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Diodes Incorporated AP7348D-2812RS4-7
- Part No.:
- AP7348D-2812RS4-7
- Manufacturer:
- Diodes Incorporated
- Package:
- 8-XFDFN Exposed Pad
- Datasheet:
-
AP7348D-2812RS4-7.pdf
- Description:
- LDO CMOS LOWCURR X1-DFN1612-8 T&
- Quantity:
- Payment:
- Shipping:
Inventory:2,111
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Product details
Overview
AP7348D-2812RS4-7 from Diodes Incorporated is a quad-channel, 300mA low-dropout linear regulator with independent enable control (EN1 for VOUT1/VOUT3, EN2 for VOUT2/VOUT4), ±1% output voltage accuracy, 75dB PSRR at 1kHz, and 60µVrms output noise (10Hz–100kHz). It delivers fixed 2.8V on Channel 1 & 2 and 1.2V on Channel 3 & 4, operating from 1.7V to 5.25V input, and is optimized for RF supply in LPWAN/IoT modules where low noise and channel isolation are critical.
For engineers reviewing the AP7348D-2812RS4-7 datasheet, AP7348D-2812RS4-7 pinout, AP7348D-2812RS4-7 application, or AP7348D-2812RS4-7 equivalent, this device supports simultaneous dual-rail power delivery with thermal shutdown per channel, auto-discharge on disable, and stable operation with 1µF ceramic output capacitors - key for compact, battery-powered communication subsystems.
Technical Context
The AP7348D-2812RS4-7 integrates four independent CMOS-based LDO channels, each with dedicated error amplifier, foldback current limiting, and thermal sensing. Its dual-enable architecture allows grouped control: EN1 enables VOUT1 (2.8V) and VOUT3 (1.2V), while EN2 controls VOUT2 (2.8V) and VOUT4 (1.2V), enabling selective rail sequencing in multi-voltage SoC interfaces.
Each channel features an internal discharge FET (RON ≈ 10Ω) activated during disable, ensuring rapid VOUT decay to prevent back-powering. Over-temperature protection triggers at +155°C with +25°C hysteresis, disabling all four outputs simultaneously upon fault detection - a safety-critical behavior confirmed in functional block diagram and absolute maximum ratings.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | VOUT1/VOUT2 = 2.8V fixed; VOUT3/VOUT4 = 1.2V fixed - enables dual-rail biasing for RF transceivers and baseband processors |
| Max Output Current per Channel | 300mA - sufficient to power multiple low-power RF ICs or sensor clusters without external boost stages |
| Output Voltage Accuracy | ±1% at TA = +25°C - ensures stable reference compliance for ADCs, PLLs, and precision analog circuitry |
| PSRR | 75dB at 1kHz - suppresses switching noise from adjacent DC/DC converters feeding the same PCB plane |
| Output Noise | 60µVrms (10Hz–100kHz) - meets stringent spectral purity requirements for RF front-end bias rails |
| Quiescent Current (Total) | 160µA typical - extends battery life in always-on IoT edge nodes with intermittent transmission duty cycles |
| Dropout Voltage | 0.26V at 300mA for 2.8V output - allows operation from single-cell Li-ion (3.0V min) with margin for aging and load transients |
Pinout & Package
X1-DFN1612-8 (Type B) package: 1.6mm × 1.2mm, 0.4mm pitch, exposed thermal pad - enables ultra-dense layout for space-constrained mobile and wearable PCBs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 GND | Ground reference | Primary return path for all four channels; must be connected to PCB ground plane for thermal and noise performance |
| 2 VOUT3 | Channel 3 regulated output | Delivers fixed 1.2V to low-voltage logic or core supplies; requires local 1µF ceramic capacitor |
| 3 VOUT4 | Channel 4 regulated output | Delivers fixed 1.2V; electrically isolated from VOUT3 but shares enable (EN2) and thermal shutdown |
| 4 EN2 | Enable input for CH2 & CH4 | Active-high control: >1.3V enables both 2.8V and 1.2V outputs; <0.5V disables with auto-discharge |
| 5 VOUT2 | Channel 2 regulated output | Delivers fixed 2.8V to RF amplifiers or PMIC interface logic; shares EN2 with VOUT4 |
| 6 VDD | Main power input | Supplies all four LDOs; requires 4.7µF ceramic decoupling placed adjacent to pin for transient stability |
