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Diodes Incorporated AP7370-15SA-7
- Part No.:
- AP7370-15SA-7
- Manufacturer:
- Diodes Incorporated
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
AP7370-15SA-7.pdf
- Description:
- IC REG LINEAR 1.5V 300MA SOT23
- Quantity:
- Payment:
- Shipping:
Inventory:2,957
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Product details
Overview
AP7370-15SA-7 from Diodes Incorporated is a 1.5V fixed-output, 300mA ultra-low dropout (ULDO) linear regulator in SOT23 package, featuring 500mV dropout at 100mA, ±1% output voltage accuracy (1.5V × 98% to 102%), and 1.5–2.5µA quiescent current. It delivers stable power to low-power microcontrollers, sensor nodes, and portable instrumentation under wide 3.2–18V input conditions.
For engineers reviewing the AP7370-15SA-7 datasheet, AP7370-15SA-7 pinout, AP7370-15SA-7 application, or AP7370-15SA-7 equivalent, key selection criteria include dropout performance at light-to-moderate loads, reverse current protection, thermal shutdown behavior, and compatibility with 1µF ceramic output capacitors in space-constrained SOT23 layouts.
Technical Context
The AP7370-15SA-7 integrates an error amplifier, precision voltage reference, resistor network for fixed 1.5V output, current-limit circuit (200mA min for VOUT ≤ 2.5V), chip enable logic, and reverse-current blocking. Its architecture supports operation down to 3.2V input while maintaining regulation up to 18V, with thermal shutdown triggered at +160°C and 20°C hysteresis.
Line regulation is specified at ≤0.05%/V across 3.2–18V input range; load regulation is ≤0.5% over 1–150mA output current. Output voltage temperature coefficient is ±100ppm/°C, and ground current remains below 300µA at full rated load (150mA for 1.5V version).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 1.5V fixed, ±2% tolerance (98–102% of nominal), enabling direct supply to 1.5V logic or analog rails without external feedback. |
| Max Input Voltage | 18V absolute maximum, supporting wide-input industrial or battery-derived supplies (e.g., 12V rail with transient margin). |
| Dropout Voltage | 500mV @ 100mA (typ), allowing regulation from 2.0V input - critical for single-cell LiFePO₄ or dual-cell alkaline systems. |
| Quiescent Current | 1.5–2.5µA (typ/ max), minimizing standby power loss in always-on sensor or metering applications. |
| Current Limit | 200mA minimum (VOUT ≤ 2.5V), providing robust short-circuit protection without latch-off, suitable for intermittent fault conditions. |
| Thermal Shutdown | Activates at +160°C with +20°C hysteresis, preventing permanent damage during sustained overload or poor PCB thermal design. |
| Reverse Current Protection | Integrated blocking prevents backfeed from VOUT to VIN when input is absent - essential for multi-rail systems with shared outputs. |
Pinout & Package
SOT23-3 package: 2.9mm × 1.3mm footprint, 1.1mm height, thermally enhanced with exposed pad not present (standard SOT23). Compatible with standard reflow profiles and manual soldering.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VIN | Main input supply connection; accepts 3.2–18V DC; requires local 1µF ceramic decoupling per datasheet recommendation. |
| 2 | GND | Power ground reference for regulator core and error amplifier; must be low-impedance path to minimize noise coupling. |
| 3 | VOUT | Regulated 1.5V output; stable with ≥1µF ceramic capacitor; reverse-current protected to prevent backfeed into VIN. |
Key Features
| Feature | Design Value |
|---|---|
| Wide Input Range | Operates from 3.2V to 18V - eliminates need for pre-regulation in 9–12V industrial or automotive accessory circuits. |
| Ultra-Low IQ | 1.5µA typical ground current at zero load - extends battery life in portable weighing scales and handheld meters. |
| Ceramic Cap Compatible | Stable with 1.0µF X5R/X7R ceramic output capacitor - reduces BOM count and board area vs. tantalum or electrolytic alternatives. |
| Low Dropout | 500mV @ 100mA enables efficient 1.5V generation from 2.0V sources - critical for energy harvesting or low-voltage battery systems. |
| Reverse Current Blocking | Prevents VOUT from sourcing current into VIN when input is removed - avoids unintended powering of upstream circuitry in multi-supply systems. |
Applications
| Portable Weighing Scales | Metering Data Loggers |
|---|---|
|
Use Scenario: Battery-powered digital kitchen or industrial platform scales requiring stable 1.5V supply for ADC reference and microcontroller core. IC Role / Device Role / Timing Role: Primary 1.5V LDO delivering regulated rail to 24-bit sigma-delta ADC and low-power MCU, with reverse-current isolation during battery swap. Use Value: 1.5µA quiescent current extends AA/AAA battery life beyond 12 months in standby; ±2% output accuracy ensures consistent ADC full-scale calibration. |
Use Scenario: Compact utility meter data logger with isolated RS-485 interface and real-time clock, powered by primary lithium thionyl chloride cell. IC Role / Device Role / Timing Role: Fixed 1.5V regulator supplying RTC oscillator circuit and EEPROM I²C interface, operating from 3.6V battery through full discharge curve. Use Value: 500mV dropout allows regulation until battery reaches 2.0V; thermal shutdown prevents damage during extended high-temperature field deployment. |
| Handheld Test Instruments | Low-Power Sensor Nodes |
|
