My Inquiry
My Account
Diodes Incorporated AP7345D-3318RH4-7
- Part No.:
- AP7345D-3318RH4-7
- Manufacturer:
- Diodes Incorporated
- Package:
- 8-XFDFN Exposed Pad
- Datasheet:
-
AP7345D-3318RH4-7.pdf
- Description:
- IC REG LIN 3.3V/1.8V 300MA 8DFN
- Quantity:
- Payment:
- Shipping:
Inventory:16,506
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
AP7345D-3318RH4-7 from Diodes Incorporated is a dual-channel CMOS low-dropout regulator delivering fixed 3.3V 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 for power sequencing in space-constrained portable electronics.
For engineers reviewing the AP7345D-3318RH4-7 datasheet, AP7345D-3318RH4-7 pinout, AP7345D-3318RH4-7 application, or AP7345D-3318RH4-7 equivalent, key selection criteria include dual-rail low-noise supply capability, thermal performance in X2-DFN1612-8, independent EN pin timing, dropout voltage below 290mV at 3.3V/300mA, and built-in short-circuit protection with auto-discharge.
Technical Context
The AP7345D-3318RH4-7 integrates two independent LDO regulators on a single die, each with dedicated error amplifier, voltage reference, current-limit circuit, and NMOS pass transistor. Its CMOS process enables ultra-low quiescent current (50µA per active channel) and fast load transient response (≤40µs recovery for 50mA–300mA step).
Each channel features separate enable inputs (EN1/EN2), thermal shutdown at +150°C with +20°C hysteresis, and built-in output discharge via 30Ω internal N-channel switch when disabled. The device requires no external compensation and remains stable with 1µF ceramic output capacitors.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltages | Fixed 3.3V (Channel 1) and 1.8V (Channel 2); eliminates external resistor networks and ensures rail-specific biasing for RF and core logic. |
| Output Accuracy | ±1% at +25°C, ±1.5% over –40°C to +85°C; enables precise voltage margining for sensitive analog and digital subsystems. |
| PSRR | 75dB at 1kHz; suppresses switching noise from upstream DC-DC converters feeding noisy power domains. |
| Output Noise | 60µVrms (10Hz–100kHz); meets low-noise requirements for RF transceivers and high-resolution ADCs. |
| Dropout Voltage | 220mV max at 3.3V/300mA, 350mV max at 1.8V/300mA; sustains regulation under brown-out conditions in battery-powered systems. |
| Quiescent Current | 50µA per active channel (EN high, no load); extends battery life in always-on sensor or standby subsystems. |
| Enable Thresholds | EN low ≤0.5V, EN high ≥1.3V; compatible with 1.8V/3.3V GPIOs without level-shifting. |
Pinout & Package
AP7345D-3318RH4-7 is housed in an X2-DFN1612-8 package (1.6mm × 1.2mm, 0.4mm height) with exposed thermal pad. The compact footprint supports high-density PCB layouts in smartphones and wearables. Thermal pad must be connected to GND plane for optimal junction-to-board thermal resistance (θJB ≈ 45°C/W).
