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Diodes Incorporated AP7354-28FS4-7
- Part No.:
- AP7354-28FS4-7
- Manufacturer:
- Diodes Incorporated
- Package:
- 4-XDFN Exposed Pad
- Datasheet:
-
AP7354-28FS4-7.pdf
- Description:
- IC REG LINEAR 2.8V 150MA 4DFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,628
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Product details
Overview
AP7354-28FS4-7 from Diodes Incorporated is a fixed 2.8V, 150mA ultra-low quiescent current LDO regulator in X2-DFN1010-4 (Type B) package with ±1% output accuracy, 0.25µA quiescent current, and enable control-designed for power management in battery-operated wearable sensors and IoT edge nodes.
For engineers reviewing the AP7354-28FS4-7 datasheet, AP7354-28FS4-7 pinout, AP7354-28FS4-7 application, or AP7354-28FS4-7 equivalent, key selection criteria include dropout voltage at 150mA (0.19V typ), EN logic thresholds (0.4V low / 1.0V high), output discharge capability (35Ω active discharge resistance), and thermal resistance (295°C/W junction-to-ambient).
Technical Context
The AP7354-28FS4-7 integrates a precision voltage reference, error amplifier, current-limit circuit, and enable input to deliver stable 2.8V output across 2.0–5.5V input range. Its internal resistor network fixes VOUT without external feedback components.
It supports two operational states: active regulation (EN ≥ 1.0V) and ultra-low standby mode (EN ≤ 0.4V, ISTANDBY = 0.02µA typ). Output discharge is enabled via internal NMOS path when EN is low, discharging COUT through 35Ω typical resistance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 2.8V ±1% at +25°C; ±2% over -40°C to +85°C - ensures stable rail for 2.8V logic or analog circuitry |
| Max Output Current | 150mA - sufficient for microcontrollers, BLE radios, and image sensor biasing in compact wearables |
| Quiescent Current | 0.25µA typ - extends battery life in always-on sensor nodes by minimizing idle power loss |
| Dropout Voltage | 0.19V typ at 150mA - enables operation down to VIN = 2.99V, critical for single-cell Li-ion or coin-cell systems |
| Enable Thresholds | VEN(H) = 1.0V min, VEN(L) = 0.4V max - compatible with 1.8V/3.3V GPIO without level-shifting |
| Active Output Discharge | 35Ω typ resistance - rapidly discharges output capacitor on shutdown to prevent floating or back-powering |
| Thermal Resistance θJA | 295°C/W - requires careful PCB copper area allocation in X2-DFN1010-4 footprint for sustained 150mA loads |
Pinout & Package
X2-DFN1010-4 (Type B) is a 1.0mm × 1.0mm, 0.39mm height, 4-terminal surface-mount package with exposed thermal pad (no electrical connection). Lead finish: NiPdAu over copper, solderable per MIL-STD-202 Method 208.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 | VOUT | Regulated 2.8V output; connects directly to load and local 0.1µF ceramic decoupling capacitor |
| Pin 2 | GND | Power ground reference; must be connected to PCB ground plane with low-impedance path |
| Pin 3 | EN | Active-high enable; driven high (>1.0V) to activate regulator, low (<0.4V) to enter shutdown with discharge |
| Pin 4 | VIN | Input supply (2.0–5.5V); requires 0.1µF ceramic capacitor placed adjacent to this pin and GND |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low quiescent current | 0.25µA typ enables >1-year battery life in 10µA average-current wearable applications |
| Integrated output discharge | 35Ω NMOS discharge path eliminates need for external bleed resistor in space-constrained designs |
| High accuracy over temperature | ±2% VOUT tolerance across -40°C to +85°C ensures reliable ADC reference or RF bias stability |
| Robust ESD protection | 4kV HBM / 400V MM rating allows safe handling in low-voltage portable assembly environments |
| Small-footprint packaging | X2-DFN1010-4 (1.0mm × 1.0mm) reduces board area by 75% vs. SOT25, ideal for hearables and patches |
Applications
| Wearable Health Monitor | IoT Environmental Sensor Node |
|---|---|
|
Use Scenario: Continuous ECG/PPG sensing in wrist-worn device powered by CR2032 coin cell. IC Role / Device Role / Timing Role: Primary 2.8V power rail for analog front-end and low-power MCU during sleep/wake cycles. Use Value: 0.25µA IQ extends coin-cell lifetime beyond 18 months while maintaining fast EN-controlled wake-up response. |
Use Scenario: Battery-powered soil moisture and temperature node transmitting data every 15 minutes via LoRaWAN. IC Role / Device Role / Timing Role: Stable 2.8V supply for precision ADC, RF transceiver, and microcontroller core. Use Value: ±1% VOUT accuracy ensures consistent sensor calibration; active discharge prevents residual VOUT from interfering with deep-sleep state. |
| Smart Hearing Aid | Miniature Camera Module |
|
Use Scenario: Powering MEMS microphone preamp and DSP in sub-10mm³ earbud form factor. IC Role / Device Role / Timing Role: Low-noise, low-ripple 2.8V source enabling high-SNR audio capture. Use Value: 295°C/W θJA and 0.19V dropout allow full 150mA delivery within tight thermal envelope of sealed enclosure. |
