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Diodes Incorporated AP7354D-185W5-7
- Part No.:
- AP7354D-185W5-7
- Manufacturer:
- Diodes Incorporated
- Package:
- SC-74A, SOT-753
- Datasheet:
-
AP7354D-185W5-7.pdf
- Description:
- IC REG LINEAR 1.85V 150MA SOT25
- Quantity:
- Payment:
- Shipping:
Inventory:3,834
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Product details
Overview
AP7354D-185W5-7 from Diodes Incorporated is a 150mA ultra-low quiescent current LDO regulator with fixed 1.85V output, ±1% accuracy at +25°C, 0.25µA typical quiescent current, and integrated enable control. It operates across 2.0V–5.5V input range and delivers stable power to low-power wearable sensors and IoT edge nodes requiring extended battery life.
For engineers reviewing the AP7354D-185W5-7 datasheet, AP7354D-185W5-7 pinout, AP7354D-185W5-7 application, or AP7354D-185W5-7 equivalent, key selection criteria include dropout voltage at 150mA (0.32V typ), active output discharge capability, EN logic thresholds (0.4V low / 1.0V high), and SOT25 package thermal resistance (162°C/W).
Technical Context
The AP7354D integrates a precision voltage reference, error amplifier, current-limit circuit, and enable input-enabling precise regulation and controlled shutdown. Its architecture supports fast load transient response (<10µs settling) and maintains stability with only 0.1µF ceramic input/output capacitors.
Unlike non-discharge variants, the 'D' suffix denotes built-in active output discharge (35Ω typical), ensuring rapid VOUT decay during shutdown-critical for sequencing-sensitive systems. The device uses internal resistor networks for fixed-output versions and avoids external feedback components.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.85V ±1% at +25°C - ensures consistent biasing for 1.8V logic rails and low-voltage microcontrollers. |
| Quiescent Current | 0.25µA typical - enables >1-year battery life in coin-cell-powered wearables drawing µA-level standby current. |
| Dropout Voltage | 0.32V at 150mA - allows operation down to VIN = 2.17V while maintaining regulated 1.85V output. |
| Input Voltage Range | 2.0V to 5.5V - compatible with single Li-ion, two alkaline, or USB-supplied systems without external pre-regulation. |
| Enable Thresholds | VEN(HI) ≥ 1.0V, VEN(LO) ≤ 0.4V - interfaces directly with 1.8V/3.3V GPIO without level-shifting. |
| Output Discharge | Active discharge via 35Ω internal FET - discharges VOUT to GND within microseconds after EN deactivation, preventing back-powering. |
| Thermal Resistance | θJA = 162°C/W (SOT25) - supports 150mA continuous output at +85°C ambient with minimal derating. |
Pinout & Package
SOT25 package: 5-pin surface-mount plastic package with exposed pad (not electrically connected); footprint matches JEDEC TO-236AB standard; dimensions 2.80 × 2.90 × 1.10 mm (L × W × H).
| 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 connection to PCB ground plane. |
| 3 | VOUT | Regulated 1.85V output; connects to load and output capacitor (≥0.1µF ceramic). |
| 4 | EN | Active-high enable; driven high (>1.0V) to activate regulator, low (≤0.4V) to enter 0.02µA standby mode. |
| 5 | NC | No internal connection; left unconnected per datasheet - not used for thermal relief or grounding. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low quiescent current | 0.25µA typical - minimizes battery drain in always-on sensor nodes without compromising startup time. |
| Integrated output discharge | 35Ω active FET - eliminates need for external discharge resistor, reducing BOM count and board space. |
| High output accuracy | ±1% at +25°C, ±2% over –40°C to +85°C - ensures reliable operation of precision analog front-ends and ADC references. |
| Robust ESD protection | 4kV HBM, 400V MM - withstands handling and system-level ESD events without latch-up or parameter shift. |
| Wide input voltage range | 2.0V–5.5V - supports direct connection to primary batteries, USB ports, or intermediate supply rails. |
Applications
| Wearable Health Monitor | IoT Sensor Node |
|---|---|
Use Scenario: Continuous ECG/PPG sensing powered by CR2032 coin cell. IC Role / Device Role / Timing Role: Primary 1.85V supply for ultra-low-power MCU and analog signal chain. Use Value: 0.25µA quiescent current extends battery life beyond 18 months; active discharge prevents cross-talk during sleep/wake transitions. |
Use Scenario: Battery-powered environmental sensor transmitting data via BLE every 5 minutes. IC Role / Device Role / Timing Role: Stable 1.85V rail for MEMS accelerometer, temperature sensor, and BLE SoC RF section. Use Value: 0.32V dropout enables full utilization of declining battery voltage; ±1% accuracy maintains ADC linearity across temperature. |
| Wireless Camera Module | Industrial Edge Controller |
Use Scenario: Miniature Wi-Fi camera using single-cell Li-ion with intermittent video capture. IC Role / Device Role / Timing Role: Dedicated LDO for image sensor analog core and PLL clock generation. Use Value: Fast transient response (<10µs) suppresses voltage droop during pixel readout bursts; EN pin enables synchronized power gating. |
