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Diodes Incorporated AP7354-45W5-7
- Part No.:
- AP7354-45W5-7
- Manufacturer:
- Diodes Incorporated
- Package:
- SC-74A, SOT-753
- Datasheet:
-
AP7354-45W5-7.pdf
- Description:
- IC REG LINEAR 4.5V 150MA SOT25
- Quantity:
- Payment:
- Shipping:
Inventory:2,830
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Product details
Overview
AP7354-45W5-7 from Diodes Incorporated is a fixed 4.5V, 150mA ultra-low quiescent current LDO regulator in SOT25 package, featuring ±1% output accuracy over temperature, 0.25µA quiescent current, and integrated enable control for battery-powered wearable and IoT sensor modules.
For engineers reviewing the AP7354-45W5-7 datasheet, AP7354-45W5-7 pinout, AP7354-45W5-7 application, or AP7354-45W5-7 equivalent, key selection criteria include dropout voltage at 150mA (0.14–0.35V), standby current (0.02µA), EN logic thresholds (0.4V low / 1.0V high), and thermal resistance (162°C/W) in SOT25.
Technical Context
The AP7354-45W5-7 integrates a precision voltage reference, error amplifier, current-limit circuit, and active-high enable input-enabling precise regulation and zero-load shutdown. Its architecture supports stable operation with 0.1µF ceramic input/output capacitors and delivers 4.5V output across 2.0–5.5V input range.
It operates within –40°C to +85°C ambient, maintains ±1% VOUT accuracy at +25°C (±2% over full temperature), and exhibits load regulation of ±55mV across 1–150mA for the 4.5V variant-critical for low-power sensor biasing and microcontroller core supply.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 4.5V - provides stable rail for 3.3V/5V-compatible peripherals requiring tight tolerance |
| Max Output Current | 150mA - sufficient for BLE/Wi-Fi modules, image sensors, and low-power MCUs |
| Quiescent Current | 0.25µA - enables multi-year battery life in always-on wearable devices |
| VOUT Accuracy | ±1% at +25°C - ensures reliable ADC reference and analog signal chain integrity |
| Dropout Voltage | 0.14V (typ) at 150mA - allows operation down to 4.64V input, extending usable battery range |
| Enable Thresholds | VEN(H) = 1.0V min, VEN(L) = 0.4V max - compatible with 1.8V/3.3V GPIO without level-shifting |
| Thermal Resistance | θJA = 162°C/W (SOT25) - defines power dissipation limit (~315mW max at +40°C ambient) |
Pinout & Package
SOT25 package: 5-pin surface-mount plastic package with exposed pad not connected; dimensions 2.80 × 2.90 × 1.30 mm (L × W × H); RoHS-compliant matte tin-plated leads.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VIN | Main power input; must be decoupled with ≥0.1µF ceramic capacitor placed adjacent to pin |
| 2 | GND | Analog/digital ground reference; requires low-impedance PCB connection to minimize noise and dropout shift |
| 3 | VOUT | Regulated 4.5V output; connects directly to load; stability depends on ESR/capacitance of COUT |
| 4 | NC | No internal connection - must remain unconnected per datasheet; not used for thermal relief |
| 5 | EN | Active-high enable; drives regulator ON/OFF; floating state prohibited; ties to VIN if always-on operation required |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low IQ | 0.25µA quiescent current enables >10-year battery life in coin-cell-powered IoT nodes |
| High Accuracy | ±1% output voltage tolerance at room temperature ensures consistent MCU core voltage and sensor biasing |
| Wide Input Range | 2.0–5.5V input supports single-cell Li-ion, LiPo, alkaline, and USB-powered systems |
| Fast Enable Response | Turn-on time <100µs (typ) supports dynamic power gating in duty-cycled sensor applications |
| Robust Protection | 4kV HBM ESD rating and 400mA latch-up immunity ensure reliability in handheld assembly and field use |
Applications
| Wearable Health Monitor | IoT Environmental Sensor Node |
|---|---|
|
Use Scenario: Continuous heart-rate and SpO₂ monitoring using optical sensor ICs and BLE SoC. IC Role / Device Role / Timing Role: Primary 4.5V supply for analog front-end and BLE radio; enables low-duty-cycle wake-up via EN pin. Use Value: 0.02µA standby current extends CR2032 battery life beyond 2 years while maintaining fast wake-up response. |
Use Scenario: Battery-powered soil moisture and temperature node transmitting data hourly via LoRaWAN. IC Role / Device Role / Timing Role: Regulated 4.5V rail for MCU, RF transceiver, and analog sensor interface; EN controlled by RTC alarm. Use Value: ±1% VOUT accuracy ensures consistent ADC reference across temperature, reducing calibration drift in field deployments. |
| Smart Camera Module | Industrial Wireless Transmitter |
|
Use Scenario: Compact HD camera module in security or asset-tracking device powered by rechargeable LiPo. IC Role / Device Role / Timing Role: Supplies image sensor and ISP core; EN synchronized with camera capture trigger to minimize idle power. Use Value: 0.14V dropout at 150mA allows operation until battery voltage drops to 4.64V, maximizing usable capacity. |
