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Diodes Incorporated AP7346D-1833FS6-7
- Part No.:
- AP7346D-1833FS6-7
- Manufacturer:
- Diodes Incorporated
- Package:
- 6-XFDFN Exposed Pad
- Datasheet:
-
AP7346D-1833FS6-7.pdf
- Description:
- IC REG LIN 1.8V/3.3V X2DFN1212-6
- Quantity:
- Payment:
- Shipping:
Inventory:4,255
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Product details
Overview
AP7346D-1833FS6-7 from Diodes Incorporated is a dual-channel, high-accuracy current-limiting LDO regulator in X2-DFN1212-6 package, delivering fixed 1.8V and 3.3V 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 portable media subsystems.
For engineers reviewing the AP7346D-1833FS6-7 datasheet, AP7346D-1833FS6-7 pinout, AP7346D-1833FS6-7 application, or AP7346D-1833FS6-7 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-enabled transient response in space-constrained handheld designs.
Technical Context
The AP7346D-1833FS6-7 integrates two independent CMOS-based LDO regulators sharing a common VIN and GND, each with dedicated EN pin, precision voltage reference, error amplifier, and fold-back current limit circuitry. Its architecture supports simultaneous or staggered channel activation without cross-regulation coupling.
Each channel delivers fixed output (CH1 = 1.8V, CH2 = 3.3V) via internal resistor networks, with dropout voltages as low as 0.22V (CH2 @ 3.3V/120mA) and load regulation of ≤30mV across 1–120mA. The device includes built-in auto-discharge MOSFETs (50Ω typical on-resistance) activated during shutdown to rapidly discharge output capacitors.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltages | CH1 = 1.8V, CH2 = 3.3V - fixed, non-adjustable; enables dual-rail power for baseband + RF ICs |
| Output Accuracy | ±1% at +25°C - ensures stable logic-level compliance for 1.8V I/O and 3.3V analog/RF circuitry |
| PSRR | 75dB at 1kHz - suppresses switching noise from upstream DC/DC converters feeding shared VIN rail |
| Quiescent Current | 35µA (one channel active) - extends battery life in always-on sensor or standby subsystems |
| Current Limit | 157mA ±25mA per channel - provides predictable short-circuit protection without thermal runaway |
| Output Noise | 60µVrms (10Hz–100kHz) - preserves SNR in sensitive RF receivers and camera image signal processors |
| Enable Thresholds | EN low ≤0.5V, EN high ≥1.3V - 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 - requires external copper pour for thermal dissipation).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VOUT1 | 1.8V regulated output - powers core logic or low-voltage peripherals; requires local 0.47µF ceramic capacitor |
| 2 | VOUT2 | 3.3V regulated output - supplies RF transceivers or analog front-ends; decoupled independently from VOUT1 |
| 3 | GND | Common ground reference - must connect to low-impedance PCB ground plane; not tied to thermal pad |
| 4 | EN2 | Channel 2 enable input - high = 3.3V output active; low = shutdown with auto-discharge enabled |
| 5 | VIN | Input supply (1.7–5.25V) - shared by both regulators; requires 0.47µF ceramic capacitor placed adjacent to pin |
| 6 | EN1 | Channel 1 enable input - high = 1.8V output active; low = shutdown with auto-discharge enabled |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent enable control | EN1 and EN2 allow sequenced power-up/down of 1.8V and 3.3V rails - critical for SoC boot order compliance |
| Integrated auto-discharge | 50Ω NMOS discharge path per channel - reduces VOUT decay time to <100µs, preventing latch-up in downstream logic |
| Ultra-low noise output | 60µVrms broadband noise - avoids interference in RF receiver IF stages and high-resolution ADC references |
| High PSRR at low frequency | 75dB @ 1kHz - rejects ripple from buck converter switching frequencies and their harmonics |
| Wide input range | 1.7V to 5.25V operation - supports single-cell Li-ion (3.0–4.2V), USB 5V, or boosted 3.3V rails |
Applications
| Fingerprint Module Power | Smartphone Baseband Subsystem |
|---|---|
Use Scenario: Powering capacitive fingerprint sensor IC and its analog front-end ASIC in mobile handsets. IC Role / Device Role / Timing Role: Dual-rail LDO supplying clean 1.8V for digital interface and 3.3V for analog sensing bias. Use Value: Low 60µVrms noise prevents false touch detection; independent EN control enables sensor sleep/wake synchronization with host processor. |
Use Scenario: Regulating power to application processor I/O banks and modem RF transceiver in compact smartphone PCBs. IC Role / Device Role / Timing Role: Provides isolated 1.8V (core I/O) and 3.3V (RF PA bias) rails from shared battery or PMIC output. Use Value: 75dB PSRR blocks DC/DC switching noise from corrupting RF transmit spectral purity; 1.2mm × 1.2mm footprint saves board area in antenna-proximate zones. |
| Wireless Camera Sensor Supply | Portable Media Player Audio Codec |
Use Scenario: Powering CMOS image sensor and ISP in battery-powered action cameras. IC Role / Device Role / Timing Role: Delivers low-noise 1.8V for sensor digital interface and 3.3V for analog pixel array biasing. Use Value: ±1% output accuracy maintains consistent sensor gain calibration; auto-discharge prevents ghost images during rapid power cycling. |
