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Diodes Incorporated AP7348D-1528RS4-7
- Part No.:
- AP7348D-1528RS4-7
- Manufacturer:
- Diodes Incorporated
- Package:
- 8-XFDFN Exposed Pad
- Datasheet:
-
AP7348D-1528RS4-7.pdf
- Description:
- LDO CMOS LOWCURR X1-DFN1612-8 T&
- Quantity:
- Payment:
- Shipping:
Inventory:3,381
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Product details
Overview
AP7348D-1528RS4-7 from Diodes Incorporated is a quad-channel CMOS low-dropout 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 300mA per channel across a 1.7V–5.25V input range and is optimized for multi-rail power in compact RF and imaging subsystems.
For engineers reviewing the AP7348D-1528RS4-7 datasheet, AP7348D-1528RS4-7 pinout, AP7348D-1528RS4-7 application, or AP7348D-1528RS4-7 equivalent, this device supports simultaneous dual-voltage rail generation (1.5V on CH1/CH3, 2.8V on CH2/CH4) with fast enable/disable response, thermal shutdown per channel, and auto-discharge functionality - critical for battery-powered IoT and mobile camera modules.
Technical Context
The AP7348D-1528RS4-7 integrates two independent voltage references and four error amplifiers, each with foldback current limiting and dedicated resistor networks to set fixed outputs. Its CMOS architecture enables ultra-low quiescent current (160µA total) while maintaining high PSRR and low noise performance across all channels.
Each channel features independent over-temperature sensing that disables only the affected regulator, preserving operation of remaining channels. The dual-enable architecture allows selective powering of 1.5V (CH1/CH3) and 2.8V (CH2/CH4) rails, supporting staggered startup and dynamic power gating in multi-core SoC applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | CH1 & CH3: 1.5V fixed; CH2 & CH4: 2.8V fixed - enables dual-rail supply without external feedback resistors |
| Output Accuracy | ±1% at +25°C - ensures stable core and I/O voltage margins for sensitive RF and image signal chains |
| PSRR | 75dB at 1kHz - suppresses switching noise from upstream DC-DC converters feeding the LDO input |
| Output Noise | 60µVrms (10Hz–100kHz) - minimizes phase noise impact on RF transceivers and ADC reference stability |
| Quiescent Current | 160µA total (all channels enabled) - extends battery life in always-on sensor and connectivity modules |
| Dropout Voltage | 0.26V max at 300mA (for 2.8V output) - allows operation from 3.06V input, compatible with single-cell Li-ion under load |
| Thermal Shutdown | 155°C threshold with 25°C hysteresis - prevents latch-up during transient overload without requiring system-level reset |
Pinout & Package
X1-DFN1612-8 (Type B) package: 1.6mm × 1.2mm × 0.39mm body with exposed thermal pad; RoHS-compliant, halogen-free, 2.359mg weight; moisture sensitivity level 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 GND | Ground reference | Primary return path for all four channels; must connect to PCB ground plane for thermal and noise performance |
| 2 VOUT3 | Channel 3 output | 1.5V regulated output (CH3); requires local 1µF ceramic capacitor for stability and transient response |
| 3 VOUT4 | Channel 4 output | 2.8V regulated output (CH4); shares EN2 enable with CH2; routed separately to avoid cross-coupling |
| 4 EN2 | Enable for CH2 & CH4 | Active-high logic input; drives CH2/CH4 into shutdown when low, enabling independent rail sequencing |
| 5 VOUT2 | Channel 2 output | 2.8V regulated output (CH2); paired with VOUT4 under EN2 control for dual 2.8V rail management |
| 6 VDD | Power input | Common input for all channels (1.7V–5.25V); requires 4.7µF ceramic decoupling capacitor placed adjacent to pin |
| 7 VOUT1 | Channel 1 output | 1.5V regulated output (CH1); paired with VOUT3 under EN1 control for dual 1.5V rail management |
| 8 EN1 | Enable for CH1 & CH3 | Active-high logic input; drives CH1/CH3 into shutdown when low, enabling power domain isolation |
| Thermal Pad | Thermal dissipation node | Electrically isolated copper pad; must be soldered to PCB ground plane for θJA = 160°C/W thermal performance |
Key Features
| Feature | Design Value |
|---|---|
| Independent dual-enable control | EN1 manages 1.5V rails (CH1/CH3); EN2 manages 2.8V rails (CH2/CH4) - enables flexible power sequencing and domain isolation |
| Per-channel thermal shutdown | Each channel disables independently at 155°C - maintains partial system operation during localized overheating |
| Auto-discharge on disable | N-channel discharge switch (10Ω typical) actively pulls VOUT to GND when EN is low - prevents floating outputs and residual bias |
| Low-noise CMOS architecture | 60µVrms integrated noise (10Hz–100kHz) with no external bypass capacitor required - simplifies layout for noise-sensitive analog circuits |
| High PSRR with wide bandwidth | 75dB rejection at 1kHz and maintained >50dB up to 100kHz - effective against DC-DC ripple and digital switching noise |
Applications
| Smartphone Camera Module | Wi-Fi 6/6E Access Point |
|---|---|
|
Use Scenario: Powering image sensor analog core (1.5V) and ISP interface (2.8V) in dual-rail configuration. IC Role / Device Role / Timing Role: Quad-LDO provides isolated, low-noise, sequenced supplies for sensor pixel array and high-speed MIPI D-PHY interface. Use Value: 60µVrms noise prevents fixed-pattern noise in raw image data; independent EN control enables synchronized sensor initialization and power-down. |
Use Scenario: Supplying RF front-end (2.8V) and baseband processor I/O (1.5V) in compact access point PCB. IC Role / Device Role / Timing Role: Single-package solution replaces two discrete dual-LDOs, reducing footprint by 40% and eliminating inter-rail coupling paths. Use Value: 75dB PSRR suppresses 2.4GHz/5GHz switching noise from nearby DC-DC converters; thermal independence avoids RF chain shutdown during PA heating. |
| LPWAN Sensor Node | Industrial Camera System |
|
