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Diodes Incorporated AP7344D-3328RH4-7
- Part No.:
- AP7344D-3328RH4-7
- Manufacturer:
- Diodes Incorporated
- Package:
- 8-XFDFN Exposed Pad
- Datasheet:
-
AP7344D-3328RH4-7.pdf
- Description:
- IC REG LIN 2.8V/3.3V X2DFN1612-8
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
AP7344D-3328RH4-7 from Diodes Incorporated is a dual-channel CMOS low-dropout regulator delivering fixed 3.3V and 2.8V outputs, each rated for 300mA continuous current, ±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 per channel for power sequencing in compact portable electronics.
For engineers reviewing the AP7344D-3328RH4-7 datasheet, AP7344D-3328RH4-7 pinout, AP7344D-3328RH4-7 application, or AP7344D-3328RH4-7 equivalent, key selection criteria include dual-rail low-noise biasing, high PSRR for RF supply isolation, thermal performance in X2-DFN1612-8, and discharge capability for fast VOUT ramp-down in battery-powered systems.
Technical Context
The AP7344D-3328RH4-7 integrates two independent LDO regulators on a single CMOS die, each with dedicated error amplifier, voltage reference, current-limit circuit, and EN control. Its architecture enables simultaneous regulation of asymmetric rails-3.3V for I/O logic and 2.8V for RF front-end stages-without cross-coupling.
Each channel features built-in auto-discharge (enabled by 'D' suffix), delivering ~50Ω on-resistance between VOUT and GND during shutdown to rapidly deplete output capacitance. The device maintains stability with ≥0.47µF ceramic input and ≥1.0µF ceramic output capacitors, supporting fast load transient response (<100µs recovery) under 1mA–300mA step loads.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltages | 3.3V (Channel 1) and 2.8V (Channel 2), factory-fixed via internal resistor network - eliminates external feedback components and ensures rail integrity in space-constrained layouts. |
| Output Accuracy | ±1% at +25°C, ±1.5% over −40°C to +85°C - guarantees stable core/IO voltage margins for processors and RF ICs without calibration. |
| PSRR | 75dB at 1kHz - suppresses switching noise from DC/DC converters feeding VIN, critical for clean RF supply in wireless adapters and cameras. |
| Output Noise | 60µVrms (10Hz–100kHz) - minimizes phase jitter in clock-sensitive analog circuits such as camera sensor interfaces and audio codecs. |
| Dropout Voltage | 220mV at 300mA for 3.3V output; 260mV at 300mA for 2.8V output - enables operation from single-cell Li-ion (3.0V min) while sustaining full load. |
| Quiescent Current | 100µA typical with both EN pins high; 0.1–1.0µA in shutdown - extends battery life in always-on subsystems like Bluetooth LE sensors. |
| Enable Thresholds | EN low ≤0.5V, EN high ≥1.3V - compatible with 1.8V/3.3V GPIOs without level-shifting, simplifying host MCU interface. |
Pinout & Package
The AP7344D-3328RH4-7 is housed in an 8-pin X2-DFN1612-8 package (1.6mm × 1.2mm, 0.4mm pitch) with exposed thermal pad. This ultra-compact, lead-free, halogen-free package supports high-density PCB layouts and efficient heat dissipation when the thermal pad is connected to a large GND copper area.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND (Pins 1, 4) | Power ground reference | Dual GND pins reduce ground impedance and improve PSRR; must be tied to low-impedance system GND plane. |
| VOUT1 (Pin 2) | Channel 1 regulated output | Delivers fixed 3.3V; requires local 1.0µF ceramic capacitor to GND for stability and transient response. |
| VOUT2 (Pin 3) | Channel 2 regulated output | Delivers fixed 2.8V; independent from VOUT1 - enables isolated power domains for mixed-signal SoCs. |
| EN2 (Pin 5) | Channel 2 enable input | Active-high control; floating prohibited - tie to VIN2 or MCU GPIO to sequence RF supply after baseband power-up. |
| VIN2 (Pin 6) | Channel 2 input supply | Accepts 1.7–5.25V; decoupled by 0.47µF ceramic cap close to pin to prevent input droop during load transients. |
| VIN1 (Pin 7) | Channel 1 input supply | Independent input path allows separate sourcing (e.g., buck converter for 3.3V rail, LDO for 2.8V rail). |
