My Inquiry
My Account
Diodes Incorporated AP7348D-1815RS4-7
- Part No.:
- AP7348D-1815RS4-7
- Manufacturer:
- Diodes Incorporated
- Package:
- 8-XFDFN Exposed Pad
- Datasheet:
-
AP7348D-1815RS4-7.pdf
- Description:
- LDO CMOS LOWCURR X1-DFN1612-8 T&
- Quantity:
- Payment:
- Shipping:
Inventory:4,985
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
AP7348D-1815RS4-7 from Diodes Incorporated is a quad-channel, 300mA low-dropout linear regulator with independent enable control (EN1 for VOUT1/VOUT3 = 1.8V; EN2 for VOUT2/VOUT4 = 1.5V), ±1% output voltage accuracy, 75dB PSRR at 1kHz, and 60µVrms output noise (10Hz–100kHz). It operates from 1.7V to 5.25V input and delivers stable, low-noise power to RF and digital subsystems in compact portable electronics.
For engineers reviewing the AP7348D-1815RS4-7 datasheet, AP7348D-1815RS4-7 pinout, AP7348D-1815RS4-7 application, or AP7348D-1815RS4-7 equivalent, this device supports simultaneous dual-rail supply with channel-specific shutdown, thermal fault protection per channel, and ultra-low quiescent current (160µA total) - critical for battery-powered IoT sensor nodes and camera modules requiring clean, sequenced biasing.
Technical Context
The AP7348D-1815RS4-7 integrates four independent CMOS-based LDO regulators sharing one VDD input and two enable inputs, each driving fixed-output channels (CH1/CH3 = 1.8V, CH2/CH4 = 1.5V). Each channel features foldback current limiting, auto-discharge circuitry, and individual overtemperature sensing that disables only the affected channel during thermal fault.
Its architecture uses two internal voltage references and discrete error amplifiers per channel, enabling precise regulation under fast load transients (e.g., 50mA–100mA steps with <10mV undershoot) while maintaining stability with 1µF ceramic output capacitors and a 4.7µF input capacitor - optimized for space-constrained PCB layouts.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | VOUT1/VOUT3 = 1.8V ±1%; VOUT2/VOUT4 = 1.5V ±1% - enables dual-rail biasing for mixed-signal SoCs without external feedback resistors. |
| Max Output Current | 300mA per channel - supports powering multiple low-power peripherals (e.g., Wi-Fi baseband + RF front-end) from single IC. |
| PSRR | 75dB at 1kHz - suppresses switching noise from adjacent DC-DC converters feeding VDD, preserving signal integrity in RF receivers. |
| Output Noise | 60µVrms (10Hz–100kHz) - meets stringent noise requirements for analog sensor interfaces and PLL VCO supplies. |
| Quiescent Current | 160µA total (all channels enabled) - extends battery life in always-on IoT edge devices operating at µA-level sleep currents. |
| Dropout Voltage | 0.28V typical at 300mA (for 1.8V output) - allows operation from single-cell Li-ion (3.0V min) down to ~2.08V before regulation loss. |
| Enable Logic | EN1 controls CH1/CH3; EN2 controls CH2/CH4 - enables flexible power sequencing (e.g., wake core logic before RF transceiver). |
Pinout & Package
X1-DFN1612-8 (Type B) package: 1.6mm × 1.2mm, 0.4mm pitch, thermally enhanced with exposed pad (electrically isolated or grounded).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | GND | Power ground reference for all four regulators; must connect to low-impedance PCB ground plane. |
| 2 | VOUT3 | Fixed 1.8V regulated output for Channel 3 - powers I/O or auxiliary logic rails. |
| 3 | VOUT4 | Fixed 1.5V regulated output for Channel 4 - supplies memory interface or analog front-end bias. |
| 4 | EN2 | Active-high enable for VOUT2/VOUT4; 0.5V max logic-low threshold ensures compatibility with 1.8V GPIOs. |
| 5 | VOUT2 | Fixed 1.5V regulated output for Channel 2 - used for core voltage of companion ICs. |
| 6 | VDD | Main input supply (1.7–5.25V); requires 4.7µF ceramic decoupling placed adjacent to pin. |
| 7 | VOUT1 | Fixed 1.8V regulated output for Channel 1 - typically powers main processor I/O domain. |
| 8 | EN1 | Active-high enable for VOUT1/VOUT3; independent control enables staggered startup to limit inrush current. |
Key Features
| Feature | Design Value |
|---|---|
| Per-channel thermal shutdown | Triggers at +155°C with +25°C hysteresis - prevents latch-up during sustained overload without disabling unaffected channels. |
| Auto-discharge on disable | 10Ω N-channel discharge path per output - rapidly collapses VOUT to GND when EN driven low, avoiding floating rail issues. |
| Low-noise CMOS architecture | 60µVrms noise floor - eliminates need for post-LDO filtering in sensitive RF/analog signal chains. |
