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Diodes Incorporated AP7348D-3030RS4-7
- Part No.:
- AP7348D-3030RS4-7
- Manufacturer:
- Diodes Incorporated
- Package:
- 8-XFDFN Exposed Pad
- Datasheet:
-
AP7348D-3030RS4-7.pdf
- Description:
- LDO CMOS LOWCURR X1-DFN1612-8 T&
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
AP7348D-3030RS4-7 from Diodes Incorporated is a quad-channel, 300mA low-dropout linear regulator with independent enable control (EN1 for VOUT1/VOUT3, EN2 for VOUT2/VOUT4), ±1% output voltage accuracy, 75dB PSRR at 1kHz, and 60µVrms output noise (10Hz–100kHz). It delivers fixed 3.0V outputs on all four channels and is designed for noise-sensitive RF and digital supply rails in compact portable electronics.
For engineers reviewing the AP7348D-3030RS4-7 datasheet, AP7348D-3030RS4-7 pinout, AP7348D-3030RS4-7 application, or AP7348D-3030RS4-7 equivalent, this device supports simultaneous multi-rail power sequencing, thermal shutdown per channel, foldback current limiting, and auto-discharge-critical for battery-powered IoT modules, camera subsystems, and Wi-Fi baseband supplies requiring stable, low-noise biasing.
Technical Context
The AP7348D-3030RS4-7 integrates four independent CMOS-based LDO regulators sharing two precision voltage references and discrete error amplifiers. Each channel features dedicated overtemperature sensing, foldback current limiting, and an internal discharge FET (10Ω typical) activated during disable.
Enable logic is partitioned: EN1 controls VOUT1 and VOUT3; EN2 controls VOUT2 and VOUT4. Thermal shutdown triggers at +155°C with +25°C hysteresis, disabling all channels simultaneously. Input voltage range is 1.7V to 5.25V, supporting single-cell Li-ion and USB-powered systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 3.0V per channel - eliminates external resistor networks and ensures consistent rail matching across four domains. |
| Output Accuracy | ±1% at +25°C - guarantees tight regulation for core logic and RF ICs requiring stable 3.0V bias without post-regulation trimming. |
| PSRR | 75dB at 1kHz - suppresses switching noise from upstream DC/DC converters feeding noisy system rails. |
| Output Noise | 60µVrms (10Hz–100kHz) - enables clean power for RF transceivers and high-resolution ADCs without added filtering. |
| Quiescent Current | 160µA total (all channels enabled) - extends battery life in always-on sensor nodes and low-power wake-up circuits. |
| Dropout Voltage | 0.25V typical at 300mA (for 3.0V output) - allows operation down to 3.25V input, compatible with aging Li-ion cells. |
| Thermal Shutdown | +155°C threshold with +25°C hysteresis - prevents thermal runaway during sustained 300mA load per channel. |
Pinout & Package
AP7348D-3030RS4-7 is housed in the X1-DFN1612-8 (Type B) package: 1.6mm × 1.2mm, 0.4mm pitch, thermally enhanced with exposed thermal pad. Requires PCB land pattern per Diodes' recommended layout (D2=1.30mm, E2=0.30mm, thermal pad soldered for optimal θJA=160°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 GND | Ground reference | Primary return path for all four channels; must connect to low-impedance ground plane. |
| 2 VOUT3 | Channel 3 regulated output | 3.0V fixed output; requires local 1µF ceramic capacitor for stability and transient response. |
| 3 VOUT4 | Channel 4 regulated output | 3.0V fixed output; independent of other channels but shares thermal shutdown detection. |
| 4 EN2 | Enable input for CH2 & CH4 | Active-high control; 1.3V min high threshold ensures compatibility with 1.8V/3.3V GPIOs. |
| 5 VOUT2 | Channel 2 regulated output | 3.0V fixed output; disabled when EN2 = low, with active discharge via 10Ω internal FET. |
| 6 VDD | Main power input | Supplies all four LDOs; requires 4.7µF ceramic decoupling capacitor placed adjacent to pin. |
| 7 VOUT1 | Channel 1 regulated output | 3.0V fixed output; enabled/disabled synchronously with VOUT3 via EN1. |
