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Diodes Incorporated AP7370-50SA-7
- Part No.:
- AP7370-50SA-7
- Manufacturer:
- Diodes Incorporated
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
AP7370-50SA-7.pdf
- Description:
- IC REG LINEAR 5V 300MA SOT23
- Quantity:
- Payment:
- Shipping:
Inventory:5,713
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Product details
Overview
AP7370-50SA-7 from Diodes Incorporated is a 5.0V fixed-output, 300mA ultra-low dropout (ULDO) linear regulator in SOT23 package, featuring 18V max input voltage, 450mV dropout at 100mA, ±1% output accuracy, and reverse current protection - deployed in portable instrumentation and battery-powered metering systems.
For engineers reviewing the AP7370-50SA-7 datasheet, AP7370-50SA-7 pinout, AP7370-50SA-7 application, or AP7370-50SA-7 equivalent, key selection criteria include dropout performance at 300mA load, thermal resistance in SOT23 (205°C/W), compatibility with 1µF ceramic output capacitors, and suitability for 3.2–18V input rails in space-constrained designs.
Technical Context
The AP7370-50SA-7 integrates a precision voltage reference, error amplifier, and current-limit circuit to maintain regulation across wide input (3.2–18V) and load (0–300mA) ranges. Its internal architecture enables stable operation with low-ESR ceramic capacitors and includes thermal shutdown triggered at +160°C with +20°C hysteresis.
Reverse current protection prevents backflow when VOUT > VIN, critical for multi-rail systems. The device operates over –40°C to +125°C junction temperature and achieves ±100ppm/°C output voltage drift, supporting high-accuracy analog front-ends in weighing scales and portable test equipment.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 5.0V ±1% - ensures stable MCU core or sensor bias supply without external feedback network |
| Max Input Voltage | 18V - supports direct connection to unregulated 12V or 15V rails in industrial portable gear |
| Dropout Voltage | 450mV @ 100mA - enables 5.0V output from 5.45V input, minimizing power loss in battery discharge phase |
| Quiescent Current | 1.5–2.5µA - extends battery life in always-on metering applications with microamp-level standby draw |
| Thermal Resistance θJA | 205°C/W (SOT23) - defines maximum power dissipation limit (≈250mW) before thermal shutdown activates |
| Line Regulation | 0.05%/V - maintains <±0.25mV output shift per volt input change, critical for precision ADC references |
| Load Regulation | 0.5% - guarantees ≤25mV output deviation from 1mA to 300mA load, suitable for dynamic sensor loads |
Pinout & Package
SOT23-3 package: 1.9mm × 2.9mm × 1.1mm body, surface-mount, RoHS-compliant, with exposed pad not present (no EP).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VIN | Main input supply terminal; accepts 3.2–18V; requires local 1µF ceramic decoupling |
| 2 | GND | Analog ground reference; must be low-impedance connection to minimize noise coupling into error amplifier |
| 3 | VOUT | Regulated 5.0V output; drives load up to 300mA; stable with ≥1µF ceramic capacitor |
Key Features
| Feature | Design Value |
|---|---|
| Wide Input Range (3.2–18V) | Eliminates need for pre-regulation in multi-battery or adapter-powered devices like handheld multimeters |
| Ultra-Low Quiescent Current (1.5µA) | Reduces standby power loss to <7.5µW at 5V, enabling >1-year battery life in low-duty-cycle weighing scales |
| Reverse Current Protection | Blocks current flow from VOUT to VIN during brown-out or hot-swap events, preventing system backfeeding |
| Thermal Shutdown with Hysteresis | Shuts down at +160°C and re-enables only after cooling to +140°C, preventing oscillatory tripping under sustained overload |
| Low-ESR Ceramic Cap Compatibility | Stable with standard 1µF X5R/X7R MLCCs - avoids cost and size penalty of tantalum or electrolytic capacitors |
Applications
| Portable Weighing Scales | Battery-Powered Multimeters |
|---|---|
Use Scenario: Compact handheld scale operating from two AA cells (1.8–3.2V) with boost converter feeding AP7370-50SA-7 for 5V sensor and display rail. IC Role / Device Role / Timing Role: Primary 5V LDO regulator supplying load cell signal conditioner and LCD controller. Use Value: 450mV dropout allows full-scale operation down to 3.2V input, extending usable battery range by 18% versus 600mV-drop alternatives. |
Use Scenario: Autoranging digital multimeter using Li-ion battery (3.0–4.2V) and 5V rail for ADC, op-amps, and backlight driver. IC Role / Device Role / Timing Role: Precision 5V supply for 16-bit SAR ADC reference and analog front-end amplifiers. Use Value: ±1% output accuracy and 0.05%/V line regulation ensure <±0.5 LSB measurement error across battery discharge cycle. |
| Laptop Peripheral Adapters | Industrial Handheld Meters |
Use Scenario: USB-C powered USB-to-RS485 adapter drawing 5V from PD source, requiring clean 5V for transceiver IC and isolation logic. IC Role / Device Role / Timing Role: Post-regulator cleaning noisy 5V PD rail before RS485 PHY and isolated UART interface. Use Value: Low ground current (2.5µA max at 300mA) minimizes shared-ground noise injection into sensitive differential receivers. |
