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Diodes Incorporated AP7346D-3018FS6-7
- Part No.:
- AP7346D-3018FS6-7
- Manufacturer:
- Diodes Incorporated
- Package:
- 6-XFDFN Exposed Pad
- Datasheet:
-
AP7346D-3018FS6-7.pdf
- Description:
- IC REG LIN 1.8V/3V X2DFN1212-6
- Quantity:
- Payment:
- Shipping:
Inventory:4,920
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Product details
Overview
AP7346D-3018FS6-7 from Diodes Incorporated is a dual-channel, high-accuracy current-limiting LDO regulator in X2-DFN1212-6 package, delivering fixed 3.0V and 1.8V outputs with ±1% voltage accuracy, 157mA ±25mA current limit per channel, and 75dB PSRR at 1kHz. It supports low-power portable applications including RF supplies and camera modules where tight regulation, low noise (60µVrms), and independent enable control are critical.
For engineers reviewing the AP7346D-3018FS6-7 datasheet, AP7346D-3018FS6-7 pinout, AP7346D-3018FS6-7 application, or AP7346D-3018FS6-7 equivalent, key selection considerations include dual-output voltage pairing, independent EN1/EN2 control logic, thermal-pad-aware PCB layout, and compatibility with 0.47µF ceramic output capacitors for transient stability.
Technical Context
The AP7346D-3018FS6-7 integrates two independent CMOS-based LDO regulators sharing a single VIN input but featuring separate EN1/EN2 enable inputs and VOUT1/VOUT2 outputs. Each channel includes internal voltage reference, error amplifier, fold-back current limiting (132–182mA), and auto-discharge circuitry via integrated 50Ω N-channel FETs.
It operates across 1.7V–5.25V input range with dropout as low as 0.22V at 3.0V output (120mA load), achieves 60µVrms output noise (10Hz–100kHz), and maintains ±1.5% total output accuracy over −40°C to +85°C ambient - enabled by low 35µA quiescent current in single-channel active mode.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltages | Fixed 3.0V (Channel 1) and 1.8V (Channel 2); eliminates external feedback resistors and simplifies power rail generation for mixed-voltage SoCs. |
| VOUT Accuracy | ±1% at +25°C, ±1.5% over −40°C to +85°C; ensures stable core and I/O rail compliance for precision analog and digital subsystems. |
| Current Limit | 157mA ±25mA per channel with fold-back protection; limits fault current during short-circuit while preserving thermal margin in compact layouts. |
| PSRR | 75dB at 1kHz; suppresses switching noise from upstream DC/DC converters feeding RF or sensor signal chains. |
| Output Noise | 60µVrms (10Hz–100kHz); minimizes jitter and SNR degradation in ADCs, PLLs, and high-resolution imaging sensors. |
| Quiescent Current | 35µA (one channel active, no load); extends battery life in always-on subsystems such as fingerprint sensors or wake-on-event circuits. |
| Dropout Voltage | 0.22V max at 3.0V/120mA; enables operation from single-cell Li-ion (3.0V min) or regulated 3.3V rails with headroom margin. |
Pinout & Package
X2-DFN1212-6 package: 1.2mm × 1.2mm footprint, 0.4mm height, thermally enhanced with exposed pad (non-functional GND tie recommended).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VOUT1 | Regulated 3.0V output; requires local 0.47µF ceramic capacitor placed adjacent to pin and GND for stability and transient response. |
| 2 | VOUT2 | Regulated 1.8V output; independently decoupled; supports low-noise digital core supply without cross-regulation coupling. |
| 3 | GND | Analog/digital ground reference; must connect to low-impedance PCB ground plane; thermal pad should be tied to GND copper area for heat dissipation. |
| 4 | EN2 | Active-high enable for Channel 2 (1.8V); logic threshold 1.3V min; floating prohibited - tie to VIN or MCU GPIO for controlled sequencing. |
| 5 | VIN | Shared 1.7–5.25V input; requires ≥0.47µF ceramic capacitor between VIN and GND, placed within 2mm of pin to suppress supply glitches. |
| 6 | EN1 | Active-high enable for Channel 1 (3.0V); independent control allows staggered power-up of RF and baseband subsystems. |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent enable inputs | EN1 and EN2 allow asynchronous start-up/shutdown of 3.0V and 1.8V rails - essential for power sequencing in multi-rail SoC designs. |
| Built-in auto-discharge | 50Ω on-chip N-channel FET per output rapidly discharges VOUT when disabled, preventing hold-up voltage that could delay system reset. |
| Low-noise, high-PSRR regulation | 60µVrms noise + 75dB PSRR at 1kHz enables clean supply for RF transceivers and high-speed serial interfaces without additional filtering. |
| Wide input range & low IQ | 1.7–5.25V operation with 35µA quiescent current supports direct connection to Li-ion, USB, or buck converter outputs in space-constrained wearables. |
| Thermally optimized DFN package | X2-DFN1212-6's 1.2×1.2mm footprint and exposed thermal pad reduce board area by >50% vs. SOT-23-6 while enabling 600mW power dissipation. |
Applications
| Fingerprint Modules | Smartphone Camera Systems |
|---|---|
|
Use Scenario: Powering capacitive fingerprint sensor ASIC and its analog front-end under battery-limited conditions. IC Role / Device Role / Timing Role: Dual LDO supplying 3.0V for sensor bias and 1.8V for digital interface logic with independent enable sequencing. Use Value: 35µA quiescent current extends standby time; ±1% accuracy ensures consistent sensor sensitivity; low noise prevents false touch detection. |
Use Scenario: Providing clean, sequenced power to image sensor (1.8V) and ISP core (3.0V) in mobile camera modules. IC Role / Device Role / Timing Role: Dual-output LDO with independent EN pins enabling precise power-up order to avoid latch-up or initialization failure. Use Value: 60µVrms output noise preserves image SNR; 75dB PSRR rejects noise from nearby RF power amplifiers and display drivers. |
| RF Front-End Supplies | Portable Media Players |
