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Diodes Incorporated AP7354-18FS4-7
- Part No.:
- AP7354-18FS4-7
- Manufacturer:
- Diodes Incorporated
- Package:
- 4-XDFN Exposed Pad
- Datasheet:
-
AP7354-18FS4-7.pdf
- Description:
- IC REG LINEAR 1.8V 150MA 4DFN
- Quantity:
- Payment:
- Shipping:
Inventory:15,563
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Product details
Overview
AP7354-18FS4-7 from Diodes Incorporated is a fixed 1.8V, 150mA ultra-low quiescent current LDO regulator in X2-DFN1010-4 (Type B) package, featuring ±1% output voltage accuracy, 0.25µA typical quiescent current, and integrated enable control - designed for power-sensitive wearable sensors and IoT edge nodes requiring multi-year battery life.
For engineers reviewing the AP7354-18FS4-7 datasheet, AP7354-18FS4-7 pinout, AP7354-18FS4-7 application, or AP7354-18FS4-7 equivalent, key selection criteria include dropout voltage at 150mA (0.33V typ), active output discharge capability (35Ω typ), thermal resistance (295°C/W), and compatibility with 0.1µF ceramic input/output capacitors in space-constrained layouts.
Technical Context
The AP7354-18FS4-7 implements a precision bandgap reference and error amplifier to maintain 1.8V output within ±1% over -40°C to +85°C ambient, with line regulation of 0.02%/V and load regulation of ±40mV across 1–150mA. Its internal current-limit circuit protects against short-circuit faults up to 60mA.
Enable functionality is implemented via a dedicated EN pin (Pin 3) with 1.0V minimum high threshold and 0.4V maximum low threshold; when asserted high, the regulator delivers regulated output, and when pulled low, it enters standby mode drawing only 0.02µA. The device supports output discharge through an internal NMOS switch when configured as AP7354D variant - this part (AP7354-18FS4-7) is the non-discharge version.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.8V ±1% at 25°C; ensures stable MCU core or sensor biasing without external feedback network. |
| Max Output Current | 150mA continuous; sufficient to power BLE SoCs, MEMS sensors, or low-power microcontrollers in compact wearables. |
| Quiescent Current | 0.25µA typical; enables >10-year battery life in coin-cell-powered devices operating at µA-level duty cycles. |
| Dropout Voltage | 0.33V typical at 150mA; allows operation down to 2.13V input, supporting single-cell Li-ion or alkaline battery discharge profiles. |
| Input Voltage Range | 2.0V to 5.5V; compatible with wide-range energy sources including harvested power, USB, or multi-cell batteries. |
| EN Pin Thresholds | VIL ≤ 0.4V, VIH ≥ 1.0V; interfaces directly with 1.8V/3.3V GPIO without level-shifting. |
| Thermal Resistance | θJA = 295°C/W (X2-DFN1010-4); requires minimal PCB copper area for thermal management in ultra-thin modules. |
Pinout & Package
X2-DFN1010-4 (Type B) is a 1.0mm × 1.0mm, 0.39mm height, 4-terminal leadless package with exposed thermal pad (no electrical connection). It offers superior thermal performance vs. SOT23/SOT25 and enables <1mm² board footprint for miniaturized designs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 | VOUT | Regulated 1.8V output; connects directly to load rail and must be decoupled with 0.1µF ceramic capacitor placed adjacent to pin. |
| Pin 2 | GND | Analog/digital ground reference; requires low-impedance connection to PCB ground plane to minimize noise and dropout variation. |
| Pin 3 | EN | Active-high enable input; floating state is undefined - must be tied high (to VIN) or driven by microcontroller GPIO for controlled startup/shutdown. |
| Pin 4 | VIN | Unregulated input supply; accepts 2.0–5.5V; requires 0.1µF ceramic capacitor between VIN and GND, placed within 2mm of the pin. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low IQ | 0.25µA typical enables multi-year operation on CR2032 (225mAh) powering sub-10µA average-load systems. |
| High Accuracy Output | ±1% initial tolerance ensures reliable logic-level compliance for 1.8V I/O domains without post-production calibration. |
| Wide Input Range | 2.0V–5.5V supports direct connection to single Li-ion (2.7–4.2V), USB (5V), or dual-alkaline (3.0V) sources without pre-regulation. |
| Fast Enable Response | Turn-on time <100µs (typ) at 150mA load enables rapid wake-up from deep sleep in sensor-fusion applications. |
| Robust ESD Protection | 4kV HBM / 400V MM rating simplifies system-level ESD design for handheld and wearable end equipment. |
Applications
| Wearable Health Monitor | IoT Environmental Sensor Node |
|---|---|
|
Use Scenario: Continuous ECG/PPG sensing using ultra-low-power analog front-end and BLE transmitter. IC Role / Device Role / Timing Role: Primary 1.8V supply for ADC, op-amps, and BLE radio core; enables synchronized low-power sequencing via EN pin. Use Value: 0.25µA quiescent current extends CR2032 battery life beyond 3 years at 10s measurement interval. |
Use Scenario: Battery-powered temperature/humidity/pressure node transmitting data every 5 minutes via LoRaWAN. IC Role / Device Role / Timing Role: Stable 1.8V rail for digital sensor interface and microcontroller I/O; EN pin synchronizes power with RF transmission burst. Use Value: 0.33V dropout allows full utilization of Li-SOCl₂ cell (3.6V → 2.0V), maximizing usable capacity before cutoff. |
| Smart Camera Module | Industrial Wireless Transmitter |
