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Diodes Incorporated AP7346D-1828FS6-7
- Part No.:
- AP7346D-1828FS6-7
- Manufacturer:
- Diodes Incorporated
- Package:
- 6-XFDFN Exposed Pad
- Datasheet:
-
AP7346D-1828FS6-7.pdf
- Description:
- IC REG LIN 1.8V/2.8V X2DFN1212-6
- Quantity:
- Payment:
- Shipping:
Inventory:9,193
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Product details
Overview
AP7346D-1828FS6-7 from Diodes Incorporated is a dual-channel, high-accuracy current-limiting LDO regulator in X2-DFN1212-6 package, delivering fixed 1.8V and 2.8V 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 per active channel, and integrated auto-discharge for rapid output voltage decay during shutdown - optimized for RF supply rails and camera modules in space-constrained portable electronics.
For engineers reviewing the AP7346D-1828FS6-7 datasheet, AP7346D-1828FS6-7 pinout, AP7346D-1828FS6-7 application, or AP7346D-1828FS6-7 equivalent, key selection criteria include dual-output voltage pairing, channel-independent enable control, thermal performance in 1.2mm × 1.2mm DFN, current-limit accuracy (157mA ±25mA), and discharge functionality for system-level power sequencing compliance.
Technical Context
The AP7346D-1828FS6-7 integrates two independent CMOS-based LDO regulators sharing a single VIN input but featuring separate EN1/EN2 controls and VOUT1/VOUT2 outputs. Each channel includes a precision voltage reference, error amplifier, fold-back current limit circuit (132–182mA), and NMOS pass transistor with 50Ω on-resistance for auto-discharge.
It operates across 1.7V–5.25V input range with dropout voltages as low as 0.22V (at 3.0V < VOUT ≤ 3.6V, IOUT = 120mA) and supports stable operation with 0.47µF ceramic output capacitors. Thermal management relies on the exposed thermal pad, recommended to be connected to GND via large copper area - not used as sole GND electrode.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VOUT1 / VOUT2 | Fixed 1.8V and 2.8V outputs - eliminates external feedback resistors and ensures consistent rail generation for baseband and RF subsystems. |
| Output Accuracy | ±1% at +25°C, ±1.5% over −40°C to +85°C - enables reliable operation of voltage-sensitive analog circuits without calibration. |
| PSRR | 75dB at 1kHz - suppresses switching noise from adjacent DC-DC converters feeding shared input rails. |
| Output Noise | 60µVrms (10Hz–100kHz) - minimizes phase noise impact on RF transceivers and clock buffers. |
| Quiescent Current | 35µA per active channel - extends battery life in always-on sensor or standby modes. |
| Current Limit | 157mA ±25mA per channel - provides predictable short-circuit protection without requiring external current-sense components. |
| Enable Thresholds | EN high ≥1.3V, EN low ≤0.5V - compatible with 1.8V/3.3V GPIOs without level-shifting. |
Pinout & Package
X2-DFN1212-6 package: 1.2mm × 1.2mm body, 0.4mm pitch, 6-pin layout with exposed thermal pad (not electrically functional as GND electrode alone).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 VOUT1 | Channel 1 regulated output | Delivers fixed 1.8V to baseband processor core or memory I/O rail; requires local 0.47µF ceramic capacitor. |
| 2 VOUT2 | Channel 2 regulated output | Delivers fixed 2.8V to RF front-end or camera sensor analog supply; independent from VOUT1 load transients. |
| 3 GND | Power ground reference | Common return path for both regulators; must connect to low-impedance PCB ground plane near input/output caps. |
| 4 EN2 | Channel 2 enable control | Active-high logic input; drives VOUT2 into shutdown when pulled low (<0.5V); must not float. |
| 5 VIN | Input power supply | Shared 1.7–5.25V input for both channels; requires 0.47µF ceramic decoupling capacitor placed adjacent to pin. |
| 6 EN1 | Channel 1 enable control | Active-high logic input; independently controls VOUT1; enables staggered power-up sequencing with EN2. |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent enable inputs | EN1 and EN2 allow asynchronous startup/shutdown of 1.8V and 2.8V rails - critical for power-state coordination in mobile SoC subsystems. |
| Integrated auto-discharge | 50Ω NMOS discharge path per channel rapidly collapses VOUT during disable - prevents floating supplies and meets USB/MIPI power sequencing requirements. |
| Ultra-low noise & high PSRR | 60µVrms noise + 75dB PSRR at 1kHz - sustains signal integrity in RF receiver chains and high-resolution ADC reference paths. |
| Wide input voltage range | 1.7V–5.25V operation supports direct connection to Li-ion battery (2.7–4.2V), USB 3.3V, or buck converter outputs. |
| Small-footprint packaging | X2-DFN1212-6 (1.2mm × 1.2mm) reduces PCB area by >50% vs. SOT-23-6 - enables dense placement near processors and sensors. |
Applications
| Fingerprint Module Power | Smartphone Camera Subsystem |
|---|---|
|
Use Scenario: Powering capacitive fingerprint sensor IC and its analog front-end during biometric capture. IC Role / Device Role / Timing Role: Dual LDO providing clean 1.8V digital core supply and 2.8V analog sensor bias - with independent EN control enabling on-demand activation. Use Value: Low 60µVrms noise prevents false touch detection; ±1% accuracy ensures consistent sensor response across temperature. |
Use Scenario: Supplying image signal processor (ISP) I/O and CMOS image sensor analog rail in compact smartphone camera modules. IC Role / Device Role / Timing Role: Delivers tightly regulated 1.8V (ISP interface) and 2.8V (sensor analog) with fast load transient response (<100µs recovery). Use Value: 75dB PSRR isolates sensor analog supply from noisy SoC switching noise; auto-discharge prevents ghost images during mode transitions. |
