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Diodes Incorporated AP7344D-1528RH4-7
- Part No.:
- AP7344D-1528RH4-7
- Manufacturer:
- Diodes Incorporated
- Package:
- 8-XFDFN Exposed Pad
- Datasheet:
-
AP7344D-1528RH4-7.pdf
- Description:
- IC REG LIN 1.5V/2.8V X2DFN1612-8
- Quantity:
- Payment:
- Shipping:
Inventory:4,233
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Product details
Overview
AP7344D-1528RH4-7 from Diodes Incorporated is a dual-channel CMOS low-dropout regulator delivering fixed 1.5V 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 portable RF and imaging subsystems.
For engineers reviewing the AP7344D-1528RH4-7 datasheet, AP7344D-1528RH4-7 pinout, AP7344D-1528RH4-7 application, or AP7344D-1528RH4-7 equivalent, key selection criteria include dual-rail low-noise regulation, thermal performance in X2-DFN1612-8, independent EN control timing, and discharge capability for fast VOUT ramp-down in battery-powered devices.
Technical Context
The AP7344D-1528RH4-7 integrates two independent LDO regulators on a single CMOS die, each with dedicated error amplifier, voltage reference, current-limit circuit, and enable input. Its architecture supports simultaneous or staggered activation of both channels without cross-regulation interference.
Each channel features built-in auto-discharge (enabled by the "D" suffix), providing 50Ω on-resistance between VOUT and GND during shutdown to rapidly deplete output capacitance-critical for meeting strict power-state transition requirements in mobile SoC domains.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Channel 1: 1.5V fixed; Channel 2: 2.8V fixed - eliminates external feedback resistors and ensures stable rail generation for core/logic and I/O domains. |
| Output Current | 300mA per channel - sufficient to power baseband processors, camera ISPs, or RF transceivers without thermal derating in compact layouts. |
| PSRR | 75dB at 1kHz - suppresses switching noise from DC/DC converters feeding the LDO input, preserving signal integrity in sensitive analog/RF sections. |
| Output Noise | 60µVrms (10Hz–100kHz) - enables clean power delivery to PLLs, ADCs, and high-speed SerDes without additional filtering. |
| Dropout Voltage | 0.39V max at 300mA for 1.5V output; 0.30V max for 2.8V output - allows operation from single-cell Li-ion (3.0V min) with margin across temperature. |
| Quiescent Current | 100µA typical with both EN pins high - minimizes standby power in always-on sensor or modem subsystems. |
| Enable Threshold | EN high ≥1.3V, EN low ≤0.5V - compatible with 1.8V/3.3V GPIOs without level-shifting, simplifying host MCU interface. |
Pinout & Package
X2-DFN1612-8 package: 1.6mm × 1.2mm × 0.39mm body, 0.4mm pitch, exposed thermal pad (not electrically functional as GND alone; recommended connected to ground plane for thermal relief).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND (Pins 1, 4) | Common ground reference | Dual GND pins reduce ground loop impedance and improve PSRR; must be tied to low-impedance PCB ground plane. |
| VOUT1 (Pin 2) | Channel 1 regulated output | Delivers fixed 1.5V; 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; supports auto-discharge via internal 50Ω switch when EN2 is low, enabling rapid rail collapse. |
| EN2 (Pin 5) | Channel 2 enable input | Active-high logic; floating prohibited - tie to VIN2 or MCU GPIO to control power-up sequence independently from Channel 1. |
| VIN2 (Pin 6) | Channel 2 input supply | Accepts 1.7V–5.25V; requires 0.47µF ceramic decoupling capacitor placed within 2mm of pin to prevent input droop during load steps. |
| VIN1 (Pin 7) | Channel 1 input supply | Independent input path enables split-rail sourcing (e.g., VIN1 from buck converter, VIN2 from battery) for optimized efficiency. |
| EN1 (Pin 8) | Channel 1 enable input | Active-high logic; supports independent sequencing - e.g., enable VOUT1 before VOUT2 to meet SoC boot order requirements. |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent LDOs with auto-discharge | Each channel includes 50Ω internal discharge FET, reducing VOUT decay time from milliseconds to microseconds during shutdown. |
| High PSRR & ultra-low noise | 75dB rejection at 1kHz + 60µVrms broadband noise enables direct powering of RF front-ends and precision analog circuits. |
| ±1% output accuracy over -40°C to +85°C | Ensures reliable operation of voltage-sensitive cores (e.g., ARM Cortex-A/M series) without calibration or margining. |
| Low dropout at full load | 0.30V max dropout for 2.8V output at 300mA allows >90% efficiency from 3.3V input, minimizing thermal stress in space-constrained modules. |
| Wide input range (1.7V–5.25V) | Supports direct connection to single-cell Li-ion (2.7–4.2V), USB 5V, or intermediate buck outputs without pre-regulation. |
Applications
| Smartphone Baseband Power | RF Transceiver Bias |
|---|---|
|
Use Scenario: Supplying 1.5V core and 2.8V I/O rails to application processor and cellular modem in LTE/5G handsets. IC Role / Device Role / Timing Role: Dual-rail LDO providing sequenced, low-noise, and fast-transient power with independent enable control for boot and sleep state transitions. Use Value: Eliminates need for discrete sequencing ICs; 60µVrms noise prevents EVM degradation in 256-QAM transmission; auto-discharge meets 3GPP power-down timing specs. |
Use Scenario: Delivering clean 2.8V bias to PA driver stages and 1.5V to LNA/switch control logic in mmWave front-end modules. IC Role / Device Role / Timing Role: Low-PSRR-sensitive regulator isolating RF section from noisy digital supply domains while supporting fast enable/disable for TDD burst mode. Use Value: 75dB PSRR at 1kHz rejects switching artifacts from nearby PMICs; independent EN pins allow precise RF Tx/Rx rail gating synchronized with TRX control signals. |
| Mobile Camera ISP Core | Portable Media Player Audio Codec |
