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Diodes Incorporated AP7346D-3328FS6-7
- Part No.:
- AP7346D-3328FS6-7
- Manufacturer:
- Diodes Incorporated
- Package:
- 6-XFDFN Exposed Pad
- Datasheet:
-
AP7346D-3328FS6-7.pdf
- Description:
- IC REG LIN 2.8V/3.3V X2DFN1212-6
- Quantity:
- Payment:
- Shipping:
Inventory:9,990
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Product details
Overview
AP7346D-3328FS6-7 from Diodes Incorporated is a dual-channel, high-accuracy current-limiting LDO regulator in X2-DFN1212-6 package, delivering fixed 3.3V 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 (single-channel active), and integrated auto-discharge for rapid output voltage decay. Designed for RF supply rails and portable media subsystems where tight regulation and low noise are critical.
For engineers reviewing the AP7346D-3328FS6-7 datasheet, AP7346D-3328FS6-7 pinout, AP7346D-3328FS6-7 application, or AP7346D-3328FS6-7 equivalent, key selection considerations include dual-output voltage matching (3.3V/2.8V), 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-3328FS6-7 integrates two independent CMOS-based LDO regulators sharing a single VIN input but with separate EN1/EN2 controls and VOUT1/VOUT2 outputs. Each channel employs a precision voltage reference, error amplifier, and current-limit circuit with fold-back protection (55mA short-circuit clamp) and built-in N-channel discharge transistors (50Ω typical RON).
It operates across 1.7V–5.25V input range with dropout as low as 0.22V at 3.0V < VOUT ≤ 3.6V (120mA load), supports 0–130mA per channel, and maintains ±1.5% output accuracy over −40°C to +85°C ambient. The device achieves 0.02%/V line regulation and ≤30mV load regulation (1mA–120mA), enabling stable operation under dynamic load transients in battery-powered systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltages | Fixed 3.3V (Channel 1) and 2.8V (Channel 2); eliminates external feedback resistors and ensures consistent rail generation. |
| Output Accuracy | ±1% at +25°C, ±1.5% over −40°C to +85°C; enables reliable logic-level compatibility for 3.3V/2.8V I/O domains. |
| PSRR | 75dB at 1kHz; suppresses switching noise from upstream DC-DC converters feeding RF or analog circuits. |
| Output Noise | 60µVrms (10Hz–100kHz); minimizes phase noise impact on RF synthesizers and ADC reference supplies. |
| Quiescent Current | 35µA (one channel active, no load); extends battery life in always-on sensor or standby subsystems. |
| Current Limit | 157mA ±25mA per channel; provides predictable overcurrent protection without external sensing components. |
| Dropout Voltage | 0.22V max at 3.3V output / 120mA load; allows operation from single-cell Li-ion (3.0V min) with margin. |
| Enable Thresholds | EN high ≥1.3V, EN low ≤0.5V; compatible with 1.8V/3.3V GPIO without level-shifting. |
Pinout & Package
X2-DFN1212-6 package: 1.2mm × 1.2mm footprint, 0.4mm pitch, exposed thermal pad (non-functional GND connection recommended for thermal dissipation).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VOUT1 | 3.3V regulated output; requires local 0.47µF ceramic capacitor for stability and transient response. |
| 2 | VOUT2 | 2.8V regulated output; independently controllable and decoupled from VOUT1. |
| 3 | GND | Common ground reference for both regulators; must connect to low-impedance PCB ground plane. |
| 4 | EN2 | Active-high enable for Channel 2; floating state prohibited-tie to VIN or GND for default ON/OFF. |
| 5 | VIN | Shared 1.7V–5.25V input; requires 0.47µF ceramic capacitor placed adjacent to pin for input decoupling. |
| 6 | EN1 | Active-high enable for Channel 1; enables independent power sequencing of 3.3V and 2.8V rails. |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent enable inputs | EN1 and EN2 allow staggered startup/shutdown of 3.3V and 2.8V supplies to meet ASIC or PMIC sequencing requirements. |
| Integrated auto-discharge | 50Ω N-channel discharge path per channel pulls VOUT to GND within microseconds after EN deactivation-critical for fast power-down in mobile SoC subsystems. |
| High PSRR + low noise | 75dB rejection at 1kHz and 60µVrms broadband noise ensure clean biasing for RF front-ends and high-resolution ADCs. |
| Ultra-low quiescent current | 35µA (single channel active) and 0.1µA standby (both EN low) extend runtime in battery-backed real-time clocks and sensors. |
| Accurate current limiting | 157mA ±25mA per channel provides repeatable fault protection without calibration-reduces BOM count vs. discrete current-sense solutions. |
| Small-footprint DFN package | X2-DFN1212-6 (1.2mm × 1.2mm) enables dense layout in space-constrained modules like fingerprint sensors and camera ISPs. |
Applications
| Fingerprint Modules | Smartphone RF Subsystems |
|---|---|
|
Use Scenario: Powering capacitive fingerprint sensor ICs requiring tightly regulated 3.3V analog supply and 2.8V I/O interface voltage. IC Role / Device Role / Timing Role: Dual-LDO providing sequenced, low-noise bias rails with fast discharge to meet biometric security reset timing. Use Value: Eliminates need for discrete regulators and discharge FETs-reducing solution size by >40% and improving ESD robustness via integrated protection. |
Use Scenario: Supplying RF transceiver ICs (e.g., LTE/Wi-Fi front-end modules) with isolated 3.3V PA bias and 2.8V LNA/VCO supplies. IC Role / Device Role / Timing Role: Low-noise, high-PSRR dual LDO rejecting switching noise from system PMIC while supporting independent enable for transmit/receive mode control. Use Value: Achieves >25dB improvement in RX sensitivity vs. single-rail LDO due to channel isolation and 60µVrms noise floor. |
| Portable Media Players | Camera Image Signal Processors |
|
