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Diodes Incorporated AP7344D-1833RH4-7
- Part No.:
- AP7344D-1833RH4-7
- Manufacturer:
- Diodes Incorporated
- Package:
- 8-XFDFN Exposed Pad
- Datasheet:
-
AP7344D-1833RH4-7.pdf
- Description:
- IC REG LIN 1.8V/3.3V X2DFN1612-8
- Quantity:
- Payment:
- Shipping:
Inventory:2,840
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Product details
Overview
AP7344D-1833RH4-7 from Diodes Incorporated is a dual-channel CMOS low-dropout regulator delivering fixed 1.8V and 3.3V 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 targets RF supply rails in compact portable electronics.
For engineers reviewing the AP7344D-1833RH4-7 datasheet, AP7344D-1833RH4-7 pinout, AP7344D-1833RH4-7 application, or AP7344D-1833RH4-7 equivalent, key selection criteria include independent enable control per channel, ultra-low quiescent current (50µA per active channel), thermal-pad-enhanced X2-DFN1612-8 package, and built-in discharge functionality for rapid output discharge during shutdown.
Technical Context
The AP7344D-1833RH4-7 integrates two independent LDO regulators sharing a common ground but with separate VIN, VOUT, and EN pins-enabling asymmetric voltage generation (1.8V/3.3V) and independent power sequencing. Each channel employs a CMOS pass device with low RDS(ON), error amplifier, voltage reference, and current-limit circuitry.
It features dual enable inputs (EN1/EN2) with defined logic thresholds (0–0.5V low, 1.3–5.25V high), auto-discharge capability via integrated 50Ω N-channel FET per output, and guaranteed stability with ≥1µF ceramic output capacitors-supporting fast load transient response (<100µs recovery) and minimal PCB footprint.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltages | Channel 1: 1.8V (fixed); Channel 2: 3.3V (fixed)-enables dual-rail biasing for mixed-signal SoCs without external feedback resistors. |
| Max Output Current | 300mA per channel-supports moderate-power RF ICs, camera ISPs, and baseband processors without thermal derating up to +85°C ambient. |
| Output Accuracy | ±1% at +25°C, ±1.5% over −40°C to +85°C-ensures reliable operation of voltage-sensitive analog circuits like PLLs and ADCs. |
| PSRR | 75dB at 1kHz-rejects switching noise from adjacent DC-DC converters, critical for clean RF supply domains. |
| Output Noise | 60µVrms (10Hz–100kHz)-minimizes phase noise degradation in local oscillators and clock buffers. |
| Quiescent Current | 50µA per enabled channel (typ.)-extends battery life in always-on sensor or standby subsystems. |
| Dropout Voltage | 220mV at 300mA (3.3V channel); 300mV at 300mA (1.8V channel)-allows operation from single-cell Li-ion (3.0V min) or boosted 2.5V rails. |
Pinout & Package
X2-DFN1612-8 package: 1.6mm × 1.2mm, 0.4mm pitch, thermally enhanced with exposed pad (not electrically connected to GND by default; recommended to tie to ground plane for thermal performance).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND (Pins 1, 4) | Power ground reference | Dual ground pins reduce impedance and improve PSRR; must be connected to low-impedance ground plane. |
| VOUT1 (Pin 2) | Channel 1 regulated output | Delivers fixed 1.8V; requires ≥1µF ceramic capacitor placed adjacent to pin for stability and transient response. |
| VOUT2 (Pin 3) | Channel 2 regulated output | Delivers fixed 3.3V; includes internal 50Ω discharge FET-discharges output to <0.1V within ~1ms after EN2 deactivation. |
| EN2 (Pin 5) | Channel 2 enable input | Active-high logic; drives channel 2 into shutdown (ISTANDBY ≤1.0µA) when pulled low; must not float. |
| VIN2 (Pin 6) | Channel 2 input supply | Accepts 1.7–5.25V; decoupled with ≥0.47µF ceramic capacitor close to pin to suppress input ripple. |
| VIN1 (Pin 7) | Channel 1 input supply | Independent input rail-allows separate power domain sourcing (e.g., battery vs. PMIC output) for sequencing control. |
| EN1 (Pin 8) | Channel 1 enable input | Active-high logic; enables/disables 1.8V rail independently-critical for powering down peripheral subsystems without affecting 3.3V domain. |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent enable inputs | EN1 and EN2 support asynchronous power-up/down sequencing-enables staggered startup to limit inrush current in multi-rail systems. |
| Built-in output discharge | 50Ω on-chip N-FET per output rapidly discharges VOUT to <0.1V upon disable-eliminates need for external bleed resistors and prevents back-powering. |
| Ultra-low noise & high PSRR | 60µVrms noise + 75dB PSRR at 1kHz ensures clean supply for RF transceivers and high-resolution ADCs without additional filtering. |
| Wide input voltage range | 1.7V to 5.25V operation supports direct connection to Li-ion batteries (2.8–4.2V), USB 5V, or intermediate DC-DC outputs. |
| Thermally optimized DFN package | X2-DFN1612-8 with exposed thermal pad achieves θJA ≈ 220°C/W-enables 300mA operation in space-constrained mobile PCBs without heatsinks. |
Applications
| Smartphone Baseband Power | RF Front-End Biasing |
|---|---|
|
Use Scenario: Supplying 1.8V I/O and 3.3V RF transceiver sections in LTE/5G smartphone mainboard. IC Role / Device Role / Timing Role: Dual-rail LDO providing isolated, low-noise bias for baseband processor I/O banks and PA driver stages. Use Value: Independent EN control allows dynamic power gating of RF section during sleep mode, reducing system standby current by >200µA. |
Use Scenario: Powering GaAs pHEMT amplifiers and LNA modules in Wi-Fi 6E access points. IC Role / Device Role / Timing Role: Low-noise 3.3V rail for RF amplifier bias; 1.8V rail for digital control interface and envelope tracking logic. Use Value: 75dB PSRR suppresses switching noise from nearby buck converters, improving EVM by ≥1.5dB at 6GHz. |
| Camera Module ISP Supply | Portable Media Player Audio Codec |
|
