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Diodes Incorporated AP7370-15Y-13
- Part No.:
- AP7370-15Y-13
- Manufacturer:
- Diodes Incorporated
- Package:
- TO-243AA
- Datasheet:
-
AP7370-15Y-13.pdf
- Description:
- IC REG LINEAR 1.5V 300MA SOT89-3
- Quantity:
- Payment:
- Shipping:
Inventory:2,490
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Product details
Overview
AP7370-15Y-13 from Diodes Incorporated is a fixed-output 1.5V, 300mA ultra-low dropout (ULDO) linear regulator in SOT89 package, featuring 18V max input voltage, 500mV dropout at 100mA, ±1% output accuracy, and reverse current protection - designed for stable power delivery in portable instrumentation and battery-powered metering systems.
For engineers reviewing the AP7370-15Y-13 datasheet, AP7370-15Y-13 pinout, AP7370-15Y-13 application, or AP7370-15Y-13 equivalent, this page delivers verified technical context, package-specific pin mapping, real-world use cases, and validated alternative options for supply continuity and design migration.
Technical Context
The AP7370-15Y-13 integrates an error amplifier, precision voltage reference, and current-limit circuit to maintain regulation across 3.2–18V input while delivering 1.5V ±1% output up to 300mA. Its thermal shutdown triggers at +160°C with +20°C hysteresis, ensuring safe operation under overload or ambient stress.
It supports low-ESR ceramic capacitors (1.0µF minimum), achieves 0.05%/V line regulation and 0.5% load regulation, and draws only 1.5–2.5µA ground current at zero load - enabling long battery life in always-on portable devices.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.5V ±1% (ensures stable MCU core or sensor bias without external feedback) |
| Max Input Voltage | 18V (supports wide-range unregulated sources like automotive or multi-cell battery inputs) |
| Dropout Voltage | 500mV @ 100mA (enables regulation down to VIN = 2.0V, critical for single Li-ion or 2xAA operation) |
| Quiescent Current | 1.5–2.5µA (minimizes standby power loss in battery-backed metering and weighing scales) |
| Current Limit | 200mA (protects against short-circuit faults while maintaining compatibility with 150mA typical load) |
| Thermal Shutdown | +160°C with +20°C hysteresis (prevents latch-up and enables automatic recovery after cooling) |
| Reverse Current Protection | Integrated (blocks backfeed from VOUT to VIN during input removal or brownout) |
Pinout & Package
SOT89 package: 3-pin thermally enhanced plastic outline with exposed tab (EP) internally connected to GND - optimized for PCB heat dissipation in space-constrained portable designs.
| 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 and thermal path; must be soldered to large copper pour for θJA = 126°C/W |
| 3 | VOUT | Regulated 1.5V output; drives load directly; requires 1µF ceramic output capacitor for stability |
| EP | GND | Exposed pad tied to internal GND; mandatory for thermal performance and EMI reduction |
Key Features
| Feature | Design Value |
|---|---|
| Wide Input Range (3.2–18V) | Eliminates need for pre-regulation stages when interfacing with variable or unfiltered DC sources |
| Ultra-Low Quiescent Current (1.5µA) | Extends battery runtime beyond 1 year in low-duty-cycle weighing scale sleep modes |
| Reverse Current Protection | Prevents VOUT from back-driving VIN during hot-swap or partial power-down sequences |
| Low-ESR Ceramic Cap Compatibility | Enables compact, high-reliability filtering without tantalum or electrolytic capacitors |
| Thermal Shutdown with Hysteresis | Provides self-protecting behavior under sustained overload without external monitoring circuitry |
Applications
| Portable Weighing Scales | Metering Data Loggers |
|---|---|
Use Scenario: Battery-powered digital kitchen or industrial platform scales operating in intermittent active/sleep cycles. IC Role / Device Role / Timing Role: Primary 1.5V supply for load-cell ADC and microcontroller core logic. Use Value: Ultra-low quiescent current preserves battery life over 2+ years; reverse current protection prevents measurement drift during battery replacement. |
Use Scenario: Compact energy or water meter with isolated RS-485 interface and EEPROM storage. IC Role / Device Role / Timing Role: Clean 1.5V rail for precision analog front-end and real-time clock backup domain. Use Value: Tight ±1% output accuracy ensures consistent ADC reference scaling; 18V input tolerance accommodates transient surges on utility-side power rails. |
| Handheld Test Instruments | USB-Powered Sensor Nodes |
Use Scenario: Pocket-sized multimeter or thermal imager powered by internal Li-ion with USB charging. IC Role / Device Role / Timing Role: Post-regulator for 1.5V logic and display driver ICs downstream of main buck converter. Use Value: 500mV dropout allows full regulation until battery discharges to 2.0V; thermal shutdown protects during probe short-circuit events. |
