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Diodes Incorporated AP7370-28SA-7
- Part No.:
- AP7370-28SA-7
- Manufacturer:
- Diodes Incorporated
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
AP7370-28SA-7.pdf
- Description:
- IC REG LINEAR 2.8V 300MA SOT23
- Quantity:
- Payment:
- Shipping:
Inventory:5,963
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Product details
Overview
AP7370-28SA-7 from Diodes Incorporated is a fixed-output 2.8V, 300mA ultra-low dropout (ULDO) linear regulator in SOT23 package, featuring 500mV dropout at 100mA, ±1% output voltage accuracy (for VOUT > 2.5V), and 1.5–2.5µA quiescent current. It integrates reverse current protection, thermal shutdown, and short-circuit current limiting, targeting power rails in portable instrumentation and battery-powered USB peripherals.
For engineers reviewing the AP7370-28SA-7 datasheet, AP7370-28SA-7 pinout, AP7370-28SA-7 application, or AP7370-28SA-7 equivalent, this page delivers verified electrical specs, SOT23 terminal mapping, real-world use cases in metering and portable computing, and validated alternative options for supply continuity planning.
Technical Context
The AP7370-28SA-7 employs a precision bandgap reference and error amplifier to regulate output against line/load variations, with dropout behavior defined only for VOUT ≥ 2.8V per datasheet Note 6. Its internal current limit is 350mA (min) for VOUT > 2.5V, and thermal shutdown activates at +160°C with +20°C hysteresis.
Designed for low-ESR ceramic capacitors (1.0µF min), it achieves 0.05%/V line regulation and 0.5% load regulation across -40°C to +125°C junction temperature. Reverse current is blocked below 1µA up to VOUT = 5V, ensuring no backfeed during input brownout.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 2.8V ±1% (99–101% tolerance), enabling stable bias for 2.8V logic or analog sensors without external feedback. |
| Max Input Voltage | 18V absolute max; supports wide-input applications like automotive accessory rails or multi-cell battery inputs. |
| Dropout Voltage | 500mV @ 100mA (typ), allowing regulation from 3.3V input down to 2.8V output - critical for single-cell Li-ion or LiFePO₄ systems. |
| Quiescent Current | 1.5–2.5µA @ zero load, minimizing standby power loss in always-on metering or IoT edge nodes. |
| Current Limit | 350mA minimum trip threshold, providing robust short-circuit protection without external current-sense circuitry. |
| Thermal Shutdown | Activates at +160°C with +20°C hysteresis, preventing latch-up during sustained overload or poor PCB heatsinking. |
| Reverse Current | <1µA up to 5V output, eliminating need for external blocking diode in backup power or hot-swap configurations. |
Pinout & Package
SOT23-3 package (JEDEC TO-236AB), 2.9mm × 1.3mm footprint, 0.95mm height, with gull-wing leads and exposed pad not present (no EP).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VIN | Main input supply connection; accepts 3.2–18V DC; requires local 1µF ceramic decoupling. |
| 2 | GND | Analog/digital ground reference; must be low-impedance path to system ground plane. |
| 3 | VOUT | Regulated 2.8V output; connects directly to load; requires 1µF ceramic capacitor to GND. |
Key Features
| Feature | Design Value |
|---|---|
| Wide Input Range | Operates from 3.2V to 18V VIN, supporting legacy 12V rails and modern low-voltage battery sources without redesign. |
| Ultra-Low IQ | 1.5–2.5µA ground current at no load enables >10-year battery life in coin-cell–powered weighing scales. |
| Reverse Current Protection | Blocks backflow below 1µA, removing need for series Schottky diode and saving BOM cost and board space. |
| Thermal + Short-Circuit Protection | Integrated shutdown and current limiting prevent damage during transient overloads or PCB layout errors. |
| Ceramic Capacitor Compatible | Stable with 1.0µF X5R/X7R ceramics, avoiding costly tantalum or electrolytic capacitors and reducing ESR sensitivity. |
Applications
| Portable Weighing Scales | Metering Data Loggers |
|---|---|
Use Scenario: Battery-powered digital kitchen or industrial platform scales requiring microamp-level sleep current and stable 2.8V ADC reference. IC Role / Device Role / Timing Role: Primary LDO supplying 2.8V to 24-bit sigma-delta ADC and low-power MCU core. Use Value: 1.5µA quiescent current extends CR2032 battery life beyond 5 years in intermittent-use mode. |
Use Scenario: Smart utility meters capturing voltage/current waveforms with high-precision analog front-end. IC Role / Device Role / Timing Role: Clean 2.8V rail for metrology-grade ADC and isolated RS-485 transceiver bias. Use Value: ±1% output accuracy and 0.05%/V line regulation ensure <0.1% measurement drift across 10–18V input range. |
| Laptop USB Peripherals | Handheld Test Instruments |
Use Scenario: USB-powered oscilloscope probes or logic analyzers drawing burst currents up to 300mA. IC Role / Device Role / Timing Role: Local 2.8V regulator for FPGA I/O banks and high-speed serial PHYs. Use Value: 500mV dropout enables full 300mA delivery from 3.3V USB VBUS even under cable drop. |