| 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 3.3V; requires local 1µF ceramic capacitor placed adjacent to pin for stability and transient response. |
| VOUT2 (Pin 3) | Channel 2 regulated output | Delivers fixed 1.8V; independent from VOUT1, enabling asynchronous power-up/down sequencing. |
| EN2 (Pin 5) | Channel 2 enable input | Active-high control; floating state prohibited-must be pulled to VIN2 or GND to avoid undefined operation. |
| VIN2 (Pin 6) | Channel 2 input supply | Accepts 1.7V–5.25V; decoupled by 1µF ceramic capacitor near pin to suppress input ripple and load-step-induced droop. |
| VIN1 (Pin 7) | Channel 1 input supply | Independent input rail allows mixed-supply architectures (e.g., 3.6V battery to 3.3V/1.8V rails). |
| EN1 (Pin 8) | Channel 1 enable input | Enables/disables 3.3V rail independently; supports dynamic power gating of peripheral subsystems. |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent LDOs | Two fully isolated regulators on one die-no cross-talk, no shared pass element, enabling asymmetric voltage and sequencing control. |
| Built-in output discharge | 30Ω internal NMOS switch discharges VOUT1/VOUT2 within microseconds upon EN deactivation-prevents back-powering and improves system reset integrity. |
| Ultra-low noise & high PSRR | 60µVrms noise + 75dB PSRR at 1kHz ensures clean supply for RF front-ends and precision analog circuits without external filtering. |
| Thermal shutdown with hysteresis | +150°C trip point with +20°C hysteresis prevents thermal oscillation during sustained overload or poor heatsinking. |
| Wide input range & low dropout | 1.7V–5.25V input supports single-cell Li-ion (2.7–4.2V) and USB-powered designs; sub-300mV dropout at full load maximizes usable battery voltage. |
Applications
| Smartphone Baseband | RF Transceiver Supply |
|---|---|
|
Use Scenario: Powering application processor I/O and memory interface rails in multi-core mobile SoCs. IC Role / Device Role / Timing Role: Dual-rail LDO providing tightly regulated 3.3V (I/O) and 1.8V (core logic) with independent enable for power-state transitions. Use Value: ±1% accuracy maintains signal integrity across high-speed interfaces; 60µVrms noise prevents jitter in DDR clock trees. |
Use Scenario: Biasing RF power amplifiers and low-noise amplifiers in 4G/5G front-end modules. IC Role / Device Role / Timing Role: Low-noise 3.3V supply for PA driver stage and 1.8V supply for LNA bias, both isolated from digital switching noise. Use Value: 75dB PSRR at 1kHz rejects noise from nearby DC-DC converters; fast load transient response (<40µs) handles burst-mode PA current demands. |
| Camera Module | Wireless Adapter |
|
Use Scenario: Supplying image sensor analog core (1.8V) and digital interface (3.3V) in compact camera modules. IC Role / Device Role / Timing Role: Dual-output LDO with independent EN pins enabling staggered power-up to avoid inrush current peaks during sensor initialization. Use Value: Built-in discharge clears residual charge on sensor analog nodes during power-down, preventing image artifacts on next startup. |
Use Scenario: Providing clean, sequenced power to Wi-Fi/BT combo chips in portable hotspots and IoT gateways. IC Role / Device Role / Timing Role: Regulating 3.3V for radio PHY and 1.8V for baseband MCU, with EN1/EN2 controlled by host processor for sleep/wake coordination. Use Value: 50µA quiescent current per active channel minimizes standby drain; thermal shutdown protects against enclosure overheating during prolonged transmit bursts. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-LDO applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Torex XC6216D3318MR-G | Same 3.3V/1.8V dual output, but only 200mA per channel; no built-in discharge; PSRR 65dB @1kHz. | Lacks output discharge and lower current rating limits use in high-transient RF loads. | Select when cost sensitivity outweighs need for 300mA capability and fast discharge. |
| Richtek RT9080L-3318GJ6F | 300mA dual LDO with 3.3V/1.8V outputs; higher quiescent current (120µA active); no thermal hysteresis spec. | Higher IQ reduces battery runtime in always-on sensors; missing thermal hysteresis increases risk of cycling under marginal cooling. | Prefer only if footprint compatibility with SOT-23-6 is required and thermal margin is guaranteed. |
Compared with XC6216D3318MR-G and RT9080L-3318GJ6F, AP7345D-3318RH4-7 uniquely combines 300mA per channel, integrated discharge, 75dB PSRR, and 50µA IQ in a 1.6mm×1.2mm DFN-enabling smaller, cooler, and longer-lasting dual-rail designs.
Availability
AP7345D-3318RH4-7 is available at Aetrix Electronics and suitable for smartphone baseband, RF transceiver, and camera module applications requiring stable component supply, tight voltage accuracy, and ultra-low noise performance.
Supply support for AP7345D-3318RH4-7 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 protection solutions for consumer, industrial, and communications markets.
The AP7345D belongs to Diodes' high-PSRR, low-noise LDO family designed specifically for noise-sensitive portable electronics where dual-rail sequencing, minimal board area, and battery efficiency are critical.
FAQ
What is the maximum allowable input voltage for AP7345D-3318RH4-7?
