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Diodes Incorporated AP7348D-3018RS4-7
- Part No.:
- AP7348D-3018RS4-7
- Manufacturer:
- Diodes Incorporated
- Package:
- 8-XFDFN Exposed Pad
- Datasheet:
-
AP7348D-3018RS4-7.pdf
- Description:
- LDO CMOS LOWCURR X1-DFN1612-8 T&
- Quantity:
- Payment:
- Shipping:
Inventory:3,158
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Product details
Overview
AP7348D-3018RS4-7 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 on Channel 1 & 3 and 1.8V on Channel 2 & 4, targeting multi-rail power management in compact portable electronics.
For engineers reviewing the AP7348D-3018RS4-7 datasheet, AP7348D-3018RS4-7 pinout, AP7348D-3018RS4-7 application, or AP7348D-3018RS4-7 equivalent, this device supports simultaneous dual-voltage rail generation with thermal shutdown per channel, foldback current limiting, and auto-discharge functionality - critical for battery-powered IoT sensor nodes and camera modules requiring fast power sequencing and low-noise analog supply rails.
Technical Context
The AP7348D-3018RS4-7 integrates two independent voltage references and four CMOS-based LDO channels, each with dedicated error amplifiers, foldback current limiters, and discharge circuits. Its dual-enable architecture allows grouped control: EN1 activates VOUT1 (3.0V) and VOUT3 (3.0V); EN2 activates VOUT2 (1.8V) and VOUT4 (1.8V).
Each channel features independent over-temperature sensing (trip at +155°C, hysteresis +25°C), and thermal shutdown disables all four outputs. The device operates from 1.7V to 5.25V input, supports up to 300mA per channel, and maintains stability with 1µF ceramic output capacitors - optimized for space-constrained RF and imaging subsystems where PSRR and noise directly impact signal integrity.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 3.0V (CH1 & CH3), 1.8V (CH2 & CH4); fixed, non-adjustable - enables dual-rail system-on-module power without external resistors. |
| Output Accuracy | ±1% at +25°C - ensures tight regulation for sensitive analog circuitry like ADC reference supplies or RF synthesizer VCOs. |
| PSRR | 75dB at 1kHz - suppresses switching noise from upstream DC/DC converters feeding noisy digital domains. |
| Output Noise | 60µVrms (10Hz–100kHz) - meets low-noise requirements for image sensor analog front-ends and precision audio bias rails. |
| Quiescent Current | 160µA total (all channels enabled) - extends battery life in always-on IoT edge nodes with intermittent sensor wake-up cycles. |
| Dropout Voltage | 0.25V (at 300mA, VOUT = 3.0V) - allows operation from single-cell Li-ion (3.0V min) while maintaining full load capability. |
| Thermal Shutdown | +155°C threshold with +25°C hysteresis - prevents latch-up during transient overload in sealed handheld enclosures. |
Pinout & Package
X1-DFN1612-8 (Type B) package: 1.6mm × 1.2mm, 0.4mm pitch, exposed thermal pad (electrically isolated, recommended grounded for thermal performance).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 GND | Ground reference | Primary return path for all four channels; must connect to low-impedance PCB ground plane. |
| 2 VOUT3 | Channel 3 output | Fixed 3.0V regulated output; shares EN1 control with VOUT1 and requires local 1µF ceramic decoupling. |
| 3 VOUT4 | Channel 4 output | Fixed 1.8V regulated output; shares EN2 control with VOUT2 and supports high-speed digital I/O supply. |
| 4 EN2 | Enable input (CH2 & CH4) | Active-high logic; drives high (>1.3V) to enable VOUT2/VOUT4; pulls low (<0.5V) for fast discharge and zero-quiescent shutdown. |
| 5 VOUT2 | Channel 2 output | Fixed 1.8V regulated output; paired with VOUT4 under EN2 control for dual-core processor I/O rails. |
| 6 VDD | Input power supply | Common input for all channels; requires 4.7µF ceramic capacitor placed adjacent to pin for transient immunity. |
| 7 VOUT1 | Channel 1 output | Fixed 3.0V regulated output; shares EN1 control with VOUT3; used for analog subsystems or PMIC interface rails. |
