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Diodes Incorporated AP7344D-1815RH4-7
- Part No.:
- AP7344D-1815RH4-7
- Manufacturer:
- Diodes Incorporated
- Package:
- 8-XFDFN Exposed Pad
- Datasheet:
-
AP7344D-1815RH4-7.pdf
- Description:
- IC REG LIN 1.5V/1.8V X2DFN1612-8
- Quantity:
- Payment:
- Shipping:
Inventory:4,113
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Product details
Overview
AP7344D-1815RH4-7 from Diodes Incorporated is a dual-channel CMOS low-dropout regulator delivering fixed 1.8V and 1.5V 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 features independent enable pins for power sequencing in compact portable electronics.
For engineers reviewing the AP7344D-1815RH4-7 datasheet, AP7344D-1815RH4-7 pinout, AP7344D-1815RH4-7 application, or AP7344D-1815RH4-7 equivalent, key selection criteria include dual-rail low-noise biasing, high PSRR for RF supply isolation, thermal performance in X2-DFN1612-8, and discharge capability for fast VOUT ramp-down in battery-powered systems.
Technical Context
The AP7344D-1815RH4-7 integrates two independent LDO channels on a single CMOS die, each with dedicated error amplifier, voltage reference, current-limit circuit, and EN control. Its architecture supports simultaneous or staggered enable/disable via EN1 and EN2, enabling precise power domain control without cross-talk.
Each channel delivers regulated output with dropout voltages as low as 0.22V (at 300mA, VOUT > 3.0V) and maintains stability with 1.0µF ceramic output capacitors. The device includes short-circuit protection (≈55mA foldback) and thermal shutdown, with operation specified across –40°C to +85°C ambient.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Channel 1: 1.8V fixed; Channel 2: 1.5V fixed - eliminates external feedback resistors and ensures rail-specific biasing for mixed-signal SoCs. |
| Output Accuracy | ±1% at +25°C, ±1.5% over –40°C to +85°C - enables reliable ADC reference and PLL VCO supply without calibration overhead. |
| PSRR | 75dB at 1kHz - suppresses switching noise from upstream DC/DC converters feeding RF transceivers or camera ISPs. |
| Output Noise | 60µVrms (10Hz–100kHz) - meets low-jitter clock generator and high-resolution audio codec supply requirements. |
| Quiescent Current | 50µA per enabled channel (typical) - extends battery life in always-on sensor nodes and standby modes. |
| Dropout Voltage | 0.35V max at 300mA for 1.8V output - allows operation from single-cell Li-ion (3.0V min) with margin for aging and load transients. |
| Enable Thresholds | EN high ≥1.3V, EN low ≤0.5V - compatible with 1.8V/3.3V GPIOs without level-shifting in modern microcontrollers. |
Pinout & Package
The AP7344D-1815RH4-7 is housed in an X2-DFN1612-8 package (1.6mm × 1.2mm, 0.4mm pitch), featuring an exposed thermal pad for enhanced heat dissipation. PCB layout requires connection of the thermal pad to GND plane for optimal thermal performance.
| 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 | Delivers stable 1.8V to core logic or I/O domains; requires local 1.0µF ceramic capacitor placed adjacent to pin. |
| VOUT2 (Pin 3) | Channel 2 regulated output | Delivers stable 1.5V to memory interfaces or analog subsystems; shares no internal path with VOUT1 for rail isolation. |
| EN2 (Pin 5) | Channel 2 enable control | Active-high logic input; floating state prohibited - tie to VIN or GND if unused to prevent erratic shutdown. |
| VIN2 (Pin 6) | Channel 2 input supply | Accepts 1.7V–5.25V; may be tied to VIN1 or powered separately for supply domain partitioning. |
| VIN1 (Pin 7) | Channel 1 input supply | Independent input allows different source rails (e.g., buck converter vs. battery direct) per channel. |
| EN1 (Pin 8) | Channel 1 enable control | Enables/disables VOUT1 independently; supports power sequencing where 1.8V must ramp before 1.5V or vice versa. |
| Thermal Pad | Thermal dissipation node | Not electrically functional as GND; must be soldered to large copper area connected to system GND for thermal reliability. |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent LDOs | Two fully isolated regulation paths with separate EN, VIN, and VOUT pins - enables flexible power sequencing and fault containment. |
| Integrated discharge FET | 50Ω on-resistance (typical) between VOUT and GND when disabled - discharges output capacitance within microseconds, preventing hold-up voltage in sleep transitions. |
| Ultra-low noise | 60µVrms output noise (10Hz–100kHz) - avoids phase noise degradation in RF synthesizers and jitter accumulation in high-speed SerDes links. |
| High PSRR at low frequency | 75dB rejection at 1kHz - critical for rejecting ripple from switching regulators powering sensitive analog front-ends. |
| Wide input range | 1.7V to 5.25V operation - supports direct battery input (Li-ion, Li-Po, NiMH) and compatibility with multiple upstream DC/DC topologies. |
Applications
| Smartphone Baseband Power | RF Transceiver Bias |
|---|---|
|
Use Scenario: Dual-rail power for application processor core (1.8V) and memory interface (1.5V) in LTE/5G smartphones. IC Role / Device Role / Timing Role: Primary LDO supplying clean, sequenced voltage to SoC domains during boot and dynamic DVFS transitions. Use Value: Independent EN control enables strict power-up order (core before I/O), while 60µVrms noise prevents digital switching noise from corrupting analog PHY timing margins. |
Use Scenario: Low-noise bias for PA driver stages and LNA supply in sub-6GHz RF front-end modules. IC Role / Device Role / Timing Role: Local post-regulator isolating RF ICs from noisy system PMIC rails. Use Value: 75dB PSRR at 1kHz suppresses switching artifacts from buck converters, maintaining EVM < 2.5% in 256-QAM transmission. |
