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Diodes Incorporated AP7343-10FS4-7B
- Part No.:
- AP7343-10FS4-7B
- Manufacturer:
- Diodes Incorporated
- Package:
- 4-XDFN Exposed Pad
- Datasheet:
-
AP7343-10FS4-7B.pdf
- Description:
- IC REG LINEAR 1V 300MA 4DFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,243
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Product details
Overview
AP7343-10FS4-7B from Diodes Incorporated is a 300mA, 1.0V fixed-output low-dropout linear regulator with ±1% output voltage accuracy, 75dB PSRR at 1kHz, and 60µVrms output noise (10Hz–100kHz). Built on CMOS process, it features enable control, thermal shutdown, and short-circuit protection-designed for powering RF circuitry and core logic rails in space-constrained portable electronics.
For engineers reviewing the AP7343-10FS4-7B datasheet, AP7343-10FS4-7B pinout, AP7343-10FS4-7B application, or AP7343-10FS4-7B equivalent, key selection criteria include its 1.7V–5.25V input range, 35µA quiescent current, X2-DFN1010-4 (Type B) package footprint, and guaranteed 300mA output under low dropout conditions.
Technical Context
The AP7343-10FS4-7B integrates a precision voltage reference, error amplifier, current-limit circuit, and CMOS pass transistor-enabling stable regulation with fast line/load transient response. Its architecture supports direct enable control without external pull-ups, with EN threshold defined at 0–0.5V (low) and 1.3–5.25V (high).
Thermal protection activates at +150°C with +20°C hysteresis, and short-circuit current is clamped to ~55mA. The device operates across –40°C to +85°C ambient and delivers 1.0V output with ±30ppm/°C temperature coefficient and <0.31V dropout at 300mA (SOT25) or <0.29V (X2-DFN1010-4).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.0V ±1% at +25°C; maintains regulation down to 1.7V input |
| Max Output Current | 300mA continuous; fold-back short-circuit limit ~55mA |
| PSRR | 75dB at 1kHz - suppresses switching noise from upstream DC/DC converters |
| Output Noise | 60µVrms (10Hz–100kHz) - suitable for noise-sensitive RF and ADC supplies |
| Quiescent Current | 35µA typical - enables >1-year battery life in always-on sensor nodes |
| Dropout Voltage | 0.22V max at 300mA (VOUT = 1.0V, X2-DFN1010-4) - supports operation near battery end-of-life |
| Enable Threshold | VEN(H) ≥ 1.3V, VEN(L) ≤ 0.5V - compatible with 1.8V/3.3V GPIO without level-shifting |
Pinout & Package
X2-DFN1010-4 (Type B) package: 1.0mm × 1.0mm, 0.4mm pitch, exposed thermal pad (EP). Optimized for minimal PCB area and high thermal efficiency (RθJA = 237°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| PIN1 (VOUT) | Regulated power output | Delivers 1.0V ±1%; requires local 1µF ceramic capacitor for stability |
| PIN2 (GND) | Analog/digital ground reference | Must connect to low-impedance ground plane; ties EP for thermal enhancement |
| PIN3 (EN) | Active-high enable input | Drives regulator ON/OFF; must not float; 1.0µA max leakage ensures low standby drain |
| PIN4 (VIN) | Unregulated input supply | Accepts 1.7V–5.25V; requires 0.47µF ceramic decoupling placed adjacent to pin |
| EP (Exposed Pad) | Thermal dissipation path | Not electrically connected; soldered to large copper pour tied to GND for RθJB = 85.7°C/W |
Key Features
| Feature | Design Value |
|---|---|
| High PSRR | 75dB @ 1kHz enables clean power delivery in noisy PMIC-supplied systems |
| Ultra-low noise | 60µVrms output noise avoids degradation of RF receiver sensitivity or ADC SNR |
| Low quiescent current | 35µA IQ extends battery runtime in always-on IoT edge nodes |
| Thermal shutdown | +150°C trip with +20°C hysteresis prevents damage during sustained overload or poor heatsinking |
| Small-footprint packaging | X2-DFN1010-4 (1.0mm × 1.0mm) reduces PCB area by >60% vs. SOT25 for high-density layouts |
Applications
| RF Power Amplifier Bias | Mobile Camera Sensor Core Supply |
|---|---|
|
Use Scenario: Providing stable 1.0V bias to GaAs pHEMT power amplifiers in 4G/5G front-end modules. IC Role / Device Role / Timing Role: Low-noise LDO delivering clean, ripple-free VPA rail independent of noisy system PMIC outputs. Use Value: 60µVrms noise and 75dB PSRR prevent AM-to-PM distortion and EVM degradation in transmit paths. |
Use Scenario: Powering image signal processor (ISP) cores and CIS analog front-ends in smartphone camera modules. IC Role / Device Role / Timing Role: Fixed 1.0V regulator supplying critical digital logic domains requiring tight voltage tolerance. Use Value: ±1% accuracy and <0.29V dropout ensure reliable operation down to 1.7V Li-ion battery voltage. |
| Wearable BLE SoC Core Rail | Industrial Sensor Node MCU Supply |
|
Use Scenario: Delivering 1.0V core voltage to Bluetooth Low Energy SoCs (e.g., Nordic nRF52/nRF53) in hearables. IC Role / Device Role / Timing Role: Enable-controlled LDO enabling dynamic power gating of SoC subsystems during sleep modes. Use Value: 35µA quiescent current and 0.01µA shutdown current minimize average power in duty-cycled applications. |
