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Diodes Incorporated AP7345D-3612RH4-7
- Part No.:
- AP7345D-3612RH4-7
- Manufacturer:
- Diodes Incorporated
- Package:
- 8-XFDFN Exposed Pad
- Datasheet:
-
AP7345D-3612RH4-7.pdf
- Description:
- IC REG LIN 3.6V/1.2V 300MA 8DFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,886
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Product details
Overview
AP7345D-3612RH4-7 from Diodes Incorporated is a dual-channel, CMOS-based low-dropout linear regulator with independent 3.6V and 1.2V fixed outputs, 300mA per channel, ±1% output voltage accuracy over temperature, 75dB PSRR at 1kHz, and 60µVrms output noise (10Hz–100kHz). It operates from 1.7V to 5.25V input and targets power-sensitive RF and digital core supplies in portable communication devices.
For engineers reviewing the AP7345D-3612RH4-7 datasheet, AP7345D-3612RH4-7 pinout, AP7345D-3612RH4-7 application, or AP7345D-3612RH4-7 equivalent, key selection criteria include dual-rail sequencing capability, ultra-low quiescent current (50µA per active channel), thermal shutdown at +150°C, and X2-DFN1612-8 package compatibility with high-density PCB layouts.
Technical Context
The AP7345D-3612RH4-7 integrates two independent LDO regulators on a single die, each with dedicated enable (EN1/EN2), input (VIN1/VIN2), output (VOUT1/VOUT2), and shared ground pins. Each channel features a precision voltage reference, error amplifier, current-limit circuit, and built-in auto-discharge function via 30Ω N-channel MOSFETs.
It employs a CMOS process for low dropout (0.22V typical at 3.6V/300mA) and low quiescent current, with separate line/load transient response optimization-demonstrated by <20µs recovery time under 50mA–300mA load steps and stable operation with 1µF ceramic output capacitors.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Channel 1: 3.6V fixed; Channel 2: 1.2V fixed - eliminates external resistor networks and ensures rail-specific compliance for RF bias and logic core supplies. |
| Output Accuracy | ±1% at +25°C, ±1.5% over –40°C to +85°C - enables reliable margining for 3.3V-tolerant I/O and 1.2V FPGA core domains without post-production calibration. |
| PSRR | 75dB at 1kHz - suppresses switching noise from adjacent DC-DC converters feeding noisy system rails like USB or PMIC outputs. |
| Output Noise | 60µVrms (10Hz–100kHz) - meets stringent analog/RF supply requirements for low-jitter clock generation and high-SNR ADC front-ends. |
| Quiescent Current | 50µA per active channel - extends battery life in always-on sensor nodes and standby modes of mobile devices. |
| Dropout Voltage | 0.22V max at 3.6V/300mA; 0.46V max at 1.2V/300mA - supports operation from single-cell Li-ion (2.8V–4.2V) and coin-cell sources down to 1.7V input. |
| Thermal Shutdown | +150°C threshold with +20°C hysteresis - protects against sustained overload in compact enclosures without external thermal monitoring. |
Pinout & Package
The AP7345D-3612RH4-7 is housed in an X2-DFN1612-8 package (1.6mm × 1.2mm, 0.4mm height) with exposed thermal pad for enhanced heat dissipation. Recommended PCB layout uses large copper area connected to GND under the thermal pad.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND (Pins 1, 4) | Common ground reference | Low-impedance return path for both regulators; must be tied to system ground plane to minimize noise coupling and ensure stability. |
| VOUT1 (Pin 2) | Channel 1 regulated output | Delivers fixed 3.6V at up to 300mA; requires local 1µF ceramic capacitor to GND for transient response and EMI suppression. |
| VOUT2 (Pin 3) | Channel 2 regulated output | Delivers fixed 1.2V at up to 300mA; decoupling capacitor placement critical for low-noise digital core supply integrity. |
| EN2 (Pin 5) | Channel 2 enable control | Active-high logic input (1.3V–5.25V); floating state prohibited - tie to VIN2 or GND for default ON/OFF configuration. |
| VIN2 (Pin 6) | Channel 2 input supply | Accepts 1.7V–5.25V; requires 1µF ceramic input capacitor close to pin to prevent rail collapse during load transients. |
| VIN1 (Pin 7) | Channel 1 input supply | Independent input domain allows separate sourcing (e.g., main PMIC vs. battery backup) for fault isolation and power domain partitioning. |
| EN1 (Pin 8) | Channel 1 enable control | Independent sequencing control enables staggered power-up of RF and baseband subsystems to avoid inrush current peaks. |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent enable inputs | EN1 and EN2 allow asynchronous power sequencing - essential for meeting boot-order requirements in multi-rail SoC platforms. |
| Built-in auto-discharge | 30Ω internal N-MOSFET per output rapidly discharges VOUT when disabled - prevents floating voltages that could damage downstream logic during hot-swap or reset. |
| Ultra-low noise & high PSRR | 60µVrms noise + 75dB PSRR enables direct use in sensitive RF front-ends without additional LC filtering stages. |
| Wide input range & low dropout | 1.7V–5.25V input with 0.22V dropout at 3.6V/300mA supports single-cell Li-ion, USB VBUS, and legacy 3.3V/5V rails interchangeably. |
| Thermal protection with hysteresis | +150°C shutdown with +20°C hysteresis prevents thermal cycling instability in thermally constrained handheld enclosures. |
Applications
| Smartphone Baseband Power | RF Transceiver Bias Supply |
|---|---|
|
Use Scenario: Dual-rail power delivery to application processor (1.2V core) and cellular modem interface (3.6V I/O). IC Role / Device Role / Timing Role: Primary LDO providing isolated, low-noise, sequenced voltage domains for heterogeneous SoC subsystems. Use Value: Eliminates need for two discrete LDOs and reduces BOM count while maintaining independent enable control for dynamic power gating. |
