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Diodes Incorporated AP7350D-185CF4-7
- Part No.:
- AP7350D-185CF4-7
- Manufacturer:
- Diodes Incorporated
- Package:
- 4-XFBGA, WLBGA
- Datasheet:
-
AP7350D-185CF4-7.pdf
- Description:
- LDO CMOS LOWCURR X2-WLB0606-4 T&
- Quantity:
- Payment:
- Shipping:
Inventory:3,017
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Product details
Overview
AP7350D-185CF4-7 from Diodes Incorporated is a 150mA ultra-low quiescent current LDO regulator with fixed 1.85V output, enable control, and active output discharge. It operates from 2.0V to 5.25V input, delivers ±1% output accuracy at +25°C, and draws only 0.25µA quiescent current-enabling multi-year battery life in compact wearable sensors and IoT edge nodes.
For engineers reviewing the AP7350D-185CF4-7 datasheet, AP7350D-185CF4-7 pinout, AP7350D-185CF4-7 application, or AP7350D-185CF4-7 equivalent, key selection criteria include its X2-WLB0606-4 wafer-level chip-scale package (0.64mm × 0.64mm), 0.32V dropout at 150mA/1.85V, EN-controlled shutdown with 0.02µA standby current, and built-in active discharge for rapid VOUT decay during disable.
Technical Context
The AP7350D integrates a precision voltage reference, error amplifier, current-limit circuit, and enable logic to regulate output with minimal external components. Its architecture supports stable operation with only 0.1µF ceramic input/output capacitors and includes internal protection against overcurrent, ESD (4kV HBM), and latch-up (400mA).
Unlike standard LDOs, the "D" variant adds an active output discharge path (35Ω typical) activated when EN is low, ensuring VOUT collapses rapidly to prevent back-powering downstream circuitry-a critical requirement in power-sequenced systems and battery-powered modules with shared rails.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.85V ±1% at +25°C; ±2% over -40°C to +85°C - ensures stable core voltage for low-power MCUs and sensors. |
| Quiescent Current | 0.25µA typical at +25°C - enables >10-year battery life in coin-cell–powered devices drawing µA-level average current. |
| Dropout Voltage | 0.32V max at 150mA/1.85V output - allows operation down to VIN = 2.17V, extending usable battery range in single-cell Li-ion/LiFePO₄ systems. |
| Enable Threshold | EN high ≥1.0V, EN low ≤0.4V - compatible with 1.8V/3.3V GPIO without level-shifting; prevents floating-induced erratic enable behavior. |
| Active Discharge | 35Ω typical discharge resistance - pulls VOUT to GND in <1ms after EN deactivation, eliminating hold-up voltage in multi-rail sequencing. |
| ESD Protection | 4kV HBM, 400V MM - meets IEC 61000-4-2 Level 3 for robustness in handheld and field-deployed IoT hardware. |
| Thermal Resistance | θJA = 267°C/W (X2-WLB0606-4) - limits junction temperature rise to <40°C at 150mA in still air, enabling fanless operation. |
Pinout & Package
The AP7350D-185CF4-7 uses the X2-WLB0606-4 wafer-level chip-scale package (0.64mm × 0.64mm, 0.34mm height), featuring SnAgCu solder balls and moisture sensitivity level 1 per J-STD-020.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (EN) | Enable control input | Logic-high (>1.0V) enables regulation; logic-low (<0.4V) disables output and activates discharge path. |
| 2 (GND) | Ground reference | Primary return path for input, output, and internal circuitry; must connect to low-impedance system ground plane. |
| 3 (VOUT) | Regulated output | Delivers stable 1.85V; connects directly to load and local 0.1µF ceramic capacitor placed adjacent to pin. |
| 4 (VIN) | Input power supply | Accepts 2.0–5.25V; requires 0.1µF ceramic decoupling capacitor placed within 1mm of this pin and GND. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low IQ | 0.25µA quiescent current enables >5-year shelf life in always-on sensor nodes powered by CR2032 batteries. |
| Active Output Discharge | Integrated 35Ω discharge FET eliminates need for external pull-down resistor, reducing BOM count and PCB area. |
| Miniature WLCSP | X2-WLB0606-4 footprint (0.41mm²) saves >70% board space vs. SOT-23, critical for wearables under 10mm² PCB real estate. |
| High Accuracy & Stability | ±1% initial tolerance and <0.1%/V line regulation ensure consistent MCU core voltage across battery discharge curve. |
| Robust Protection | Short-circuit current limit (60mA), thermal shutdown, and 4kV HBM ESD protect against assembly handling and field transients. |
Applications
| Wearable Health Monitor | IoT Edge Sensor Node |
|---|---|
|
Use Scenario: Continuous ECG/PPG sensing using ultra-low-power MCU and analog front-end, powered by CR2032 coin cell. IC Role / Device Role / Timing Role: Primary 1.85V supply for MCU core and ADC reference, enabled only during measurement bursts. Use Value: 0.25µA quiescent current extends battery life to 7+ years; active discharge prevents leakage into disabled analog circuits during sleep. |
Use Scenario: Battery-powered environmental sensor (temp/humidity/pressure) transmitting data via BLE every 5 minutes. IC Role / Device Role / Timing Role: Stable 1.85V rail for BLE SoC and digital sensors during active transmit/receive cycles. Use Value: 0.32V dropout allows operation until battery drops to 2.17V, capturing full Li-ion discharge curve; EN pin synchronizes with BLE wake-up signal. |
| Smart Camera Module | Industrial Wireless Transmitter |
|
Use Scenario: Miniaturized camera module in AR glasses with motion-triggered image capture. IC Role / Device Role / Timing Role: Power source for image sensor and ISP, enabled only during frame capture to minimize heat and power draw. Use Value: Active discharge clears VOUT within 1ms after capture ends, preventing ghost images caused by residual sensor bias voltage. |