Use Scenario: Delivering clean 3.3V core voltage and 2.8V I/O voltage to audio CODECs and DACs in battery-powered media players. IC Role / Device Role / Timing Role: Dual-output LDO with ultra-low quiescent current enabling >100-hour playback on single-cell Li-ion while maintaining THD+N < 0.005%. Use Value: Reduces total system quiescent power by 65% compared to discrete LDOs-directly extending battery life without sacrificing audio fidelity. |
Use Scenario: Powering high-speed image signal processors requiring 3.3V digital core and 2.8V analog/PLL supplies with strict noise and sequencing requirements. IC Role / Device Role / Timing Role: Dual-channel LDO with independent EN pins enabling precise power-up order (analog before digital) and fast discharge to prevent latch-up during mode transitions. Use Value: Enables sub-10ms ISP wake-up time and eliminates image artifacts caused by supply coupling-verified in 12MP+ mobile camera validation. |
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-3328FS6-7 | Successor part with identical pinout, same 3.3V/2.8V outputs, improved current limit accuracy (±15mA vs. ±25mA), and lower 25µA quiescent current. | Recommended for new designs; supports same footprint and BOM but offers tighter regulation and longer battery life. | Select when designing new products-Diodes explicitly states AP7346 is not recommended for new designs. |
| Torex XC6216D332MR-G | Single-channel 3.3V LDO only; no 2.8V output or dual-enable capability; higher 60µVrms noise and no discharge function. | Suitable only if 2.8V rail is generated elsewhere; lacks sequencing and fast discharge needed for fingerprint/camera use cases. | Use only as partial replacement where second channel is omitted and discharge is unnecessary. |
Compared with AP7346D-3328FS6-7, the AP7345D-3328FS6-7 delivers measurable improvements in quiescent current and current-limit tolerance without layout changes, while the XC6216D332MR-G requires redesign to accommodate missing 2.8V regulation and disable sequencing-making it viable only for simplified subsystems.
Availability
AP7346D-3328FS6-7 is available at Aetrix Electronics and suitable for fingerprint modules, smartphone RF subsystems, and portable media players requiring stable component supply with guaranteed long-term availability for industrial and consumer OEM programs.
Supply support for AP7346D-3328FS6-7 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 semiconductor company specializing in discrete, analog, and mixed-signal devices for power management, signal integrity, and connectivity applications.
The AP7346 belongs to Diodes' high-accuracy dual-LDO product line, engineered specifically for space-constrained portable electronics requiring independent, low-noise, and sequenced voltage rails with minimal external components.
FAQ
Is AP7346D-3328FS6-7 pin-compatible with AP7345D-3328FS6-7?
Yes-both parts share identical X2-DFN1212-6 packaging, pin assignment, and electrical interface. The AP7345D is a direct drop-in replacement with enhanced specifications including tighter current-limit accuracy (±15mA) and lower quiescent current (25µA vs. 35µA), making migration straightforward for existing designs.
What is the maximum continuous output current per channel?
The AP7346D-3328FS6-7 supports up to 130mA continuous output current per channel under recommended operating conditions (TA ≤ +85°C, sufficient PCB copper area for thermal dissipation). Absolute maximum rating is 130mA; exceeding this risks thermal shutdown or permanent damage due to power dissipation limits (600mW).
Does the thermal pad require solder connection to PCB ground?
The exposed thermal pad is not electrically connected internally-it serves solely for heat conduction. Diodes recommends connecting it to a large copper pour tied to GND for optimal thermal performance, but it must not be used as the sole GND electrode; the dedicated Pin 3 (GND) remains the primary ground reference for regulation stability.
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 or disable both channels simultaneously. However, doing so forfeits independent sequencing capability. If used jointly, ensure the driving source meets the specified thresholds (≥1.3V for ON, ≤0.5V for OFF) and avoids floating states that could cause undefined regulator behavior.
AP7346D-3328FS6-7 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):
- 2.8V, 3.3V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.3V @ 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-3328FS6-7 FAQ
1.How can I place an order for AP7346D-3328FS6-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP7346D-3328FS6-7 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-3328FS6-7 reliable?
The price and inventory of AP7346D-3328FS6-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP7346D-3328FS6-7 is usually 5 days.
3.What payment methods are accepted for AP7346D-3328FS6-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP7346D-3328FS6-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP7346D-3328FS6-7?
AP7346D-3328FS6-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP7346D-3328FS6-7 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-3328FS6-7?
For technical support, including AP7346D-3328FS6-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP7346D-3328FS6-7 requirements.
6.How does Aetrix verify that AP7346D-3328FS6-7 is sourced from the original manufacturer or authorized distributors?
All AP7346D-3328FS6-7 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-3328FS6-7 meets industry standards.
7.What is the process for return or replacement of AP7346D-3328FS6-7?
All AP7346D-3328FS6-7 units undergo pre-shipment inspection (PSI). If there is an issue with AP7346D-3328FS6-7, 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-3328FS6-7 part is unused and in its original packaging.
Return procedure for AP7346D-3328FS6-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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