| RF Transceiver Bias | Wireless Adapter Core Logic |
|
Use Scenario: Generating low-noise bias for LTE/Wi-Fi RF power amplifiers and low-noise amplifiers in M.2 wireless cards. IC Role / Device Role / Timing Role: Provides isolated 2.8V PA supply and 1.8V LNA digital control rail - each with dedicated enable for dynamic power gating. Use Value: 157mA ±25mA current limit protects PA stages during impedance mismatch; 0.22V dropout at 3.0V+ outputs maximizes efficiency. |
Use Scenario: Powering Bluetooth/Wi-Fi SoC core logic and peripheral interfaces in USB dongles and embedded IoT adapters. IC Role / Device Role / Timing Role: Dual fixed-output LDO replaces discrete regulators and saves board space in 12mm × 12mm adapter PCBs. Use Value: 35µA quiescent current per channel extends battery life in sleep mode; X2-DFN1212-6 footprint allows placement under connector shrouds. |
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-1828FS6-7 | Successor device with identical pinout, same 1.8V/2.8V outputs, improved current limit tolerance (±15mA vs. ±25mA), and enhanced thermal derating above 70°C. | Recommended for new designs per Diodes' notice; supports same PCB layout but offers tighter OCP spec and extended reliability data. | Select AP7345D-1828FS6-7 for production ramp; AP7346D-1828FS6-7 remains valid for legacy BOM continuity. |
| Torex XC6210B182MR-G | Single-channel 1.8V LDO in USP-6B package; no 2.8V output or dual-enable capability; 45µVrms noise, 70dB PSRR at 1kHz. | Requires two separate devices to replicate dual-rail function - increases component count, PCB area, and routing complexity. | Only viable if redesign permits splitting rails and accepting higher assembly cost and larger footprint. |
Compared with AP7345D-1828FS6-7, this part offers identical functionality but looser current-limit tolerance and older qualification data; versus XC6210B182MR-G, it delivers true dual-rail integration with coordinated enable and discharge - reducing system-level design effort and bill-of-materials count.
Availability
AP7346D-1828FS6-7 is available at Aetrix Electronics and suitable for fingerprint modules, smartphone camera subsystems, and RF transceiver bias applications requiring stable component supply, long-term lifecycle support, and traceable sourcing for industrial and consumer OEM programs.
Supply support for AP7346D-1828FS6-7 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 AP7346 series belongs to Diodes' high-accuracy dual-LDO product line, designed specifically for multi-rail power delivery in portable communication equipment where board space, noise sensitivity, and sequencing control are critical constraints.
FAQ
Is AP7346D-1828FS6-7 pin-compatible with AP7345D-1828FS6-7?
Yes - both parts share identical X2-DFN1212-6 package, pin assignment, and electrical interface. The AP7345D is a direct functional upgrade with tighter current-limit specification (±15mA vs. ±25mA) and updated thermal performance data, allowing drop-in replacement in existing layouts without redesign.
What is the role of the thermal pad in the X2-DFN1212-6 package?
The exposed thermal pad improves heat dissipation by conducting junction heat to the PCB ground plane. It must be connected to a large copper area tied to GND - but cannot serve as the sole GND electrode; the dedicated Pin 3 (GND) remains the primary ground reference for regulation stability and noise control.
Can EN1 and EN2 be tied together for simultaneous control?
Yes - EN1 and EN2 may be connected to a common GPIO or power rail to enable/disable both outputs synchronously. However, doing so forfeits independent sequencing capability; for staggered startup (e.g., powering digital core before analog sensor), separate EN routing is required.
Does AP7346D-1828FS6-7 support reverse-current blocking?
No - the device lacks internal reverse-current blocking diodes. If reverse voltage can appear at VOUT1 or VOUT2 (e.g., from backup supplies or cross-coupled rails), external Schottky diodes must be added to prevent backfeed into the LDO pass elements and potential damage.
AP7346D-1828FS6-7 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-1828FS6-7 FAQ
1.How can I place an order for AP7346D-1828FS6-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP7346D-1828FS6-7 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-1828FS6-7 reliable?
The price and inventory of AP7346D-1828FS6-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP7346D-1828FS6-7 is usually 5 days.
3.What payment methods are accepted for AP7346D-1828FS6-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP7346D-1828FS6-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP7346D-1828FS6-7?
AP7346D-1828FS6-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP7346D-1828FS6-7 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-1828FS6-7?
For technical support, including AP7346D-1828FS6-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP7346D-1828FS6-7 requirements.
6.How does Aetrix verify that AP7346D-1828FS6-7 is sourced from the original manufacturer or authorized distributors?
All AP7346D-1828FS6-7 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-1828FS6-7 meets industry standards.
7.What is the process for return or replacement of AP7346D-1828FS6-7?
All AP7346D-1828FS6-7 units undergo pre-shipment inspection (PSI). If there is an issue with AP7346D-1828FS6-7, 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-1828FS6-7 part is unused and in its original packaging.
Return procedure for AP7346D-1828FS6-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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