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Diodes Incorporated AP7375-30SA-7
- Part No.:
- AP7375-30SA-7
- Manufacturer:
- Diodes Incorporated
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
AP7375-30SA-7.pdf
- Description:
- IC REG LIN 3V 300MA SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:6,053
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Product details
Overview
AP7375-30SA-7 from Diodes Incorporated is a 3.0V fixed-output, wide-input (3–45V), 300mA ultra-low-dropout linear regulator in SOT23-3 package with 2.1μA quiescent current, 35mV dropout at 10mA, and integrated enable (EN) pin rated to 45V - deployed in battery-powered smoke detectors and microcontroller power rails where input voltage varies widely and standby power must be minimized.
For engineers reviewing the AP7375-30SA-7 datasheet, AP7375-30SA-7 pinout, AP7375-30SA-7 application, or AP7375-30SA-7 equivalent, key selection criteria include its 45V EN tolerance, ±2% output accuracy across load/temperature, fast transient response without overshoot, thermal shutdown behavior, and compatibility with 1μF ceramic input and 10μF ceramic output capacitors.
Technical Context
The AP7375-30SA-7 employs a PMOS pass transistor architecture enabling true ultra-low dropout (35mV @ 10mA) and reverse-polarity safe operation. Its EN pin accepts up to 45V directly, eliminating external level-shifting circuitry when interfacing with high-voltage supply rails.
Internal protection includes foldback current limiting (500mA typical limit), thermal shutdown at +150°C with +20°C hysteresis, and robust line/load transient immunity - demonstrated by <10mV AC ripple under 10→100mA load steps and no overshoot during startup or short-circuit recovery.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 3.0V ±2% - ensures stable MCU core or sensor biasing without external feedback network. |
| Input Voltage Range | 3.0V to 45V - supports direct connection to automotive batteries, industrial 24V rails, or multi-cell Li-ion packs. |
| Max Output Current | 300mA continuous - sufficient for low-power microcontrollers (e.g., ARM Cortex-M0+), sensors, and RF transceivers. |
| Dropout Voltage | 35mV @ 10mA / 350mV @ 100mA - enables regulation down to VIN = VOUT + 0.35V at full load, preserving headroom in low-VIN scenarios. |
| Quiescent Current | 2.1μA typical - extends battery life in always-on smoke detectors and wireless sensor nodes operating >10 years on coin cells. |
| PSRR | 85dB @ 1kHz - suppresses switching noise from upstream DC-DC converters feeding the LDO input. |
| Enable Pin Voltage | EN high threshold = 1V min, low threshold = 0.4V max - compatible with 1.8V/3.3V GPIOs and tolerant of 45V system rails. |
Pinout & Package
SOT23-3 package (Package Code: SA), 3-pin surface-mount, 2.9mm × 1.3mm footprint, 1.45mm height, with exposed pad not present - optimized for space-constrained PCBs in portable and safety-critical equipment.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (VIN) | Input voltage supply | Accepts 3–45V DC; requires 1μF ceramic decoupling capacitor placed adjacent to pin. |
| 2 (GND) | Ground reference | Primary return path for load current and internal bias; must connect to low-impedance ground plane. |
| 3 (VOUT) | Regulated output | Delivers stable 3.0V ±2%; requires 10μF ceramic output capacitor with X7R/X5R dielectric near pin. |
Key Features
| Feature | Design Value |
|---|---|
| Wide VIN range with 45V-tolerant EN | Enables single-LDO power management across 12V/24V/48V systems without external resistive dividers or MOSFET switches. |
| No-overshoot startup & recovery | Guarantees clean power sequencing for sensitive analog sensors and flash-memory-based MCUs during brown-out or short-circuit events. |
| Thermal shutdown with hysteresis | +150°C trip point and +20°C hysteresis prevent thermal cycling damage during sustained overload or poor heatsinking. |
| Lead-free, halogen-free, RoHS 3 compliant | Meets IPC-J-STD-020 moisture sensitivity Level 1 and automotive end-of-life compliance requirements. |
Applications
| Smoke Detector Power Supply | Industrial Microcontroller Rail |
|---|---|
|
Use Scenario: Primary 3.0V rail for electrochemical CO sensor, MCU, and RF transmitter in battery-backed residential smoke alarm. IC Role / Device Role / Timing Role: Main LDO delivering regulated 3.0V to MCU core, ADC reference, and sensor interface - active 24/7 with sub-μA sleep current. Use Value: 2.1μA quiescent current enables >10-year battery life on CR123A; 45V EN tolerance allows direct connection to 36V backup supply during mains failure. |
Use Scenario: Local 3.0V supply for ARM Cortex-M4 MCU in programmable logic controller (PLC) I/O module powered from 24V DC field bus. IC Role / Device Role / Timing Role: Point-of-load regulator converting noisy 24V field bus to clean 3.0V for digital logic and communication peripherals. Use Value: 85dB PSRR at 1kHz attenuates switching noise from upstream 24V buck converter; 300mA capacity supports full-speed USB and Ethernet PHY operation. |
| Smart Appliance Sensor Hub | Low-Power Wireless Node |
|
Use Scenario: Powering temperature/humidity sensor array and BLE SoC in Wi-Fi-enabled refrigerator control board with variable input from 12V SMPS. IC Role / Device Role / Timing Role: Secondary LDO providing isolated 3.0V domain for analog front-end and radio subsystem - enabled only during measurement cycles. Use Value: Fast load transient response (<200μs settling) prevents sensor reading corruption during BLE transmit bursts; ±2% accuracy ensures calibrated ADC performance. |
