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Diodes Incorporated AP7354D-33W5-7
- Part No.:
- AP7354D-33W5-7
- Manufacturer:
- Diodes Incorporated
- Package:
- SC-74A, SOT-753
- Datasheet:
-
AP7354D-33W5-7.pdf
- Description:
- IC REG LINEAR 3.3V 150MA SOT25
- Quantity:
- Payment:
- Shipping:
Inventory:86,560
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Product details
Overview
AP7354D-33W5-7 from Diodes Incorporated is a 3.3V fixed-output, 150mA ultra-low quiescent current LDO regulator in SOT25 package with integrated enable control and active output discharge. It operates from 2.0V to 5.5V input, delivers ±1% output accuracy at +25°C, and draws only 0.25µA quiescent current - optimized for battery-powered wearable electronics and IoT sensor modules requiring multi-year runtime.
For engineers reviewing the AP7354D-33W5-7 datasheet, AP7354D-33W5-7 pinout, AP7354D-33W5-7 application, or AP7354D-33W5-7 equivalent, key selection criteria include dropout voltage at 150mA (0.16V typ), EN logic thresholds (0.4V low / 1.0V high), active discharge resistance (35Ω), and thermal performance in SOT25 (θJA = 162°C/W).
Technical Context
The AP7354D-33W5-7 integrates a precision voltage reference, error amplifier, current-limit circuit, and enable-controlled pass transistor. Its architecture supports fast turn-on/turn-off response (typ. 10µs) and stable operation with 0.1µF ceramic input/output capacitors.
Unlike non-discharge variants (e.g., AP7354-33W5-7), this D-suffix version includes an internal NMOS discharge switch between VOUT and GND, activated when EN is low - preventing floating output during shutdown and eliminating need for external bleed resistors in space-constrained designs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 3.3V ±1% at +25°C; ensures reliable MCU core/logic rail regulation without external feedback components. |
| Max Output Current | 150mA guaranteed; sufficient to power BLE SoCs, image sensors, or low-power microcontrollers in compact wearables. |
| Quiescent Current | 0.25µA typical; extends battery life in always-on sensor nodes by minimizing standby drain. |
| Dropout Voltage | 0.16V typical at 150mA; enables operation down to 3.46V input while maintaining regulated 3.3V output. |
| Enable Thresholds | VEN(H) ≥ 1.0V, VEN(L) ≤ 0.4V; compatible with 1.8V/3.3V GPIOs without level-shifting. |
| Active Discharge | 35Ω typical resistance; discharges 10µF load to <0.5V within ~350µs, preventing latch-up in downstream circuitry. |
| Thermal Resistance | θJA = 162°C/W (SOT25); allows 150mA continuous operation up to +70°C ambient with minimal PCB copper. |
Pinout & Package
SOT25 package: 5-pin surface-mount, 2.8mm × 2.9mm footprint, 1.1mm height, matte tin-plated leads compliant with MIL-STD-202 Method 208.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VIN | Main power input; accepts 2.0–5.5V; requires local 0.1µF ceramic decoupling capacitor. |
| 2 | GND | Analog/digital ground reference; must connect directly to low-impedance PCB ground plane. |
| 3 | VOUT | Regulated 3.3V output; supplies load and feeds external 0.1µF ceramic capacitor for stability. |
| 4 | EN | Active-high enable; driven high (>1.0V) to activate regulator, low (<0.4V) to enter shutdown with discharge. |
| 5 | GND | Second ground terminal; electrically tied to Pin 2 internally; improves thermal dissipation and noise immunity. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low IQ | 0.25µA typical enables >10-year battery life in coin-cell-powered IoT endpoints. |
| Integrated Output Discharge | Eliminates need for external 100kΩ bleed resistor, saving board space and BOM cost in portable designs. |
| High Accuracy Output | ±1% at +25°C and ±2% over -40°C to +85°C ensures consistent logic-level compatibility across temperature. |
| Robust ESD Protection | 4kV HBM / 400V MM rating protects against handling damage during assembly and field operation. |
| Wide Input Range | 2.0V–5.5V operation supports single-cell Li-ion, Li-polymer, or dual-cell alkaline inputs without pre-regulation. |
Applications
| Wearable Fitness Tracker | IoT Environmental Sensor Node |
|---|---|
Use Scenario: Continuous heart-rate monitoring using optical sensor and ARM Cortex-M0+ MCU powered by CR2032 coin cell. IC Role / Device Role / Timing Role: Primary 3.3V supply for analog front-end and digital subsystem; enabled only during measurement bursts. Use Value: 0.25µA quiescent current extends battery life to 24+ months; active discharge prevents sensor bias drift during sleep mode. |
Use Scenario: Battery-operated soil moisture/temperature node transmitting data via LoRaWAN every 15 minutes. IC Role / Device Role / Timing Role: Stable 3.3V rail for ultra-low-power MCU, RF transceiver, and ADC during brief active periods. Use Value: 150mA capability supports peak transmit current; 0.16V dropout preserves runtime as battery discharges from 3.6V to 3.46V. |
| Smart Camera Module | Industrial Wireless Transmitter |
