My Inquiry
My Account
Diodes Incorporated AP7343DQ-29W5-7
- Part No.:
- AP7343DQ-29W5-7
- Manufacturer:
- Diodes Incorporated
- Package:
- SC-74A, SOT-753
- Datasheet:
-
AP7343DQ-29W5-7.pdf
- Description:
- IC REG LINEAR 2.9V 300MA SOT25
- Quantity:
- Payment:
- Shipping:
Inventory:2,850
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
AP7343DQ-29W5-7 from Diodes Incorporated is an automotive-grade 300mA low-dropout linear regulator with fixed 2.9V output, ±1% accuracy, 75dB PSRR at 1kHz, 60µVrms output noise (10Hz–100kHz), and 35µA quiescent current - designed for noise-sensitive RF and camera power rails in ADAS and infotainment systems.
For engineers reviewing the AP7343DQ-29W5-7 datasheet, AP7343DQ-29W5-7 pinout, AP7343DQ-29W5-7 application, or AP7343DQ-29W5-7 equivalent, key selection criteria include AEC-Q100 Grade 1 qualification, SOT25 package thermal performance (θJA = 179°C/W), enable-controlled shutdown (ISTANDBY = 0.01µA), and built-in output discharge functionality.
Technical Context
The AP7343DQ-29W5-7 integrates a CMOS-based error amplifier, precision voltage reference, current-limit circuit, and thermal shutdown protection. Its enable input supports active-high logic control with VEN(H) ≥ 1.3V and VEN(L) ≤ 0.5V, enabling precise sequencing in multi-rail automotive systems.
It features internal auto-discharge via a 30Ω N-channel MOSFET when disabled, ensuring rapid VOUT decay to prevent latch-up in downstream logic. The device operates across –40°C to +125°C ambient and supports input voltages from 1.7V to 5.25V with dropout as low as 0.22V at 300mA for VOUT = 2.9V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 2.9V ±1% - ensures stable core supply for 2.8V–3.0V tolerant RF ICs and image sensors. |
| Max Output Current | 300mA continuous - sufficient for powering single-channel camera ISPs or low-power transceivers. |
| PSRR | 75dB at 1kHz - suppresses switching noise from adjacent DC/DC converters in dense automotive PCBs. |
| Output Noise | 60µVrms (10Hz–100kHz) - minimizes phase noise in VCOs and jitter in high-speed serial links. |
| Quiescent Current | 35µA typical - enables always-on monitoring circuits without compromising battery drain in sleep mode. |
| Dropout Voltage | 0.22V at 300mA (VOUT = 2.9V) - allows operation from 3.12V input, compatible with post-boost or buck-boost rails. |
| Enable Threshold | VEN(H) = 1.3V min, VEN(L) = 0.5V max - interfaces directly with 1.8V/3.3V microcontroller GPIOs without level shifters. |
| AEC-Q100 Grade | Grade 1 (–40°C to +125°C) - qualified for engine bay, front-end ADAS, and center-stack infotainment locations. |
Pinout & Package
AP7343DQ-29W5-7 is packaged in SOT25 (5-pin, 2.9mm × 2.8mm × 1.3mm), optimized for thermal dissipation in space-constrained automotive modules. The exposed pad is not electrically connected but must be tied to GND via large copper area for thermal management.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VIN | Main power input (1.7V–5.25V); requires ≥0.47µF ceramic decoupling capacitor placed adjacent to pin. |
| 2 | EN | Active-high enable; floating prohibited - tie to VIN if always-on operation is required. |
| 3 | GND | Analog/digital ground reference; must connect to low-impedance PCB ground plane. |
| 4 | VOUT | Regulated 2.9V output; requires ≥1µF ceramic output capacitor near load for transient stability. |
| 5 | NC | No-connect terminal; recommended to tie to GND for improved thermal conduction and EMI shielding. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated Output Discharge | 30Ω N-channel FET discharges VOUT to <100mV within 100µs after EN deactivation - prevents back-powering of upstream logic. |
| Ultra-Low Noise Regulation | 60µVrms broadband noise enables clean power for RF front-ends and high-resolution ADCs without external filtering. |
| High PSRR at Low Frequencies | 75dB rejection at 1kHz mitigates ripple from 1MHz–2MHz buck converters feeding shared input rails. |
| Automotive Qualification | AEC-Q100 Grade 1, PPAP-capable, IATF 16949 manufacturing - meets OEM requirements for functional safety-critical subsystems. |
| Wide Input Range | 1.7V–5.25V operation supports direct connection to 3.3V or 5V system rails, including partially discharged batteries. |
| Thermal Protection | 150°C junction shutdown with 20°C hysteresis prevents damage during sustained overload or poor heatsinking. |
Applications
| Infotainment Power Supply | Automotive RF Supply |
|---|---|
|
Use Scenario: Powering audio DSPs and display controllers in head-unit systems with shared 5V rail. IC Role / Device Role / Timing Role: Primary LDO delivering clean 2.9V to noise-sensitive analog sections and PLLs. Use Value: 75dB PSRR rejects switching noise from adjacent buck converters, reducing audible artifacts and display flicker. |
Use Scenario: Biasing VCOs and LNAs in cellular/V2X telematics modules operating near 4G/5G bands. IC Role / Device Role / Timing Role: Low-noise local regulation for RF signal chain components requiring sub-100µVrms supply noise. Use Value: 60µVrms output noise maintains EVM performance and prevents phase noise degradation in transmit paths. |
| Camera Module Power | ADAS Point-of-Load |
|
Use Scenario: Supplying image signal processors (ISPs) and CIS sensors in rear-view and surround-view cameras. IC Role / Device Role / Timing Role: Fixed 2.9V LDO with fast load transient response for dynamic pixel readout current demands. Use Value: <100µs recovery from 1mA↔300mA load steps ensures no frame corruption or rolling shutter artifacts. |