| EN1 (Pin 8) | Channel 1 enable input | Enables/disables 3.3V rail independently; supports dynamic power gating in multi-core applications. |
| Thermal Pad | Thermal conduction path | Not electrically functional as GND - connect to PCB GND pour for thermal relief; improves θJA by >30°C/W. |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent LDOs | Two fully isolated regulators on one die - eliminates inter-rail coupling, supports asymmetric voltage sequencing (e.g., 3.3V before 2.8V). |
| Auto-discharge function | ~50Ω internal NMOS between VOUT and GND during shutdown - discharges 10µF output cap in <500µs, preventing back-powering of downstream logic. |
| Ultra-low noise output | 60µVrms integrated noise (10Hz–100kHz) - meets stringent analog supply requirements for image sensors and RF synthesizers. |
| High PSRR across frequency | 75dB @1kHz, >60dB up to 100kHz - rejects ripple from noisy switchers without additional LC filtering. |
| Wide input range | 1.7V to 5.25V operation - supports direct connection to single-cell Li-ion (2.7–4.2V), USB VBUS (4.75–5.25V), or buck-regulated intermediate rails. |
Applications
| Smartphone Baseband Power | RF Front-End Biasing |
|---|---|
|
Use Scenario: Supplying 3.3V I/O and 2.8V RF transceiver in LTE/5G handset designs with tight board area constraints. IC Role / Device Role / Timing Role: Dual-rail LDO providing independent, low-noise, sequenced power to application processor I/O banks and RF power amplifier driver stage. Use Value: Eliminates need for two discrete regulators, reduces BOM count by 1, and maintains 2.8V rail stability during PA burst transmission (200mA peak). |
Use Scenario: Biasing 2.8V LNA and mixer stages in Wi-Fi 6/6E modules where supply noise directly impacts EVM and receiver sensitivity. IC Role / Device Role / Timing Role: Dedicated low-noise 2.8V regulator (Channel 2) isolating RF analog supply from digital 3.3V domain (Channel 1). Use Value: 60µVrms noise and 75dB PSRR ensure <−165dBc/Hz phase noise floor, meeting IEEE 802.11ax ACI specifications. |
| Camera Sensor Interface | Portable Media Player Audio |
|
Use Scenario: Powering 3.3V image signal processor (ISP) and 2.8V CMOS image sensor in compact action cameras. IC Role / Device Role / Timing Role: Dual-output LDO delivering synchronized, low-ripple power to ISP core and sensor analog front-end with independent enable control. Use Value: Independent EN1/EN2 pins allow sensor power-up only after ISP initialization, preventing spurious reset or data corruption. |
Use Scenario: Regulating 3.3V DAC supply and 2.8V headphone amplifier in battery-powered DAPs requiring >20-hour playback. IC Role / Device Role / Timing Role: Low-quiescent-current dual LDO supplying precision analog rails while minimizing standby power loss. Use Value: 100µA operating IQ and 0.1µA shutdown current extend runtime by 8% versus legacy dual-LDO solutions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-rail LDO applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AP7345D-3328RH4-7 | Successor with improved dropout (200mV @300mA), lower noise (45µVrms), and AEC-Q100 Grade 2 qualification. | Required for automotive infotainment displays needing extended temperature support and enhanced reliability. | Select when new designs demand higher efficiency, lower noise, or automotive qualification - not drop-in due to revised thermal pad layout. |
| TPL7407LDR | Single 7-channel 250mA LDO array; no dual fixed-voltage option; 65dB PSRR; no auto-discharge. | Suitable for multi-rail microcontroller peripherals but lacks independent enable and discharge for RF sequencing. | Choose only if consolidating >3 rails onto one IC and 2.8V/3.3V dual output is not mandatory. |
Compared with AP7344D-3328RH4-7, the AP7345D offers measurable improvements in dropout and noise for next-gen portable designs, while the TPL7407LDR trades dual-rail precision for channel count - making it viable only in non-RF, non-battery-critical applications where rail flexibility outweighs noise performance.
