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Diodes Incorporated AP7346D-3333FS6-7
- Part No.:
- AP7346D-3333FS6-7
- Manufacturer:
- Diodes Incorporated
- Package:
- 6-XFDFN Exposed Pad
- Datasheet:
-
AP7346D-3333FS6-7.pdf
- Description:
- IC REG LIN 3.3V/3.3V X2DFN1212-6
- Quantity:
- Payment:
- Shipping:
Inventory:9,701
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Product details
Overview
AP7346D-3333FS6-7 from Diodes Incorporated is a dual-channel, fixed-output 3.3V low-dropout linear regulator with independent enable control per channel, ±1% output voltage accuracy, 75dB PSRR at 1kHz, and 60µVrms output noise (10Hz–100kHz). It delivers up to 130mA per channel with 35µA quiescent current in single-channel active mode and operates from 1.7V to 5.25V input. It is used in RF supply rails for dual-band wireless modules where tight voltage regulation and low noise are critical.
For engineers reviewing the AP7346D-3333FS6-7 datasheet, AP7346D-3333FS6-7 pinout, AP7346D-3333FS6-7 application, or AP7346D-3333FS6-7 equivalent, key selection criteria include dual independent enable logic, matched 3.3V outputs, X2-DFN1212-6 footprint constraints, thermal PAD handling, and current-limit accuracy (157mA ±25mA) for fault-tolerant portable power domains.
Technical Context
The AP7346D-3333FS6-7 integrates two independent CMOS-based LDO regulators sharing one VIN and GND, each with dedicated EN1/EN2 inputs, internal voltage reference, error amplifier, and fold-back current limit circuitry. Its architecture supports simultaneous or staggered channel activation without cross-regulation.
It features built-in auto-discharge via integrated 50Ω N-channel MOSFETs per output, enabling rapid VOUT discharge when disabled. The device maintains stability with ≥0.47µF ceramic output capacitors and requires no external compensation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 3.3V per channel - eliminates external resistor network; ensures rail-to-rail compatibility with 3.3V logic and RF ICs. |
| Output Accuracy | ±1% at +25°C - guarantees consistent biasing for sensitive analog/RF circuits without calibration overhead. |
| PSRR | 75dB at 1kHz - suppresses switching noise from upstream DC/DC converters feeding the LDO input. |
| Output Noise | 60µVrms (10Hz–100kHz) - enables clean power for low-phase-noise VCOs and ADC reference supplies. |
| Quiescent Current | 35µA (single channel active) - extends battery life in always-on sensor or standby RF subsystems. |
| Current Limit | 157mA ±25mA - provides predictable short-circuit protection while allowing margin for transient load peaks. |
| Dropout Voltage | 220mV at 130mA (VOUT = 3.3V) - supports operation down to 3.52V input, compatible with single-cell Li-ion under discharge. |
Pinout & Package
AP7346D-3333FS6-7 uses the X2-DFN1212-6 package: 1.2mm × 1.2mm, 0.4mm height, 0.4mm pitch, with exposed thermal pad (non-functional as GND electrode). PCB layout requires large copper area under the thermal pad connected to GND for thermal dissipation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - VOUT1 | Channel 1 regulated output | Supplies first 3.3V domain; must be decoupled with ≥0.47µF ceramic capacitor placed adjacent to pin. |
| 2 - VOUT2 | Channel 2 regulated output | Supplies second independent 3.3V domain (e.g., separate RF chain); shares no internal coupling with VOUT1. |
| 3 - GND | Power ground reference | Common return path for both channels; requires low-impedance connection to PCB ground plane. |
| 4 - EN2 | Channel 2 enable input | Active-high logic: >1.3V enables VOUT2; <0.5V disables it and activates auto-discharge; must not float. |
| 5 - VIN | Input power supply | Accepts 1.7V–5.25V; requires ≥0.47µF ceramic decoupling capacitor placed within 2mm of this pin. |
| 6 - EN1 | Channel 1 enable input | Active-high logic: >1.3V enables VOUT1; <0.5V disables it and activates auto-discharge; must not float. |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent enable control | EN1 and EN2 allow sequenced or isolated power-up/down of two 3.3V rails-critical for RF transceiver TX/RX isolation. |
| Built-in auto-discharge | 50Ω on-chip N-MOSFET per output discharges VOUT to <0.1V within 100µs after disable-prevents back-powering of downstream circuitry. |
| Low-noise, high-PSRR regulation | 60µVrms noise + 75dB PSRR enables direct powering of RF front-end ICs without additional filtering stages. |
| High-accuracy current limit | 157mA ±25mA fold-back limit ensures repeatable fault response across temperature and process variation-supports robust BOM design. |
| Ultra-small X2-DFN1212-6 footprint | 1.2mm × 1.2mm body with 0.4mm pitch allows dense integration in space-constrained mobile modules (e.g., fingerprint sensors). |
Applications
| Fingerprint Sensor Module | Wi-Fi/Bluetooth Dual-Band Transceiver |
|---|---|
|
Use Scenario: Powering image sensor and MCU core in compact biometric authentication modules. IC Role / Device Role: Dual-rail LDO delivering matched 3.3V supplies-one for analog sensor bias, one for digital interface logic. Use Value: ±1% accuracy ensures consistent ADC reference and timing margins; low 35µA quiescent current extends standby battery life beyond 6 months. |
Use Scenario: Supplying separate 3.3V rails to 2.4GHz and 5GHz RF sections in combo wireless SoCs. IC Role / Device Role: Isolated dual LDO preventing noise coupling between TX chains during concurrent operation. Use Value: 75dB PSRR rejects switching noise from shared PMIC; independent EN pins enable dynamic RF section power gating. |
| Smartphone Camera ISP Core | Portable Media Player Audio Codec |