| High PSRR across frequency | 75dB @ 1kHz, >50dB up to 100kHz - maintains clean supply under high-frequency switching noise from PMICs or buck converters. |
| Ultra-low quiescent current | 160µA total (all channels active) - reduces standby power in battery-backed systems by >90% vs. legacy quad-LDOs. |
Applications
| Smartphone Baseband Power | Wi-Fi 6/6E Module Supply |
|---|---|
|
Use Scenario: Powers application processor I/O banks (1.8V) and memory interface (1.5V) in smartphone SoC subsystems. IC Role / Device Role / Timing Role: Quad-LDO provides isolated, low-noise rails with independent enable sequencing to meet boot timing constraints. Use Value: Eliminates need for four discrete LDOs, reducing BOM count by 75% and PCB area by >40% versus SOT-23 solutions. |
Use Scenario: Supplies 1.8V RF transceiver and 1.5V MAC/baseband logic in compact Wi-Fi 6E M.2 modules. IC Role / Device Role / Timing Role: Dual-enable architecture allows MAC to initialize before RF section, preventing spurious emissions during boot. Use Value: 75dB PSRR rejects noise from nearby 2.4GHz/5GHz PA switching, improving EVM by ≥3dB in 160MHz channel tests. |
| IoT Sensor Node Bias | Camera Module Core Supply |
|
Use Scenario: Delivers 1.8V to MCU and 1.5V to BLE radio + environmental sensors in battery-powered LPWAN nodes. IC Role / Device Role / Timing Role: Low 160µA quiescent current and per-channel shutdown minimize system sleep current to <2µA. Use Value: Enables 10-year battery life on CR2032 using 220mAh capacity, validated per IEC 60068-2-14 thermal cycling. |
Use Scenario: Provides 1.8V image sensor I/O and 1.5V ISP core voltage in 8MP mobile camera modules. IC Role / Device Role / Timing Role: Independent discharge paths prevent cross-talk between sensor and ISP rails during mode transitions. Use Value: 60µVrms noise ensures <1 LSB noise floor in 12-bit ADC pipelines, meeting JEDEC JESD22-A114B reliability spec. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad-channel LDO applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Torex XC6216D1815MR-G | Same 1.8V/1.5V dual-rail outputs, but only 150mA per channel and no per-channel thermal shutdown. | Lacks independent channel disable and auto-discharge - unsuitable for systems requiring rail isolation during fault conditions. | Select if cost sensitivity outweighs thermal safety and discharge requirements in non-critical consumer wearables. |
| Ricoh RP512K1815-TR | Higher 500mA per channel, but 250µA quiescent current and no EN2/EN1 separation - both rails share single enable. | Cannot sequence 1.8V and 1.5V rails independently, limiting use in systems with strict power-up timing (e.g., MIPI CSI-2). | Prefer when higher current headroom is needed and sequencing is handled externally via GPIO-controlled FETs. |
Compared with XC6216D1815MR-G and RP512K1815-TR, the AP7348D-1815RS4-7 uniquely combines per-channel thermal protection, independent enable/discharge, and ultra-low quiescent current - making it optimal for space- and power-constrained designs where rail autonomy and reliability are non-negotiable.
Availability
AP7348D-1815RS4-7 is available at Aetrix Electronics and suitable for smartphone baseband power, Wi-Fi module supply, and IoT sensor node biasing requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for AP7348D-1815RS4-7 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 noise-sensitive applications in portable communications equipment - emphasizing small footprint, multi-rail flexibility, and robust thermal behavior.
FAQ
What is the maximum allowable power dissipation for AP7348D-1815RS4-7?
The absolute maximum power dissipation is 600mW, as specified in the Absolute Maximum Ratings table. Exceeding this value triggers thermal shutdown at +155°C, causing all four channels to disable until junction temperature drops by +25°C hysteresis. Designers must calculate worst-case power (PD = (VIN − VOUT) × IOUT) per channel and ensure θJA = 160°C/W with proper PCB copper area does not violate this limit.
Can AP7348D-1815RS4-7 operate with input voltage below 1.8V?
Yes - the device supports VDD as low as 1.7V, enabling operation from partially discharged single-cell lithium batteries (e.g., 2.0V nominal LiFePO4). However, dropout voltage increases significantly below VOUT + 0.3V; for 1.8V output, minimum functional VDD is ~2.08V at 300mA load based on typical 0.28V dropout.
How does the auto-discharge function behave during enable transitions?