| 8 EN1 | Enable input for CH1 & CH3 | Active-high control; independent timing from EN2 enables staggered power-up sequences. |
Key Features
| Feature | Design Value |
|---|---|
| Independent dual-enable architecture | EN1 and EN2 allow grouped control of VOUT1/VOUT3 and VOUT2/VOUT4 - enabling flexible power sequencing for SoC + peripheral rail separation. |
| Per-channel thermal protection | Each LDO has dedicated overtemperature sensing; all channels shut down if any exceeds +155°C - prevents localized hot-spot failure. |
| Auto-discharge on disable | 10Ω internal NMOS discharge path per output rapidly collapses VOUT to GND (<100µs decay time) - avoids floating rails and latch-up in downstream logic. |
| Low-noise, high-PSRR design | 60µVrms noise + 75dB PSRR at 1kHz - meets stringent requirements for RF front-end biasing and PLL supply filtering. |
| Wide input voltage range | 1.7V to 5.25V operation - supports direct connection to single-cell Li-ion (2.7–4.2V), USB 3.3V, or buck converter outputs. |
Applications
| Smartphone Baseband Power | Wi-Fi 6/6E Module Supply |
|---|---|
|
Use Scenario: Powering application processor I/O banks, memory interfaces, and PMIC companion rails in space-constrained smartphone mainboards. IC Role / Device Role / Timing Role: Quad-rail LDO delivering matched 3.0V supplies with synchronized or staggered enable control for controlled power-up sequencing. Use Value: Eliminates need for four discrete LDOs, reducing BOM count by 75% and PCB area by >40% while maintaining ±1% rail accuracy and <60µV noise. |
Use Scenario: Providing clean, isolated 3.0V bias to Wi-Fi 6E transceiver RF sections, MAC controllers, and coexistence logic in access point modules. IC Role / Device Role / Timing Role: Low-noise quad-LDO supplying independent rails to analog RF, digital baseband, and auxiliary circuitry with EN1/EN2 isolation. Use Value: 75dB PSRR rejects switch-mode noise from shared 5V system rail; 60µVrms noise ensures EVM compliance in 160MHz channel bandwidths. |
| IoT Sensor Hub Power | Camera Module Core Logic |
|
Use Scenario: Powering BLE/Wi-Fi SoC, environmental sensors (IMU, barometer), and secure element in battery-operated edge nodes. IC Role / Device Role / Timing Role: Ultra-low-quiescent (160µA total) quad-LDO enabling always-on sensing with selective channel shutdown via EN pins. Use Value: Enables >1-year battery life in coin-cell designs; per-channel thermal shutdown prevents overheating during firmware updates or sensor bursts. |
Use Scenario: Supplying image signal processor (ISP), MIPI interface, and autofocus actuator drivers in mobile camera modules. IC Role / Device Role / Timing Role: Four tightly regulated 3.0V rails powering ISP cores, pixel array bias, serial interface, and motor drivers with independent discharge. Use Value: Auto-discharge on EN deassertion prevents ghost power to MIPI lanes; ±1% accuracy ensures consistent color processing across temperature. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad-LDO applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AP7347D-3030RS4-7 | Three-channel version (VOUT1/VOUT2/VOUT3 = 3.0V); no VOUT4 - reduces channel count by 25%. | Lacks fourth rail; unsuitable for designs requiring four independent 3.0V domains. | Select only if system requires exactly three regulated 3.0V outputs and board space is constrained. |
| TPL7407LPGDR | Single-channel 300mA LDO with 50µVrms noise and 70dB PSRR; no multi-channel integration or dual-enable logic. | Requires four separate ICs and additional GPIOs for enable control - increases layout complexity and BOM cost. | Choose only when channel independence, thermal isolation, or footprint minimization are not design priorities. |
Compared with AP7347D-3030RS4-7, the AP7348D-3030RS4-7 adds a fourth 3.0V rail without increasing package size; versus TPL7407LPGDR, it consolidates four regulators into one die with coordinated enable and thermal management - reducing component count, routing congestion, and system-level power sequencing overhead.
