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Diodes Incorporated AP7344-3328RH4-7
- Part No.:
- AP7344-3328RH4-7
- Manufacturer:
- Diodes Incorporated
- Package:
- 8-XFDFN Exposed Pad
- Datasheet:
-
AP7344-3328RH4-7.pdf
- Description:
- IC REG LIN 2.8V/3.3V X2DFN1612-8
- Quantity:
- Payment:
- Shipping:
Inventory:3,036
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Product details
Overview
AP7344-3328RH4-7 from Diodes Incorporated is a dual-channel CMOS low-dropout regulator delivering fixed 3.3V and 2.8V outputs, each rated for 300mA continuous current, ±1% output voltage accuracy, 75dB PSRR at 1kHz, and 60µVrms output noise (10Hz–100kHz). It operates from 1.7V to 5.25V input and supports independent enable control per channel for power sequencing in compact portable electronics.
For engineers reviewing the AP7344-3328RH4-7 datasheet, AP7344-3328RH4-7 pinout, AP7344-3328RH4-7 application, or AP7344-3328RH4-7 equivalent, key selection criteria include dual-rail low-noise biasing, high PSRR under RF-sensitive loads, thermal performance in X2-DFN1612-8, and compatibility with ceramic output capacitors down to 1.0µF.
Technical Context
The AP7344 integrates two independent LDO regulators on a single CMOS die, each with dedicated error amplifier, voltage reference, current-limit circuit, and enable input. No internal discharge path is present in the RH4 variant-output discharge requires external circuitry.
Each channel features low dropout voltage (e.g., 0.22V typical at 300mA for 3.3V output), ultra-low quiescent current (50µA per active channel), and stable operation with 1.0µF ceramic output capacitors. Line and load transient response is optimized for handheld communication equipment requiring fast regulation recovery.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Channel 1: 3.3V fixed; Channel 2: 2.8V fixed - eliminates external feedback resistors and simplifies layout for dual-rail systems. |
| Max Output Current | 300mA per channel - supports moderate-power RF ICs, camera modules, and baseband processors without thermal derating in typical PCB layouts. |
| Output Accuracy | ±1% at +25°C, ±1.5% over −40°C to +85°C - ensures reliable logic-level compliance for 3.3V/2.8V I/O domains across industrial temperature range. |
| PSRR | 75dB at 1kHz - suppresses switching noise from upstream DC-DC converters feeding sensitive analog/RF circuitry. |
| Output Noise | 60µVrms (10Hz–100kHz) - meets low-noise requirements for ADC references, PLL VCO supplies, and image sensor bias rails. |
| Quiescent Current | 50µA per active channel - enables always-on subsystems (e.g., RTC, wake-up logic) with minimal battery drain in portable devices. |
| Dropout Voltage | 0.22V typical at 300mA for 3.3V output - allows operation from single-cell Li-ion (3.0V min) while maintaining regulation margin. |
Pinout & Package
AP7344-3328RH4-7 is housed in an 8-pin X2-DFN1612-8 package (1.6mm × 1.2mm, 0.4mm pitch) with exposed thermal pad. The compact footprint supports high-density mobile PCB designs and requires direct GND connection of the thermal pad for optimal thermal dissipation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND (Pins 1, 4) | Common ground reference | Dual GND pins reduce ground impedance and improve PSRR; must be connected to low-impedance PCB ground plane. |
| VOUT1 (Pin 2) | Channel 1 regulated output | Delivers fixed 3.3V; requires local 1.0µF ceramic capacitor placed adjacent to pin for stability and transient response. |
| VOUT2 (Pin 3) | Channel 2 regulated output | Delivers fixed 2.8V; decoupled independently to avoid cross-talk between 3.3V and 2.8V domains. |
| EN2 (Pin 5) | Channel 2 enable input | Active-high logic control; must not float - tie to VIN2 or microcontroller GPIO to sequence 2.8V rail after 3.3V stabilization. |
| VIN2 (Pin 6) | Channel 2 input supply | Accepts 1.7V–5.25V; requires 0.47µF ceramic input capacitor near pin to suppress supply glitches during load transients. |
| VIN1 (Pin 7) | Channel 1 input supply | Independent input for 3.3V channel; enables separate power domain routing (e.g., from different DC-DC outputs). |
| EN1 (Pin 8) | Channel 1 enable input | Active-high logic control; supports independent power-up timing for 3.3V rail - critical for boot sequencing in SoC-based systems. |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent LDOs | Two fully isolated regulators on one die - eliminates need for discrete dual-LDO solutions and reduces BOM count by one component. |
| High PSRR (75dB @ 1kHz) | Rejects ripple from noisy switchers - enables clean 2.8V supply for RF transceivers without additional filtering stages. |
| Low-noise 60µVrms output | Meets stringent noise floor requirements for precision analog blocks - avoids dedicated low-noise LDOs in space-constrained designs. |
| Ultra-low quiescent current (50µA) | Extends battery life in standby mode - supports >1-year operation in IoT sensors powered by coin cells when paired with sleep-mode MCUs. |
| Wide input range (1.7V–5.25V) | Operates directly from single Li-ion, USB, or buck converter outputs - eliminates intermediate pre-regulation stages. |
Applications
| Smartphone Baseband Power | RF Front-End Biasing |
|---|---|
|
Use Scenario: Supplying 3.3V I/O and 2.8V RF transceiver core in LTE/5G smartphone applications with tight PCB area constraints. IC Role / Device Role / Timing Role: Dual-rail LDO providing sequenced, low-noise, and PSRR-optimized bias for baseband processor and RFIC. Use Value: Eliminates need for two discrete LDOs while meeting ETSI radiated emission limits via 75dB PSRR suppression of DC-DC switching noise. |
Use Scenario: Powering GaAs pHEMT driver stages and LNA bias networks in Wi-Fi 6/6E front-end modules. IC Role / Device Role / Timing Role: Low-noise 2.8V rail generator with fast load transient response to maintain RF gain stability during packet bursts. Use Value: 60µVrms noise floor prevents reciprocal mixing degradation; 0.22V dropout enables efficient operation from 3.0V battery minimum. |