|
Use Scenario: Miniature camera module with CMOS image sensor and embedded ISP processing firmware. IC Role / Device Role / Timing Role: Dedicated 1.8V supply for sensor digital interface and ISP core logic; decoupled from noisy 3.3V analog rail. Use Value: ±1% output accuracy prevents timing skew in MIPI CSI-2 clock/data recovery, reducing bit error rate. |
Use Scenario: DIN-rail mounted wireless transmitter monitoring vibration, current, or temperature in factory settings. IC Role / Device Role / Timing Role: Power source for low-power MCU and sub-GHz transceiver during periodic wake-up and reporting cycles. Use Value: 295°C/W θJA permits operation at +70°C ambient without derating, meeting industrial temperature requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MCP1700-1802E/TO | 150mA, 1.8V, 1.6µA IQ, TO-92 package (larger footprint, higher thermal resistance) | Lacks enable pin; unsuitable for dynamic power gating in duty-cycled systems | Select when cost sensitivity outweighs size/power constraints and enable control is unnecessary. |
| TPS7A0218PDBVR | 200mA, 1.8V, 25nA IQ, 1.5mm × 1.5mm WSON-6 package; includes active discharge | Higher cost; requires 6-pin layout and different decoupling strategy due to separate VBIAS pin | Select when nanoscale quiescent current is mandatory and board space allows 2.25mm² footprint. |
Compared with MCP1700-1802E/TO, AP7354-18FS4-7 provides enable control and 98% lower quiescent current in 1/10th the footprint; versus TPS7A0218PDBVR, it trades 25nA IQ for simpler 4-pin routing, lower cost, and proven reliability in high-volume wearables.
Availability
AP7354-18FS4-7 is available at Aetrix Electronics and suitable for wearable electronics, IoT sensor modules, and battery-operated imaging devices requiring stable component supply across long production lifecycles.
Supply support for AP7354-18FS4-7 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 high-reliability applications.
The AP7354 series belongs to Diodes' ultra-low-IQ LDO portfolio, engineered specifically for extended-battery-life portable and edge-sensing applications where micropower efficiency and small-footprint integration are critical.
FAQ
What is the maximum allowable input voltage for AP7354-18FS4-7?
The absolute maximum input voltage is 6.0V per the datasheet Absolute Maximum Ratings table. Operation above 5.5V violates recommended conditions and risks permanent damage. For sustained reliability, VIN must remain within 2.0V–5.5V, with 5.5V being the upper limit for continuous operation at all temperatures.
Does AP7354-18FS4-7 include output discharge functionality?
No. AP7354-18FS4-7 is the standard (non-discharge) version. Output discharge is only available in the AP7354D-18FS4-7 variant, which integrates a 35Ω NMOS switch between VOUT and GND when EN is low. This part lacks that feature and holds VOUT floating after shutdown.
Can AP7354-18FS4-7 operate with ceramic capacitors smaller than 0.1µF?
The datasheet specifies 0.1µF ceramic capacitors as the minimum for stability and transient response. Using smaller values may cause oscillation or poor load-step recovery. X5R/X7R dielectrics are recommended; avoid Y5V or Z5U due to capacitance drift with voltage and temperature.
Is the center pad on the X2-DFN1010-4 (Type B) package electrically connected?
No. The center thermal pad has no electrical function and must remain unconnected or grounded solely for thermal conduction - not for circuit reference. Diodes' datasheet explicitly states "No connection or ground" and warns that chip ground must be routed exclusively through Pin 2 (GND).
AP7354-18FS4-7 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):
- 5.5V
- Voltage - Output (Min/Fixed):
- 1.8V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.6V @ 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:
- X2-DFN1010-4
AP7354-18FS4-7 FAQ
1.How can I place an order for AP7354-18FS4-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP7354-18FS4-7 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 AP7354-18FS4-7 reliable?
The price and inventory of AP7354-18FS4-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP7354-18FS4-7 is usually 5 days.
3.What payment methods are accepted for AP7354-18FS4-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP7354-18FS4-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP7354-18FS4-7?
AP7354-18FS4-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP7354-18FS4-7 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 AP7354-18FS4-7?
For technical support, including AP7354-18FS4-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP7354-18FS4-7 requirements.
6.How does Aetrix verify that AP7354-18FS4-7 is sourced from the original manufacturer or authorized distributors?
All AP7354-18FS4-7 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 AP7354-18FS4-7 meets industry standards.
7.What is the process for return or replacement of AP7354-18FS4-7?
All AP7354-18FS4-7 units undergo pre-shipment inspection (PSI). If there is an issue with AP7354-18FS4-7, 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 AP7354-18FS4-7 part is unused and in its original packaging.
Return procedure for AP7354-18FS4-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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