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Diodes Incorporated AP7381-70Y-13
- Part No.:
- AP7381-70Y-13
- Manufacturer:
- Diodes Incorporated
- Package:
- TO-243AA
- Datasheet:
-
AP7381-70Y-13.pdf
- Description:
- IC REG LINEAR 7V 150MA SOT89-3
- Quantity:
- Payment:
- Shipping:
Inventory:2,324
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Product details
Overview
AP7381-70Y-13 from Diodes Incorporated is a fixed-output 7.0V ultra-low dropout (ULDO) linear regulator IC designed for high-input-voltage, low-power portable systems. It delivers up to 150mA output current with 1000mV dropout at 100mA, ±2% output voltage accuracy, and 2.5µA quiescent current - enabling long battery life in USB-powered meters and handheld instrumentation.
For engineers reviewing the AP7381-70Y-13 datasheet, AP7381-70Y-13 pinout, AP7381-70Y-13 application, or AP7381-70Y-13 equivalent, key selection considerations include its 40V max input rating, thermal shutdown at +160°C, compatibility with low-ESR ceramic capacitors, and SOT89-3 package suitability for space-constrained industrial sensor nodes.
Technical Context
The AP7381-70Y-13 integrates a precision voltage reference, error amplifier, resistor network for fixed 7.0V output, current-limit protection (150mA), and chip-enable logic. Its architecture supports stable regulation across -40°C to +125°C junction temperature with ±100ppm/°C output voltage drift.
It operates with input voltages from 3.3V to 40V and maintains load regulation within ±0.5% over 1–150mA output range. Line regulation is specified at ±0.05%/V across VIN = VOUT+2V to 40V, and PSRR reaches 60dB at 1kHz - critical for noise-sensitive analog front-ends in smart metering.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 7.0V ±2% - ensures stable bias for 5V/3.3V LDO cascades or microcontroller I/O rails requiring precise headroom. |
| Max Input Voltage | 40V - supports direct connection to unregulated 24V industrial buses or automotive battery inputs with transient margin. |
| Dropout Voltage | 1000mV @ 100mA - enables operation down to VIN = 8.0V while maintaining regulation, reducing heat dissipation vs. standard LDOs. |
| Quiescent Current | 2.5µA @ zero load - extends battery runtime in always-on e-meter standby modes without compromising wake-up response. |
| Thermal Shutdown | +160°C with +20°C hysteresis - provides robust self-protection during sustained overload or poor PCB thermal design. |
| PSRR | 60dB @ 1kHz - suppresses ripple from upstream switching converters, preserving signal integrity in ADC reference paths. |
| Output Accuracy | ±2% over -40°C to +125°C - eliminates need for external trimming in wide-temperature industrial deployments. |
Pinout & Package
SOT89-3 package: compact 4.6mm × 2.6mm surface-mount outline with exposed thermal pad (θJA = 125°C/W), optimized for moderate-power dissipation in dense PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (VIN) | Input Supply Terminal | Accepts 3.3V–40V DC input; requires 1µF ceramic decoupling close to pin to ensure stability and transient response. |
| 2 (GND) | Ground Reference | Common return path for internal circuitry and output capacitor; must connect to low-impedance ground plane for thermal and noise performance. |
| 3 (VOUT) | Regulated Output | Delivers fixed 7.0V ±2%; requires 2.2µF low-ESR ceramic capacitor for loop stability and load transient suppression. |
Key Features
| Feature | Design Value |
|---|---|
| Wide Input Range (up to 40V) | Enables single-regulator solutions across 12V/24V/36V industrial power rails without external pre-regulation. |
| Ultra-Low Quiescent Current (2.5µA) | Reduces no-load power loss to <18µW at 7V, critical for battery-backed real-time clock or sensor sleep modes. |
| Low-ESR Ceramic Cap Compatibility | Eliminates need for costly tantalum or aluminum electrolytic capacitors, lowering BOM cost and improving reliability. |
| Integrated Short-Circuit Protection | Limits output current to ~150mA during fault, preventing damage to PCB traces and upstream power sources. |
| Thermal Shutdown with Hysteresis | Prevents thermal runaway by disabling output above +160°C and re-enabling only after cooling to +140°C. |
Applications
| Smart Electricity Meters | Portable Data Loggers |
|---|---|
Use Scenario: Powering metrology ASICs and isolated RS-485 transceivers from 24V DC bus under varying load and temperature. IC Role / Device Role / Timing Role: Primary 7V bias rail generator with high line/load regulation to maintain ADC reference stability. Use Value: ±0.05%/V line regulation and ±0.5% load regulation prevent measurement drift during voltage sags or surge events. |
Use Scenario: Supplying 7V to low-power microcontrollers and SD card interfaces in field-deployed environmental sensors. IC Role / Device Role / Timing Role: Standby-mode LDO delivering regulated voltage during deep-sleep intervals between sampling cycles. Use Value: 2.5µA quiescent current extends 2xAA alkaline battery life beyond 5 years in 1-minute wake-up intervals. |
| Industrial Handheld Scanners | USB-Powered Test Adapters |
Use Scenario: Regulating 7V for CMOS image sensors and laser diode drivers in ruggedized barcode scanners. IC Role / Device Role / Timing Role: High-accuracy voltage source ensuring consistent sensor gain and laser pulse amplitude. Use Value: ±2% output accuracy over -40°C to +85°C eliminates calibration drift across operating environments. |
