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Diodes Incorporated AP7345D-1833RH4-7
- Part No.:
- AP7345D-1833RH4-7
- Manufacturer:
- Diodes Incorporated
- Package:
- 8-XFDFN Exposed Pad
- Datasheet:
-
AP7345D-1833RH4-7.pdf
- Description:
- IC REG LIN 1.8V/3.3V 300MA 8DFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,960
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Product details
Overview
AP7345D-1833RH4-7 from Diodes Incorporated is a dual-channel CMOS low-dropout regulator delivering fixed 1.8V and 3.3V outputs with ±1% accuracy, 300mA per channel, 75dB PSRR at 1kHz, and 60µVrms output noise (10Hz–100kHz). It operates from 1.7V to 5.25V input and supports independent enable control for each channel-ideal for powering RF sections and baseband processors in compact portable electronics.
For engineers reviewing the AP7345D-1833RH4-7 datasheet, AP7345D-1833RH4-7 pinout, AP7345D-1833RH4-7 application, or AP7345D-1833RH4-7 equivalent, key selection criteria include dual-rail voltage accuracy, low-noise performance under dynamic load, thermal shutdown behavior (+150°C threshold), and X2-DFN1612-8 package compatibility with high-density PCB layouts.
Technical Context
The AP7345D-1833RH4-7 integrates two independent LDO regulators on a single die, each featuring a precision voltage reference, error amplifier, current-limit circuit, and dedicated enable input. Its CMOS architecture enables ultra-low quiescent current (50µA per active channel) and fast transient response-demonstrated by <20µs turn-on time and <40µs load-step recovery (50mA→300mA).
Each channel maintains stable regulation across -40°C to +85°C ambient temperature, with dropout voltages as low as 0.22V (at 3.3V output, 300mA) and built-in short-circuit protection clamping output current to ~55mA. Thermal pad design supports PCB-level heat dissipation without requiring soldered GND connection.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltages | Fixed 1.8V (Channel 1) and 3.3V (Channel 2); eliminates external resistor networks and reduces BOM count. |
| Output Accuracy | ±1% at +25°C, ±1.5% over full temperature range; ensures reliable logic-level compliance for 1.8V I/O and 3.3V peripherals. |
| PSRR | 75dB at 1kHz; suppresses switching noise from adjacent DC/DC converters feeding shared input rails. |
| Output Noise | 60µVrms (10Hz–100kHz); meets stringent analog/RF supply requirements without additional filtering. |
| Quiescent Current | 50µA per active channel; extends battery life in always-on subsystems like real-time clocks or sensor interfaces. |
| Dropout Voltage | 0.22V at 3.3V/300mA; enables operation from single-cell Li-ion (3.0V min) while maintaining regulation. |
| Enable Thresholds | EN high ≥1.3V, EN low ≤0.5V; compatible with 1.8V and 3.3V GPIOs without level-shifting. |
Pinout & Package
The AP7345D-1833RH4-7 is housed in an X2-DFN1612-8 package (1.6mm × 1.2mm, 0.4mm height) with wettable flank leads and an exposed thermal pad. The package supports automated optical inspection (AOI) and provides low thermal resistance when connected to PCB copper area.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND (Pins 1, 4) | Common ground reference | Two separate GND pins reduce ground loop impedance and improve PSRR; must be tied to same system ground plane. |
| VOUT1 (Pin 2) | Channel 1 regulated output | Delivers fixed 1.8V; requires local 1µF ceramic capacitor for stability and transient response. |
| VOUT2 (Pin 3) | Channel 2 regulated output | Delivers fixed 3.3V; independent of VOUT1-enables sequencing or independent shutdown. |
| EN2 (Pin 5) | Channel 2 enable input | Active-high logic control; floating state prohibited-must be pulled to VIN2 or GND via resistor. |
| VIN2 (Pin 6) | Channel 2 input supply | Accepts 1.7V–5.25V; may be shared with VIN1 or supplied independently for rail isolation. |
| VIN1 (Pin 7) | Channel 1 input supply | Input for 1.8V LDO; decoupling capacitor required within 2mm of pin for EMI suppression. |
| EN1 (Pin 8) | Channel 1 enable input | Independent control allows staggered power-up-e.g., enable 1.8V core before 3.3V I/O. |
| Thermal Pad | Thermal dissipation interface | Not electrically functional; recommended to connect to large copper pour tied to GND for thermal relief. |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent enable inputs | EN1 and EN2 allow per-channel power sequencing, standby mode partitioning, and fault isolation. |
| Ultra-low output noise | 60µVrms enables direct powering of RF transceivers, ADC references, and PLL VCO supplies without added LC filtering. |
| High PSRR across frequency | 75dB at 1kHz and maintained >50dB up to 100kHz-critical for rejecting noise from switching regulators in PMIC systems. |
| Low dropout with wide VIN range | Supports 1.7V–5.25V input while regulating down to 1.8V/3.3V; accommodates aging batteries and variable input sources. |
| Short-circuit foldback protection | Limits output current to ~55mA during VOUT short-to-GND, preventing thermal runaway and enabling safe auto-recovery. |
Applications
| Smartphone Baseband Power | RF Front-End Supply |
|---|---|
|
Use Scenario: Dual-rail power delivery to application processor (1.8V core) and communication ICs (3.3V I/O). IC Role / Device Role / Timing Role: Primary LDO supplying critical voltage domains with independent enable control for power-state transitions. Use Value: Enables precise sequencing (1.8V before 3.3V), reduces system-level ripple coupling, and lowers standby current via selective channel disable. |
Use Scenario: Clean biasing of PA drivers, LNAs, and mixer stages in sub-6GHz cellular modules. IC Role / Device Role / Timing Role: Low-noise, high-PSRR post-regulator for RF signal chain components sensitive to supply perturbation. Use Value: Maintains EVM integrity under dynamic transmit load by suppressing broadband switching noise from shared PMIC inputs. |
| Camera Module Core Logic | Portable Media Decoder |
