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Diodes Incorporated AP7344D-3333RH4-7
- Part No.:
- AP7344D-3333RH4-7
- Manufacturer:
- Diodes Incorporated
- Package:
- 8-XFDFN Exposed Pad
- Datasheet:
-
AP7344D-3333RH4-7.pdf
- Description:
- IC REG LIN 3.3V/3.3V X2DFN1612-8
- Quantity:
- Payment:
- Shipping:
Inventory:4,687
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Product details
Overview
AP7344D-3333RH4-7 from Diodes Incorporated is a dual-channel, 300mA low-dropout linear regulator with fixed 3.3V outputs per channel, high PSRR (75dB at 1kHz), ultra-low output noise (60µVrms, 10Hz–100kHz), and ±1% output voltage accuracy over temperature. It operates from 1.7V to 5.25V input and features independent enable inputs (EN1/EN2) for power sequencing in space-constrained portable electronics.
For engineers reviewing the AP7344D-3333RH4-7 datasheet, AP7344D-3333RH4-7 pinout, AP7344D-3333RH4-7 application, or AP7344D-3333RH4-7 equivalent, key selection criteria include dual-rail low-noise biasing, thermal performance in X2-DFN1612-8, dropout voltage ≤290mV at 300mA (for 3.3V output), and built-in discharge functionality for rapid VOUT discharge during shutdown.
Technical Context
The AP7344D-3333RH4-7 integrates two independent CMOS-based LDO regulators sharing a common ground but with separate VIN, VOUT, and EN pins. Each channel uses an internal voltage reference, error amplifier, current-limit circuit, and low-RDS(ON) pass transistor - enabling fast line/load transient response and stable operation with 1µF ceramic output capacitors.
It supports active discharge via integrated N-channel MOSFETs (50Ω typical on-resistance when disabled), ensuring controlled VOUT ramp-down. The device is specified for −40°C to +85°C ambient operation, with guaranteed 300mA output per channel and <1.0µA standby current when both enables are low.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 3.3V per channel (VOUT1 = VOUT2 = 3.3V); eliminates external feedback resistors and reduces BOM count. |
| Output Current | 300mA per channel; sufficient to power dual-core PMIC rails or RF transceiver + baseband ICs simultaneously. |
| PSRR | 75dB at 1kHz; suppresses switching noise from adjacent DC-DC converters feeding shared input rails. |
| Output Noise | 60µVrms (10Hz–100kHz); meets stringent analog/RF supply requirements for ADCs, PLLs, and camera ISPs. |
| Dropout Voltage | 220mV (typ) / 290mV (max) at 300mA; enables operation from single-cell Li-ion (3.0V min) while maintaining regulation. |
| Quiescent Current | 100–140µA (both channels enabled, no load); extends battery life in always-on sensor or BLE subsystems. |
| Enable Thresholds | VEN(HI) ≥1.3V, VEN(LO) ≤0.5V; compatible with 1.8V/3.3V GPIO without level-shifting. |
Pinout & Package
X2-DFN1612-8 package: 1.6mm × 1.2mm, 0.4mm pitch, thermally enhanced with exposed thermal pad (not electrically connected to GND by default; recommended to tie to PCB ground plane for optimal thermal dissipation).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND (Pins 1, 4) | Power ground reference | Dual ground pins reduce ground loop impedance and improve PSRR; must be connected to low-impedance PCB ground plane. |
| VOUT1 (Pin 2) | Channel 1 regulated output | 3.3V fixed output; requires local 1µF ceramic capacitor placed within 2mm of pin for stability and transient response. |
| VOUT2 (Pin 3) | Channel 2 regulated output | Independent 3.3V rail; enables split-power domains (e.g., I/O + core logic) with individual enable control. |
| EN2 (Pin 5) | Channel 2 enable input | Active-high logic; drives channel 2 into shutdown (<1µA IQ) when pulled low; must not float. |
| VIN2 (Pin 6) | Channel 2 input supply | Accepts 1.7–5.25V; can be tied to same source as VIN1 or isolated for noise segregation. |
| VIN1 (Pin 7) | Channel 1 input supply | Independent input path allows differential input filtering or dedicated low-noise source routing. |
| EN1 (Pin 8) | Channel 1 enable input | Enables/disables channel 1 independently; supports staggered power-up sequences in multi-rail systems. |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent LDOs | Two fully decoupled 300mA regulators in one 1.6mm × 1.2mm footprint - saves >40% board area vs. discrete solutions. |
| Active discharge | Integrated 50Ω N-MOSFET per channel discharges VOUT to GND within microseconds upon EN deactivation - prevents back-powering or latch-up. |
| High PSRR & low noise | 75dB rejection at 1kHz + 60µVrms noise enables clean power for RF front-ends and precision analog circuits without additional filtering. |
| Ultra-low quiescent current | 100µA typical with both channels active - critical for battery-backed real-time clocks or always-on wake-up controllers. |
| Wide input range | 1.7V to 5.25V operation supports single-cell Li-ion, USB VBUS, and multi-cell alkaline supplies without intermediate conversion. |
Applications
| Smartphone Baseband + RF Power Management | Portable Camera Module Biasing |
|---|---|
|
Use Scenario: Simultaneous powering of application processor I/O domain (3.3V) and RF transceiver (3.3V) in compact smartphone PCBs. IC Role / Device Role / Timing Role: Dual-rail LDO providing isolated, low-noise, sequenced 3.3V supplies with independent enable control for power-state coordination. Use Value: Eliminates need for two discrete LDOs and associated passives; 75dB PSRR prevents GSM/UMTS switching noise from corrupting RF receive sensitivity. |
Use Scenario: Supplying image signal processor (ISP) core and CIS analog front-end in mobile camera modules. IC Role / Device Role / Timing Role: Delivers tightly regulated 3.3V to digital ISP logic and separate 3.3V to CIS analog circuitry with fast transient response. Use Value: 60µVrms noise ensures minimal fixed-pattern noise in raw image data; active discharge prevents residual charge from causing image artifacts during mode transitions. |
| Wireless Audio Earbud Charging Case MCU + Sensor Rail | IoT Edge Node Dual-Sensor Interface |
