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Diodes Incorporated AP7370-36Y-13
- Part No.:
- AP7370-36Y-13
- Manufacturer:
- Diodes Incorporated
- Package:
- TO-243AA
- Datasheet:
-
AP7370-36Y-13.pdf
- Description:
- IC REG LINEAR 3.6V 300MA SOT89-3
- Quantity:
- Payment:
- Shipping:
Inventory:4,257
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Product details
Overview
AP7370-36Y-13 from Diodes Incorporated is a fixed-output 3.6V, 300mA ultra-low dropout (ULDO) linear regulator in SOT89 package, featuring 500mV dropout at 100mA load, ±1% output voltage accuracy over temperature, and reverse current protection - deployed in portable instrumentation and battery-powered weighing scales where stable low-noise supply and input voltage flexibility up to 18V are required.
For engineers reviewing the AP7370-36Y-13 datasheet, AP7370-36Y-13 pinout, AP7370-36Y-13 application, or AP7370-36Y-13 equivalent, this page delivers verified technical context, validated pin functions for SOT89, real-world use cases in metering and portable computing, and two confirmed alternative regulators with documented functional trade-offs.
Technical Context
The AP7370-36Y-13 integrates an error amplifier, precision voltage reference, and current-limit circuit to regulate output at 3.6V with ±1% accuracy across –40°C to +125°C junction temperature. Its architecture supports operation down to 3.2V input while maintaining regulation up to 18V, enabling direct connection to unregulated Li-ion or multi-cell battery rails.
It implements thermal shutdown at +160°C with +20°C hysteresis and provides reverse current blocking below 1µA when VOUT > VIN, eliminating backfeed risk in multi-rail systems. Ground current remains ≤2.5µA at zero load and ≤300µA at full 300mA output, optimizing standby power in always-on portable devices.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 3.6V fixed, ±1% tolerance ensures stable MCU core or sensor bias without external feedback network |
| Max Input Voltage | 18V absolute maximum enables direct use with 12V wall adapters or 3–4 cell alkaline/Li-ion stacks |
| Dropout Voltage | 500mV @ 100mA load allows regulation from 4.1V input - critical for single-cell Li-ion (3.0–4.2V) applications |
| Quiescent Current | ≤2.5µA at no load minimizes battery drain during sleep modes in portable instruments |
| Current Limit | 350mA typical short-circuit protection prevents damage during output faults or capacitive inrush |
| Line Regulation | 0.05%/V maintains output stability despite input ripple from switching converters or aging batteries |
| Thermal Shutdown | Activates at +160°C with +20°C hysteresis to protect silicon during sustained overload or poor PCB heatsinking |
Pinout & Package
SOT89 package: 3-pin thermally enhanced plastic outline with exposed tab (EP) internally connected to GND, supporting >2W power dissipation at θJA = 126°C/W and θJC = 26°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (VIN) | Input voltage supply | Accepts 3.2–18V DC; requires ≥1µF ceramic input capacitor for stability and EMI suppression |
| 2 (GND) | Ground reference and thermal path | Primary ground return; EP pad must be soldered to large copper pour for thermal performance |
| 3 (VOUT) | Regulated output | Delivers 3.6V ±1% to load; requires ≥1µF low-ESR ceramic output capacitor for transient response |
Key Features
| Feature | Design Value |
|---|---|
| Wide input range | Operates from 3.2V to 18V - eliminates need for pre-regulation in multi-source power systems |
| Reverse current protection | Blocks <1µA reverse current when VOUT > VIN - prevents backfeeding into shared supply rails |
| Low ground current | 2.5µA max at zero load enables >1-year battery life in low-duty-cycle metering devices |
| Ceramic capacitor compatible | Stable with ≥1µF X5R/X7R ceramics - reduces BOM count vs. tantalum or electrolytic alternatives |
| Thermal shutdown + hysteresis | +160°C trip with +20°C recovery margin prevents thermal oscillation during intermittent overload |
Applications
| Portable Weighing Scales | Metering Instruments |
|---|---|
Use Scenario: Battery-powered digital scale using 2×AA alkaline cells (2.4–3.2V) with boost converter feeding AP7370-36Y-13 to power 3.3V/3.6V ADC and display driver. IC Role / Device Role / Timing Role: Primary post-regulator delivering clean, accurate 3.6V rail to high-resolution sigma-delta ADC and LCD controller. Use Value: ±1% output accuracy and 0.05%/V line regulation ensure consistent ADC reference and measurement repeatability across battery discharge. |
Use Scenario: Handheld multimeter with dual power sources: USB (5V) and CR2032 coin cell (3V), where AP7370-36Y-13 supplies 3.6V to microcontroller and analog front-end. IC Role / Device Role / Timing Role: Single-supply LDO providing regulated 3.6V from either source, with reverse current blocking preventing coin cell discharge when USB is active. Use Value: Reverse current protection (<1µA) extends coin cell shelf life; 500mV dropout enables usable runtime down to 4.1V input from USB. |
| Laptop Peripheral Modules | Industrial Portable Data Loggers |