| Camera Image Signal Processor | Portable Media Player Audio Codec |
|
Use Scenario: Dedicated 1.8V supply for ISP digital logic and 1.5V for analog pixel processing blocks in multi-megapixel mobile cameras. IC Role / Device Role / Timing Role: Dual-output LDO co-located near image sensor module to minimize trace inductance and EMI coupling. Use Value: Discharge FET rapidly clears residual charge on decoupling caps during camera mode switch, eliminating ghosting artifacts in next frame capture. |
Use Scenario: Clean bias for stereo DAC and headphone amplifier in Bluetooth-enabled portable media players. IC Role / Device Role / Timing Role: Low-noise linear regulator replacing inefficient discrete solutions in space-constrained audio subsystems. Use Value: 60µVrms noise floor ensures SNR > 105dB(A) in 24-bit/96kHz playback, meeting Hi-Res Audio certification requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-LDO applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AP7345D-1815RH4-7 | Successor part with identical pinout, same 1.8V/1.5V outputs, but improved PSRR (80dB @ 1kHz) and lower quiescent current (45µA typ). | Same use cases; preferred for new designs requiring extended battery life or tighter noise budgets. | Select AP7345D for new designs - Diodes explicitly states AP7344 is not recommended for new designs. |
| TPL7407LDR | Single-channel 300mA LDO (1.8V only), no discharge FET, higher quiescent current (120µA), 65dB PSRR. | Lacks second output and fast discharge - requires additional regulator for 1.5V rail and risks hold-up voltage in deep-sleep states. | Only suitable if 1.5V rail is sourced elsewhere and discharge is not required; not a drop-in replacement. |
Compared with AP7344D-1815RH4-7, the AP7345D offers measurable improvements in PSRR and IQ for new designs, while TPL7407LDR sacrifices dual-rail integration and discharge functionality - making it viable only in simplified, single-rail architectures with relaxed transient response requirements.
Availability
AP7344D-1815RH4-7 is available at Aetrix Electronics and suitable for smartphone baseband power, RF transceiver bias, and camera ISP supply requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for AP7344D-1815RH4-7 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 high-performance power management, signal integrity, and connectivity solutions for consumer, industrial, and automotive markets.
The AP7344 series belongs to Diodes' precision dual-LDO product line, engineered specifically for space-constrained, battery-operated portable electronics demanding ultra-low noise, high PSRR, and independent rail control.
FAQ
Is AP7344D-1815RH4-7 pin-compatible with AP7345D-1815RH4-7?
Yes - both devices share identical X2-DFN1612-8 packaging, pin numbering, and pin functions. The AP7345D is a direct functional upgrade with improved PSRR (80dB vs. 75dB) and lower quiescent current (45µA vs. 50µA), requiring no PCB layout changes.
What is the purpose of the discharge FET in the 'D' suffix variant?
The integrated discharge FET (50Ω typical on-resistance) actively pulls VOUT to GND when the regulator is disabled via EN, clearing output capacitance within microseconds. This prevents residual voltage from interfering with system sleep/wake transitions or causing latch-up in downstream logic.
Can AP7344D-1815RH4-7 operate with only one channel enabled?
Yes - EN1 and EN2 are fully independent. Either channel can be enabled or disabled without affecting the other. When one channel is disabled, its quiescent current drops to ≤1.0µA (standby), while the active channel maintains full regulation performance and load capability.
What is the minimum recommended output capacitor for stable operation?
A 1.0µF X5R/X7R ceramic capacitor placed adjacent to each VOUT pin is the minimum recommended value. The device remains stable with ESR as low as 1mΩ, but for high-transient loads (e.g., burst-mode RF transmission), adding a 4.7µF bulk capacitor in parallel improves droop suppression.
AP7344D-1815RH4-7 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, 1.8V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.44V @ 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-1815RH4-7 FAQ
1.How can I place an order for AP7344D-1815RH4-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP7344D-1815RH4-7 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-1815RH4-7 reliable?
The price and inventory of AP7344D-1815RH4-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP7344D-1815RH4-7 is usually 5 days.
3.What payment methods are accepted for AP7344D-1815RH4-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP7344D-1815RH4-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP7344D-1815RH4-7?
AP7344D-1815RH4-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP7344D-1815RH4-7 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-1815RH4-7?
For technical support, including AP7344D-1815RH4-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP7344D-1815RH4-7 requirements.
6.How does Aetrix verify that AP7344D-1815RH4-7 is sourced from the original manufacturer or authorized distributors?
All AP7344D-1815RH4-7 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-1815RH4-7 meets industry standards.
7.What is the process for return or replacement of AP7344D-1815RH4-7?
All AP7344D-1815RH4-7 units undergo pre-shipment inspection (PSI). If there is an issue with AP7344D-1815RH4-7, 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-1815RH4-7 part is unused and in its original packaging.
Return procedure for AP7344D-1815RH4-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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