Use Scenario: Miniature USB-C camera with CMOS image sensor and video encoder operating from single Li-ion cell. IC Role / Device Role / Timing Role: Clean 3.3V supply for image sensor interface and ISP logic; EN synchronized with frame capture. Use Value: Fast 10µs turn-on ensures no frame loss during wake-up; ±1% accuracy maintains ADC reference integrity. |
Use Scenario: DIN-rail mounted pressure transmitter with 4–20mA loop and Bluetooth diagnostics, powered by 24V DC. IC Role / Device Role / Timing Role: Local 3.3V regulator for BLE SoC and signal conditioning ASIC, isolated from noisy industrial supply. Use Value: 162°C/W θJA enables convection-only cooling in sealed enclosure; ESD robustness withstands factory ESD events. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MCP1700-3302E/TO | 3.3V, 250mA, 1.8µA IQ, no EN pin, TO-92 package | Lacks enable control and active discharge; unsuitable for burst-mode systems requiring precise power sequencing. | Select only if board space allows through-hole mounting and shutdown control is handled externally. |
| Torex XC6210B332MR-G | 3.3V, 150mA, 1.0µA IQ, SOT-25, no discharge function | Higher quiescent current reduces battery life by ~4× vs. AP7354D; no integrated discharge path. | Choose when cost sensitivity outweighs ultra-low IQ and discharge requirements. |
Compared with MCP1700-3302E/TO and XC6210B332MR-G, the AP7354D-33W5-7 uniquely combines sub-µA quiescent current, enable control, and active discharge in a miniature SOT25 package - making it optimal for space- and energy-constrained wireless edge devices.
Availability
AP7354D-33W5-7 is available at Aetrix Electronics and suitable for wearable electronics, IoT sensor nodes, and wireless communication modules requiring stable component supply with long-term manufacturability and RoHS/Green compliance.
Supply support for AP7354D-33W5-7 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 power management, signal integrity, and protection solutions for consumer, industrial, and automotive markets.
The AP7354 series belongs to Diodes' ultra-low-IQ LDO product line, engineered specifically for extended-battery-life applications in portable and wireless edge devices where efficiency, size, and reliability are critical.
FAQ
What is the minimum input voltage required to maintain 3.3V output at 150mA?
The AP7354D-33W5-7 requires VIN ≥ 3.46V to sustain 3.3V output at full 150mA load, based on its typical 0.16V dropout voltage. At lower loads, it regulates down to 2.0V input, but full-rated current is only guaranteed above the dropout threshold.
Can the EN pin be left unconnected if always-on operation is desired?
No - the EN pin must never be left floating. For permanent enable, tie EN directly to VIN. Leaving it open risks undefined behavior due to noise coupling, potentially causing intermittent shutdown or excessive ground current.
Does the active output discharge function operate when VIN is removed?
No - the discharge switch requires VIN to be present and EN low to activate. If VIN drops first (e.g., battery disconnect), the discharge path is inactive; VOUT will decay only through load leakage or external paths.
Is the SOT25 package thermally enhanced compared to SOT23 for this device?
Yes - the SOT25 package has θJA = 162°C/W versus 170°C/W for SOT23, offering slightly better thermal performance. The dual-GND pins (Pins 2 and 5) improve heat spreading and reduce junction temperature under 150mA continuous load.
AP7354D-33W5-7 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):
- 5.5V
- Voltage - Output (Min/Fixed):
- 3.3V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.35V @ 150mA
- Current - Output:
- 150mA
- Current - Quiescent (Iq):
- 0.6 µA
- Current - Supply (Max):
- -
- PSRR:
- -
- Control Features:
- Enable
- Protection Features:
- Over Current
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-25
AP7354D-33W5-7 FAQ
1.How can I place an order for AP7354D-33W5-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP7354D-33W5-7 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 AP7354D-33W5-7 reliable?
The price and inventory of AP7354D-33W5-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP7354D-33W5-7 is usually 5 days.
3.What payment methods are accepted for AP7354D-33W5-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP7354D-33W5-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP7354D-33W5-7?
AP7354D-33W5-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP7354D-33W5-7 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 AP7354D-33W5-7?
For technical support, including AP7354D-33W5-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP7354D-33W5-7 requirements.
6.How does Aetrix verify that AP7354D-33W5-7 is sourced from the original manufacturer or authorized distributors?
All AP7354D-33W5-7 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 AP7354D-33W5-7 meets industry standards.
7.What is the process for return or replacement of AP7354D-33W5-7?
All AP7354D-33W5-7 units undergo pre-shipment inspection (PSI). If there is an issue with AP7354D-33W5-7, 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 AP7354D-33W5-7 part is unused and in its original packaging.
Return procedure for AP7354D-33W5-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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