|
Use Scenario: Delivering stable 3.0V and 1.8V to RF transceiver ICs (e.g., Bluetooth/Wi-Fi SoCs) in compact wireless adapters. IC Role / Device Role / Timing Role: Low-dropout regulator handling dynamic load steps up to 130mA while maintaining <30mV load regulation error. Use Value: 0.22V dropout at 3.0V/120mA allows operation from single-cell Li-ion down to 3.22V; fast load transient response prevents RF desense. |
Use Scenario: Powering audio codec (1.8V), NAND flash interface (3.0V), and display driver in battery-powered media players. IC Role / Device Role / Timing Role: Dual fixed-output LDO replacing discrete regulators to reduce BOM count and PCB area in ultra-thin form factors. Use Value: X2-DFN1212-6 package saves >0.8mm² vs. SOT-23; RoHS/halogen-free construction meets global environmental compliance requirements. |
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-3018FS6-7 | Successor device; identical pinout, same 3.0V/1.8V outputs, improved 130mA guaranteed current limit (vs. 157mA ±25mA), lower 25µA IQ. | Recommended for new designs; supports tighter current tolerance and longer battery life in always-on sensor nodes. | Select AP7345D if designing for production beyond Q3 2024; AP7346 remains viable for legacy design refresh or cost-sensitive replacements. |
| MCP1826S-3002E/DB | Microchip dual LDO; 3.0V/1.8V outputs, but only 100mA per channel, no auto-discharge, larger SOT-23-6 package, higher 90µA IQ. | Suitable for non-critical, low-transient applications where board space and noise are less constrained. | Choose only if AP7346D-3018FS6-7 is unavailable and thermal/noise specs are relaxed; verify EN logic compatibility (active-low vs. active-high). |
Compared with AP7345D-3018FS6-7, this part offers broader current limit tolerance and slightly higher IQ but retains identical pinout and layout - making it suitable for drop-in replacement in existing AP7346 designs; versus MCP1826S, it delivers superior noise, PSRR, and thermal performance in half the footprint.
Availability
AP7346D-3018FS6-7 is available at Aetrix Electronics and suitable for fingerprint modules, smartphone camera systems, and RF front-end supplies requiring stable component supply with full traceability and long-term continuity support.
Supply support for AP7346D-3018FS6-7 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-performance power management, signal integrity, and protection solutions for consumer, industrial, and automotive markets.
The AP7346 belongs to Diodes' high-accuracy dual-LDO product line, engineered specifically for space-constrained portable electronics requiring independent, low-noise, and sequenced dual-rail power delivery.
FAQ
Is AP7346D-3018FS6-7 pin-compatible with AP7345D-3018FS6-7?
Yes - both use identical X2-DFN1212-6 packaging and share identical pin assignments (VOUT1, VOUT2, GND, EN2, VIN, EN1). The AP7345D is a direct functional upgrade with tighter current limit specification and lower quiescent current, requiring no PCB redesign.
What is the role of the thermal pad on the AP7346D-3018FS6-7 package?
The exposed thermal pad is not an electrical terminal but a mechanical thermal path. It must be soldered to a large copper area connected to GND for optimal heat dissipation; using it solely as a GND electrode is discouraged per datasheet guidance due to potential thermal-electrical coupling effects.
Can EN1 and EN2 be tied together for simultaneous enable?
Yes - EN1 and EN2 may be connected to a common control signal, provided the driving source meets the 1.3V minimum high-level threshold and can sink/source ≤1.0µA leakage. However, independent control is recommended for power sequencing in multi-rail systems to prevent backfeed or initialization conflicts.
Does AP7346D-3018FS6-7 require external capacitors, and what values are validated?
Yes - a minimum 0.47µF ceramic capacitor is required on both VIN–GND and each VOUT–GND node. The datasheet validates stability with 0.47µF X7R ceramics (≤100mΩ ESR) placed within 2mm of respective pins; larger bulk capacitors may be added for high-dV/dt loads but are not required for basic operation.
AP7346D-3018FS6-7 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, 3V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.39V @ 120mA, 0.29V @ 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-3018FS6-7 FAQ
1.How can I place an order for AP7346D-3018FS6-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP7346D-3018FS6-7 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-3018FS6-7 reliable?
The price and inventory of AP7346D-3018FS6-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP7346D-3018FS6-7 is usually 5 days.
3.What payment methods are accepted for AP7346D-3018FS6-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP7346D-3018FS6-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP7346D-3018FS6-7?
AP7346D-3018FS6-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP7346D-3018FS6-7 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-3018FS6-7?
For technical support, including AP7346D-3018FS6-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP7346D-3018FS6-7 requirements.
6.How does Aetrix verify that AP7346D-3018FS6-7 is sourced from the original manufacturer or authorized distributors?
All AP7346D-3018FS6-7 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-3018FS6-7 meets industry standards.
7.What is the process for return or replacement of AP7346D-3018FS6-7?
All AP7346D-3018FS6-7 units undergo pre-shipment inspection (PSI). If there is an issue with AP7346D-3018FS6-7, 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-3018FS6-7 part is unused and in its original packaging.
Return procedure for AP7346D-3018FS6-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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