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Diodes Incorporated AP7370-30SA-7
- Part No.:
- AP7370-30SA-7
- Manufacturer:
- Diodes Incorporated
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
AP7370-30SA-7.pdf
- Description:
- IC REG LINEAR 3V 300MA SOT23
- Quantity:
- Payment:
- Shipping:
Inventory:2,530
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Product details
Overview
AP7370-30SA-7 from Diodes Incorporated is a 3.0V fixed-output, 300mA ultra-low dropout (ULDO) linear regulator in SOT23 package, featuring 500mV dropout at 100mA, ±1% output voltage accuracy over load/temperature, and 1.5µA quiescent current at zero load - designed for power management in battery-powered portable instrumentation and USB-powered devices.
For engineers reviewing the AP7370-30SA-7 datasheet, AP7370-30SA-7 pinout, AP7370-30SA-7 application, or AP7370-30SA-7 equivalent, key selection criteria include input voltage range (3.2–18V), thermal shutdown threshold (+160°C), reverse current protection, compatibility with low-ESR ceramic capacitors, and SOT23 footprint constraints for space-constrained designs.
Technical Context
The AP7370-30SA-7 integrates a precision voltage reference, error amplifier, resistor network for fixed 3.0V output, current-limit circuit (350mA min), chip enable logic, and thermal shutdown circuitry. Its architecture supports stable regulation under fast load transients and maintains reverse current blocking when VOUT > VIN.
It operates across –40°C to +125°C junction temperature, delivers ±0.5% load regulation (1mA–300mA), and achieves 0.05%/V line regulation - enabled by internal compensation optimized for 1µF input/output ceramic capacitors without external components.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 3.0V ±1% (ensures stable MCU core or sensor bias under full load and temperature) |
| Max Input Voltage | 18V (supports wide-input industrial USB-C PD adapters and multi-cell battery inputs) |
| Dropout Voltage | 500mV @ 100mA (enables 3.0V output from 3.5V sources, e.g., single Li-ion at end-of-discharge) |
| Quiescent Current | 1.5µA @ IOUT = 0A (extends battery life in always-on metering and weighing scale standby modes) |
| Current Limit | 350mA min (protects against short-circuit while sustaining 300mA continuous output) |
| Thermal Shutdown | +160°C with +20°C hysteresis (prevents latch-up during sustained overload in sealed enclosures) |
| Reverse Current Protection | Active (blocks >1µA reverse current when VOUT > VIN, critical for backup-supply isolation) |
Pinout & Package
SOT23-3 package: 1.30mm × 2.40mm × 0.915mm body, surface-mount, RoHS-compliant, no intentionally added lead.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VIN | Main input supply connection; accepts 3.2–18V; requires local 1µF ceramic decoupling |
| 2 | GND | Power ground reference; must be low-impedance path to minimize noise and dropout error |
| 3 | VOUT | Regulated 3.0V output; stable with 1µF ceramic capacitor; reverse-current protected |
Key Features
| Feature | Design Value |
|---|---|
| Wide input range (3.2–18V) | Supports direct connection to unregulated wall adapters, automotive USB ports, and multi-cell battery stacks without pre-regulation |
| Ultra-low IQ (1.5µA) | Reduces standby power loss to <4.5nW per µA - critical for coin-cell–powered portable instruments |
| Low-ESR capacitor compatible | Stable with 1µF X5R/X7R ceramics; eliminates need for costly tantalum or aluminum electrolytics |
| Reverse current protection | Prevents backfeed from VOUT to VIN during hot-swap or dual-supply sequencing - no external diode required |
| Thermal shutdown + hysteresis | Auto-recovery after cooldown avoids system lockup in thermally constrained handheld enclosures |
Applications
| Portable Weighing Scales | Metering Data Loggers |
|---|---|
Use Scenario: Battery-powered digital scales operating on two AA cells (2.4–3.2V) with LCD and microcontroller. IC Role / Device Role / Timing Role: Primary 3.0V LDO supplying MCU, ADC, and display driver from varying battery voltage. Use Value: 500mV dropout enables full-scale operation down to 2.5V battery voltage; 1.5µA IQ extends shelf life beyond 2 years. |
Use Scenario: Industrial energy meter with isolated RS-485 interface and real-time clock, powered by 3.7V Li-ion. IC Role / Device Role / Timing Role: Clean 3.0V rail for metrology ADC and RTC, isolated from noisy communication circuitry. Use Value: ±1% output accuracy ensures consistent ADC reference; reverse current protection prevents RTC backup drain during main power loss. |
| USB-Powered Test Instruments | Laptop Peripheral Modules |
Use Scenario: Handheld multimeter drawing power from USB 2.0 (4.75–5.25V) with analog front-end and Bluetooth LE radio. IC Role / Device Role / Timing Role: Low-noise 3.0V supply for precision op-amps and BLE SoC, decoupled from USB bus ripple. Use Value: 0.05%/V line regulation rejects USB voltage sag during high-current transfers; thermal shutdown protects during enclosure overheating. |
Use Scenario: ExpressCard or USB-C expansion module (e.g., CAN interface) requiring regulated 3.0V from laptop's 5V or 12V rail. IC Role / Device Role / Timing Role: Point-of-load regulator converting host-supplied voltage to clean 3.0V for FPGA I/O banks and transceivers. Use Value: 18V max input accommodates 12V auxiliary rails; SOT23 footprint fits tight PCB layouts near edge connectors. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ULDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MCP1700T-3002E/MB | 300mA, 6µA IQ, 1.6V–6V input, 3.0V ±2% output, SOT23-3 | Limited to 6V input; lacks reverse current protection and thermal hysteresis | Use only where input never exceeds 6V and reverse feed is impossible (e.g., dedicated battery rail) |
| TPS70630DBVR | 200mA, 1.7µA IQ, 2.7–6.5V input, 3.0V ±1%, SOT23-5 (with EN) | Lower current rating; requires external enable control; no reverse current blocking | Choose if enable functionality is needed and load ≤200mA; not suitable for >6.5V inputs or reverse-isolation use cases |
Compared with MCP1700T-3002E/MB and TPS70630DBVR, AP7370-30SA-7 uniquely combines 18V input tolerance, reverse current blocking, and 300mA capability in SOT23 - making it the only option for USB-C PD-powered peripherals or multi-cell battery systems requiring compact, robust, and isolation-capable regulation.