Use Scenario: Energy-harvesting node using solar cell + supercapacitor, requiring ultra-low-IQ regulation for LoRaWAN transceiver and environmental sensors. IC Role / Device Role / Timing Role: Standby LDO maintaining 3.0V rail during deep-sleep mode, activated only for periodic sensor reads and radio transmission. Use Value: 35mV dropout at 10mA allows operation down to 3.035V input - critical for maximizing usable energy from partially discharged supercapacitors. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ultra-low-IQ, wide-VIN LDO applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AP7361-30SA-7 | Lower max current (150mA), higher IQ (3.5μA), same 3–45V VIN, identical SOT23-3 package. | Suitable only for sub-150mA loads; less margin for peak MCU+radio current. | Select if cost sensitivity outweighs current headroom and 1.4μA IQ advantage. |
| MCP1703T-3002E/MB | 4.5–24V VIN range, 250mA, 2.0μA IQ, SOT23-3, but EN pin limited to 6V - requires external resistor divider for >6V systems. | Not viable for direct 24V/45V EN interface; lacks overvoltage-safe enable functionality. | Choose only in low-VIN (<6V EN) designs where Diodes' 45V EN capability is unnecessary. |
Compared with AP7375-30SA-7, AP7361-30SA-7 trades 150mA current and +1.4μA IQ for lower cost, while MCP1703T-3002E/MB sacrifices wide-VIN EN robustness for marginally lower IQ - making AP7375-30SA-7 uniquely suited for high-reliability, high-VIN industrial and safety-critical LDO roles.
Availability
AP7375-30SA-7 is available at Aetrix Electronics and suitable for battery-powered equipment, smoke detectors and sensors, microcontroller applications, and home appliances requiring stable component supply across extended temperature (-40°C to +85°C) and long-lifecycle deployments.
Supply support for AP7375-30SA-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, automotive, and consumer markets.
The AP7375 series belongs to Diodes' Ultra-Low-IQ LDO product line, engineered specifically for energy-sensitive applications demanding wide input range, fast transient response, and robust fault protection - including safety-critical battery-operated systems.
FAQ
What is the minimum input voltage required for regulation at 3.0V output?
The AP7375-30SA-7 requires VIN ≥ VOUT + VDROP(MAX). At 100mA load, VDROP is 360mV max, so minimum VIN is 3.36V. At light loads (10mA), VDROP drops to 50mV max, allowing regulation down to 3.05V. Below 3.0V, the device cannot regulate and enters dropout.
Can the EN pin be left floating, or must it be pulled high/low?
The EN pin must never be left floating. It has no internal pull-up/down. To ensure reliable startup, connect EN to VIN via a 100kΩ resistor or drive actively with a GPIO. For guaranteed disable, tie EN to GND through ≤10kΩ. Floating EN may cause erratic enable/disable behavior due to noise coupling.
Is an external bypass capacitor required on the VOUT pin?
Yes - a minimum 10μF X7R/X5R ceramic capacitor is mandatory for stability and transient performance. The datasheet specifies 10μF as the recommended value; using less risks oscillation or excessive undershoot during load steps. Place it within 2mm of VOUT and GND pins.
Does AP7375-30SA-7 support reverse polarity protection?
No - the AP7375-30SA-7 lacks built-in reverse polarity protection. Applying negative voltage to VIN relative to GND violates Absolute Maximum Ratings (−0.3V limit) and may cause permanent damage. External protection (e.g., series Schottky diode or ideal diode controller) is required in reverse-voltage-prone environments.
AP7375-30SA-7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- AP7375
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Output Configuration:
- Positive
- Output Type:
- Fixed
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 45V
- Voltage - Output (Min/Fixed):
- 3V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.36V @ 100mA
- Current - Output:
- 300mA
- Current - Quiescent (Iq):
- 5 µA
- Current - Supply (Max):
- -
- PSRR:
- -
- Control Features:
- Current Limit
- Protection Features:
- Over Current, Over Temperature, Short Circuit
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
AP7375-30SA-7 FAQ
1.How can I place an order for AP7375-30SA-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP7375-30SA-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 AP7375-30SA-7 reliable?
The price and inventory of AP7375-30SA-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP7375-30SA-7 is usually 5 days.
3.What payment methods are accepted for AP7375-30SA-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP7375-30SA-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP7375-30SA-7?
AP7375-30SA-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP7375-30SA-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 AP7375-30SA-7?
For technical support, including AP7375-30SA-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP7375-30SA-7 requirements.
6.How does Aetrix verify that AP7375-30SA-7 is sourced from the original manufacturer or authorized distributors?
All AP7375-30SA-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 AP7375-30SA-7 meets industry standards.
7.What is the process for return or replacement of AP7375-30SA-7?
All AP7375-30SA-7 units undergo pre-shipment inspection (PSI). If there is an issue with AP7375-30SA-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 AP7375-30SA-7 part is unused and in its original packaging.
Return procedure for AP7375-30SA-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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