual-output LDO with fast load transient response (<100µs recovery) to handle burst-mode sensor readout currents. Use Value: Load transient waveforms show <±10mV deviation at 300mA step-maintains ISP clock stability and prevents image artifacts. |
Use Scenario: Powering Wi-Fi/BT combo chip requiring separate 1.8V digital core and 2.8V radio supply in portable hotspot devices. IC Role / Device Role / Timing Role: Compact dual-LDO enabling simultaneous power delivery with independent enable for low-power sleep modes. Use Value: 0.1µA standby current (both EN low) extends battery runtime in always-connected IoT adapters without compromising wake latency. |
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-2818RH4-7 | Successor part with improved dropout (220mV @300mA for 2.8V), lower noise (45µVrms), and AEC-Q200 qualification option. | Targeted for new designs requiring extended lifetime support and automotive-grade reliability. | Select when long-term supply assurance and enhanced electrical specs justify redesign effort. |
| TPL7407LPWR | Single-channel 300mA LDO (1.8V only), no dual output, no discharge function, higher IQ (120µA). | Suitable only if 2.8V rail is sourced separately-increases component count and layout complexity. | Use only as stopgap if AP7344D-2818RH4-7 stock is unavailable and dual-rail integration is not required. |
Compared with AP7344D-2818RH4-7, the AP7345D offers measurable improvements in dropout and noise but requires board-level redesign; the TPL7407LPWR sacrifices integration and discharge capability, increasing system-level BOM cost and reducing power efficiency in multi-rail systems.
Availability
AP7344D-2818RH4-7 is available at Aetrix Electronics and suitable for smartphone baseband power, RF transceiver biasing, camera module core logic, and wireless adapter SoC power requiring stable component supply across industrial and consumer production cycles.
Supply support for AP7344D-2818RH4-7 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 semiconductor company specializing in discrete, analog, and mixed-signal solutions, with design centers in Asia, Europe, and the U.S., and manufacturing in ISO/TS 16949-certified facilities.
The AP7344 series belongs to Diodes' high-PSRR, low-noise LDO portfolio, engineered specifically for space-constrained, battery-powered portable electronics demanding dual-rail precision regulation and ultra-low standby consumption.
FAQ
What is the function of the thermal pad on the X2-DFN1612-8 package?
The thermal pad is an exposed copper area beneath the die used exclusively for heat dissipation. It must be connected to a large PCB copper pour tied to GND to achieve the rated 600mW power dissipation. It is not an electrical ground terminal by default and should never be used as the sole GND connection point for the device.
Does AP7344D-2818RH4-7 support independent power sequencing between its two outputs?
Yes-EN1 and EN2 are fully independent enable inputs. Driving EN1 high before EN2 allows controlled 2.8V-first sequencing, critical for processors requiring I/O voltage before core voltage. Each enable has defined thresholds (0–0.5V low, 1.3–5.25V high) and leakage <1.0µA, ensuring robust control interface compatibility.
How does the auto-discharge feature operate, and what is its impact on system behavior?
When either EN pin is driven low, the corresponding channel's integrated 50Ω N-MOSFET connects VOUT to GND, discharging output capacitance rapidly. This prevents back-powering of upstream circuitry or latch-up in downstream ICs during power-down-essential for reliable hot-plug and sleep/wake transitions in portable systems.
Can AP7344D-2818RH4-7 operate with input voltage below 2.0V?
Yes-the device supports VIN as low as 1.7V. At 1.7V input, it can sustain 1.8V output with up to ~150mA load (based on 300mV dropout spec), making it viable for deeply discharged Li-ion cells or low-voltage energy harvesting systems where maintaining 1.8V rail integrity is critical.
AP7344D-2818RH4-7 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, 2.8V
- 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-2818RH4-7 FAQ
1.How can I place an order for AP7344D-2818RH4-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP7344D-2818RH4-7 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-2818RH4-7 reliable?
The price and inventory of AP7344D-2818RH4-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP7344D-2818RH4-7 is usually 5 days.
3.What payment methods are accepted for AP7344D-2818RH4-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP7344D-2818RH4-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP7344D-2818RH4-7?
AP7344D-2818RH4-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP7344D-2818RH4-7 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-2818RH4-7?
For technical support, including AP7344D-2818RH4-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP7344D-2818RH4-7 requirements.
6.How does Aetrix verify that AP7344D-2818RH4-7 is sourced from the original manufacturer or authorized distributors?
All AP7344D-2818RH4-7 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-2818RH4-7 meets industry standards.
7.What is the process for return or replacement of AP7344D-2818RH4-7?
All AP7344D-2818RH4-7 units undergo pre-shipment inspection (PSI). If there is an issue with AP7344D-2818RH4-7, 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-2818RH4-7 part is unused and in its original packaging.
Return procedure for AP7344D-2818RH4-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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