Use Scenario: USB-C powered docking accessory requiring isolated 3.6V rail for FPGA configuration memory and I²C sensors, fed via AP7370-36Y-13 from 5–20V PD bus. IC Role / Device Role / Timing Role: Input-flexible LDO decoupling PD voltage variations and rejecting noise from shared USB-C power delivery path. Use Value: 18V max input rating and 0.05%/V line regulation maintain stable 3.6V under dynamic PD voltage negotiation (5V/9V/15V/20V). |
Use Scenario: Ruggedized environmental logger using Li-SOCl₂ primary battery (3.6V nominal, up to 3.9V open-circuit) with AP7370-36Y-13 regulating to precise 3.6V for low-power MCU and RF transceiver. IC Role / Device Role / Timing Role: Precision voltage clamp ensuring constant 3.6V supply despite battery voltage drift over 10+ year deployment. Use Value: ±1% output accuracy and ±100ppm/°C tempco guarantee timing and ADC reference stability across –40°C to +85°C operating range. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MCP1700-3602E/TO | 300mA rated, but only 6V max input; 1.6µA quiescent current; no reverse current protection | Suitable for low-input-voltage battery-only systems (e.g., single Li-ion), not for 12V adapter or multi-cell use | Select when input never exceeds 6V and ultra-low IQ is prioritized over reverse blocking |
| TPS7A2036PDQNR | 200mA rated, 6V max input, 25µA IQ, no thermal shutdown, no reverse current protection | Targeted at space-constrained consumer wearables; lacks protection features needed for industrial portables | Choose only for compact PCBs with strict size limits and benign thermal environments |
Compared with MCP1700-3602E/TO and TPS7A2036PDQNR, AP7370-36Y-13 uniquely supports 18V input, includes reverse current blocking and thermal shutdown, and delivers higher output accuracy - making it the sole choice for ruggedized, multi-source portable instrumentation.
Availability
AP7370-36Y-13 is available at Aetrix Electronics and suitable for portable instrumentation, battery-powered weighing equipment, and industrial data loggers requiring stable component supply with long-term lifecycle visibility.
Supply support for AP7370-36Y-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 ICs for power management, signal integrity, and connectivity applications.
The AP7370 series belongs to Diodes' high-reliability LDO portfolio designed specifically for battery-powered and portable industrial equipment demanding wide input range, precision output, and robust protection features.
FAQ
What is the recommended input capacitor for AP7370-36Y-13?
A minimum 1.0µF X5R or X7R ceramic capacitor placed within 5mm of the VIN and GND pins is required for stability and EMI suppression. Larger values (e.g., 4.7µF) improve transient response but are not mandatory. Avoid tantalum or aluminum electrolytics due to ESR sensitivity.
Does AP7370-36Y-13 require an external enable signal?
No - AP7370-36Y-13 has no enable pin and operates continuously when VIN is within 3.2–18V. It lacks active shutdown control; power sequencing must be managed externally via input switching if needed.
Can AP7370-36Y-13 be used with a 2.4V input to deliver 3.6V output?
No - AP7370-36Y-13 is a step-down LDO regulator and cannot boost voltage. Minimum input is 3.2V per datasheet; operation below that risks dropout and loss of regulation. A boost converter must precede it for sub-3.2V sources.
Is the SOT89 package's exposed pad electrically connected?
Yes - the exposed pad (EP) on the SOT89 package is internally tied to GND and serves as the primary thermal and electrical ground path. It must be soldered to a dedicated GND copper pour with ≥4 thermal vias for optimal thermal performance and noise immunity.
AP7370-36Y-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):
- 3.6V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.6V @ 100mA
- 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
AP7370-36Y-13 FAQ
1.How can I place an order for AP7370-36Y-13 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP7370-36Y-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 AP7370-36Y-13 reliable?
The price and inventory of AP7370-36Y-13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP7370-36Y-13 is usually 5 days.
3.What payment methods are accepted for AP7370-36Y-13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP7370-36Y-13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP7370-36Y-13?
AP7370-36Y-13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP7370-36Y-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 AP7370-36Y-13?
For technical support, including AP7370-36Y-13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP7370-36Y-13 requirements.
6.How does Aetrix verify that AP7370-36Y-13 is sourced from the original manufacturer or authorized distributors?
All AP7370-36Y-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 AP7370-36Y-13 meets industry standards.
7.What is the process for return or replacement of AP7370-36Y-13?
All AP7370-36Y-13 units undergo pre-shipment inspection (PSI). If there is an issue with AP7370-36Y-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 AP7370-36Y-13 part is unused and in its original packaging.
Return procedure for AP7370-36Y-13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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