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Diodes Incorporated AP7346D-2818FS6-7
- Part No.:
- AP7346D-2818FS6-7
- Manufacturer:
- Diodes Incorporated
- Package:
- 6-XFDFN Exposed Pad
- Datasheet:
-
AP7346D-2818FS6-7.pdf
- Description:
- IC REG LIN 1.8V/2.8V X2DFN1212-6
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
AP7346D-2818FS6-7 from Diodes Incorporated is a dual-channel, high-accuracy current-limiting LDO regulator in X2-DFN1212-6 package, delivering fixed 2.8V and 1.8V outputs with ±1% accuracy, 75dB PSRR at 1kHz, and 60µVrms output noise (10Hz–100kHz). It features independent enable pins (EN1/EN2), low 35µA quiescent current (single-channel active), and integrated auto-discharge for rapid output shutdown - optimized for RF supply rails and camera modules in portable media devices.
For engineers reviewing the AP7346D-2818FS6-7 datasheet, AP7346D-2818FS6-7 pinout, AP7346D-2818FS6-7 application, or AP7346D-2818FS6-7 equivalent, key selection criteria include dual-output voltage pairing (2.8V/1.8V), channel-independent enable control, thermal performance in 1.2mm × 1.2mm DFN, current-limit accuracy (157mA ±25mA), and discharge functionality for power sequencing compliance.
Technical Context
The AP7346D-2818FS6-7 integrates two independent CMOS-based LDO regulators sharing a single VIN input and GND, each with dedicated EN control, fixed internal resistor networks for 2.8V and 1.8V outputs, and built-in short-circuit foldback limiting (~55mA) and thermal protection. Its architecture supports simultaneous or staggered channel activation without cross-regulation coupling.
Each channel delivers 130mA maximum output current with dropout as low as 0.22V (at 3.0V < VOUT ≤ 3.6V, IOUT = 120mA), while maintaining 0.1%/V line regulation and ≤30mV load regulation across 1–120mA. The device operates from 1.7V to 5.25V input and supports automotive-grade ambient range (−40°C to +85°C).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltages | 2.8V (Channel 1), 1.8V (Channel 2); fixed via internal resistor network - eliminates external feedback components and simplifies layout. |
| Output Accuracy | ±1% at +25°C, ±1.5% over −40°C to +85°C - ensures stable core and I/O rail voltages for precision analog and digital subsystems. |
| PSRR | 75dB at 1kHz - suppresses switching noise from upstream DC/DC converters feeding RF transceivers or image sensors. |
| Output Noise | 60µVrms (10Hz–100kHz) - minimizes phase noise in local oscillator supplies and jitter in high-speed serial interfaces. |
| Quiescent Current | 35µA (one channel active, no load) - extends battery life in always-on sensor or standby-mode subsystems. |
| Current Limit | 157mA ±25mA per channel - provides predictable fault current during short circuits while avoiding nuisance tripping under transient loads. |
| Enable Thresholds | EN high ≥1.3V, EN low ≤0.5V - compatible with 1.8V/2.8V/3.3V GPIO logic without level-shifting. |
Pinout & Package
X2-DFN1212-6 package: 1.2mm × 1.2mm body, 0.4mm pitch, 0.39mm height, thermal pad exposed on bottom for PCB copper area connection to GND or floating (not used as primary GND electrode).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VOUT1 | 2.8V regulated output - connects directly to load requiring stable 2.8V supply (e.g., RF front-end bias). |
| 2 | VOUT2 | 1.8V regulated output - powers low-voltage digital cores (e.g., image signal processor I/O or memory interface). |
| 3 | GND | Common ground reference for both regulators and decoupling capacitors - must be low-impedance path to system ground plane. |
| 4 | EN2 | Active-high enable for Channel 2 (1.8V) - controls power-up sequencing of 1.8V domain independently of 2.8V rail. |
| 5 | VIN | Shared input supply (1.7V–5.25V) - requires ≥0.47µF ceramic capacitor placed adjacent to pin for stability. |
| 6 | EN1 | Active-high enable for Channel 1 (2.8V) - enables independent power gating of RF supply before or after digital domain activation. |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent enable inputs | EN1 and EN2 allow precise power sequencing - e.g., delay 1.8V domain activation until 2.8V rail stabilizes, preventing latch-up in mixed-voltage ICs. |