| 8 EN1 | Enable input (CH1 & CH3) | Active-high logic; enables/disables VOUT1/VOUT3 independently of CH2/CH4 - enables staggered power-up sequencing. |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent enable inputs | EN1 controls VOUT1/VOUT3 (3.0V); EN2 controls VOUT2/VOUT4 (1.8V) - enables flexible power sequencing for SoC + peripheral subsystems. |
| Per-channel thermal shutdown | Each LDO shuts down individually at +155°C; all channels disabled simultaneously during fault - prevents cascading failure in dense layouts. |
| Auto-discharge on disable | Internal 10Ω N-channel FET discharges output caps when ENx = low - eliminates hold-up voltage that could delay system reset or cause latch-up. |
| Low-noise CMOS architecture | 60µVrms noise floor with no external bypass capacitor required - simplifies layout for noise-sensitive RF receivers and image sensors. |
| High PSRR across frequency | 75dB at 1kHz, maintained >50dB up to 100kHz - rejects ripple from switching regulators operating at 500kHz–2MHz without additional filtering. |
Applications
| Smartphone Camera Module | Wi-Fi 6 IoT Gateway |
|---|---|
|
Use Scenario: Dual-rail power for CMOS image sensor (3.0V analog core, 1.8V digital interface) and ISP processing block. IC Role / Device Role / Timing Role: Quad-LDO provides isolated, low-noise, sequenced supplies - VOUT1/VOUT3 power sensor analog front-end; VOUT2/VOUT4 power MIPI D-PHY interface and ISP I/O. Use Value: 60µVrms noise prevents fixed-pattern noise in raw image data; independent EN pins allow sensor initialization before ISP boot. |
Use Scenario: Powering Wi-Fi 6 transceiver IC (1.8V I/O, 3.0V RF PA bias) and baseband processor auxiliary rails. IC Role / Device Role / Timing Role: AP7348D-3018RS4-7 delivers clean, separated 1.8V and 3.0V rails with fast enable/disable for duty-cycled RF transmission. Use Value: 75dB PSRR suppresses DC/DC converter switching noise at 2.4GHz/5GHz bands; auto-discharge prevents residual voltage from interfering with RF calibration routines. |
| LPWAN Sensor Node | Industrial Camera Control Unit |
|
Use Scenario: Battery-powered NB-IoT node with ultra-low-power MCU (1.8V), RF front-end (3.0V), and analog sensor interface. IC Role / Device Role / Timing Role: Single-package quad-LDO replaces discrete regulators; EN1/EN2 selectively power RF and sensor subsystems during sleep/wake cycles. Use Value: 160µA total quiescent current extends 10-year battery life; ±1% accuracy ensures consistent ADC reference and sensor excitation voltage. |
Use Scenario: Embedded vision system in factory automation using global-shutter CMOS sensor with analog supply (3.0V), digital core (1.8V), and timing controller. IC Role / Device Role / Timing Role: Provides stable, low-noise dual-rail supply with thermal monitoring - critical for continuous 24/7 operation in unventilated enclosures. Use Value: Per-channel OTP detection prevents thermal runaway during extended exposure modes; 0.25V dropout enables use with aging LiFePO4 batteries (2.8V min). |
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 XC6216D3018MR-G | Same 3.0V/1.8V dual-output configuration; lower PSRR (65dB @ 1kHz); no per-channel thermal shutdown. | Lacks independent channel fault isolation - unsuitable for safety-critical imaging systems requiring fault containment. | Select if cost sensitivity outweighs thermal fault granularity and PSRR margin. |
| Ricoh RP517K3018D-TR-F | Higher quiescent current (220µA total); includes soft-start but no auto-discharge; ±2% output accuracy. | No output discharge on disable - risks residual voltage causing bus contention in hot-plug camera interfaces. | Prefer only when soft-start is mandatory and system-level discharge circuitry is already present. |
Compared with XC6216D3018MR-G and RP517K3018D-TR-F, the AP7348D-3018RS4-7 uniquely combines per-channel thermal protection, auto-discharge, and industry-leading 75dB PSRR - making it optimal for compact, thermally constrained, noise-sensitive imaging and wireless edge devices where reliability and signal integrity are non-negotiable.