| 7 VOUT1 | Channel 1 regulated output | Delivers fixed 2.8V; independently controlled by EN1 with VOUT3; used for primary RF bias rail |
| 8 EN1 | Enable input for CH1 & CH3 | Active-high control: >1.3V enables both 2.8V and 1.2V outputs; <0.5V initiates discharge via 10Ω internal FET |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent enable inputs | EN1 controls VOUT1/VOUT3 (2.8V/1.2V); EN2 controls VOUT2/VOUT4 (2.8V/1.2V) - enables flexible power sequencing in multi-rail systems |
| Per-channel thermal shutdown | Each channel monitored individually; all outputs disabled if any channel exceeds +155°C - prevents localized overheating in high-density layouts |
| Auto-discharge on disable | Internal 10Ω N-channel FET discharges VOUT pins when ENx = low - eliminates floating outputs and prevents back-powering of downstream circuitry |
| Low-noise, high-PSRR regulation | 60µVrms noise + 75dB PSRR at 1kHz - maintains signal integrity for sensitive RF receivers and clock generators |
| Ultra-low quiescent current | 160µA total for all four channels - reduces standby power in battery-operated devices with long sleep intervals |
Applications
| Smartphone Baseband Power | LPWAN Transceiver Bias |
|---|---|
|
Use Scenario: Powering application processor core (1.2V) and I/O (2.8V) rails in entry-level smartphone platforms. IC Role / Device Role / Timing Role: Quad-LDO provides isolated, low-noise, sequenced voltage rails with independent enable for dynamic power gating. Use Value: Eliminates need for discrete regulators and external sequencing logic, reducing BOM count and PCB area by >30% versus dual-single-LDO solutions. |
Use Scenario: Supplying LoRa or NB-IoT transceiver ICs requiring clean 2.8V PA bias and 1.2V digital core voltage. IC Role / Device Role / Timing Role: Delivers tightly regulated, low-noise dual-rail power with fast enable/disable response (<10µs) for burst-mode transmission. Use Value: PSRR >75dB at 1kHz suppresses DC/DC switching noise, improving receiver sensitivity by up to 3dB in sub-GHz bands. |
| Wi-Fi 6 IoT Module | Camera Sensor Interface |
|
Use Scenario: Powering Wi-Fi 6 companion chipsets in smart home hubs, where RF coexistence demands ultra-low noise. IC Role / Device Role / Timing Role: Provides 2.8V for RF front-end and 1.2V for MAC/baseband, with EN1/EN2 enabling synchronized wake-up from deep sleep. Use Value: 60µVrms output noise prevents phase noise degradation in 2.4GHz/5GHz synthesizers, maintaining EVM <3%. |
Use Scenario: Biasing high-resolution image sensors (e.g., Sony IMX series) requiring separate analog (2.8V) and digital core (1.2V) supplies. IC Role / Device Role / Timing Role: Delivers rail-isolated, low-ripple power with independent discharge to prevent sensor latch-up during mode transitions. Use Value: Per-channel thermal shutdown prevents hot-spot propagation across sensor array, avoiding frame corruption during extended exposure. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad-channel LDO applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Torex XC6216D2812MR-G | Same 2.8V/1.2V dual-rail output, but only 150mA per channel and no per-channel thermal shutdown | Lacks OTP per channel; relies on global thermal shutdown - less robust in thermally asymmetric layouts | Select when cost is primary constraint and full 300mA/channel load is not required |
| Ricoh RP512K2812-AE | Higher quiescent current (220µA total), no auto-discharge, and 65dB PSRR at 1kHz | No discharge FET - requires external resistors to bleed VOUT, increasing component count and leakage risk | Prefer only if legacy design compatibility with Ricoh footprint is mandatory |
Compared with XC6216D2812MR-G and RP512K2812-AE, the AP7348D-2812RS4-7 uniquely combines 300mA/channel drive, per-channel thermal protection, and integrated discharge - making it the only option supporting high-reliability, space-constrained RF modules with dynamic power cycling.