Use Scenario: Supplying audio codec and headphone amplifier in portable music players. IC Role / Device Role / Timing Role: Generates quiet 1.8V for digital logic and 3.3V for analog output drivers from single Li-ion cell. Use Value: 35µA quiescent current extends playback time in pause mode; low dropout (0.22V @ 3.3V) sustains operation down to 3.5V battery voltage. |
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-1833FS6-7 | Successor part; identical pinout, same 1.8V/3.3V outputs, improved current limit tolerance (±15mA vs ±25mA), lower 25µA IQ (single-channel) | Recommended for new designs; supports tighter load regulation (±15mV vs ±30mV) and enhanced thermal derating | Select when designing for production longevity and tighter accuracy requirements; drop-in replacement with no layout change |
| Torex XC6216D1833MR-G | 1.8V/3.3V dual LDO in SOT-26; higher 60µA IQ, no auto-discharge, 65dB PSRR @ 1kHz, ±2% VOUT accuracy | Lacks independent EN pins and discharge function; suited for cost-sensitive, non-sequencing applications | Choose only if board space allows SOT-26 and system does not require fast VOUT decay or precise sequencing |
Compared with AP7346D-1833FS6-7, the AP7345D-1833FS6-7 offers superior accuracy and efficiency for new designs, while the XC6216D1833MR-G trades off discharge capability and PSRR for lower cost and wider availability - making the AP7346D-1833FS6-7 optimal for legacy designs requiring guaranteed supply continuity and known transient behavior.
Availability
AP7346D-1833FS6-7 is available at Aetrix Electronics and suitable for fingerprint modules, smartphone baseband subsystems, and wireless camera sensors requiring stable component supply with known thermal and transient performance.
Supply support for AP7346D-1833FS6-7 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 series belongs to Diodes' high-accuracy dual-LDO product line, designed specifically for multi-rail portable electronics where space, noise, and sequencing control are critical - targeting applications with stringent EMI and battery-life constraints.
FAQ
What is the thermal pad connection requirement for AP7346D-1833FS6-7?
The exposed thermal pad on the X2-DFN1212-6 package must be connected to a large copper pour on the PCB for heat dissipation but should not serve as the sole GND connection. It may be left floating electrically or tied to GND through a separate low-impedance path - never used as the primary ground return for VIN or VOUT currents.
Can AP7346D-1833FS6-7 operate with only one channel enabled?
Yes - EN1 and EN2 are fully independent. Driving EN1 high and EN2 low activates only the 1.8V output, drawing 35µA quiescent current; driving EN2 high and EN1 low activates only the 3.3V output with identical IQ. Both channels can be disabled simultaneously for 0.1–1.0µA standby current.
Is AP7346D-1833FS6-7 qualified for automotive use?
No - the AP7346D-1833FS6-7 is specified for industrial temperature range (−40°C to +85°C) and is not AEC-Q100 qualified. Diodes offers automotive-grade variants (e.g., AP7346Q) with PPAP support and IATF 16949 manufacturing, but this specific part number is intended for commercial portable electronics.
How does the auto-discharge function behave during shutdown?
When either EN pin is pulled low, the corresponding channel's output is actively discharged through an internal 50Ω NMOS transistor to GND, reducing VOUT to <100mV within ~50µs (typical) for a 1µF load. This prevents residual voltage from interfering with downstream logic states or causing unintended wake events.
AP7346D-1833FS6-7 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, 3.3V
- 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-1833FS6-7 FAQ
1.How can I place an order for AP7346D-1833FS6-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP7346D-1833FS6-7 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-1833FS6-7 reliable?
The price and inventory of AP7346D-1833FS6-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP7346D-1833FS6-7 is usually 5 days.
3.What payment methods are accepted for AP7346D-1833FS6-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP7346D-1833FS6-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP7346D-1833FS6-7?
AP7346D-1833FS6-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP7346D-1833FS6-7 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-1833FS6-7?
For technical support, including AP7346D-1833FS6-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP7346D-1833FS6-7 requirements.
6.How does Aetrix verify that AP7346D-1833FS6-7 is sourced from the original manufacturer or authorized distributors?
All AP7346D-1833FS6-7 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-1833FS6-7 meets industry standards.
7.What is the process for return or replacement of AP7346D-1833FS6-7?
All AP7346D-1833FS6-7 units undergo pre-shipment inspection (PSI). If there is an issue with AP7346D-1833FS6-7, 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-1833FS6-7 part is unused and in its original packaging.
Return procedure for AP7346D-1833FS6-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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