| Built-in output auto-discharge | Internal 50Ω N-channel discharge path per channel rapidly collapses VOUT when EN is pulled low - eliminates hold-up time and meets fast-power-down requirements in USB-C or MIPI systems. |
| Low-noise, high-PSRR regulation | 75dB PSRR at 1kHz + 60µVrms noise enables clean supply for noise-sensitive analog blocks like ADCs, PLLs, or RF synthesizers without additional filtering. |
| High-accuracy current limit | 157mA ±25mA per channel ensures consistent fault protection across temperature - avoids overdesign of downstream current-sense circuitry in battery-powered designs. |
| Ultra-small footprint | X2-DFN1212-6 (1.2mm × 1.2mm) saves >60% board area vs. SOT-23-6 - critical for space-constrained camera modules and fingerprint sensors. |
Applications
| Fingerprint Modules | Smartphone Camera Systems |
|---|---|
|
Use Scenario: Powering capacitive fingerprint sensor ASIC and its analog front-end during biometric capture. IC Role / Device Role / Timing Role: Dual LDO supplies 2.8V for sensor bias and 1.8V for digital interface (SPI/I²C), with independent EN control enabling wake-on-touch sequencing. Use Value: Low 60µVrms noise prevents false touch detection; ±1% accuracy maintains sensor linearity across temperature; auto-discharge ensures rapid reset between scans. |
Use Scenario: Providing clean, sequenced power to image sensor (1.8V I/O) and lens actuator driver (2.8V bias) in mobile phone rear cameras. IC Role / Device Role / Timing Role: Regulator channels deliver isolated, low-noise rails with EN1/EN2 enabling staggered startup to avoid inrush current peaks during camera initialization. Use Value: 75dB PSRR rejects noise from baseband processor switching; 35µA quiescent current extends standby battery life; X2-DFN1212-6 fits within tight camera module height constraints. |
| RF Front-End Modules | Portable Media Players |
|
Use Scenario: Supplying 2.8V to PA driver stage and 1.8V to RF switch control logic in Bluetooth/Wi-Fi combo modules. IC Role / Device Role / Timing Role: Dual LDO replaces discrete regulators and ferrite-bead filters - EN2 enables dynamic shutdown of 1.8V logic during transmit gaps to reduce average power. Use Value: 130mA per channel supports peak PA current demands; low dropout (0.26V at 2.1V < VOUT ≤ 2.5V) maximizes efficiency from 3.3V battery rail. |
Use Scenario: Powering audio codec (1.8V) and display driver IC (2.8V) in handheld music/video players with Li-ion battery input. IC Role / Device Role / Timing Role: Single-chip dual LDO reduces BOM count and PCB area versus two separate SOT-23 regulators - EN1/EN2 support software-controlled power domains. Use Value: ±1.5% accuracy over −40°C to +85°C ensures consistent audio DAC performance and display gamma across operating conditions; RoHS/Green compliance meets consumer electronics regulations. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-output LDO applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AP7345D-2818FS6-7 | Successor part with identical pinout, same 2.8V/1.8V outputs, improved current limit accuracy (±15mA vs. ±25mA), lower 25µA quiescent current (single-channel active). | Designed for new designs where tighter OCP tolerance and lower IQ improve battery runtime and fault predictability. | Select AP7345D-2818FS6-7 for new designs; AP7346D-2818FS6-7 remains viable for legacy production continuity. |
| Torex XC6216D2818MR-G | 2.8V/1.8V dual LDO in SOT-25 package; higher 100µA quiescent current, no auto-discharge, 65dB PSRR at 1kHz, ±2% output accuracy. | Lacks independent EN pins and discharge function - requires external MOSFETs for sequencing and discharge, increasing complexity and board area. | Choose only if X2-DFN1212-6 footprint is unavailable and discharge functionality is not required. |
Compared with AP7345D-2818FS6-7, this part offers proven reliability in existing designs but trades off tighter current limit control and lower IQ; versus XC6216D2818MR-G, it delivers superior noise/PSRR performance, smaller footprint, and integrated sequencing/discharge - reducing external component count by up to 6 passive devices.