Use Scenario: Portable multimeters and thermal imagers operating from single Li-ion cells (2.8–4.2V). IC Role / Device Role / Timing Role: Post-regulator converting variable battery voltage to fixed 2.8V for display driver and sensor interface. Use Value: Reverse current blocking prevents battery discharge when USB charging is active but main power is off. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ULDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AP7375-28SA-7 | Successor device; same pinout, 350mA current limit (vs 300mA), lower 300mV dropout @ 100mA, and improved PSRR. | Direct replacement where higher efficiency or tighter transient response is required; recommended for new designs. | Select AP7375-28SA-7 if designing new products - it supersedes AP7370 per Diodes' "NOT RECOMMENDED FOR NEW DESIGN" notice. |
| MCP1700T-2802E/TT | Microchip 2.8V LDO; 250mA rating, 1.6µA IQ, but only 6V max input and no reverse current protection. | Suitable for low-voltage embedded systems (e.g., 3.3V-only boards); unsuitable for 12V input or backfeed-sensitive topologies. | Choose MCP1700 only if input stays ≤6V and reverse blocking is handled externally; verify thermal performance at 250mA. |
Compared with AP7370-28SA-7, AP7375-28SA-7 offers superior dropout and current capability in identical SOT23 packaging, while MCP1700T-2802E/TT trades input voltage range and protection features for marginally lower IQ in cost-sensitive, low-VIN applications.
Availability
AP7370-28SA-7 is available at Aetrix Electronics and suitable for portable instrumentation, battery-powered USB peripherals, and handheld test equipment requiring stable component supply and long-lifecycle support.
Supply support for AP7370-28SA-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, with design centers across Asia, Europe, and the US.
The AP7370 series belongs to Diodes' high-reliability ULDO regulator product line, engineered specifically for space-constrained, battery-sensitive applications demanding ultra-low IQ and wide-input operation.
FAQ
Is AP7370-28SA-7 RoHS compliant and halogen-free?
Yes. AP7370-28SA-7 meets EU RoHS 2011/65/EU and RoHS 3 2015/863/EU directives, and is classified as Diodes' "Green" product: Br < 900ppm, Cl < 900ppm (Br+Cl < 1500ppm), and Sb < 1000ppm. Full compliance documentation is available on Diodes' quality portal.
What is the minimum input voltage required for regulation at 2.8V output?
The datasheet specifies a minimum input voltage of 3.2V for guaranteed operation. This ensures sufficient headroom above the 500mV typical dropout voltage, maintaining regulation across temperature, load, and process variation - critical for reliable startup from Li-ion batteries near end-of-discharge.
Can AP7370-28SA-7 drive a 300mA load continuously in SOT23 package?
Yes, but thermal derating applies. With θJA = 205°C/W and TJ(max) = +150°C, continuous 300mA at ambient 25°C requires ≤1.2W power dissipation. At 18V input → 2.8V output, power loss is 4.56W - exceeding safe limits. For 300mA, VIN must stay ≤7.5V to keep die temperature within spec without heatsinking.
Does AP7370-28SA-7 require an enable pin or external components to operate?
No. AP7370-28SA-7 is a three-terminal fixed-output regulator with no enable pin. It operates immediately upon applying valid VIN (≥3.2V) and requires only two external 1.0µF ceramic capacitors: one on VIN and one on VOUT. No resistors, feedback networks, or bypass components are needed.
AP7370-28SA-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):
- 2.8V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- -
- 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
AP7370-28SA-7 FAQ
1.How can I place an order for AP7370-28SA-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP7370-28SA-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 AP7370-28SA-7 reliable?
The price and inventory of AP7370-28SA-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP7370-28SA-7 is usually 5 days.
3.What payment methods are accepted for AP7370-28SA-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP7370-28SA-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP7370-28SA-7?
AP7370-28SA-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP7370-28SA-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 AP7370-28SA-7?
For technical support, including AP7370-28SA-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP7370-28SA-7 requirements.
6.How does Aetrix verify that AP7370-28SA-7 is sourced from the original manufacturer or authorized distributors?
All AP7370-28SA-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 AP7370-28SA-7 meets industry standards.
7.What is the process for return or replacement of AP7370-28SA-7?
All AP7370-28SA-7 units undergo pre-shipment inspection (PSI). If there is an issue with AP7370-28SA-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 AP7370-28SA-7 part is unused and in its original packaging.
Return procedure for AP7370-28SA-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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