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Diodes Incorporated AP7354D-33FS4-7
- Part No.:
- AP7354D-33FS4-7
- Manufacturer:
- Diodes Incorporated
- Package:
- 4-XDFN Exposed Pad
- Datasheet:
-
AP7354D-33FS4-7.pdf
- Description:
- IC REG LINEAR 3.3V 150MA 4DFN
- Quantity:
- Payment:
- Shipping:
Inventory:9,735
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Product details
Overview
AP7354D-33FS4-7 from Diodes Incorporated is a 3.3V fixed-output, 150mA ultra-low quiescent current LDO regulator in X2-DFN1010-4 (Type B) package with integrated active output discharge, ±1% output voltage accuracy at +25°C, and 0.25µA typical quiescent current-designed for power management in compact battery-operated IoT sensor modules.
For engineers reviewing the AP7354D-33FS4-7 datasheet, AP7354D-33FS4-7 pinout, AP7354D-33FS4-7 application, or AP7354D-33FS4-7 equivalent, key selection criteria include discharge-enabled shutdown behavior, thermal resistance (295°C/W J-A), dropout voltage at 150mA (0.16V typ), and compatibility with 0.1µF ceramic input/output capacitors in space-constrained wearable designs.
Technical Context
The AP7354D-33FS4-7 integrates an error amplifier, precision voltage reference, current-limit circuit, and enable-controlled pass transistor to regulate output from 2.0V–5.5V input while maintaining 3.3V ±1% accuracy across -40°C to +85°C ambient.
Its active output discharge path (35Ω typical) pulls VOUT to GND when EN is low, preventing floating rail conditions in multi-rail systems; the device operates with only 0.02µA standby current and supports fast turn-on/turn-off timing under 150mA load steps.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 3.3V ±1% at +25°C; ±2% over full temperature range-ensures stable MCU core or sensor biasing without external feedback. |
| Max Output Current | 150mA guaranteed-sufficient to power BLE SoCs, image sensors, or low-power microcontrollers in compact edge nodes. |
| Quiescent Current | 0.25µA typical-enables >1-year battery life in coin-cell-powered devices with infrequent wake cycles. |
| Dropout Voltage | 0.16V typical at 150mA-allows operation down to 3.46V input, extending usable voltage window of 3.7V Li-ion cells. |
| Enable Threshold | VEN(H) ≥1.0V, VEN(L) ≤0.4V-compatible with 1.8V/3.3V GPIO without level-shifting. |
| Thermal Resistance | 295°C/W (J-A) in X2-DFN1010-4-requires minimal PCB copper area for thermal management in 1.0mm² footprint designs. |
| ESD Rating | 4kV HBM-robust enough for handling during automated assembly of wearable PCBs without special ESD controls. |
Pinout & Package
X2-DFN1010-4 (Type B) package: 1.0mm × 1.0mm body, 0.65mm pitch, no exposed pad; RoHS-compliant NiPdAu-plated terminals solderable per MIL-STD-202 Method 208.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 | VOUT | Regulated 3.3V output; connects directly to load IC supply rail and local 0.1µF ceramic capacitor. |
| Pin 2 | GND | Power ground reference; must be routed to low-impedance system ground plane to minimize noise coupling. |
| Pin 3 | EN | Active-high enable; pulled high to VIN for always-on operation or driven by microcontroller GPIO for controlled power sequencing. |
| Pin 4 | VIN | Input supply (2.0–5.5V); requires 0.1µF ceramic decoupling capacitor placed adjacent to this pin. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low quiescent current | 0.25µA typical enables >10-year shelf life in sealed IoT nodes with primary lithium batteries. |
| Integrated output discharge | 35Ω active pull-down ensures rapid VOUT decay on shutdown-critical for safe power sequencing in multi-voltage systems. |
| High accuracy over temperature | ±2% output tolerance from -40°C to +85°C eliminates need for post-production calibration in industrial sensor modules. |
| Stable with minimal capacitance | Guaranteed stability with 0.1µF X5R/X7R ceramic capacitors-reduces BOM count and PCB area vs. larger tantalum alternatives. |
| Wide input voltage range | 2.0V–5.5V operation supports direct connection to single-cell Li-ion, LiFePO₄, or 3.3V/5V system rails without pre-regulation. |
Applications
| Wearable Health Monitor | IoT Environmental Sensor Node |
|---|---|
|
Use Scenario: Continuous heart-rate monitoring using optical sensor and BLE MCU powered by CR2032 coin cell. IC Role / Device Role / Timing Role: Primary 3.3V power regulator enabling low-duty-cycle wake/sleep cycling with sub-µA shutdown leakage. Use Value: 0.02µA standby current extends battery life beyond 24 months while active discharge prevents residual VOUT from interfering with sensor reset timing. |
Use Scenario: Battery-powered soil moisture and temperature node deployed in agricultural fields for 5+ years. IC Role / Device Role / Timing Role: Stable 3.3V supply for ultra-low-power microcontroller and analog front-end during periodic 10-second measurement bursts. Use Value: ±1% output accuracy ensures consistent ADC reference voltage across temperature swings, eliminating calibration drift in long-term deployments. |
| Smart Camera Module | Industrial Wireless Transceiver |
|
