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Diodes Incorporated AP7370-12Y-13
- Part No.:
- AP7370-12Y-13
- Manufacturer:
- Diodes Incorporated
- Package:
- TO-243AA
- Datasheet:
-
AP7370-12Y-13.pdf
- Description:
- IC REG LINEAR 1.2V 300MA SOT89-3
- Quantity:
- Payment:
- Shipping:
Inventory:4,323
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Product details
Overview
AP7370-12Y-13 from Diodes Incorporated is a fixed-output 1.2V, 300mA ultra-low dropout (ULDO) linear regulator in SOT89 package, featuring 18V max input voltage, 500mV dropout at 100mA, ±1% output accuracy, reverse current protection, and thermal shutdown-designed for precision power regulation in battery-powered instrumentation and portable computing.
For engineers reviewing the AP7370-12Y-13 datasheet, AP7370-12Y-13 pinout, AP7370-12Y-13 application, or AP7370-12Y-13 equivalent, this device supports low-noise, high-PSRR analog subsystems where input-to-output differential is constrained, ESR-insensitive ceramic output capacitors are required, and quiescent current below 2.5µA at no load is critical.
Technical Context
The AP7370-12Y-13 integrates a precision voltage reference, error amplifier, and current-limit circuit to maintain stable 1.2V output across -40°C to +125°C junction temperature with ≤0.5% load regulation and 0.05%/V line regulation. Its internal architecture enables operation down to 3.2V input while sustaining full 300mA output capability only when VOUT ≥ 2.8V-thus the 1.2V version relies on its wide VIN range and low dropout for low-VIN biasing scenarios.
Reverse current protection blocks backflow from VOUT to VIN during shutdown or input collapse, and thermal shutdown activates at +160°C with +20°C hysteresis. The IC is optimized for single-stage regulation with minimal external components: only input and output 1.0µF ceramic capacitors are required per datasheet recommendations.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.2V ±1% (±2% for VOUT ≤ 2.5V), enabling direct core supply for low-voltage microcontrollers and sensors without external feedback. |
| Max Input Voltage | 18V absolute maximum, supporting unregulated 12V rail or multi-cell battery inputs without pre-regulation. |
| Dropout Voltage | 500mV @ 100mA (typ), allowing 1.2V output from as low as 1.7V input-critical for single Li-ion or dual NiMH operation. |
| Quiescent Current | 1.5–2.5µA @ IOUT = 0A, minimizing standby power loss in always-on metering and weighing scale applications. |
| Current Limit | 200mA min (for VOUT ≤ 2.5V), providing robust short-circuit protection without external current-sense resistors. |
| Thermal Shutdown | Activates at +160°C with +20°C hysteresis, preventing permanent damage during sustained overload or poor PCB heatsinking. |
| ESD Rating | HBM 6000V, ensuring reliability during board handling and assembly in industrial environments. |
Pinout & Package
SOT89 package: 3-pin, surface-mount, thermally enhanced plastic package with exposed tab (EP) connected to GND for improved heat dissipation (θJA = 126°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (VIN) | Input voltage supply | Accepts 3.2–18V DC; requires local 1.0µF ceramic decoupling capacitor within 5mm of pin. |
| 2 (GND) | Ground reference and thermal pad | Primary return path for all currents; EP (exposed pad) must be soldered to large copper pour for thermal performance. |
| 3 (VOUT) | Regulated output | Delivers stable 1.2V ±1%; requires 1.0µF ceramic output capacitor with ESR < 100mΩ for stability. |
Key Features
| Feature | Design Value |
|---|---|
| Wide input voltage range | Supports 3.2V to 18V input-enables single-supply compatibility across USB, 5V logic rails, and 12V industrial buses. |
| Ultra-low quiescent current | 1.5–2.5µA at zero load-extends battery life in portable instruments operating >90% time in sleep mode. |
| Reverse current protection | Blocks >1µA reverse current flow from VOUT to VIN-prevents battery drain when input is disconnected or fails. |
| Low-ESR ceramic capacitor compatible | Stable with 1.0µF X5R/X7R ceramics-eliminates need for costly tantalum or aluminum electrolytics in space-constrained designs. |
| Thermal shutdown with hysteresis | +160°C trip / +140°C recovery-avoids thermal oscillation during intermittent overloads in sealed enclosures. |
Applications
| Battery-Powered Weighing Scales | Portable Medical Instrumentation |
|---|---|
Use Scenario: Precision load-cell signal conditioning in handheld digital scales powered by two AA alkaline cells (1.8–3.2V). IC Role / Device Role / Timing Role: Primary 1.2V analog supply for 24-bit delta-sigma ADC and low-noise op-amps. Use Value: Ultra-low IQ preserves battery runtime >6 months; ±1% accuracy ensures consistent calibration across temperature. |
Use Scenario: Powering sensor front-ends and microcontroller cores in portable blood glucose meters. IC Role / Device Role / Timing Role: Low-noise 1.2V LDO for ADC reference and RF transceiver bias rails. Use Value: Reverse current protection prevents battery leakage when USB charging disconnects; 500mV dropout enables full-scale operation down to 1.7V cell voltage. |
| Industrial Metering Modules | Laptop Subsystem Regulation |
Use Scenario: Secondary regulation for real-time clock (RTC) and non-volatile memory in smart electricity meters. IC Role / Device Role / Timing Role: Standby power source maintaining RTC accuracy during main power interruption. Use Value: 1.5µA quiescent current extends supercapacitor hold-up time to >72 hours; thermal shutdown protects against enclosure overheating. |
Use Scenario: Core voltage supply for embedded controller (EC) or secure element in ultrabook platforms. IC Role / Device Role / Timing Role: Dedicated 1.2V rail isolated from noisy main CPU VRM. