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Diodes Incorporated AP7344D-1218RH4-7
- Part No.:
- AP7344D-1218RH4-7
- Manufacturer:
- Diodes Incorporated
- Package:
- 8-XFDFN Exposed Pad
- Datasheet:
-
AP7344D-1218RH4-7.pdf
- Description:
- IC REG LIN 1.2V/1.8V X2DFN1612-8
- Quantity:
- Payment:
- Shipping:
Inventory:1,268
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Product details
Overview
AP7344D-1218RH4-7 from Diodes Incorporated is a dual-channel CMOS low-dropout regulator delivering fixed 1.2V and 1.8V 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, targeting RF supply and portable media subsystems.
For engineers reviewing the AP7344D-1218RH4-7 datasheet, AP7344D-1218RH4-7 pinout, AP7344D-1218RH4-7 application, or AP7344D-1218RH4-7 equivalent, key selection criteria include dual-rail low-noise biasing, thermal performance in X2-DFN1612-8, channel-specific enable timing, and discharge capability for rapid VOUT decay during shutdown.
Technical Context
The AP7344D-1218RH4-7 integrates two independent LDO regulators on a single CMOS die, each with dedicated error amplifier, voltage reference, current-limit circuit, and EN pin. Its architecture enables simultaneous regulation of asymmetric rails-1.2V for core logic and 1.8V for I/O or RF circuitry-without cross-regulation coupling.
Each channel features built-in auto-discharge (enabled by 'D' suffix), providing ~50Ω N-channel pull-down between VOUT and GND when EN is low. The device maintains stability with ≥1.0µF ceramic output capacitors and achieves <0.39V dropout at 300mA for the 1.8V rail.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltages | Channel 1: 1.2V (±1% over -40°C to +85°C); Channel 2: 1.8V (±1% over -40°C to +85°C) |
| Max Output Current | 300mA per channel-supports sustained bias for dual-rail SoC subsystems or RF front-end ICs |
| PSRR | 75dB at 1kHz-rejects switching noise from adjacent DC/DC converters feeding shared input rail |
| Output Noise | 60µVrms (10Hz–100kHz)-meets low-phase-noise requirements for RF synthesizer VCO supplies |
| Dropout Voltage | 0.48V max at 300mA for 1.2V rail; 0.35V max at 300mA for 1.8V rail-enables operation from single-cell Li-ion (3.0V min) with margin |
| Quiescent Current | 100µA typical with both EN pins high-minimizes standby power in always-on sensor or modem modules |
| Enable Thresholds | EN low ≤0.5V (shutdown); EN high ≥1.3V (active)-compatible with 1.8V/3.3V GPIO without level-shifting |
Pinout & Package
X2-DFN1612-8 package: 1.6mm × 1.2mm × 0.39mm body, 0.4mm pitch, thermal pad exposed on bottom for PCB copper pour connection to GND.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND (Pins 1, 4) | Power ground reference | Common return path for both regulators; must connect to low-impedance PCB ground plane |
| VOUT1 (Pin 2) | Channel 1 regulated output | Delivers fixed 1.2V; requires local 1.0µF ceramic capacitor to GND for stability |
| VOUT2 (Pin 3) | Channel 2 regulated output | Delivers fixed 1.8V; includes integrated discharge FET activated when EN2 = low |
| EN2 (Pin 5) | Channel 2 enable input | Active-high logic control; floating state prohibited-must be tied to VIN2 or GND |
| VIN2 (Pin 6) | Channel 2 input supply | Accepts 1.7V–5.25V; decoupled by 1.0µF ceramic capacitor close to pin |
| VIN1 (Pin 7) | Channel 1 input supply | Independent input rail-allows separate power domain sourcing for noise isolation |
| EN1 (Pin 8) | Channel 1 enable input | Active-high logic control; supports staggered power-up sequencing with EN2 |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent LDOs | Enables discrete power management for 1.2V core + 1.8V I/O rails without external sequencing IC |
| Auto-discharge on both channels | Ensures rapid VOUT decay (<100µs) during shutdown-prevents latch-up in downstream logic |
| High PSRR (75dB @ 1kHz) | Suppresses ripple from noisy buck converters sharing same battery input, critical for RF signal integrity |
| Low 60µVrms output noise | Meets stringent noise floor requirements for analog sensor interfaces and PLL reference supplies |
| Ultra-low quiescent current (100µA typ) | Extends battery life in always-on wearable devices with dual-rail sensor hubs |
Applications
| Smartphone Baseband Power | RF Transceiver Bias |
|---|---|
|
Use Scenario: Dual-rail power for application processor core (1.2V) and memory interface (1.8V) in LTE/5G smartphones. IC Role / Device Role / Timing Role: Primary LDO supplying clean, sequenced voltage domains with independent enable control for power-state transitions. Use Value: Eliminates need for two discrete single-channel LDOs, reducing BOM count and PCB area while maintaining rail isolation. |
Use Scenario: Low-noise bias for PA driver stage and LNA in Wi-Fi 6E front-end modules. IC Role / Device Role / Timing Role: Dedicated 1.8V LDO channel provides stable supply with minimal phase noise injection into RF signal paths. Use Value: 60µVrms noise and 75dB PSRR prevent AM-to-PM distortion in high-efficiency PAs operating near EVM limits. |
| Portable Camera Module | Wireless Audio Codec |
|
Use Scenario: Powering image sensor analog core (1.2V) and digital interface (1.8V) in compact camera modules. IC Role / Device Role / Timing Role: Dual-output LDO delivers tightly regulated rails with fast load transient response to handle burst-mode pixel readout. Use Value: <0.4V dropout at 300mA ensures operation down to 2.2V battery voltage, extending usable runtime per charge cycle. |