Availability
AP7348D-3030RS4-7 is available at Aetrix Electronics and suitable for smartphone baseband power, Wi-Fi 6E module supply, and IoT sensor hub applications requiring stable component supply, guaranteed long-term availability, and full traceability.
Supply support for AP7348D-3030RS4-7 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 AP7348 belongs to Diodes' high-PSRR, low-noise LDO family engineered specifically for multi-rail power delivery in compact, battery-powered communication devices where rail matching, noise immunity, and thermal resilience are critical.
FAQ
What is the maximum allowable power dissipation for AP7348D-3030RS4-7?
The absolute maximum power dissipation is 600mW, as specified in the Absolute Maximum Ratings table. Exceeding this limit triggers thermal shutdown at +155°C. At 300mA per channel and 3.0V output, total dissipation depends on input voltage: for example, at VDD = 4.2V, total PD ≈ 4 × (4.2V − 3.0V) × 0.3A = 1.44W - which exceeds 600mW. Therefore, derating or lower VDD is required to stay within safe limits.
Can EN1 and EN2 be tied together for simultaneous four-channel control?
Yes, EN1 and EN2 can be connected to a single GPIO to enable or disable all four channels concurrently. However, doing so forfeits the key advantage of independent sequencing - such as powering VOUT1/VOUT3 before VOUT2/VOUT4 to meet SoC boot requirements. The datasheet confirms both pins accept the same logic thresholds (1.3V min high, 0.5V max low).
Is the thermal pad electrically connected internally?
No - the thermal pad is not electrically connected to any internal node. It is intended solely for thermal conduction and may be left floating or connected to GND for improved heat sinking. Pin 1 (GND) remains the mandatory electrical ground connection; the thermal pad does not substitute for it.
Does AP7348D-3030RS4-7 support adjustable output voltages?
No - AP7348D-3030RS4-7 is a fixed-output device with factory-trimmed 3.0V on all four channels. The "3030" in the part number explicitly denotes 3.0V for CH1/CH2 and 3.0V for CH3/CH4. Adjustable versions (e.g., AP7348W) use different suffixes and require external feedback resistors - not supported by this variant.
AP7348D-3030RS4-7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- 8-XFDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Output Configuration:
- Positive
- Output Type:
- Fixed
- Number of Regulators:
- 4
- Voltage - Input (Max):
- 5.25V
- Voltage - Output (Min/Fixed):
- 3V, 3V, 3V, 3V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.33V @ 300mA, 0.33V @ 300mA, 0.33V @ 300mA, 0.33V @ 300mA
- Current - Output:
- 300mA, 300mA, 300mA, 300mA
- Current - Quiescent (Iq):
- 280 µA
- Current - Supply (Max):
- -
- PSRR:
- 75dB (1kHz)
- Control Features:
- Enable
- Protection Features:
- Over Current, Over Temperature, Short Circuit
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- X1-DFN1612-8 (Type B)
AP7348D-3030RS4-7 FAQ
1.How can I place an order for AP7348D-3030RS4-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP7348D-3030RS4-7 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 AP7348D-3030RS4-7 reliable?
The price and inventory of AP7348D-3030RS4-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP7348D-3030RS4-7 is usually 5 days.
3.What payment methods are accepted for AP7348D-3030RS4-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP7348D-3030RS4-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP7348D-3030RS4-7?
AP7348D-3030RS4-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP7348D-3030RS4-7 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 AP7348D-3030RS4-7?
For technical support, including AP7348D-3030RS4-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP7348D-3030RS4-7 requirements.
6.How does Aetrix verify that AP7348D-3030RS4-7 is sourced from the original manufacturer or authorized distributors?
All AP7348D-3030RS4-7 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 AP7348D-3030RS4-7 meets industry standards.
7.What is the process for return or replacement of AP7348D-3030RS4-7?
All AP7348D-3030RS4-7 units undergo pre-shipment inspection (PSI). If there is an issue with AP7348D-3030RS4-7, 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 AP7348D-3030RS4-7 part is unused and in its original packaging.
Return procedure for AP7348D-3030RS4-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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