Use Scenario: Deriving 7V rail from USB 5V via boost converter for legacy test equipment requiring non-standard supply voltages. IC Role / Device Role / Timing Role: Post-regulator stabilizing boosted output against USB port voltage variation and cable drop. Use Value: 60dB PSRR at 1kHz attenuates switching noise from boost IC, preventing false triggers in digital I/O circuits. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ULDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MCP1703T-7002E/MB | 7.0V fixed output, 250mA rating, 600mV dropout @ 250mA, 3µA IQ, SOT23-5 package | Higher current capability but larger dropout at full load; lacks thermal hysteresis | Preferred when >150mA peak load required and board space allows SOT23-5 footprint |
| TPS7A16A-Q1 | 7.0V fixed output, 150mA rating, 500mV dropout @ 100mA, 17µA IQ, thermal foldback instead of hard shutdown | Automotive-qualified (AEC-Q100), lower dropout, but higher quiescent current reduces battery life | Selected for automotive-grade designs where qualification and lower dropout outweigh IQ penalty |
Compared with MCP1703T-7002E/MB and TPS7A16A-Q1, the AP7381-70Y-13 offers superior quiescent current (2.5µA vs. ≥3µA) and tighter thermal hysteresis control (+20°C vs. unspecified), making it optimal for ultra-low-power industrial metering where thermal cycling and battery longevity are primary constraints.
Availability
AP7381-70Y-13 is available at Aetrix Electronics and suitable for smart electricity meters, portable data loggers, industrial handheld scanners, and USB-powered test adapters requiring stable component supply with guaranteed long-term manufacturability.
Supply support for AP7381-70Y-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 manufacturer of discrete semiconductors and analog ICs, specializing in high-reliability power management, signal integrity, and protection solutions for industrial and consumer markets.
The AP7381 series belongs to Diodes' high-voltage ULDO regulator product line, engineered specifically for battery-powered and wide-input industrial applications demanding low IQ, high accuracy, and robust fault protection.
FAQ
What is the minimum input voltage required for the AP7381-70Y-13 to regulate at 7.0V?
The AP7381-70Y-13 requires a minimum input voltage of 3.3V per datasheet Recommended Operating Conditions, but to maintain regulation at full 150mA load, VIN must exceed VOUT + VDROP. With typical dropout of 1000mV at 100mA and worst-case increase at higher currents, VIN ≥ 8.2V is recommended for reliable 7.0V output under full load.
Can the AP7381-70Y-13 be used with ceramic output capacitors smaller than 2.2µF?
No - the datasheet specifies 2.2µF minimum for COUT using low-ESR ceramic capacitors to ensure loop stability and meet transient response requirements. Using smaller values risks oscillation or excessive output voltage deviation during load steps, as confirmed by stability testing in DS39917 Rev. 5-2.
Does the AP7381-70Y-13 have an enable pin?
No - the AP7381-70Y-13 does not include an enable (EN) pin. It is a permanently enabled device; on/off control must be implemented externally via the input supply rail or a series MOSFET switch, as no chip-enable circuitry is present in this fixed-output variant.
Is the SOT89-3 package of AP7381-70Y-13 RoHS-compliant and lead-free?
Yes - the AP7381-70Y-13 is fully RoHS 3 compliant (2015/863/EU), totally lead-free, halogen-free, and antimony-free per Diodes' "Green" definition (<900ppm Br, <900ppm Cl, <1000ppm Sb), with matte tin-plated leads meeting MIL-STD-202 solderability standards.
AP7381-70Y-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):
- 40V
- Voltage - Output (Min/Fixed):
- 7V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 1V @ 100mA (Typ)
- Current - Output:
- 150mA
- Current - Quiescent (Iq):
- 2.5 µA
- Current - Supply (Max):
- 25 µA
- PSRR:
- -
- Control Features:
- -
- Protection Features:
- Current Limit, Thermal Shutdown
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-89-3
AP7381-70Y-13 FAQ
1.How can I place an order for AP7381-70Y-13 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP7381-70Y-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 AP7381-70Y-13 reliable?
The price and inventory of AP7381-70Y-13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP7381-70Y-13 is usually 5 days.
3.What payment methods are accepted for AP7381-70Y-13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP7381-70Y-13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP7381-70Y-13?
AP7381-70Y-13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP7381-70Y-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 AP7381-70Y-13?
For technical support, including AP7381-70Y-13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP7381-70Y-13 requirements.
6.How does Aetrix verify that AP7381-70Y-13 is sourced from the original manufacturer or authorized distributors?
All AP7381-70Y-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 AP7381-70Y-13 meets industry standards.
7.What is the process for return or replacement of AP7381-70Y-13?
All AP7381-70Y-13 units undergo pre-shipment inspection (PSI). If there is an issue with AP7381-70Y-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 AP7381-70Y-13 part is unused and in its original packaging.
Return procedure for AP7381-70Y-13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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