|
Use Scenario: Powering image signal processor core (1.5V) and MIPI CSI interface (2.8V) in dual-camera smartphone configurations. IC Role / Device Role / Timing Role: Dual-output LDO with matched load regulation (<30mV deviation over 1–300mA) ensuring consistent ISP clock domain stability during variable pixel processing loads. Use Value: ±1% accuracy maintains ADC reference integrity across temperature; 0.30V dropout enables use of shared 3.3V system rail, reducing BOM count. |
Use Scenario: Providing regulated 1.5V for DSP core and 2.8V for DAC/ADC analog section in Bluetooth headphones and portable audio players. IC Role / Device Role / Timing Role: Ultra-low-noise dual LDO replacing discrete solutions to meet THD+N <−100dB requirements in Class-D headphone amplifiers. Use Value: 60µVrms noise avoids audible hiss; 100µA quiescent current extends playback time in battery-limited designs without compromising audio fidelity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-LDO applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AP7345D-1528RH4-7 | Successor device with improved PSRR (80dB @1kHz), lower dropout (0.25V max @2.8V/300mA), and extended temp range (−40°C to +125°C). | Qualified for automotive infotainment and ADAS modules requiring AEC-Q100 Grade 2 compliance. | Select for new designs requiring higher reliability margin, extended temperature support, or tighter regulation under dynamic load. |
| TPL7407LDR | Single-channel 300mA LDO with 1.5V fixed output only; no 2.8V rail or dual-enable capability; 65dB PSRR, 75µVrms noise. | Requires two separate devices to replicate dual-rail functionality, increasing footprint and BOM cost. | Consider only if design already uses TPL7407LDR elsewhere and can tolerate added complexity and degraded noise/PSRR performance. |
Compared with AP7344D-1528RH4-7, the AP7345D offers measurable improvements in PSRR, dropout, and temperature rating-making it preferable for next-gen designs-while the TPL7407LDR lacks integrated dual-rail functionality and delivers inferior noise/PSRR, increasing system-level design effort.
Availability
AP7344D-1528RH4-7 is available at Aetrix Electronics and suitable for smartphone baseband power, RF transceiver bias, mobile camera ISP core, and portable media player audio codec applications requiring stable component supply, long-term lifecycle continuity, and RoHS-compliant green packaging.
Supply support for AP7344D-1528RH4-7 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-PSRR, low-noise LDO portfolio designed specifically for power-sensitive portable electronics where compact size, fast transient response, and rail-specific sequencing are critical.
FAQ
Is AP7344D-1528RH4-7 pin-compatible with AP7344-1528RH4-7?
No. The "D" suffix indicates integrated auto-discharge functionality on both channels, which modifies internal switch topology but retains identical pinout and package (X2-DFN1612-8). Electrical behavior differs during shutdown: AP7344D actively discharges VOUT via 50Ω internal FET, while non-D versions lack this feature and require external discharge circuits.
What is the maximum allowable input voltage for AP7344D-1528RH4-7?
The absolute maximum input voltage is 6.0V, but the recommended operating range is 1.7V to 5.25V per channel. Exceeding 5.25V risks violating safe operating area limits and may trigger thermal shutdown or degrade long-term reliability, even if within absolute max ratings.
Can EN1 and EN2 be tied together and driven by a single GPIO?
Yes, EN1 and EN2 may be connected and driven by one GPIO, enabling simultaneous turn-on/off of both channels. However, doing so forfeits independent sequencing capability-e.g., powering up the 1.5V core before the 2.8V I/O rail-which is often required by application processors and SoCs for proper initialization.
Does AP7344D-1528RH4-7 require external capacitors, and what values are recommended?
Yes. Each channel requires a minimum 0.47µF ceramic input capacitor (CIN) placed within 2mm of VINx and a 1.0µF ceramic output capacitor (COUT) adjacent to VOUTx. For improved transient response under large load steps (e.g., camera flash), a 4.7µF low-ESR ceramic COUT is recommended per channel.
AP7344D-1528RH4-7 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):
- 1.5V, 2.8V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.44V @ 300mA, 0.3V @ 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-1528RH4-7 FAQ
1.How can I place an order for AP7344D-1528RH4-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP7344D-1528RH4-7 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-1528RH4-7 reliable?
The price and inventory of AP7344D-1528RH4-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP7344D-1528RH4-7 is usually 5 days.
3.What payment methods are accepted for AP7344D-1528RH4-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP7344D-1528RH4-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP7344D-1528RH4-7?
AP7344D-1528RH4-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP7344D-1528RH4-7 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-1528RH4-7?
For technical support, including AP7344D-1528RH4-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP7344D-1528RH4-7 requirements.
6.How does Aetrix verify that AP7344D-1528RH4-7 is sourced from the original manufacturer or authorized distributors?
All AP7344D-1528RH4-7 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-1528RH4-7 meets industry standards.
7.What is the process for return or replacement of AP7344D-1528RH4-7?
All AP7344D-1528RH4-7 units undergo pre-shipment inspection (PSI). If there is an issue with AP7344D-1528RH4-7, 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-1528RH4-7 part is unused and in its original packaging.
Return procedure for AP7344D-1528RH4-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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