Use Scenario: DIN-rail mounted wireless transmitter collecting vibration data from motors in harsh industrial settings. IC Role / Device Role / Timing Role: Regulated 1.85V supply for microcontroller and RF transceiver, operating from wide-input 3.3–24V DC-DC output. Use Value: 2.0–5.25V input range accommodates upstream DC-DC ripple; ±1% accuracy maintains RF PLL stability across temperature. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AP7361D-1850F4-7 | Higher output current (300mA), same 1.85V output, identical X2-WLB0606-4 package and discharge function. | Suitable where peak load exceeds 150mA (e.g., driving multiple sensors simultaneously). | Select if future design scaling requires headroom beyond 150mA while retaining footprint and discharge capability. |
| MCP1703T-1852E/MB | 150mA, 1.85V, no active discharge; SOT-23-5 package (2.9mm × 1.6mm); 1.8µA IQ. | Larger footprint and higher quiescent current make it less suitable for space-constrained, multi-year battery designs. | Choose only if board layout cannot accommodate WLCSP or if discharge functionality is unnecessary and cost is primary driver. |
Compared with AP7350D-185CF4-7, the AP7361D-1850F4-7 offers double the current capacity in the same ultra-small package but at higher cost, while the MCP1703T-1852E/MB trades size and IQ efficiency for broader distributor availability and simpler assembly-making it viable only when discharge and miniaturization are non-critical.
Availability
AP7350D-185CF4-7 is available at Aetrix Electronics and suitable for wearable electronics, IoT sensor modules, and wireless communication devices requiring stable component supply, long-term lifecycle support, and guaranteed traceability.
Supply support for AP7350D-185CF4-7 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-efficiency power management, signal integrity, and protection solutions for consumer, industrial, and automotive markets.
The AP7350 series belongs to Diodes' ultra-low-IQ LDO portfolio, engineered specifically for energy-harvesting and battery-operated edge devices where micropower efficiency and miniature packaging are mandatory design constraints.
FAQ
What is the minimum input voltage required for AP7350D-185CF4-7 to maintain regulation at full 150mA load?
The minimum input voltage is calculated as VOUT + VDROPOUT = 1.85V + 0.32V = 2.17V. At 150mA and +25°C, the device sustains regulation down to 2.17V input; below this, output voltage drops nonlinearly. The absolute minimum VIN rating is 2.0V, but regulation is not guaranteed below 2.17V under full load.
Can the EN pin be left unconnected if always-on operation is desired?
No-EN must never be left floating. For permanent enable, tie EN directly to VIN using a short trace or 0Ω resistor. A floating EN pin causes unpredictable regulator behavior due to noise coupling and undefined logic state, potentially leading to intermittent dropout or excessive current draw.
How does the active discharge feature affect system power sequencing?
The active discharge path (35Ω typical) pulls VOUT to GND within 1ms after EN goes low, ensuring downstream circuits lose power faster than upstream supplies. This prevents back-feeding, avoids latch-up in mixed-voltage ICs, and satisfies strict power-down timing requirements in systems with multiple regulated rails.
Is AP7350D-185CF4-7 qualified for automotive applications?
No-this specific part is not AEC-Q100 qualified. Diodes offers automotive-grade variants (e.g., AP7350DQ-185CF4-7) with PPAP documentation, IATF 16949 manufacturing, and extended temperature screening (-40°C to +125°C). Standard AP7350D-185CF4-7 is rated for -40°C to +85°C ambient and intended for commercial/industrial use only.
AP7350D-185CF4-7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- *
- Package/Case:
- 4-XFBGA, WLBGA
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Output Configuration:
- Positive
- Output Type:
- Fixed
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 5.25V
- Voltage - Output (Min/Fixed):
- 1.85V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.58V @ 150mA
- Current - Output:
- 150mA
- Current - Quiescent (Iq):
- 700 nA
- Current - Supply (Max):
- -
- PSRR:
- -
- Control Features:
- Current Limit, Enable
- Protection Features:
- Over Current
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- X2-WLB0606-4
AP7350D-185CF4-7 FAQ
1.How can I place an order for AP7350D-185CF4-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP7350D-185CF4-7 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 AP7350D-185CF4-7 reliable?
The price and inventory of AP7350D-185CF4-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP7350D-185CF4-7 is usually 5 days.
3.What payment methods are accepted for AP7350D-185CF4-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP7350D-185CF4-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP7350D-185CF4-7?
AP7350D-185CF4-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP7350D-185CF4-7 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 AP7350D-185CF4-7?
For technical support, including AP7350D-185CF4-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP7350D-185CF4-7 requirements.
6.How does Aetrix verify that AP7350D-185CF4-7 is sourced from the original manufacturer or authorized distributors?
All AP7350D-185CF4-7 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 AP7350D-185CF4-7 meets industry standards.
7.What is the process for return or replacement of AP7350D-185CF4-7?
All AP7350D-185CF4-7 units undergo pre-shipment inspection (PSI). If there is an issue with AP7350D-185CF4-7, 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 AP7350D-185CF4-7 part is unused and in its original packaging.
Return procedure for AP7350D-185CF4-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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