|
Use Scenario: Powering MCU (3.3V) and Hall-effect charging-detection sensor (3.3V) in space-limited earbud charging case PCBs. IC Role / Device Role / Timing Role: Provides two independent, enable-controllable 3.3V rails - one always-on for sensor wake-up, one gated for MCU during sleep. Use Value: 1µA standby current (both EN low) extends shelf-life battery life; 220mV dropout enables full regulation down to 3.0V battery voltage. |
Use Scenario: Supplying 3.3V to BLE SoC and environmental sensor (e.g., humidity/temperature) in coin-cell-powered IoT nodes. IC Role / Device Role / Timing Role: Dual LDO delivers matched 3.3V rails with precise tracking (±1% accuracy) and synchronized shutdown via shared EN control. Use Value: Output voltage accuracy ensures consistent ADC reference and sensor calibration across temperature; small DFN footprint fits sub-100mm² designs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-LDO applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AP7345D-3333RH4-7 | Successor part with improved PSRR (80dB @1kHz), lower dropout (200mV typ), and AEC-Q200 qualification option. | Targeted for automotive infotainment and ADAS modules requiring extended temperature support and higher reliability. | Select for new designs requiring longer product lifecycle, automotive qualification, or tighter noise margin. |
| TPL7407LDR | Single-channel 500mA LDO with integrated 7-channel high-side driver; no dual-output capability or discharge function. | Used in LED driver and relay control applications - not suitable for dual-rail low-noise biasing. | Only consider if system requires integrated driver functionality and can accept single-rail architecture with external sequencing. |
Compared with AP7344D-3333RH4-7, the AP7345D offers measurable PSRR and thermal performance gains for next-gen portable designs, while the TPL7407LDR serves fundamentally different system roles - making it unsuitable as a functional replacement despite overlapping current rating.
Availability
AP7344D-3333RH4-7 is available at Aetrix Electronics and suitable for smartphone baseband power management, portable camera module biasing, and wireless audio charging case MCU/sensor supply requiring stable component supply and long-term obsolescence planning.
Supply support for AP7344D-3333RH4-7 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 automotive markets.
The AP7344 series belongs to Diodes' high-performance LDO portfolio, designed specifically for battery-powered portable electronics demanding ultra-low noise, high PSRR, and minimal footprint in dual-rail configurations.
FAQ
What is the thermal pad connection requirement for AP7344D-3333RH4-7?
The exposed thermal pad on the X2-DFN1612-8 package must be connected to a large copper pour on the PCB, preferably tied to the GND net for optimal heat dissipation. It is not electrically functional as a GND terminal by itself but improves thermal resistance by up to 40°C/W when properly soldered and grounded. Do not leave it floating or use it as sole GND connection.
Does AP7344D-3333RH4-7 support independent input supplies for each channel?
Yes - VIN1 (Pin 7) and VIN2 (Pin 6) are electrically isolated inputs, allowing separate power sources (e.g., one from a DC-DC converter, another from a battery rail) to feed each LDO channel. This enables noise isolation between domains and flexible power architecture design without cross-coupling.
What is the minimum output capacitance required for stability?
The AP7344D-3333RH4-7 is stable with a minimum 1.0µF X5R/X7R ceramic capacitor placed within 2mm of each VOUT pin and its adjacent GND pin. Larger values (e.g., 4.7µF) improve load transient response but are not required for basic stability. ESR must remain below 100mΩ across 10Hz–1MHz.
Is AP7344D-3333RH4-7 recommended for new designs?
No - Diodes Incorporated explicitly states "THE AP7344 IS NOT RECOMMENDED FOR NEW DESIGNS. PLEASE USE THE AP7345D." While AP7344D-3333RH4-7 remains available for legacy support and existing production, new designs should migrate to AP7345D for improved specs, extended qualification options, and longer-term supply assurance.
AP7344D-3333RH4-7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- 8-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 @ 300mA, 0.29V @ 300mA
- Current - Output:
- 300mA, 300mA
- Current - Quiescent (Iq):
- 140 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-DFN1612-8
AP7344D-3333RH4-7 FAQ
1.How can I place an order for AP7344D-3333RH4-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP7344D-3333RH4-7 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 AP7344D-3333RH4-7 reliable?
The price and inventory of AP7344D-3333RH4-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP7344D-3333RH4-7 is usually 5 days.
3.What payment methods are accepted for AP7344D-3333RH4-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP7344D-3333RH4-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP7344D-3333RH4-7?
AP7344D-3333RH4-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP7344D-3333RH4-7 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 AP7344D-3333RH4-7?
For technical support, including AP7344D-3333RH4-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP7344D-3333RH4-7 requirements.
6.How does Aetrix verify that AP7344D-3333RH4-7 is sourced from the original manufacturer or authorized distributors?
All AP7344D-3333RH4-7 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 AP7344D-3333RH4-7 meets industry standards.
7.What is the process for return or replacement of AP7344D-3333RH4-7?
All AP7344D-3333RH4-7 units undergo pre-shipment inspection (PSI). If there is an issue with AP7344D-3333RH4-7, 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 AP7344D-3333RH4-7 part is unused and in its original packaging.
Return procedure for AP7344D-3333RH4-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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