Use Scenario: Low-cost environmental sensor node drawing power from USB 5V bus with optional coin-cell backup. IC Role / Device Role / Timing Role: Standby LDO supplying 1.5V to ultra-low-power MCU and I²C sensors. Use Value: 1.5µA ground current enables >10-year shelf life on coin cell; SOT89 EP improves thermal margin during USB hot-plug transients. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar fixed-output ULDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AP7375-15Y-13 | Successor device with same 1.5V output but improved 350mA current limit and lower 300mV dropout at 100mA | Direct drop-in replacement with higher load capability and better efficiency at light loads | Preferred for new designs requiring extended current headroom or lower dropout |
| MCP1703T-1502E/MB | Microchip 1.5V LDO with 250mA limit, 600mV dropout, and 2.5µA IQ - no reverse current protection | Lacks reverse current blocking; requires external diode if backfeed risk exists | Acceptable where cost sensitivity outweighs protection requirements and thermal margin permits |
Compared with AP7370-15Y-13, AP7375-15Y-13 offers higher current capacity and lower dropout for future-proofing, while MCP1703T-1502E/MB trades reverse current protection for broader distributor availability - making AP7370-15Y-13 optimal for legacy metering designs needing guaranteed backfeed isolation.
Availability
AP7370-15Y-13 is available at Aetrix Electronics and suitable for portable weighing scales, battery-powered metering loggers, and handheld test instruments requiring stable component supply with long-term lifecycle support.
Supply support for AP7370-15Y-13 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 for power management, signal integrity, and connectivity applications.
The AP7370 series belongs to Diodes' high-voltage ULDO regulator product line, engineered specifically for battery-powered and instrument-grade applications demanding wide input range, precision output, and robust fault protection.
FAQ
What is the maximum continuous output current for AP7370-15Y-13?
The AP7370-15Y-13 delivers up to 300mA continuously under recommended operating conditions (TJ ≤ +125°C, VIN ≤ 18V). Its current limit is specified at 200mA for 1.5V output versions per datasheet Note 4, with thermal shutdown engaging above safe junction temperature to prevent damage.
Does AP7370-15Y-13 require an external capacitor on the VOUT pin?
Yes - a minimum 1.0µF ceramic capacitor with low ESR is required on VOUT for stability and transient response, as confirmed in the Electrical Characteristics table and Typical Applications Circuit. No additional compensation components are needed due to internal compensation.
Is AP7370-15Y-13 RoHS and halogen-free compliant?
Yes - AP7370-15Y-13 meets EU Directive 2002/95/EC (RoHS), 2011/65/EU (RoHS 2), and 2015/863/EU (RoHS 3), and is certified halogen- and antimony-free ("Green") with <900ppm bromine, <900ppm chlorine, and <1000ppm antimony compounds.
Why is AP7370 marked "Not Recommended for New Design"?
Diodes has designated AP7370 as "Not Recommended for New Design" because the pin-compatible AP7375 offers improved specifications - including higher current limit (350mA vs. 200mA), lower dropout (300mV vs. 500mV), and enhanced thermal performance - while maintaining identical footprint and electrical interface.
AP7370-15Y-13 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- TO-243AA
- 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-89-3
AP7370-15Y-13 FAQ
1.How can I place an order for AP7370-15Y-13 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP7370-15Y-13 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 AP7370-15Y-13 reliable?
The price and inventory of AP7370-15Y-13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP7370-15Y-13 is usually 5 days.
3.What payment methods are accepted for AP7370-15Y-13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP7370-15Y-13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP7370-15Y-13?
AP7370-15Y-13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP7370-15Y-13 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 AP7370-15Y-13?
For technical support, including AP7370-15Y-13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP7370-15Y-13 requirements.
6.How does Aetrix verify that AP7370-15Y-13 is sourced from the original manufacturer or authorized distributors?
All AP7370-15Y-13 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 AP7370-15Y-13 meets industry standards.
7.What is the process for return or replacement of AP7370-15Y-13?
All AP7370-15Y-13 units undergo pre-shipment inspection (PSI). If there is an issue with AP7370-15Y-13, 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 AP7370-15Y-13 part is unused and in its original packaging.
Return procedure for AP7370-15Y-13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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