Availability
AP7344D-3328RH4-7 is available at Aetrix Electronics and suitable for smartphone baseband power, RF front-end biasing, and camera sensor interface applications requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant packaging.
Supply support for AP7344D-3328RH4-7 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 ICs, with design centers in Asia, Europe, and the US, and manufacturing in IATF 16949-certified facilities.
The AP7344 series belongs to Diodes' high-PSRR, low-noise LDO portfolio targeting battery-powered portable electronics - designed specifically to replace multiple single-channel regulators with minimal footprint and superior RF supply rejection.
FAQ
What is the maximum allowable input voltage for AP7344D-3328RH4-7?
The absolute maximum input voltage is 6.0V, but recommended operating range is 1.7V to 5.25V. Exceeding 5.25V risks violating safe operating area limits and may trigger thermal shutdown or permanent damage, especially under 300mA load. For USB-powered applications, use a 5.25V-rated input capacitor and verify worst-case VIN ripple does not exceed this limit.
Does AP7344D-3328RH4-7 support independent power sequencing between its two outputs?
Yes - EN1 controls Channel 1 (3.3V) and EN2 controls Channel 2 (2.8V) independently. Each enable pin has defined thresholds (EN low ≤0.5V, EN high ≥1.3V) and can be driven by separate MCU GPIOs or power-good signals, enabling precise startup/shutdown order such as powering the 3.3V logic rail before enabling the 2.8V RF rail.
How does the auto-discharge feature operate, and what is its on-resistance?
When either EN pin is pulled low, the corresponding channel activates an internal ~50Ω NMOS between VOUT and GND, discharging output capacitance. This occurs only in shutdown mode, not during normal regulation. Measured on the D-version (indicated by 'D' in part number), it reduces VOUT decay time from milliseconds to sub-millisecond for 10µF loads, preventing back-powering of downstream circuitry.
Can AP7344D-3328RH4-7 be used with ceramic output capacitors smaller than 1.0µF?
No - the datasheet specifies minimum 1.0µF ceramic COUT for stability across all operating conditions. Using smaller values (e.g., 0.47µF) risks oscillation or degraded transient response, particularly at high load currents (>200mA) or elevated temperatures. Layout must place COUT within 2mm of VOUT and GND pins with low-inductance traces.
AP7344D-3328RH4-7 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):
- 2.8V, 3.3V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.3V @ 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-3328RH4-7 FAQ
1.How can I place an order for AP7344D-3328RH4-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP7344D-3328RH4-7 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-3328RH4-7 reliable?
The price and inventory of AP7344D-3328RH4-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP7344D-3328RH4-7 is usually 5 days.
3.What payment methods are accepted for AP7344D-3328RH4-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP7344D-3328RH4-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP7344D-3328RH4-7?
AP7344D-3328RH4-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP7344D-3328RH4-7 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-3328RH4-7?
For technical support, including AP7344D-3328RH4-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP7344D-3328RH4-7 requirements.
6.How does Aetrix verify that AP7344D-3328RH4-7 is sourced from the original manufacturer or authorized distributors?
All AP7344D-3328RH4-7 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-3328RH4-7 meets industry standards.
7.What is the process for return or replacement of AP7344D-3328RH4-7?
All AP7344D-3328RH4-7 units undergo pre-shipment inspection (PSI). If there is an issue with AP7344D-3328RH4-7, 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-3328RH4-7 part is unused and in its original packaging.
Return procedure for AP7344D-3328RH4-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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