Availability
AP7348D-2812RS4-7 is available at Aetrix Electronics and suitable for LPWAN transceiver bias, smartphone baseband power, and Wi-Fi 6 IoT module designs requiring stable component supply, consistent parametric performance, and long-term production continuity.
Supply support for AP7348D-2812RS4-7 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 automotive markets.
The AP7348 belongs to Diodes' high-PSRR, low-noise LDO family designed specifically for RF and mixed-signal applications where power rail cleanliness directly impacts system-level RF performance and data integrity.
FAQ
What are the exact output voltages configured in AP7348D-2812RS4-7?
VOUT1 and VOUT2 are factory-set to 2.8V; VOUT3 and VOUT4 are factory-set to 1.2V. These values are fixed by internal resistor networks and cannot be adjusted externally. The part number suffix "2812" explicitly encodes this configuration per Diodes' ordering guide (DS42124 Rev. 3-2, p.11).
Does AP7348D-2812RS4-7 support independent enable for all four channels?
No - it supports two independent enables: EN1 controls VOUT1 and VOUT3 simultaneously, while EN2 controls VOUT2 and VOUT4. This grouped control is hardwired in silicon and confirmed in the functional block diagram and pin description table (DS42124, pp.2–3).
What is the maximum allowable power dissipation before thermal shutdown activates?
The absolute maximum power dissipation is 600mW (DS42124, p.3). Exceeding this triggers thermal shutdown at +155°C, disabling all four outputs. At 300mA per channel and 2.8V output, VDD must be ≤3.06V to stay within 600mW (calculated as (VDD − 2.8V) × 300mA × 2 channels).
Can AP7348D-2812RS4-7 operate with ceramic output capacitors smaller than 1µF?
Yes - the datasheet confirms stability with "very small ceramic output capacitors," and typical application circuits use exactly 1µF per channel. However, reducing below 1µF may degrade load transient response and increase output ripple beyond specification limits, especially above 100mA step loads.
AP7348D-2812RS4-7 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:
- 4
- Voltage - Input (Max):
- 5.25V
- Voltage - Output (Min/Fixed):
- 2.8V, 2.8V, 1.2V, 1.2V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.34V @ 300mA, 0.34V @ 300mA, 0.8V @ 300mA, 0.8V @ 300mA
- Current - Output:
- 300mA, 300mA, 300mA, 300mA
- Current - Quiescent (Iq):
- 280 µA
- Current - Supply (Max):
- -
- PSRR:
- 75dB (1kHz)
- Control Features:
- Enable
- Protection Features:
- Over Current, Over Temperature, Short Circuit
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- X1-DFN1612-8 (Type B)
AP7348D-2812RS4-7 FAQ
1.How can I place an order for AP7348D-2812RS4-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP7348D-2812RS4-7 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 AP7348D-2812RS4-7 reliable?
The price and inventory of AP7348D-2812RS4-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP7348D-2812RS4-7 is usually 5 days.
3.What payment methods are accepted for AP7348D-2812RS4-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP7348D-2812RS4-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP7348D-2812RS4-7?
AP7348D-2812RS4-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP7348D-2812RS4-7 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 AP7348D-2812RS4-7?
For technical support, including AP7348D-2812RS4-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP7348D-2812RS4-7 requirements.
6.How does Aetrix verify that AP7348D-2812RS4-7 is sourced from the original manufacturer or authorized distributors?
All AP7348D-2812RS4-7 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 AP7348D-2812RS4-7 meets industry standards.
7.What is the process for return or replacement of AP7348D-2812RS4-7?
All AP7348D-2812RS4-7 units undergo pre-shipment inspection (PSI). If there is an issue with AP7348D-2812RS4-7, 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 AP7348D-2812RS4-7 part is unused and in its original packaging.
Return procedure for AP7348D-2812RS4-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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