Use Scenario: Intrinsically safe gas detector with 3.6V Li-SOCl₂ primary battery and 5V rail for electrochemical sensor bias and microcontroller. IC Role / Device Role / Timing Role: Primary regulated supply enabling low-power sleep mode and fast wake-up response. Use Value: Thermal shutdown + reverse current protection prevent fault propagation during sensor short-circuit or battery reversal events. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ULDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MCP1703T-5002E/MB | 5.0V, 250mA, 600mV dropout @ 100mA, 3µA IQ, SOT23-3 | Lower current rating and higher dropout reduce headroom in 5.45V min-input designs | Select if lower cost is prioritized and load stays ≤250mA with ≥5.6V input margin |
| TPS7A2050PDBVR | 5.0V, 300mA, 175mV dropout @ 100mA, 6.5µA IQ, SOT23-5 | Lower dropout and higher IQ; requires 5-pin layout and separate enable control | Choose for ultra-low dropout in 5.2V input systems where board space allows 5-pin footprint |
Compared with MCP1703T-5002E/MB, AP7370-50SA-7 delivers 50mA higher current and 150mV lower dropout - critical for marginal input conditions. Versus TPS7A2050PDBVR, it trades 275mV higher dropout for simpler 3-pin integration and 5× lower quiescent current, favoring battery longevity over minimal voltage overhead.
Availability
AP7370-50SA-7 is available at Aetrix Electronics and suitable for portable instrumentation, battery-powered test equipment, and industrial handheld meters requiring stable component supply with long-term manufacturability assurance.
Supply support for AP7370-50SA-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 solutions, with design centers across Asia, Europe, and the US.
The AP7370 series targets space-constrained, battery-sensitive applications demanding wide-input, low-quiescent-current regulation - specifically engineered for portable instrumentation, medical handhelds, and industrial data loggers.
FAQ
Is AP7370-50SA-7 recommended for new designs?
No - Diodes Incorporated explicitly marks AP7370 as "NOT RECOMMENDED FOR NEW DESIGN" and recommends AP7375 for future projects. AP7370-50SA-7 remains available for legacy support and existing production, but lacks long-term roadmap commitment. Designers initiating new products should evaluate AP7375 or alternative ULDOs with active product status.
What is the minimum input voltage required for regulation at 5.0V output?
The AP7370-50SA-7 requires VIN ≥ 3.2V to maintain regulation, per Recommended Operating Conditions. At 100mA load, dropout is 450mV, so minimum functional VIN = 5.0V + 0.45V = 5.45V. Below that, output drops linearly; the 3.2V absolute minimum applies only at very light loads (<1mA) and elevated temperatures.
Can AP7370-50SA-7 drive a 300mA load continuously in SOT23 package?
Yes, but thermal limits apply: with θJA = 205°C/W, 300mA at 5V output with 12V input yields ~2.1W dissipation, raising junction temperature by ~430°C - exceeding 150°C rating. Continuous 300mA operation requires PCB copper area ≥4 cm² or forced airflow. For sustained 300mA, derating to ≤150mA in still air is advised.
Does AP7370-50SA-7 require an input capacitor?
Yes - a minimum 1.0µF ceramic capacitor is required at VIN per Electrical Characteristics test conditions. This stabilizes input impedance, suppresses switching noise from upstream converters, and prevents oscillation during transient load steps. X5R or X7R dielectrics are recommended; placement within 3mm of VIN/GND pins is critical for EMI control.
AP7370-50SA-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):
- 5V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.55V @ 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
AP7370-50SA-7 FAQ
1.How can I place an order for AP7370-50SA-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP7370-50SA-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 AP7370-50SA-7 reliable?
The price and inventory of AP7370-50SA-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP7370-50SA-7 is usually 5 days.
3.What payment methods are accepted for AP7370-50SA-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP7370-50SA-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP7370-50SA-7?
AP7370-50SA-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP7370-50SA-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 AP7370-50SA-7?
For technical support, including AP7370-50SA-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP7370-50SA-7 requirements.
6.How does Aetrix verify that AP7370-50SA-7 is sourced from the original manufacturer or authorized distributors?
All AP7370-50SA-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 AP7370-50SA-7 meets industry standards.
7.What is the process for return or replacement of AP7370-50SA-7?
All AP7370-50SA-7 units undergo pre-shipment inspection (PSI). If there is an issue with AP7370-50SA-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 AP7370-50SA-7 part is unused and in its original packaging.
Return procedure for AP7370-50SA-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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