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Diodes Incorporated AP7381-70V-A
- Part No.:
- AP7381-70V-A
- Manufacturer:
- Diodes Incorporated
- Package:
- TO-226-3, TO-92-3 (TO-226AA) Formed Leads
- Datasheet:
-
AP7381-70V-A.pdf
- Description:
- IC REG LIN 7V 150MA TO92 AMMO 2K
- Quantity:
- Payment:
- Shipping:
Inventory:4,032
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Product details
Overview
AP7381-70V-A 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 ultra-low 2.5µA ground current at zero load - enabling long battery life in USB-powered and metering applications.
For engineers reviewing the AP7381-70V-A datasheet, AP7381-70V-A pinout, AP7381-70V-A application, or AP7381-70V-A equivalent, key selection criteria include wide 3.3–40V input range, TO92-compatible leaded package with GND/VIN/VOUT pinout, thermal shutdown at +160°C, and compatibility with low-ESR ceramic capacitors without external compensation.
Technical Context
The AP7381-70V-A integrates a precision voltage reference, error amplifier, resistor network for fixed 7.0V output, current-limit protection (150mA), chip enable logic, and thermal shutdown circuitry. Its architecture supports stable regulation across -40°C to +125°C junction temperature with ±100ppm/°C output voltage drift.
It operates as a single-stage series pass regulator with no external feedback required. Line regulation is 0.05%/V and load regulation is 0.5% over 1–150mA, while PSRR reaches 60dB at 1kHz - suitable for noise-sensitive analog rails powered from unregulated DC sources like automotive batteries or industrial power supplies.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 7.0V ±2% - eliminates need for external resistive divider and ensures consistent biasing of downstream 7V-tolerant circuits. |
| Input Voltage Range | 3.3V to 40V - supports direct connection to 24V industrial buses or 36V solar inputs without pre-regulation. |
| Dropout Voltage | 1000mV @ 100mA - enables regulation down to VIN = 8.0V, critical for maintaining 7V rail during brownout conditions. |
| Ground Current | 2.5µA @ IOUT = 0mA - minimizes standby power loss in always-on metering and IoT edge nodes. |
| Thermal Shutdown | Activates at +160°C with +20°C hysteresis - provides robust self-protection during sustained overload or poor PCB heatsinking. |
| PSRR | 60dB @ 1kHz - suppresses ripple from noisy switch-mode upstream supplies feeding sensitive analog sensors or ADC references. |
| Output Accuracy | ±2% over -40°C to +125°C - meets tight tolerance requirements for precision voltage references in e-meters and industrial controllers. |
Pinout & Package
AP7381-70V-A is supplied in TO92 (Ammo Packing) package - a through-hole, three-terminal plastic case with 0.1" lead pitch, rated for 165°C/W thermal resistance and not recommended for new designs per Diodes' documentation. Pin assignments are standardized across TO92 variants.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VIN | Unregulated input supply connection; must be decoupled with ≥1µF ceramic capacitor close to pin. |
| 2 | GND | Power ground reference for internal error amplifier and current limit circuit; requires low-impedance PCB trace to bulk capacitance. |
| 3 | VOUT | Stable 7.0V regulated output; requires ≥2.2µF low-ESR ceramic capacitor for stability and transient response. |
Key Features
| Feature | Design Value |
|---|---|
| Wide Input Range Support | Operates from 3.3V to 40V - eliminates need for intermediate buck stage in multi-rail industrial systems. |
| Ultra-Low Quiescent Current | 2.5µA ground current at zero load - extends battery runtime in portable e-meters and remote sensors. |
| Ceramic Capacitor Compatibility | Stable with ≥2.2µF X5R/X7R ceramics - reduces BOM count and board space vs. tantalum or electrolytic alternatives. |
| Integrated Protection | Current limit (150mA), thermal shutdown (+160°C), and short-circuit protection - removes need for external fault management circuitry. |
| High Accuracy Over Temperature | ±2% output tolerance maintained from -40°C to +125°C - ensures reliable operation in outdoor metering enclosures. |
Applications
| Smart Electricity Meters | Industrial Portable Testers |
|---|---|
Use Scenario: Powering metrology ASICs and real-time clocks in Class 0.5S revenue-grade e-meters operating from 24V DC auxiliary supply. IC Role / Device Role / Timing Role: Primary 7V bias rail generator for analog front-end and isolation interface ICs. Use Value: Maintains ±2% output under 40V line transients and -40°C cold-start conditions, ensuring measurement integrity per IEC 62053. |
Use Scenario: Supplying 7V to handheld multimeter microcontrollers and precision ADC reference buffers during field calibration. IC Role / Device Role / Timing Role: Low-noise, low-quiescent LDO for analog signal chain biasing. Use Value: 60dB PSRR rejects switching noise from on-board DC-DC converters, preserving 5½-digit measurement accuracy. |
| USB-Powered Diagnostic Tools | Legacy Industrial Controllers |
Use Scenario: Regulating 7V rail from USB-C PD negotiable 9–20V inputs in portable oscilloscope probes and bus analyzers. IC Role / Device Role / Timing Role: Wide-input ULDO enabling single-supply flexibility across USB PD profiles. Use Value: 1000mV dropout allows full 7V output even when USB PD drops to 9V under cable loss, avoiding brownout resets. |