Availability
AP7346D-2818FS6-7 is available at Aetrix Electronics and suitable for fingerprint modules, smartphone camera systems, and RF front-end modules requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for AP7346D-2818FS6-7 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 communications markets.
The AP7346 belongs to Diodes' high-accuracy dual-LDO product line, engineered specifically for space-constrained portable electronics requiring independent, low-noise, sequenced power rails with minimal external components.
FAQ
What is the thermal pad on the AP7346D-2818FS6-7 used for, and how should it be connected?
The thermal pad on the underside of the X2-DFN1212-6 package improves heat dissipation and must be connected to a large PCB copper area tied to GND or left floating - it is not a functional GND electrode. Using ≥200mm² copper with multiple thermal vias significantly lowers junction-to-ambient thermal resistance, enabling full 130mA per channel operation at +85°C ambient without derating.
Can AP7346D-2818FS6-7 operate with input voltage below 2.0V?
Yes - the AP7346D-2818FS6-7 supports input voltages as low as 1.7V, enabling direct operation from single-cell Li-ion batteries down to end-of-discharge (≈2.8V) or from 1.8V logic rails with sufficient headroom. At VIN = 1.7V, the 1.8V channel achieves ~0.29V dropout (per datasheet Table 1), allowing stable 1.8V output with 120mA load.
How does the auto-discharge function work, and what is its typical discharge time?
When EN1 or EN2 is pulled low, an internal 50Ω N-channel MOSFET connects the corresponding VOUT pin to GND, discharging external output capacitance. With 1µF COUT, typical discharge time to 10% of nominal voltage is <100µs - verified in Figure 9 of DS38082 Rev. 2-3. This eliminates need for external discharge resistors and ensures fast power-down compliance in MIPI or USB PD applications.
Is AP7346D-2818FS6-7 qualified for automotive applications?
No - AP7346D-2818FS6-7 is not AEC-Q100 qualified. Diodes offers automotive-grade variants (e.g., AP7346Q series) with PPAP capability, IATF 16949 manufacturing, and extended temperature screening (−40°C to +125°C), but this specific part number is intended for commercial portable electronics. Use only in automotive systems after full qualification testing and failure mode analysis.
AP7346D-2818FS6-7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- 6-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):
- 1.8V, 2.8V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.39V @ 120mA, 0.3V @ 120mA
- Current - Output:
- 130mA, 130mA
- Current - Quiescent (Iq):
- 100 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-DFN1212-6
AP7346D-2818FS6-7 FAQ
1.How can I place an order for AP7346D-2818FS6-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP7346D-2818FS6-7 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 AP7346D-2818FS6-7 reliable?
The price and inventory of AP7346D-2818FS6-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP7346D-2818FS6-7 is usually 5 days.
3.What payment methods are accepted for AP7346D-2818FS6-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP7346D-2818FS6-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP7346D-2818FS6-7?
AP7346D-2818FS6-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP7346D-2818FS6-7 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 AP7346D-2818FS6-7?
For technical support, including AP7346D-2818FS6-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP7346D-2818FS6-7 requirements.
6.How does Aetrix verify that AP7346D-2818FS6-7 is sourced from the original manufacturer or authorized distributors?
All AP7346D-2818FS6-7 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 AP7346D-2818FS6-7 meets industry standards.
7.What is the process for return or replacement of AP7346D-2818FS6-7?
All AP7346D-2818FS6-7 units undergo pre-shipment inspection (PSI). If there is an issue with AP7346D-2818FS6-7, 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 AP7346D-2818FS6-7 part is unused and in its original packaging.
Return procedure for AP7346D-2818FS6-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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