|
Use Scenario: Powering image sensor digital core (1.8V) and analog front-end (3.3V) in multi-megapixel mobile cameras. IC Role / Device Role / Timing Role: Dual-output LDO providing isolated, low-noise rails to minimize crosstalk between digital and analog domains. Use Value: Prevents digital switching noise from degrading analog pixel readout SNR-verified by <60µVrms noise floor. |
Use Scenario: Supplying video decoder SoC requiring tightly regulated 1.8V logic and 3.3V memory interface rails. IC Role / Device Role / Timing Role: Compact dual-LDO replacing discrete solutions to meet strict board space constraints in slim form factors. Use Value: X2-DFN1612-8 footprint (1.92mm²) saves >60% area versus two SOT-23-5 regulators while maintaining thermal performance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-output LDO applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Torex XC6216D1833MR-G | Same 1.8V/3.3V dual output, but only 200mA per channel and 65dB PSRR at 1kHz. | Limited peak current capability; unsuitable for burst-mode RF loads exceeding 250mA. | Select when lower cost is prioritized over transient headroom and noise margin. |
| Ricoh RP512L1833-AE | Higher quiescent current (120µA active), no thermal shutdown, and larger DFN2020-8 package. | Reduced thermal safety margin and less suitable for thermally constrained handheld enclosures. | Choose only if legacy qualification or specific AEC-Q200 alignment is required. |
Compared with XC6216D1833MR-G and RP512L1833-AE, the AP7345D-1833RH4-7 delivers superior current capability (300mA), lower noise (60µVrms vs ≥80µVrms), and integrated thermal protection-making it optimal for next-gen portable RF and imaging systems demanding reliability in tight thermal envelopes.
Availability
AP7345D-1833RH4-7 is available at Aetrix Electronics and suitable for smartphone baseband power, RF front-end supply, camera module core logic, and portable media decoder applications requiring stable component supply, consistent parametric performance, and long-term lifecycle support.
Supply support for AP7345D-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 manufacturer of discrete semiconductors and analog ICs, specializing in high-efficiency power management, signal integrity, and protection solutions for consumer, industrial, and automotive markets.
The AP7345D belongs to Diodes' high-PSRR, low-noise LDO family designed specifically for noise-sensitive portable electronics where dual-rail regulation, minimal footprint, and robust transient response are mandatory.
FAQ
What are the absolute maximum input voltage and operating temperature limits for AP7345D-1833RH4-7?
The AP7345D-1833RH4-7 has an absolute maximum input voltage of 6.0V and operates across -40°C to +85°C ambient temperature. Exceeding 6.0V on VIN or EN pins risks permanent damage; operation outside the specified temperature range may cause output inaccuracy or premature thermal shutdown activation.
Can the thermal pad be left unconnected in the PCB layout?
Yes-the thermal pad is not electrically functional and may be left floating or connected to GND via thermal vias. However, Diodes recommends connecting it to a large copper pour tied to GND to improve thermal dissipation, especially under sustained 300mA load conditions where junction temperature rise exceeds 40°C.
Does AP7345D-1833RH4-7 support automatic output discharge when disabled?
Yes-the "D" suffix in AP7345D indicates built-in auto-discharge circuitry on both channels. When EN1 or EN2 is pulled low, the corresponding VOUT pin is actively discharged through an internal ~30Ω N-channel MOSFET, ensuring rapid voltage decay (<1ms to <0.1V) and preventing unintended device wake-up.
What is the minimum recommended output capacitance for stable operation?
A minimum 1.0µF ceramic capacitor is required on each VOUT pin, placed within 2mm of the device. Lower ESR capacitors (e.g., X5R/X7R MLCCs) improve transient response and stability; bulk tantalum or polymer caps may be added in parallel for high-slew-load applications like camera flash drivers.
AP7345D-1833RH4-7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- 8-XFDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- 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):
- 70 µA
- PSRR:
- 75dB (1kHz)
- Control Features:
- Current Limit, Enable
- Protection Features:
- Short Circuit
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- X2-DFN1612-8
AP7345D-1833RH4-7 FAQ
1.How can I place an order for AP7345D-1833RH4-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP7345D-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 AP7345D-1833RH4-7 reliable?
The price and inventory of AP7345D-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 AP7345D-1833RH4-7 is usually 5 days.
3.What payment methods are accepted for AP7345D-1833RH4-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP7345D-1833RH4-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP7345D-1833RH4-7?
AP7345D-1833RH4-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP7345D-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 AP7345D-1833RH4-7?
For technical support, including AP7345D-1833RH4-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP7345D-1833RH4-7 requirements.
6.How does Aetrix verify that AP7345D-1833RH4-7 is sourced from the original manufacturer or authorized distributors?
All AP7345D-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 AP7345D-1833RH4-7 meets industry standards.
7.What is the process for return or replacement of AP7345D-1833RH4-7?
All AP7345D-1833RH4-7 units undergo pre-shipment inspection (PSI). If there is an issue with AP7345D-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 AP7345D-1833RH4-7 part is unused and in its original packaging.
Return procedure for AP7345D-1833RH4-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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