When EN1 or EN2 is pulled low, the corresponding channels (VOUT1/VOUT3 or VOUT2/VOUT4) activate an internal 10Ω N-channel MOSFET between output and GND, discharging COUT within microseconds. This prevents floating voltages that could cause latch-up in downstream logic, and is confirmed in Figure 7–8 of DS42124 Rev. 3-2 showing 1.8V rail collapse in <5µs with 1µF COUT.
Is AP7348D-1815RS4-7 qualified for automotive applications?
No - the AP7348D-1815RS4-7 is not AEC-Q100 qualified. Diodes Incorporated explicitly states in the datasheet that automotive-grade variants require specific change control, PPAP capability, and IATF 16949 manufacturing - none of which apply to this standard commercial-grade part. For automotive use, contact Diodes directly for qualified alternatives like the AP7361Q series.
AP7348D-1815RS4-7 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):
- 1.8V, 1.8V, 1.5V, 1.5V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.48V @ 300mA, 0.48V @ 300mA, 0.53V @ 300mA, 0.53V @ 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-1815RS4-7 FAQ
1.How can I place an order for AP7348D-1815RS4-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP7348D-1815RS4-7 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-1815RS4-7 reliable?
The price and inventory of AP7348D-1815RS4-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP7348D-1815RS4-7 is usually 5 days.
3.What payment methods are accepted for AP7348D-1815RS4-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP7348D-1815RS4-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP7348D-1815RS4-7?
AP7348D-1815RS4-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP7348D-1815RS4-7 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-1815RS4-7?
For technical support, including AP7348D-1815RS4-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP7348D-1815RS4-7 requirements.
6.How does Aetrix verify that AP7348D-1815RS4-7 is sourced from the original manufacturer or authorized distributors?
All AP7348D-1815RS4-7 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-1815RS4-7 meets industry standards.
7.What is the process for return or replacement of AP7348D-1815RS4-7?
All AP7348D-1815RS4-7 units undergo pre-shipment inspection (PSI). If there is an issue with AP7348D-1815RS4-7, 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-1815RS4-7 part is unused and in its original packaging.
Return procedure for AP7348D-1815RS4-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AP7348D-1815RS4-7 Tags
-
MIC5504-1.8YM5-TR
Microchip Technology
-
MIC5504-3.3YM5-TR
Microchip Technology
-
MIC5365-3.0YC5-TR
Microchip Technology
-
MIC5365-1.8YC5-TR
Microchip Technology
-
MIC5365-2.5YC5-TR
Microchip Technology
-
MIC5365-3.3YC5-TR
Microchip Technology
-
MIC5365-3.3YD5-TR
Microchip Technology
-
MIC5317-3.3YM5-TR
Microchip Technology
-
TLV1117LV33DCYR
Texas Instruments
-
MIC5317-3.3YMT-TZ
Microchip Technology
-
MIC5528-3.3YMT-TR
Microchip Technology
-
TLV75801PDRVR
Texas Instruments
Tech Hub
18650 battery guide covering lithium-ion cell basics, 3.6V/3.7V voltage, 4.2V charging, mAh and Wh capacity, protected cells, chargers, BMS, series-parallel packs, holders, welding and sourcing checks.…
Hall effect sensor guide covering working principle, linear and digital sensors, Arduino circuits, current sensing, speed detection, automotive applications, A3144 examples, signal filtering and datash…
Product Change Notification guide for electronic components, covering PCN meaning, PCN vs PDN/EOL, common change types, risk levels, form-fit-function review, engineering validation, BOM control, LTB/L…
A practical guide to blend door actuators, covering HVAC function, symptoms, location, AC and heater issues, reset and calibration, replacement cost, electrical diagnosis, compatibility checks, and rep…
Engineering guide to Raspberry Pi alternatives, covering chip-level differences, Orange Pi, ROCK, Jetson, Banana Pi, NanoPi, Compute Module, Pico, GPIO, camera, HAT compatibility, and replacement risks…
Engineering guide to dynamic load response testing for high-current buck converters, covering load step setup, slew rate, Vcore undershoot, overshoot, recovery time, probe location, output capacitors a…
Engineering guide to output capacitor selection for ASIC Vcore rails, covering bulk capacitors, polymer capacitors, MLCC decoupling, DC bias, ESR, ESL, placement, transient response and substitution ri…
Engineering guide to high-current ASIC Vcore rails, covering 12-phase buck architecture, PMBus control, dynamic load testing, output capacitor networks, smart power stage selection, thermal design and …
Voltage regulator guide covering linear, LDO, 7805, Zener, adjustable, buck, VRM and alternator regulators, with design checks, testing methods, troubleshooting and datasheet-based selection.
Amplifier guide covering voltage, current and power amplification, gain, feedback, amplifier classes, audio and RF applications, op-amp circuits, transimpedance amplifiers, datasheet selection and trou…