Use Scenario: DIN-rail mounted vibration sensor transmitting data via NB-IoT; powered by 4.2V LiFePO₄ cell. IC Role / Device Role / Timing Role: Provides stable 4.5V for precision ADC and cellular modem; GND pin routing minimizes ground bounce during TX bursts. Use Value: 162°C/W θJA enables continuous 150mA operation at +60°C ambient without derating in enclosed enclosures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MCP1700-4502E/TO | Same 4.5V output, but 100mA max IOUT and higher 2.5µA IQ; TO-92 through-hole only | Limited to lower-current, non-SMT legacy designs; lacks EN pin and SOT25 footprint compatibility | Select only when through-hole assembly or cost-sensitive low-volume prototyping is required |
| Torex XC6219B452MR-G | 4.5V output, 150mA, 1.0µA IQ, SOT25 package; no built-in discharge path; ±2% accuracy over temp | Higher IQ reduces battery life in always-on wearables; same pinout but looser VOUT spec affects precision analog loads | Prefer for cost-sensitive industrial sensors where 0.25µA IQ is not mandatory and ±2% tolerance is acceptable |
Compared with MCP1700-4502E/TO and XC6219B452MR-G, the AP7354-45W5-7 uniquely combines SOT25 compatibility, 0.25µA IQ, ±1% accuracy, and EN control-making it optimal for space-constrained, long-life battery applications demanding precision and programmability.
Availability
AP7354-45W5-7 is available at Aetrix Electronics and suitable for wearable electronics, IoT sensor modules, and wireless communication devices requiring stable component supply with guaranteed long-term availability and traceable sourcing.
Supply support for AP7354-45W5-7 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-reliability power management, signal integrity, and protection solutions for industrial, computing, and consumer markets.
The AP7354 belongs to Diodes' ultra-low-IQ LDO family, designed specifically for extended-battery-life applications in wearables, medical sensors, and energy-harvesting systems where micropower efficiency and precision regulation are critical.
FAQ
What is the minimum input voltage required for AP7354-45W5-7 to maintain regulation at full load?
The AP7354-45W5-7 requires VIN ≥ 4.64V (4.5V + 0.14V typical dropout) to sustain 4.5V output at 150mA. At 25°C, the maximum dropout is 0.35V, so VIN must be ≥ 4.85V to guarantee regulation across all conditions per datasheet specifications.
Can the EN pin be left unconnected if always-on operation is needed?
No-the EN pin must never float. For always-on operation, tie EN directly to VIN. Leaving it unconnected risks undefined behavior due to leakage-induced partial turn-on, potentially increasing quiescent current and causing output instability.
Is output capacitor discharge supported on AP7354-45W5-7?
No-AP7354-45W5-7 is the non-discharge version. Only AP7354D-45W5-7 includes active output discharge. This part lacks the internal FET path from VOUT to GND, so external discharge circuitry is required if rapid VOUT decay is needed after shutdown.
What PCB layout practices maximize thermal performance in SOT25?
Use ≥25mm² copper pour connected to the GND pin (Pin 2) with ≥4 thermal vias (0.3mm diameter) to inner/ground planes. Avoid placing traces under the package body. Keep VIN and VOUT traces wide (>0.5mm) and short (<3mm) to minimize IR drop and inductance.
AP7354-45W5-7 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):
- 4.5V
- 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
AP7354-45W5-7 FAQ
1.How can I place an order for AP7354-45W5-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP7354-45W5-7 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 AP7354-45W5-7 reliable?
The price and inventory of AP7354-45W5-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP7354-45W5-7 is usually 5 days.
3.What payment methods are accepted for AP7354-45W5-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP7354-45W5-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP7354-45W5-7?
AP7354-45W5-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP7354-45W5-7 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 AP7354-45W5-7?
For technical support, including AP7354-45W5-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP7354-45W5-7 requirements.
6.How does Aetrix verify that AP7354-45W5-7 is sourced from the original manufacturer or authorized distributors?
All AP7354-45W5-7 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 AP7354-45W5-7 meets industry standards.
7.What is the process for return or replacement of AP7354-45W5-7?
All AP7354-45W5-7 units undergo pre-shipment inspection (PSI). If there is an issue with AP7354-45W5-7, 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 AP7354-45W5-7 part is unused and in its original packaging.
Return procedure for AP7354-45W5-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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