The absolute maximum input voltage is 6.0V, but the recommended operating range is 1.7V to 5.25V. 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. Operation above 5.25V is not characterized or guaranteed.
Can AP7345D-3318RH4-7 operate with only one channel enabled?
Yes-EN1 and EN2 are fully independent. Enabling only Channel 1 (EN1 = high, EN2 = low) delivers 3.3V while Channel 2 is fully shut down, drawing only 0.1–1.0µA standby current. This configuration is commonly used to power primary subsystems while keeping secondary rails inactive until needed.
Is an external capacitor required on the thermal pad?
No external capacitor is required on the thermal pad. Instead, the exposed pad must be soldered to a solid GND copper pour (minimum 25mm² recommended) to ensure effective heat dissipation and maintain junction temperature below +125°C at 300mA load. No electrical connection beyond GND is permitted.
Does AP7345D-3318RH4-7 support reverse current blocking?
No-the device does not integrate reverse current blocking. When input voltage drops below output voltage (e.g., during battery removal), current can flow backward from VOUT to VIN through the body diode of the NMOS pass transistor. External reverse-blocking diodes or ideal diode controllers are required in systems where backfeed must be prevented.
AP7345D-3318RH4-7 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):
- 3.3V, 1.8V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.29V @ 300mA, 0.39V @ 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-3318RH4-7 FAQ
1.How can I place an order for AP7345D-3318RH4-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP7345D-3318RH4-7 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-3318RH4-7 reliable?
The price and inventory of AP7345D-3318RH4-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP7345D-3318RH4-7 is usually 5 days.
3.What payment methods are accepted for AP7345D-3318RH4-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP7345D-3318RH4-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP7345D-3318RH4-7?
AP7345D-3318RH4-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP7345D-3318RH4-7 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-3318RH4-7?
For technical support, including AP7345D-3318RH4-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP7345D-3318RH4-7 requirements.
6.How does Aetrix verify that AP7345D-3318RH4-7 is sourced from the original manufacturer or authorized distributors?
All AP7345D-3318RH4-7 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-3318RH4-7 meets industry standards.
7.What is the process for return or replacement of AP7345D-3318RH4-7?
All AP7345D-3318RH4-7 units undergo pre-shipment inspection (PSI). If there is an issue with AP7345D-3318RH4-7, 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-3318RH4-7 part is unused and in its original packaging.
Return procedure for AP7345D-3318RH4-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AP7345D-3318RH4-7 Tags
-
MIC5504-1.8YM5-TR
Microchip Technology
-
MIC5504-3.3YM5-TR
Microchip Technology
-
MIC5365-3.0YC5-TR
Microchip Technology
-
MIC5365-1.8YC5-TR
Microchip Technology
-
MIC5365-2.5YC5-TR
Microchip Technology
-
MIC5365-3.3YC5-TR
Microchip Technology
-
MIC5365-3.3YD5-TR
Microchip Technology
-
MIC5317-3.3YM5-TR
Microchip Technology
-
TLV1117LV33DCYR
Texas Instruments
-
MIC5317-3.3YMT-TZ
Microchip Technology
-
MIC5528-3.3YMT-TR
Microchip Technology
-
TLV75801PDRVR
Texas Instruments
Tech Hub
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
LDO regulator guide covering low dropout voltage, power dissipation, thermal design, PSRR, output noise, capacitor stability, adjustable LDO circuits, LDO vs buck converter and datasheet selection chec…
Conditional Access Module guide covering CAM meaning, CI/CI+ interface, smart card authorization, DVB security workflow, TV and set-top box compatibility, internal electronics, ESD protection, connecto…
Guide to electronic component obsolescence covering EOL risk, PCN/PDN notices, last-time buy planning, replacement options, form-fit-function validation, counterfeit risk and BOM lifecycle management.
18650 battery guide covering lithium-ion cell basics, 3.6V/3.7V voltage, 4.2V charging, mAh and Wh capacity, protected cells, chargers, BMS, series-parallel packs, holders, welding and sourcing checks.…
Hall effect sensor guide covering working principle, linear and digital sensors, Arduino circuits, current sensing, speed detection, automotive applications, A3144 examples, signal filtering and datash…