Use Scenario: Regulating power for ultra-low-power microcontrollers (e.g., TI MSP430, ST STM32L0) in battery-operated condition monitoring sensors. IC Role / Device Role / Timing Role: Primary 300mA LDO converting 3.6V primary cell or 2-cell LiPo to precise 1.0V logic rail. Use Value: –40°C to +85°C operating range and ±30ppm/°C tempco ensure timing-critical peripherals remain within spec across environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MCP1700T-1002E/MB | 250mA max output; 6µVrms noise; no enable pin; SOT23-5 package | Lacks EN control and 300mA capability; better noise but lower current headroom | Choose when ultra-low noise dominates over programmability and current margin |
| Torex XC6210B102MR-G | 200mA output; 40µVrms noise; 1.0V ±2% accuracy; SOT25 package | Lower accuracy and current rating; smaller thermal resistance (RθJA = 179°C/W) | Prefer for cost-sensitive designs where 200mA suffices and SOT25 layout compatibility is required |
Compared with MCP1700T-1002E/MB and XC6210B102MR-G, the AP7343-10FS4-7B uniquely balances 300mA drive, ±1% accuracy, 75dB PSRR, and 1.0mm² footprint-making it optimal for next-gen compact RF and imaging subsystems demanding both performance and density.
Availability
AP7343-10FS4-7B is available at Aetrix Electronics and suitable for RF power amplifier biasing, mobile camera sensor core supplies, wearable BLE SoC core rails, and industrial sensor node MCU supplies requiring stable component supply across production lifecycles.
Supply support for AP7343-10FS4-7B 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 AP7343 series belongs to Diodes' high-PSRR, low-noise LDO portfolio-engineered specifically for noise-sensitive analog and RF subsystems in portable and battery-powered electronics.
FAQ
What is the minimum input voltage required for AP7343-10FS4-7B to maintain 1.0V output at 300mA?
The minimum input voltage is determined by dropout: at 300mA and VOUT = 1.0V, max dropout is 0.29V (X2-DFN1010-4), so VIN must be ≥ 1.29V. However, the absolute minimum specified VIN is 1.7V across temperature and process corners to guarantee regulation and PSRR performance.
Can the AP7343-10FS4-7B be used without an enable signal?
Yes-tie the EN pin directly to VIN to force permanent ON operation. This configuration draws only 35µA quiescent current and eliminates external control complexity while retaining all regulation features including thermal shutdown and short-circuit protection.
Is the exposed pad (EP) electrically connected to GND internally?
No-the EP is not internally connected to any pin. It serves solely as a thermal conduction path. Per datasheet guidance, it should be soldered to a large GND copper area on the PCB to improve heat dissipation, but must not be used as the sole GND connection for the device.
How does the AP7343-10FS4-7B handle output short-circuit events?
When VOUT is shorted to GND, the internal current-limit circuit activates and clamps output current to ~55mA. Simultaneously, thermal shutdown engages if junction temperature exceeds +150°C. Both protections are fully integrated and require no external components to function.
AP7343-10FS4-7B Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- 4-XDFN Exposed Pad
- 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):
- 1V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.7V @ 300mA
- Current - Output:
- 300mA
- Current - Quiescent (Iq):
- 60 µA
- Current - Supply (Max):
- -
- PSRR:
- 75dB (1kHz)
- Control Features:
- Enable
- Protection Features:
- Over Current
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- X2-DFN1010-4
AP7343-10FS4-7B FAQ
1.How can I place an order for AP7343-10FS4-7B through Aetrix?
Please submit a Request for Quotation (RFQ) for AP7343-10FS4-7B 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 AP7343-10FS4-7B reliable?
The price and inventory of AP7343-10FS4-7B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP7343-10FS4-7B is usually 5 days.
3.What payment methods are accepted for AP7343-10FS4-7B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP7343-10FS4-7B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP7343-10FS4-7B?
AP7343-10FS4-7B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP7343-10FS4-7B 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 AP7343-10FS4-7B?
For technical support, including AP7343-10FS4-7B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP7343-10FS4-7B requirements.
6.How does Aetrix verify that AP7343-10FS4-7B is sourced from the original manufacturer or authorized distributors?
All AP7343-10FS4-7B 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 AP7343-10FS4-7B meets industry standards.
7.What is the process for return or replacement of AP7343-10FS4-7B?
All AP7343-10FS4-7B units undergo pre-shipment inspection (PSI). If there is an issue with AP7343-10FS4-7B, 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 AP7343-10FS4-7B part is unused and in its original packaging.
Return procedure for AP7343-10FS4-7B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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