Availability
AP7370-30SA-7 is available at Aetrix Electronics and suitable for portable weighing scales, USB-powered test instruments, and battery-backed metering data loggers requiring stable component supply with long-term lifecycle support.
Supply support for AP7370-30SA-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 semiconductor company specializing in discrete, analog, and mixed-signal ICs for power management, signal integrity, and connectivity applications.
The AP7370 series belongs to Diodes' high-voltage ULDO regulator product line, engineered specifically for portable and instrumentation applications demanding wide-input operation, ultra-low quiescent current, and robust protection features in minimal footprints.
FAQ
What is the minimum input voltage required for AP7370-30SA-7 to regulate 3.0V output?
The AP7370-30SA-7 requires VIN ≥ 3.2V to maintain regulation, as specified in Recommended Operating Conditions. This accounts for worst-case dropout (600mV) and ensures stable 3.0V output across temperature and load - for example, it functions reliably with a single Li-ion cell at 3.3V nominal but not below 3.2V under full 300mA load.
Does AP7370-30SA-7 require an external bypass capacitor on VOUT?
Yes - a minimum 1.0µF ceramic capacitor (X5R/X7R) is required on VOUT for stability and transient response, as confirmed in Electrical Characteristics test conditions and Typical Applications Circuit. Omitting it risks oscillation or excessive output ripple, especially under dynamic load changes typical in portable instrumentation.
Can AP7370-30SA-7 be used in automotive applications?
No - AP7370-30SA-7 is not AEC-Q200 qualified and its operating junction temperature range (–40°C to +125°C) does not meet automotive ambient requirements. While it survives +125°C junction, it lacks automotive-grade screening, qualification testing, and guaranteed PPAP documentation required for under-hood or infotainment systems.
Is the SOT23 package of AP7370-30SA-7 thermally adequate for 300mA continuous output?
Yes - with θJA = 205°C/W and maximum power dissipation of ~150mW at 300mA (VIN = 5.3V), junction rise is ~31°C above ambient, well within the +125°C limit. However, PCB copper area and airflow must follow Diodes' suggested pad layout (DS41820 p.15) to sustain this performance reliably.
AP7370-30SA-7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- 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):
- 18V
- Voltage - Output (Min/Fixed):
- 3V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.6V @ 100mA
- Current - Output:
- 300mA
- Current - Quiescent (Iq):
- 2.5 µA
- Current - Supply (Max):
- 300 µA
- PSRR:
- -
- Control Features:
- -
- Protection Features:
- Over Current, Over Temperature, Reverse Current, Short Circuit
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
AP7370-30SA-7 FAQ
1.How can I place an order for AP7370-30SA-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP7370-30SA-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 AP7370-30SA-7 reliable?
The price and inventory of AP7370-30SA-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP7370-30SA-7 is usually 5 days.
3.What payment methods are accepted for AP7370-30SA-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP7370-30SA-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP7370-30SA-7?
AP7370-30SA-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP7370-30SA-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 AP7370-30SA-7?
For technical support, including AP7370-30SA-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP7370-30SA-7 requirements.
6.How does Aetrix verify that AP7370-30SA-7 is sourced from the original manufacturer or authorized distributors?
All AP7370-30SA-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 AP7370-30SA-7 meets industry standards.
7.What is the process for return or replacement of AP7370-30SA-7?
All AP7370-30SA-7 units undergo pre-shipment inspection (PSI). If there is an issue with AP7370-30SA-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 AP7370-30SA-7 part is unused and in its original packaging.
Return procedure for AP7370-30SA-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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