Use Scenario: Providing regulated 2.9V to radar SoCs and sensor fusion MCUs in forward collision warning systems. IC Role / Device Role / Timing Role: AEC-Q100-compliant POL regulator with enable control for power domain sequencing. Use Value: Built-in discharge eliminates hold-up voltage that could cause MCU brown-out during controlled shutdown sequences. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AP7343Q-29W5-7 | No integrated output discharge; 0.01µA standby current vs. 35µA active quiescent current. | Suitable where fast VOUT decay is unnecessary and lowest possible shutdown current is critical. | Select when discharge is not required and system-level discharge is handled externally. |
| TLD1121EPV50 | 500mA rated, higher dropout (0.3V @ 300mA), no enable pin, AEC-Q100 Grade 0 (–40°C to +150°C). | Used in high-current, high-temp zones like engine control; lacks sequencing control and low-noise optimization. | Choose only for higher current demand and extreme temperature environments where PSRR/noise are secondary. |
Compared with AP7343Q-29W5-7, the DQ variant adds discharge capability at the cost of slightly higher quiescent current; versus TLD1121EPV50, it trades current capacity and junction temperature margin for superior noise/PSRR performance and enable control - making it optimal for signal integrity–critical ADAS sub-systems.
Availability
AP7343DQ-29W5-7 is available at Aetrix Electronics and suitable for automotive infotainment, ADAS camera power, RF module biasing, and wireless communication subsystems requiring stable component supply with full AEC-Q100 traceability.
Supply support for AP7343DQ-29W5-7 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 semiconductor company specializing in discrete, analog, and mixed-signal solutions for automotive, industrial, and consumer markets, with ISO/TS 16949-certified manufacturing.
The AP7343Q/DQ series targets automotive power management, delivering high-PSRR, low-noise LDOs for noise-sensitive domains including radar, vision, and connectivity systems where reliability and signal integrity are paramount.
FAQ
What is the purpose of the NC pin on AP7343DQ-29W5-7?
Pin 5 is a no-connect terminal with no internal bond wire. It is recommended to connect this pin to GND on the PCB to maximize thermal dissipation through increased copper area and improve EMI shielding - but it must not be used as the primary ground return path.
Does AP7343DQ-29W5-7 require an external discharge resistor?
No. Unlike non-DQ variants, AP7343DQ-29W5-7 integrates a 30Ω N-channel MOSFET between VOUT and GND that activates automatically when EN is low, discharging the output capacitance without external components - verified per datasheet Note 11 and Typical Characteristics on page 10.
Can AP7343DQ-29W5-7 operate with a 1.8V input supply?
No. The minimum input voltage is 1.7V, but dropout voltage at 300mA for 2.9V output is 0.22V (typical), requiring ≥3.12V input to maintain regulation. At 1.8V input, the device enters dropout and cannot sustain 2.9V output - confirmed by Recommended Operating Conditions and Dropout Voltage table on page 3.
How does the thermal performance of SOT25 compare to W-DFN2020-6 packages?
SOT25 has θJA = 179°C/W, while W-DFN2020-6 (Type UXD) achieves 53.3°C/W - a 3.4× improvement. This means the SOT25 version dissipates heat less efficiently and requires larger copper pour or lower ambient temperatures to stay within the 150°C junction limit under 300mA load, as specified in Absolute Maximum Ratings.
AP7343DQ-29W5-7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- SC-74A, SOT-753
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Output Configuration:
- Positive
- Output Type:
- Fixed
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 5.25V
- Voltage - Output (Min/Fixed):
- 2.9V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.32V @ 300mA
- Current - Output:
- 300mA
- Current - Quiescent (Iq):
- 60 µA
- Current - Supply (Max):
- -
- PSRR:
- 75dB (1kHz)
- Control Features:
- Enable
- Protection Features:
- Over Current, Over Temperature, Short Circuit
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-25
AP7343DQ-29W5-7 FAQ
1.How can I place an order for AP7343DQ-29W5-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP7343DQ-29W5-7 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 AP7343DQ-29W5-7 reliable?
The price and inventory of AP7343DQ-29W5-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP7343DQ-29W5-7 is usually 5 days.
3.What payment methods are accepted for AP7343DQ-29W5-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP7343DQ-29W5-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP7343DQ-29W5-7?
AP7343DQ-29W5-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP7343DQ-29W5-7 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 AP7343DQ-29W5-7?
For technical support, including AP7343DQ-29W5-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP7343DQ-29W5-7 requirements.
6.How does Aetrix verify that AP7343DQ-29W5-7 is sourced from the original manufacturer or authorized distributors?
All AP7343DQ-29W5-7 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 AP7343DQ-29W5-7 meets industry standards.
7.What is the process for return or replacement of AP7343DQ-29W5-7?
All AP7343DQ-29W5-7 units undergo pre-shipment inspection (PSI). If there is an issue with AP7343DQ-29W5-7, 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 AP7343DQ-29W5-7 part is unused and in its original packaging.
Return procedure for AP7343DQ-29W5-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AP7343DQ-29W5-7 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
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
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.…