Use Scenario: Powering sub-GHz transceiver (2.8V) and microcontroller core (1.5V) in battery-operated NB-IoT node. IC Role / Device Role / Timing Role: Enables deep-sleep mode where EN1 disables MCU rail while EN2 keeps transceiver ready for wake-up events. Use Value: 160µA total quiescent current extends 10-year battery life; auto-discharge prevents leakage-induced wake-up false triggers. |
Use Scenario: Providing clean power to global shutter sensor (1.5V analog, 2.8V digital) and FPGA configuration I/O in factory automation camera. IC Role / Device Role / Timing Role: Delivers tightly regulated, low-noise rails with independent fault containment - thermal event on digital rail does not disrupt analog capture. Use Value: ±1% accuracy ensures consistent ADC reference and timing margin; per-channel OTP prevents system-wide failure during overcurrent faults. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad-LDO applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Torex XC6217D1528MR-G | Same 1.5V/2.8V dual-output pairing, but single-enable (no EN1/EN2 separation); 80µVrms noise; 65dB PSRR at 1kHz | Lacks independent rail control - unsuitable for staggered startup or domain isolation | Select if board space is constrained and rail sequencing is handled externally via MCU GPIOs |
| Ricoh RP512L1528-AE | 1.5V/2.8V outputs with dual-enable, but higher 220µA quiescent current; 55dB PSRR at 1kHz; no auto-discharge | No output discharge on disable - risks residual voltage affecting downstream logic states | Select if thermal shutdown independence is less critical than cost, and external pull-downs can manage discharge |
Compared with XC6217D1528MR-G and RP512L1528-AE, the AP7348D-1528RS4-7 uniquely combines per-channel thermal protection, 60µVrms noise, and true dual-enable control - making it the only option supporting fault-isolated, low-noise, sequenced dual-rail operation in space-constrained portable designs.
Availability
AP7348D-1528RS4-7 is available at Aetrix Electronics and suitable for smartphone camera modules, Wi-Fi 6E access points, and LPWAN sensor nodes requiring stable component supply, precise dual-rail voltage regulation, and long-term lifecycle continuity.
Supply support for AP7348D-1528RS4-7 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 high-reliability power management, signal integrity, and protection solutions for consumer, industrial, and automotive markets.
The AP7348 series belongs to Diodes' high-PSRR, low-noise LDO portfolio designed specifically for multi-rail power delivery in RF, imaging, and battery-powered edge devices where noise, accuracy, and thermal resilience are critical.
FAQ
What are the exact output voltages configured in AP7348D-1528RS4-7?
The AP7348D-1528RS4-7 is factory-configured with CH1 and CH3 delivering 1.5V (per "15" in part number), and CH2 and CH4 delivering 2.8V (per "28"). These are fixed outputs set by internal resistor networks - no external feedback components are required or supported. Output accuracy is guaranteed at ±1% over temperature and line/load conditions.
How does the dual-enable architecture improve system power management?
EN1 controls CH1 and CH3 (1.5V rails), while EN2 controls CH2 and CH4 (2.8V rails), enabling independent power gating of functionally distinct subsystems - for example, disabling the 1.5V sensor core while keeping the 2.8V communication interface active. This eliminates need for external logic or multiple discrete regulators, reducing BOM count and PCB area.
Is the thermal pad electrically connected, and how must it be handled in layout?
The exposed thermal pad is electrically isolated from all pins and may be left floating or connected to GND - but it must be soldered to a PCB copper pour for thermal performance. Failure to do so raises junction-to-ambient thermal resistance from 160°C/W to >250°C/W, risking premature thermal shutdown under 300mA load per channel.
Does AP7348D-1528RS4-7 support output capacitors smaller than 1µF?
Yes - the device is stable with ≥0.47µF ceramic output capacitors, as verified in the datasheet's ESR vs. output current graph. However, 1µF is recommended for full transient response across 1mA–300mA load steps. Using <0.47µF risks instability, especially with high-ESR capacitors or long PCB traces.
AP7348D-1528RS4-7 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):
- 1.5V, 1.5V, 2.8V, 2.8V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.53V @ 300mA, 0.53V @ 300mA, 0.34V @ 300mA, 0.34V @ 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-1528RS4-7 FAQ
1.How can I place an order for AP7348D-1528RS4-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP7348D-1528RS4-7 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-1528RS4-7 reliable?
The price and inventory of AP7348D-1528RS4-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP7348D-1528RS4-7 is usually 5 days.
3.What payment methods are accepted for AP7348D-1528RS4-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP7348D-1528RS4-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP7348D-1528RS4-7?
AP7348D-1528RS4-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP7348D-1528RS4-7 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-1528RS4-7?
For technical support, including AP7348D-1528RS4-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP7348D-1528RS4-7 requirements.
6.How does Aetrix verify that AP7348D-1528RS4-7 is sourced from the original manufacturer or authorized distributors?
All AP7348D-1528RS4-7 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-1528RS4-7 meets industry standards.
7.What is the process for return or replacement of AP7348D-1528RS4-7?
All AP7348D-1528RS4-7 units undergo pre-shipment inspection (PSI). If there is an issue with AP7348D-1528RS4-7, 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-1528RS4-7 part is unused and in its original packaging.
Return procedure for AP7348D-1528RS4-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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