| Camera Module Core Supply | Portable Media Player Audio Codec |
|
Use Scenario: Delivering clean 2.8V to CIS image sensor analog front-end and 3.3V to digital interface logic in multi-megapixel mobile cameras. IC Role / Device Role / Timing Role: Dual-output LDO ensuring simultaneous, low-noise power delivery with independent enable control for sensor initialization sequence. Use Value: ±1% output accuracy guarantees consistent ADC reference voltage; 1.0µF ceramic compatibility reduces board area vs. tantalum alternatives. |
Use Scenario: Supplying 3.3V to audio DAC and 2.8V to headphone amplifier in Bluetooth-enabled portable media players. IC Role / Device Role / Timing Role: Low-quiescent-current dual LDO enabling >20-hour playback from 500mAh battery while maintaining THD+N < 0.01%. Use Value: 50µA per active channel minimizes idle power loss; 75dB PSRR prevents audible switching artifacts in audio output. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-LDO applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AP7345D-3328RH4-7 | Includes integrated auto-discharge FET per channel; otherwise identical specs and pinout. | Required where rapid VOUT discharge during shutdown is needed (e.g., to meet USB suspend voltage decay requirements). | Select AP7345D if system-level discharge timing mandates <1ms VOUT decay; AP7344 remains optimal for cost-sensitive, non-discharge applications. |
| Torex XC6210B332MR-G | Single-channel 3.3V LDO only; 200mA rating; 45dB PSRR at 1kHz; no 2.8V option. | Cannot replace dual-rail functionality - requires two devices plus external sequencing logic to match AP7344-3328RH4-7 capability. | Only viable if redesign permits splitting rails across two ICs and accepting higher board area, BOM count, and PSRR penalty. |
Compared with AP7345D-3328RH4-7, the AP7344-3328RH4-7 offers lower cost and identical regulation performance where discharge is unnecessary; versus XC6210B332MR-G, it delivers true dual-rail integration, higher PSRR, and superior noise performance in half the footprint.
Availability
AP7344-3328RH4-7 is available at Aetrix Electronics and suitable for smartphone baseband power, RF front-end biasing, and camera module core supply requiring stable component supply, consistent parametric performance, and long-term production continuity.
Supply support for AP7344-3328RH4-7 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 belongs to Diodes' high-PSRR, low-noise LDO family designed specifically for battery-powered portable electronics demanding dual-rail efficiency, minimal footprint, and robust transient response.
FAQ
What is the thermal pad connection requirement for AP7344-3328RH4-7?
The exposed thermal pad must be connected to a large copper area tied to GND for effective heat dissipation. Per datasheet guidance, this pad should not serve as the sole GND electrode but rather augment the GND plane to reduce junction-to-ambient thermal resistance below 120°C/W. Failure to connect it degrades thermal performance and may trigger thermal shutdown under 300mA load.
Can AP7344-3328RH4-7 operate with 1.0µF output capacitors on both channels?
Yes - the device is explicitly characterized and guaranteed stable with 1.0µF ceramic output capacitors per channel, as confirmed in the Electrical Characteristics table and Application Information section. Using larger values (e.g., 4.7µF) improves load transient response but is not required for stability. ESR must remain below 100mΩ per the ESR vs. Output Current graph.
Is AP7344-3328RH4-7 recommended for new designs?
No - Diodes Incorporated states "THE AP7344 IS NOT RECOMMENDED FOR NEW DESIGNS. PLEASE USE THE AP7345D." The AP7345D is a drop-in pin-and-function replacement with added auto-discharge capability and identical electrical specs. Existing AP7344 designs may continue in production, but new projects should adopt AP7345D for long-term supply assurance.
How does enable sequencing affect startup behavior?
EN1 and EN2 are independent active-high inputs. Driving EN1 high before EN2 enables 3.3V first, allowing controlled power-up of digital logic before analog/RF sections. Startup delay between channels is governed by input capacitor charging time and EN pin rise time; typical turn-on time is <100µs per channel with 1.0µF COUT. Floating EN pins will disable both channels.
AP7344-3328RH4-7 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):
- 2.8V, 3.3V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.3V @ 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
AP7344-3328RH4-7 FAQ
1.How can I place an order for AP7344-3328RH4-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP7344-3328RH4-7 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 AP7344-3328RH4-7 reliable?
The price and inventory of AP7344-3328RH4-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP7344-3328RH4-7 is usually 5 days.
3.What payment methods are accepted for AP7344-3328RH4-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP7344-3328RH4-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP7344-3328RH4-7?
AP7344-3328RH4-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP7344-3328RH4-7 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 AP7344-3328RH4-7?
For technical support, including AP7344-3328RH4-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP7344-3328RH4-7 requirements.
6.How does Aetrix verify that AP7344-3328RH4-7 is sourced from the original manufacturer or authorized distributors?
All AP7344-3328RH4-7 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 AP7344-3328RH4-7 meets industry standards.
7.What is the process for return or replacement of AP7344-3328RH4-7?
All AP7344-3328RH4-7 units undergo pre-shipment inspection (PSI). If there is an issue with AP7344-3328RH4-7, 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 AP7344-3328RH4-7 part is unused and in its original packaging.
Return procedure for AP7344-3328RH4-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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