Use Scenario: Delivering regulated 1.8V core and 3.3V I/O voltages to image signal processors in dual-camera smartphones. IC Role / Device Role / Timing Role: Dual-output LDO replacing discrete regulators-reducing BOM count and layout area by 40%. Use Value: ±1% output accuracy maintains consistent ADC reference voltage across temperature, reducing image white-balance drift by <2K ΔCCT. |
Use Scenario: Powering stereo audio codec and Class-D amplifier in Bluetooth headphones with Li-ion battery input. IC Role / Device Role / Timing Role: 1.8V rail for digital logic; 3.3V rail for headphone driver stage-both sequenced via EN1/EN2 for pop-free startup. Use Value: 60µVrms output noise prevents audible hiss in 24-bit DAC output, meeting SNR >105dB specification. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-LDO applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AP7345D-1833RH4-7 | Successor part with improved PSRR (80dB @ 1kHz), lower dropout (190mV @ 300mA, 3.3V), and extended temp range (−40°C to +125°C). | Qualified for automotive AEC-Q100 Grade 2; supports under-hood infotainment and ADAS camera modules. | Select for new designs requiring higher reliability, wider temperature margin, or tighter regulation under heavy load. |
| TPL7407LDR | Single-channel 300mA LDO (3.3V only); no 1.8V output, no discharge FET, higher quiescent current (120µA). | Lacks dual-rail capability-requires second regulator for 1.8V, increasing board area and cost. | Only viable if 1.8V rail is already available elsewhere; not suitable for space-constrained dual-voltage applications. |
Compared with AP7344D-1833RH4-7, the AP7345D offers superior thermal robustness and noise rejection for next-gen designs, while TPL7407LDR fails to replicate dual-output functionality or discharge capability-making it a partial substitute only in non-critical, single-rail contexts.
Availability
AP7344D-1833RH4-7 is available at Aetrix Electronics and suitable for smartphone baseband power, RF front-end biasing, camera ISP supply, and portable media player audio codec applications requiring stable component supply and long-term industrial availability.
Supply support for AP7344D-1833RH4-7 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 manufacturer specializing in discrete, analog, and mixed-signal solutions for power management, signal integrity, and connectivity applications.
The AP7344 series belongs to Diodes' high-PSRR, low-noise LDO portfolio designed specifically for battery-powered portable electronics where compact size, efficiency, and clean power delivery are critical.
FAQ
What is the function of the thermal pad on the AP7344D-1833RH4-7 package?
The exposed thermal pad on the X2-DFN1612-8 package is intended for thermal dissipation-not electrical grounding. Diodes recommends connecting it to a large copper pour tied to the PCB ground plane to achieve optimal thermal resistance (θJA ≈ 220°C/W). Leaving it unconnected or using it solely as a GND electrode degrades thermal performance and risks thermal shutdown under full 300mA load.
Can AP7344D-1833RH4-7 operate with only one channel enabled?
Yes-EN1 and EN2 are fully independent. Enabling only EN1 delivers 1.8V at up to 300mA while EN2 remains low (shutdown), drawing ≤1.0µA standby current. Similarly, enabling only EN2 provides 3.3V output. This allows flexible power partitioning in multi-subsystem devices without cross-channel interaction or shared quiescent current penalties.
Is external output capacitance required, and what type is recommended?
Yes-minimum 1.0µF ceramic capacitor is required per VOUT pin for stability and transient response. X5R or X7R dielectrics with ≤100mΩ ESR are recommended. For high-dynamic-load applications (e.g., burst-mode RF transmission), adding a 4.7µF bulk capacitor in parallel improves droop suppression. Capacitors must be placed within 2mm of respective VOUT and GND pins.
Does AP7344D-1833RH4-7 support reverse current blocking?
No-the AP7344D-1833RH4-7 does not integrate reverse current blocking. If VOUT exceeds VIN (e.g., during hot-swap or backup battery scenarios), current can flow backward through the pass FET. External Schottky diodes or ideal diode controllers are required in systems where reverse current protection is mandatory.
AP7344D-1833RH4-7 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):
- 1.8V, 3.3V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.39V @ 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-1833RH4-7 FAQ
1.How can I place an order for AP7344D-1833RH4-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP7344D-1833RH4-7 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-1833RH4-7 reliable?
The price and inventory of AP7344D-1833RH4-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP7344D-1833RH4-7 is usually 5 days.
3.What payment methods are accepted for AP7344D-1833RH4-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP7344D-1833RH4-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP7344D-1833RH4-7?
AP7344D-1833RH4-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP7344D-1833RH4-7 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-1833RH4-7?
For technical support, including AP7344D-1833RH4-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP7344D-1833RH4-7 requirements.
6.How does Aetrix verify that AP7344D-1833RH4-7 is sourced from the original manufacturer or authorized distributors?
All AP7344D-1833RH4-7 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-1833RH4-7 meets industry standards.
7.What is the process for return or replacement of AP7344D-1833RH4-7?
All AP7344D-1833RH4-7 units undergo pre-shipment inspection (PSI). If there is an issue with AP7344D-1833RH4-7, 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-1833RH4-7 part is unused and in its original packaging.
Return procedure for AP7344D-1833RH4-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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