Use Scenario: Pocket-sized multimeter or continuity tester with LCD display and auto-ranging circuitry, using alkaline or rechargeable Li-ion battery. IC Role / Device Role / Timing Role: Main 1.5V supply for analog front-end op-amps and segment LCD bias generator, with line/load regulation <0.5% ensuring measurement stability. Use Value: 0.05%/V line regulation maintains accuracy across battery voltage sag; SOT23-3 footprint enables compact 2-layer PCB layout. |
Use Scenario: Wireless environmental sensor node (temperature/humidity) powered by coin cell or energy harvester, transmitting via BLE or LoRaWAN. IC Role / Device Role / Timing Role: Ultra-low-IQ 1.5V regulator powering MCU sleep mode and wake-up timer, activated only during periodic sensing bursts. Use Value: 1.5µA IQ minimizes self-discharge; reverse-current protection isolates sensor analog section when MCU enters deep-sleep state. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar fixed-output LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AP7361-15SA-7 | Lower 150mA output rating; 300mV dropout @ 100mA; same SOT23-3 package and 1.5V output. | Not suitable for 150mA continuous loads; optimized for sub-100mA sensor interfaces where lower IQ (1.2µA) is prioritized. | Select when load current stays ≤100mA and lowest possible standby power is required. |
| AP7375-15SA-7 | Successor device with improved 350mA rating, 400mV dropout @ 100mA, and tighter ±1% output tolerance (vs. ±2%). | Recommended for new designs; supports higher peak loads and offers better accuracy for precision analog rails. | Preferred for new designs requiring higher current headroom or tighter regulation; AP7370-15SA-7 is NOT RECOMMENDED FOR NEW DESIGN per datasheet. |
Compared with AP7370-15SA-7, AP7361-15SA-7 trades current capability for lower IQ in ultra-low-power niches, while AP7375-15SA-7 delivers higher output current, lower dropout, and tighter accuracy - making it the functional upgrade path for next-generation designs.
Availability
AP7370-15SA-7 is available at Aetrix Electronics and suitable for portable instrumentation, battery-powered test equipment, and industrial metering applications requiring stable component supply with known lifecycle status and RoHS-compliant packaging.
Supply support for AP7370-15SA-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 emphasis on power management, signal integrity, and connectivity solutions for industrial, computing, and consumer markets.
The AP7370 series belongs to Diodes' high-voltage ULDO regulator product line, designed specifically for USB-powered, portable, and battery-operated equipment needing wide-input, low-quiescent-current regulation with robust protection features.
FAQ
What is the maximum continuous output current for AP7370-15SA-7?
The AP7370-15SA-7 is rated for 300mA maximum output current, but its current limit is specified at ≥200mA for 1.5V versions (VOUT ≤ 2.5V). Continuous operation at 300mA requires adequate PCB copper area and ambient temperature ≤+85°C due to thermal resistance of 205°C/W in SOT23 package.
Does AP7370-15SA-7 require an external enable signal?
No - AP7370-15SA-7 has no enable pin and operates continuously when VIN is within 3.2–18V. The SOT23-3 variant lacks an EN terminal; enable functionality is only available in 5-pin packages (SOT25) via Pin 4 or 5 labeled NC in the fixed-output version.
Can AP7370-15SA-7 be used with a 10µF aluminum electrolytic output capacitor?
No - the AP7370 is optimized for low-ESR ceramic capacitors (≥1.0µF X5R/X7R). Aluminum electrolytics exhibit high ESR and capacitance drift, risking instability and poor transient response; ceramic is mandatory per datasheet AC stability requirements.
Is AP7370-15SA-7 pin-compatible with other AP7370 variants in SOT23?
Yes - all AP7370 SOT23 variants (SA suffix) share identical 3-pin SOT23-3 pinout (VIN-GND-VOUT), regardless of output voltage (1.2V to 5.0V). Only the internal resistor network differs; no layout change is needed when swapping between SA-coded parts.
AP7370-15SA-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):
- 1.5V
- 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
AP7370-15SA-7 FAQ
1.How can I place an order for AP7370-15SA-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP7370-15SA-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 AP7370-15SA-7 reliable?
The price and inventory of AP7370-15SA-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP7370-15SA-7 is usually 5 days.
3.What payment methods are accepted for AP7370-15SA-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP7370-15SA-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP7370-15SA-7?
AP7370-15SA-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP7370-15SA-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 AP7370-15SA-7?
For technical support, including AP7370-15SA-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP7370-15SA-7 requirements.
6.How does Aetrix verify that AP7370-15SA-7 is sourced from the original manufacturer or authorized distributors?
All AP7370-15SA-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 AP7370-15SA-7 meets industry standards.
7.What is the process for return or replacement of AP7370-15SA-7?
All AP7370-15SA-7 units undergo pre-shipment inspection (PSI). If there is an issue with AP7370-15SA-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 AP7370-15SA-7 part is unused and in its original packaging.
Return procedure for AP7370-15SA-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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