Use Scenario: DIN-rail mounted PLC I/O module operating in industrial cabinets at +70°C ambient. IC Role / Device Role / Timing Role: Local 1.85V supply for isolated digital isolators and CAN transceiver logic interface. Use Value: 162°C/W θJA and –40°C to +85°C rating ensure reliability without heatsinking; ±2% accuracy over temp guarantees deterministic timing margins. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MCP1700T-1802E/TT | 100mA output, 1.8V fixed, 1.6µA IQ, no EN pin, SOT23-3 | Lacks enable control and output discharge; limited to lower-current, simpler systems | Select when cost sensitivity outweighs need for shutdown control and higher load capability. |
| Torex XC6219B185MR-G | 150mA output, 1.85V fixed, 1.0µA IQ, EN pin, SOT25, no discharge | Higher quiescent current; lacks active discharge - requires external circuitry for VOUT bleed-down | Choose where ultra-low IQ is secondary to proven field reliability and long-term availability. |
Compared with MCP1700T-1802E/TT and XC6219B185MR-G, AP7354D-185W5-7 uniquely combines 150mA drive, 0.25µA IQ, EN control, and integrated discharge in SOT25-making it optimal for space-constrained, battery-critical designs requiring clean power sequencing.
Availability
AP7354D-185W5-7 is available at Aetrix Electronics and suitable for wearable electronics, IoT sensor modules, and wireless communication devices requiring stable component supply, long-lifecycle support, and RoHS-compliant packaging.
Supply support for AP7354D-185W5-7 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 portfolio, designed specifically for energy-harvesting and battery-operated edge devices demanding nanowatt-level standby consumption and fast dynamic response.
FAQ
What is the maximum output current and corresponding dropout voltage for AP7354D-185W5-7?
The AP7354D-185W5-7 delivers up to 150mA output current. At this load, its typical dropout voltage is 0.32V (measured at VOUT = 1.85V), meaning VIN must remain ≥2.17V to maintain regulation. This value is confirmed in the Electrical Characteristics table under "Dropout Voltage" for VOUT = 1.85V at IOUT = 150mA.
Does AP7354D-185W5-7 require external capacitors, and what values are recommended?
Yes - a minimum 0.1µF ceramic capacitor is required between VIN and GND, and another 0.1µF ceramic capacitor between VOUT and GND. These values are validated for stability across –40°C to +85°C and support fast transient response. X5R/X7R dielectrics are recommended due to low ESR and minimal capacitance drift with temperature and DC bias.
How does the EN pin function, and what happens when it is left unconnected?
The EN pin is active-high: driving it ≥1.0V enables regulation; pulling it ≤0.4V forces shutdown with 0.02µA standby current. Leaving EN floating is prohibited - it must be tied to VIN (for always-on operation) or actively driven. Floating EN risks erratic enable/disable behavior due to noise coupling and violates absolute maximum ratings.
Is AP7354D-185W5-7 qualified for automotive applications?
No - AP7354D-185W5-7 is not AEC-Q100 qualified. Diodes Incorporated explicitly states that automotive-grade versions require specific change control, PPAP capability, and IATF 16949 manufacturing - none of which apply to this commercial-grade SOT25 variant. For automotive use, contact Diodes directly for qualified alternatives.
AP7354D-185W5-7 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):
- 1.85V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.58V @ 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-185W5-7 FAQ
1.How can I place an order for AP7354D-185W5-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP7354D-185W5-7 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-185W5-7 reliable?
The price and inventory of AP7354D-185W5-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP7354D-185W5-7 is usually 5 days.
3.What payment methods are accepted for AP7354D-185W5-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP7354D-185W5-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP7354D-185W5-7?
AP7354D-185W5-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP7354D-185W5-7 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-185W5-7?
For technical support, including AP7354D-185W5-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP7354D-185W5-7 requirements.
6.How does Aetrix verify that AP7354D-185W5-7 is sourced from the original manufacturer or authorized distributors?
All AP7354D-185W5-7 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-185W5-7 meets industry standards.
7.What is the process for return or replacement of AP7354D-185W5-7?
All AP7354D-185W5-7 units undergo pre-shipment inspection (PSI). If there is an issue with AP7354D-185W5-7, 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-185W5-7 part is unused and in its original packaging.
Return procedure for AP7354D-185W5-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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