Availability
AP7348D-3018RS4-7 is available at Aetrix Electronics and suitable for smartphone camera modules, Wi-Fi 6 IoT gateways, and LPWAN sensor nodes requiring stable component supply, long-lifecycle support, and RoHS-compliant packaging.
Supply support for AP7348D-3018RS4-7 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 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 space-constrained portable electronics - emphasizing thermal robustness, sequencing flexibility, and noise immunity for imaging and wireless subsystems.
FAQ
What are the exact output voltages configured in AP7348D-3018RS4-7?
The part number suffix "3018" explicitly defines the output configuration: Channel 1 and Channel 3 deliver a fixed 3.0V output, while Channel 2 and Channel 4 deliver a fixed 1.8V output. These values are laser-trimmed during manufacturing and cannot be adjusted externally. No external feedback resistors are required or supported.
Does AP7348D-3018RS4-7 support independent enable for all four channels?
No - it supports grouped enable only: EN1 controls both VOUT1 and VOUT3 (3.0V rails), while EN2 controls both VOUT2 and VOUT4 (1.8V rails). There is no provision for individual channel enable/disable. This architecture reduces pin count and simplifies sequencing for dual-voltage SoC subsystems.
Can AP7348D-3018RS4-7 operate from a 2.5V input supply?
Yes - the device supports input voltages from 1.7V to 5.25V. At 2.5V input, it can sustain full 300mA load on the 1.8V outputs (dropout ~0.26V), but cannot regulate the 3.0V outputs, as minimum input for 3.0V is 3.25V (VOUT + dropout). Operation must respect per-channel dropout limits specified in the datasheet.
Is the thermal pad electrically connected internally?
No - the exposed thermal pad on the X1-DFN1612-8 (Type B) package is electrically isolated from all internal circuitry. It may be left floating or connected to PCB ground for improved thermal dissipation, but it does not replace the requirement for Pin 1 (GND) connection. Soldering the pad improves θJA by ~30°C/W.
AP7348D-3018RS4-7 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, 1.8V, 1.8V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.33V @ 300mA, 0.33V @ 300mA, 0.48V @ 300mA, 0.48V @ 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-3018RS4-7 FAQ
1.How can I place an order for AP7348D-3018RS4-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP7348D-3018RS4-7 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-3018RS4-7 reliable?
The price and inventory of AP7348D-3018RS4-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP7348D-3018RS4-7 is usually 5 days.
3.What payment methods are accepted for AP7348D-3018RS4-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP7348D-3018RS4-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP7348D-3018RS4-7?
AP7348D-3018RS4-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP7348D-3018RS4-7 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-3018RS4-7?
For technical support, including AP7348D-3018RS4-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP7348D-3018RS4-7 requirements.
6.How does Aetrix verify that AP7348D-3018RS4-7 is sourced from the original manufacturer or authorized distributors?
All AP7348D-3018RS4-7 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-3018RS4-7 meets industry standards.
7.What is the process for return or replacement of AP7348D-3018RS4-7?
All AP7348D-3018RS4-7 units undergo pre-shipment inspection (PSI). If there is an issue with AP7348D-3018RS4-7, 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-3018RS4-7 part is unused and in its original packaging.
Return procedure for AP7348D-3018RS4-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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