|
Use Scenario: Providing clean 3.3V bias to image signal processor and CIS interface in multi-camera systems. IC Role / Device Role: Low-noise dual LDO with fast load transient response (<100µs recovery) for burst-mode imaging. Use Value: 60µVrms noise prevents fixed-pattern noise in RAW image data; 130mA per channel supports high-speed MIPI CSI-2 links. |
Use Scenario: Powering stereo audio DAC and headphone amplifier in battery-powered media players. IC Role / Device Role: Dual LDO supplying 3.3V to DAC core and output driver stage with independent sequencing. Use Value: Auto-discharge eliminates pop/click during playback start/stop; ±1% accuracy maintains THD+N spec across battery voltage range. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-LDO applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AP7345D-3333FS6-7 | Successor part with identical pinout, same 3.3V/3.3V outputs, but improved 130mA guaranteed current limit (vs. 157mA ±25mA) and tighter ±0.8% accuracy. | Recommended for new designs; supports same X2-DFN1212-6 layout but offers enhanced production yield and long-term availability. | Select AP7345D if designing in now-Diodes explicitly states AP7346 is not recommended for new designs. |
| TPL7407LDR | Single-channel 3.3V LDO (not dual), 250mA rating, no auto-discharge, 65dB PSRR, larger SOT-23-5 package. | Requires two devices for dual-rail use; lacks independent enable and discharge-unsuitable for space-constrained or fast-sequencing applications. | Only viable if board area permits duplication and auto-discharge is unnecessary; no pin or functional compatibility. |
Compared with AP7346D-3333FS6-7, the AP7345D offers higher production reliability and tighter specs in the same footprint, while the TPL7407LDR fails to replicate dual-channel independence, discharge capability, or size-making it a non-substitutable alternative.
Availability
AP7346D-3333FS6-7 is available at Aetrix Electronics and suitable for fingerprint sensor modules, Wi-Fi/Bluetooth transceivers, and smartphone camera ISPs requiring stable component supply, consistent parametric performance, and long-lifecycle support in portable electronics.
Supply support for AP7346D-3333FS6-7 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, designed specifically for space-constrained portable electronics requiring independent, low-noise, and fast-transient power rails with minimal external components.
FAQ
What is the thermal pad connection requirement for AP7346D-3333FS6-7?
The exposed thermal pad on the X2-DFN1212-6 package must be connected to a large copper pour tied to GND for effective heat dissipation-but it must not serve as the sole GND electrode. Layout guidelines specify using ≥4 vias (0.3mm diameter) from the pad to an internal GND plane, with the pad itself left unmasked for solder reflow adhesion.
Can AP7346D-3333FS6-7 operate with only one channel enabled?
Yes-EN1 and EN2 are fully independent. Driving EN1 high and EN2 low enables only VOUT1 (3.3V), drawing 35µA quiescent current; EN2 remains in shutdown with <1.0µA standby leakage. This configuration is validated in the datasheet's electrical characteristics table under "Quiescent Current" test conditions.
Is the 3.3V output voltage trimmed at wafer or package level?
The ±1% output accuracy is achieved via post-package voltage trimming during final test, as confirmed by Diodes' production documentation for the AP7346 family. This ensures stability over temperature (-40°C to +85°C) and lifetime, unlike untrimmed bandgap-based LDOs that drift with aging.
Does AP7346D-3333FS6-7 support reverse current blocking?
No-the AP7346D-3333FS6-7 does not integrate reverse current blocking. When VOUT exceeds VIN (e.g., during hot-swap or backup battery scenarios), current can flow backward from VOUT to VIN through the pass transistor's intrinsic body diode. External reverse-blocking MOSFETs are required for such use cases.
AP7346D-3333FS6-7 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):
- 3.3V, 3.3V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.29V @ 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-3333FS6-7 FAQ
1.How can I place an order for AP7346D-3333FS6-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP7346D-3333FS6-7 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-3333FS6-7 reliable?
The price and inventory of AP7346D-3333FS6-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP7346D-3333FS6-7 is usually 5 days.
3.What payment methods are accepted for AP7346D-3333FS6-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP7346D-3333FS6-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP7346D-3333FS6-7?
AP7346D-3333FS6-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP7346D-3333FS6-7 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-3333FS6-7?
For technical support, including AP7346D-3333FS6-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP7346D-3333FS6-7 requirements.
6.How does Aetrix verify that AP7346D-3333FS6-7 is sourced from the original manufacturer or authorized distributors?
All AP7346D-3333FS6-7 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-3333FS6-7 meets industry standards.
7.What is the process for return or replacement of AP7346D-3333FS6-7?
All AP7346D-3333FS6-7 units undergo pre-shipment inspection (PSI). If there is an issue with AP7346D-3333FS6-7, 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-3333FS6-7 part is unused and in its original packaging.
Return procedure for AP7346D-3333FS6-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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