Use Scenario: Miniature USB-C camera module with image sensor and ISP requiring clean, low-noise 3.3V rail. IC Role / Device Role / Timing Role: Post-regulator delivering low-ripple power after DC-DC conversion, with fast transient response to pixel readout current spikes. Use Value: 0.16V dropout at 150mA allows operation from 3.46V input-maximizing usable capacity of 3.7V Li-ion battery before DC-DC stage intervention. |
Use Scenario: DIN-rail mounted LoRaWAN gateway with isolated RS-485 interface and backup supercapacitor hold-up. IC Role / Device Role / Timing Role: Standby power supervisor that maintains real-time clock and memory retention during main supply interruption. Use Value: Active discharge ensures VOUT collapses within 100µs of EN deactivation-preventing latch-up in isolated communication ICs during brown-out recovery. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MCP1700T-3302E/MB | No active output discharge; 1.6µA quiescent current; SOT-23-5 package. | Lacks discharge function-requires external MOSFET circuit for rail collapse in safety-critical shutdowns. | Select when board space permits SOT-23 and discharge is not required; higher IQ reduces battery life in always-on nodes. |
| Torex XC6210B332MR-G | 0.6µA IQ; no EN pin; fixed 3.3V; SOT-25 package; no discharge. | EN-less architecture simplifies control but eliminates programmable power sequencing capability. | Choose for cost-sensitive, non-sequenced applications where lowest possible IQ is secondary to part count reduction. |
Compared with MCP1700T-3302E/MB and XC6210B332MR-G, the AP7354D-33FS4-7 uniquely combines sub-µA quiescent current, integrated discharge, and 1.0mm² DFN packaging-making it optimal for miniaturized, sequenced, battery-constrained systems where rail control integrity is mandatory.
Availability
AP7354D-33FS4-7 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 manufacturability.
Supply support for AP7354D-33FS4-7 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 series targets ultra-low-power battery-operated applications, emphasizing extended runtime, small-footprint integration, and robust performance across wide temperature ranges in resource-constrained edge devices.
FAQ
What is the minimum input voltage required for AP7354D-33FS4-7 to maintain regulation at full 150mA load?
The minimum input voltage is determined by dropout: at 150mA, typical dropout is 0.16V, so VIN must be ≥3.46V (3.3V + 0.16V) to sustain regulation. The absolute minimum specified VIN is 2.0V, but below 3.46V, output will droop proportionally to load current and temperature.
Can the AP7354D-33FS4-7 be used without connecting the EN pin?
Yes-EN can be tied directly to VIN to enable continuous operation. However, leaving EN floating is prohibited; it must be actively driven high or low. Tying to VIN eliminates external control but retains all other performance characteristics including discharge functionality during power removal.
Is the X2-DFN1010-4 (Type B) package thermally adequate for 150mA continuous operation in still air?
At 150mA and 3.3V output, power dissipation is ~15mW (assuming 3.6V input). With θJA = 295°C/W, junction rise is ~4.4°C-well within limits. No heatsinking is needed; standard 1oz copper on top layer suffices for continuous operation in ambient up to +85°C.
Does the active output discharge function operate when the input voltage is removed while EN remains high?
No-the discharge circuit requires VIN to be present. When VIN drops below ~1.5V, the internal discharge FET turns off. Discharge only activates when EN is pulled low *while VIN is valid*; it does not provide "power-fail" discharge during input loss.
AP7354D-33FS4-7 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):
- 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:
- X2-DFN1010-4
AP7354D-33FS4-7 FAQ
1.How can I place an order for AP7354D-33FS4-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP7354D-33FS4-7 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-33FS4-7 reliable?
The price and inventory of AP7354D-33FS4-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP7354D-33FS4-7 is usually 5 days.
3.What payment methods are accepted for AP7354D-33FS4-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP7354D-33FS4-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP7354D-33FS4-7?
AP7354D-33FS4-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP7354D-33FS4-7 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-33FS4-7?
For technical support, including AP7354D-33FS4-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP7354D-33FS4-7 requirements.
6.How does Aetrix verify that AP7354D-33FS4-7 is sourced from the original manufacturer or authorized distributors?
All AP7354D-33FS4-7 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-33FS4-7 meets industry standards.
7.What is the process for return or replacement of AP7354D-33FS4-7?
All AP7354D-33FS4-7 units undergo pre-shipment inspection (PSI). If there is an issue with AP7354D-33FS4-7, 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-33FS4-7 part is unused and in its original packaging.
Return procedure for AP7354D-33FS4-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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