Use Scenario: Supplying ADC/DAC analog section (1.2V) and digital controller (1.8V) in Bluetooth LE earbud codecs. IC Role / Device Role / Timing Role: Enables independent shutdown of digital logic while maintaining analog bias during low-power listening mode. Use Value: 0.1µA standby current (both EN low) minimizes leakage during multi-day storage without battery drain. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-LDO applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AP7345D-1218RH4-7 | Successor part with identical pinout, same 1.2V/1.8V outputs, improved PSRR (80dB @ 1kHz), lower noise (45µVrms), and extended temperature range (−40°C to +125°C). | Qualified for automotive AEC-Q100 Grade 2; suitable for under-hood infotainment power rails where ambient exceeds +85°C. | Select for new designs requiring higher reliability, longer lifetime, or automotive qualification. |
| TPL7407LDR | Single 7-channel high-side driver with integrated LDO-like regulation; no dual fixed-voltage outputs, no enable per channel, 300mA total sink current across all channels. | Designed for LED matrix and relay driving-not a voltage regulator replacement; lacks precision output accuracy or low-noise performance. | Not a functional substitute; only consider if system requires high-side switching rather than regulated bias. |
Compared with AP7344D-1218RH4-7, the AP7345D-1218RH4-7 offers measurable improvements in noise, PSRR, and temperature rating while maintaining drop-in compatibility-making it the preferred choice for production ramp. The TPL7407LDR serves an entirely different function and cannot replace dual-rail LDO functionality.
Availability
AP7344D-1218RH4-7 is available at Aetrix Electronics and suitable for smartphone baseband power, RF transceiver bias, and portable camera module applications requiring stable component supply, long-lifecycle support, and consistent parametric performance across manufacturing lots.
Supply support for AP7344D-1218RH4-7 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 company specializing in discrete, analog, and mixed-signal solutions, with design centers across Asia, Europe, and the US, and manufacturing in IATF 16949-certified facilities.
The AP7344 series belongs to Diodes' high-PSRR, low-noise LDO portfolio, engineered specifically for battery-powered portable electronics demanding ultra-low quiescent current and dual-rail flexibility in minimal footprint packages.
FAQ
What is the thermal pad connection requirement for AP7344D-1218RH4-7?
The thermal pad (exposed bottom metal) must be connected to a large PCB copper area tied to GND for optimal thermal dissipation. It is not a functional GND pin but improves junction-to-board thermal resistance by up to 40°C/W. Do not use it as the sole GND connection-maintain separate GND pin connections (Pins 1 and 4) for low-impedance return paths.
Does AP7344D-1218RH4-7 support independent power sequencing between channels?
Yes-EN1 and EN2 are fully independent, allowing precise control of startup/shutdown order. For example, enabling EN1 (1.2V rail) 100µs before EN2 (1.8V rail) meets typical SoC power-up sequencing requirements. Each EN pin has defined thresholds (≤0.5V low, ≥1.3V high) and leakage <1.0µA, ensuring robust GPIO interfacing.
Can AP7344D-1218RH4-7 operate with input voltage below 1.7V?
No-the absolute minimum input voltage is 1.7V per datasheet Absolute Maximum Ratings and Recommended Operating Conditions. Operation below this threshold risks improper regulation, increased dropout, or failure to maintain output accuracy. For sub-1.7V inputs, consider alternative regulators such as the AP2204K-12 (1.2V fixed, 1.6V min VIN) or custom adjustable LDO solutions.
Is AP7344D-1218RH4-7 recommended for new designs?
No-the datasheet explicitly states "THE AP7344 IS NOT RECOMMENDED FOR NEW DESIGNS. PLEASE USE THE AP7345D." While AP7344D-1218RH4-7 remains available for legacy program support and existing production, Diodes recommends AP7345D-1218RH4-7 for all new designs due to its enhanced specifications and automotive qualification readiness.
AP7344D-1218RH4-7 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):
- 1.2V, 1.8V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.5V @ 300mA, 0.39V @ 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-1218RH4-7 FAQ
1.How can I place an order for AP7344D-1218RH4-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP7344D-1218RH4-7 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-1218RH4-7 reliable?
The price and inventory of AP7344D-1218RH4-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP7344D-1218RH4-7 is usually 5 days.
3.What payment methods are accepted for AP7344D-1218RH4-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP7344D-1218RH4-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP7344D-1218RH4-7?
AP7344D-1218RH4-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP7344D-1218RH4-7 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-1218RH4-7?
For technical support, including AP7344D-1218RH4-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP7344D-1218RH4-7 requirements.
6.How does Aetrix verify that AP7344D-1218RH4-7 is sourced from the original manufacturer or authorized distributors?
All AP7344D-1218RH4-7 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-1218RH4-7 meets industry standards.
7.What is the process for return or replacement of AP7344D-1218RH4-7?
All AP7344D-1218RH4-7 units undergo pre-shipment inspection (PSI). If there is an issue with AP7344D-1218RH4-7, 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-1218RH4-7 part is unused and in its original packaging.
Return procedure for AP7344D-1218RH4-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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