Use Scenario: Clean bias supply for LTE/5G power amplifiers and low-noise amplifiers requiring minimal phase noise contribution. IC Role / Device Role / Timing Role: Low-noise, high-PSRR voltage source stabilizing RF signal chain performance across frequency bands. Use Value: 60µVrms noise and 75dB PSRR directly improve EVM and ACLR metrics without external filtering components. |
| Portable Camera Module | Wireless Adapter Core Logic |
|
Use Scenario: Simultaneous powering of image sensor analog front-end (3.6V AVDD) and digital controller (1.2V DVDD). IC Role / Device Role / Timing Role: Dual-output regulator delivering matched load transient response for synchronized sensor readout and processing. Use Value: Shared ground and compact DFN footprint minimize board space while maintaining >20µs transient recovery for burst-mode imaging. |
Use Scenario: Power management for Wi-Fi/BT combo chips where 3.6V powers RF sections and 1.2V supplies ARM Cortex-M cores. IC Role / Device Role / Timing Role: Integrated dual-LDO enabling rapid wake-from-sleep transitions via independent EN pin control. Use Value: 50µA quiescent current per active channel extends battery runtime in IoT edge devices with intermittent connectivity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-output LDO applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS7A20263DQNR | Single-channel 2.6V/300mA LDO; no second output or independent enable - requires external 1.2V regulator. | Lacks dual-rail integration; suitable only when 1.2V rail is already available elsewhere in design. | Select if system already provides 1.2V and only needs supplemental 2.6V rail with lower noise (4.5µVrms). |
| MCP1826S-3302E/DB | Fixed 3.3V/300mA dual-output LDO with 1.8V second output - no 3.6V/1.2V combination; higher quiescent current (120µA). | Cannot replace AP7345D-3612RH4-7's exact voltage pairing; limited to designs accepting 3.3V/1.8V instead of 3.6V/1.2V. | Choose only if voltage tolerance allows substitution and thermal derating is acceptable above 85°C ambient. |
Compared with TPS7A20263DQNR and MCP1826S-3302E/DB, the AP7345D-3612RH4-7 uniquely delivers the precise 3.6V/1.2V rail pair with independent enables, lowest noise among dual-output LDOs in its class, and smallest footprint - making it irreplaceable for space-constrained, multi-rail portable RF systems.
Availability
AP7345D-3612RH4-7 is available at Aetrix Electronics and suitable for smartphone baseband power, RF transceiver bias supply, and portable camera module applications requiring stable component supply, consistent parametric performance, and long-term production continuity.
Supply support for AP7345D-3612RH4-7 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 battery-powered portable electronics where rail integrity, size, and efficiency are critical - not general-purpose regulation.
FAQ
What is the maximum allowable input voltage for AP7345D-3612RH4-7?
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 even at light loads due to excessive power dissipation in the pass elements.
Can EN1 and EN2 be tied together for simultaneous control?
Yes - EN1 and EN2 can be connected to a common enable signal, but doing so forfeits independent sequencing capability. If used jointly, ensure the driving source meets both pins' input thresholds (VIH ≥ 1.3V, VIL ≤ 0.5V) and accounts for combined input leakage (<2.0µA total).
Is external compensation required for stability with ceramic output capacitors?
No - the AP7345D-3612RH4-7 is internally compensated and stable with 1µF ceramic capacitors (X5R/X7R) having ESR <10mΩ. Larger capacitance improves transient response but does not affect loop stability; avoid tantalum or aluminum electrolytics unless ESR is tightly controlled.
Does the thermal pad require electrical connection to GND?
The thermal pad should be connected to GND for optimal thermal performance and EMI reduction, but it must not serve as the sole GND electrode - dedicated GND pins (1 and 4) must carry return current. PCB layout must maintain ≥0.2mm soldermask opening around the pad for full thermal conduction.
AP7345D-3612RH4-7 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):
- 3.6V, 1.2V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.29V @ 300mA, 0.7V @ 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-3612RH4-7 FAQ
1.How can I place an order for AP7345D-3612RH4-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP7345D-3612RH4-7 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-3612RH4-7 reliable?
The price and inventory of AP7345D-3612RH4-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP7345D-3612RH4-7 is usually 5 days.
3.What payment methods are accepted for AP7345D-3612RH4-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP7345D-3612RH4-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP7345D-3612RH4-7?
AP7345D-3612RH4-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP7345D-3612RH4-7 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-3612RH4-7?
For technical support, including AP7345D-3612RH4-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP7345D-3612RH4-7 requirements.
6.How does Aetrix verify that AP7345D-3612RH4-7 is sourced from the original manufacturer or authorized distributors?
All AP7345D-3612RH4-7 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-3612RH4-7 meets industry standards.
7.What is the process for return or replacement of AP7345D-3612RH4-7?
All AP7345D-3612RH4-7 units undergo pre-shipment inspection (PSI). If there is an issue with AP7345D-3612RH4-7, 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-3612RH4-7 part is unused and in its original packaging.
Return procedure for AP7345D-3612RH4-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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