Use Scenario: Compact USB-C webcam using single-cell Li-ion battery and 2.8V image sensor. IC Role / Device Role / Timing Role: Dedicated LDO for CIS analog supply, isolated from noisy digital rails. Use Value: Load regulation of ±40mV up to 150mA maintains pixel uniformity during burst capture; small DFN footprint fits under lens barrel. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MCP1700T-2802E/TT | 2.8V fixed, 250mA, 1.6µA IQ, SOT23-5 - 6.4× higher quiescent current, no output discharge | Lacks active discharge; unsuitable where rapid VOUT collapse is required post-shutdown | Choose only if higher output current margin is needed and standby current is secondary |
| Torex XC6210B282MR-G | 2.8V fixed, 150mA, 1.0µA IQ, SOT25-5 - includes discharge but larger 2.8mm × 2.9mm footprint | Requires 3.5× more PCB area than X2-DFN1010-4; higher θJA (220°C/W) limits thermal headroom | Select when board layout permits larger package and discharge function is mandatory |
Compared with MCP1700T-2802E/TT and XC6210B282MR-G, AP7354-28FS4-7 uniquely combines ultra-low 0.25µA IQ, integrated discharge, and 1.0mm² footprint-making it optimal for miniaturized, long-life battery systems where every nanoamp and square millimeter matters.
Availability
AP7354-28FS4-7 is available at Aetrix Electronics and suitable for wearable electronics, IoT sensor nodes, and miniature camera modules requiring stable component supply with guaranteed long-term availability and RoHS-compliant sourcing.
Supply support for AP7354-28FS4-7 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-volume industrial and consumer markets.
The AP7354 series targets ultra-low-power battery-operated applications, delivering high-accuracy LDO performance in minimal footprints for wearables, medical sensors, and wireless edge devices.
FAQ
What is the minimum input voltage required for AP7354-28FS4-7 to maintain regulation at 150mA?
The dropout voltage is 0.19V typical at 150mA, so VIN must be ≥ 2.99V (2.8V + 0.19V) to sustain regulation. At worst-case 0.40V dropout (per datasheet max), VIN must be ≥ 3.2V. Operation below 2.0V input is not supported per absolute maximum ratings.
Does AP7354-28FS4-7 require an external pull-up on the EN pin for default-on operation?
No external pull-up is required. To enable continuous operation, tie EN directly to VIN. The EN pin has no internal pull-up; leaving it floating violates the "must not be floating" requirement in the datasheet and may cause erratic startup or shutdown behavior.
Can AP7354-28FS4-7 be used with ceramic output capacitors smaller than 0.1µF?
Yes, but stability is not guaranteed. The datasheet specifies 0.1µF as the minimum recommended value for stability across temperature and load. Using smaller values (e.g., 10nF) may cause oscillation or poor transient response, especially above 50mA load steps.
Is the center pad on the X2-DFN1010-4 (Type B) package electrically connected?
No. The center pad is thermally conductive but electrically isolated. It must remain unconnected or tied to GND solely for thermal enhancement-never to VIN or VOUT-as doing so creates a short. PCB layout must follow Diodes' recommended pad dimensions to avoid solder bridging.
AP7354-28FS4-7 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):
- 2.8V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.4V @ 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
AP7354-28FS4-7 FAQ
1.How can I place an order for AP7354-28FS4-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP7354-28FS4-7 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 AP7354-28FS4-7 reliable?
The price and inventory of AP7354-28FS4-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP7354-28FS4-7 is usually 5 days.
3.What payment methods are accepted for AP7354-28FS4-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP7354-28FS4-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP7354-28FS4-7?
AP7354-28FS4-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP7354-28FS4-7 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 AP7354-28FS4-7?
For technical support, including AP7354-28FS4-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP7354-28FS4-7 requirements.
6.How does Aetrix verify that AP7354-28FS4-7 is sourced from the original manufacturer or authorized distributors?
All AP7354-28FS4-7 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 AP7354-28FS4-7 meets industry standards.
7.What is the process for return or replacement of AP7354-28FS4-7?
All AP7354-28FS4-7 units undergo pre-shipment inspection (PSI). If there is an issue with AP7354-28FS4-7, 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 AP7354-28FS4-7 part is unused and in its original packaging.
Return procedure for AP7354-28FS4-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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