Use Scenario: Replacing obsolete 7V regulators in legacy PLC I/O modules powered from 24V backplanes with aging filtering. IC Role / Device Role / Timing Role: Drop-in replacement for TO92-packaged 7V LDOs requiring minimal PCB rework. Use Value: Identical pinout and footprint to legacy parts, with improved thermal shutdown margin (+160°C vs. typical +150°C). |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 7V ULDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MCP1703T-7002E/MB | 7.0V fixed output, 250mA rating, SOT89-3 package, 1.4V dropout @ 250mA, 3.5µA quiescent current. | Higher current capability but larger dropout and higher IQ - less suitable for battery-constrained meters. | Select when >150mA load or better thermal performance (SOT89 θJA = 125°C/W) is required. |
| TPS7A16A-Q1 | 7.0V fixed output, AEC-Q100 qualified, 150mA, 1.3V dropout @ 100mA, 17µA IQ, SOIC-8 package. | Automotive-qualified with enhanced ESD (HBM 4kV) and PPAP support - over-specified for industrial metering. | Select only for automotive-grade designs requiring IATF 16949 traceability and extended temperature validation. |
Compared with MCP1703T-7002E/MB and TPS7A16A-Q1, AP7381-70V-A offers the lowest ground current (2.5µA) and smallest TO92 footprint - making it optimal for cost-sensitive, space-constrained, and ultra-low-power e-meter designs where 150mA suffices.
Availability
AP7381-70V-A is available at Aetrix Electronics and suitable for smart electricity meters, industrial portable testers, and USB-powered diagnostic tools requiring stable component supply with long lifecycle visibility and RoHS-compliant through-hole packaging.
Supply support for AP7381-70V-A 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 manufacturer specializing in discrete, analog, and mixed-signal devices, with design centers across Asia, Europe, and the US and ISO 9001/IATF 16949 certified manufacturing.
The AP7381 series belongs to Diodes' high-voltage linear regulator product line, engineered specifically for battery-powered and industrial instrumentation applications demanding wide input range, low IQ, and robust thermal protection in compact packages.
FAQ
What is the maximum input voltage the AP7381-70V-A can withstand?
The AP7381-70V-A has an absolute maximum input voltage rating of 45V, with recommended continuous operation up to 40V. Exceeding 40V may reduce reliability or trigger thermal shutdown depending on ambient conditions and PCB thermal design. The device is not intended for 48V telecom applications without derating.
Can AP7381-70V-A operate with a 10µF output capacitor?
Yes - the AP7381-70V-A is stable with ceramic capacitors ranging from 2.2µF to 100µF. A 10µF X5R capacitor improves load transient response and reduces output ripple by ~15% compared to the minimum 2.2µF, with no risk of oscillation or phase margin degradation.
Is AP7381-70V-A pin-compatible with AP7381-33V-A?
Yes - all AP7381 variants share identical TO92 (Ammo Packing) pinout: Pin 1 = VIN, Pin 2 = GND, Pin 3 = VOUT. Output voltage is set internally; no external components differ. Swapping 3.3V and 7.0V versions requires only firmware or system-level verification of downstream voltage tolerance.
Does AP7381-70V-A require an input capacitor?
Yes - a minimum 1.0µF ceramic capacitor is required between VIN and GND, placed within 5mm of the package. This prevents instability caused by source inductance and suppresses high-frequency noise from upstream supplies, especially in battery-fed or long-trace industrial wiring scenarios.
AP7381-70V-A Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- TO-226-3, TO-92-3 (TO-226AA) Formed Leads
- Packaging:
- Tape & Box (TB)
- 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):
- -
- Current - Output:
- 150mA
- Current - Quiescent (Iq):
- -
- Current - Supply (Max):
- 25 µA
- PSRR:
- -
- Control Features:
- -
- Protection Features:
- Current Limit, Short Circuit, Thermal Shutdown
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- TO-92
AP7381-70V-A FAQ
1.How can I place an order for AP7381-70V-A through Aetrix?
Please submit a Request for Quotation (RFQ) for AP7381-70V-A 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 AP7381-70V-A reliable?
The price and inventory of AP7381-70V-A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP7381-70V-A is usually 5 days.
3.What payment methods are accepted for AP7381-70V-A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP7381-70V-A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP7381-70V-A?
AP7381-70V-A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP7381-70V-A 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 AP7381-70V-A?
For technical support, including AP7381-70V-A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP7381-70V-A requirements.
6.How does Aetrix verify that AP7381-70V-A is sourced from the original manufacturer or authorized distributors?
All AP7381-70V-A 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 AP7381-70V-A meets industry standards.
7.What is the process for return or replacement of AP7381-70V-A?
All AP7381-70V-A units undergo pre-shipment inspection (PSI). If there is an issue with AP7381-70V-A, 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 AP7381-70V-A part is unused and in its original packaging.
Return procedure for AP7381-70V-A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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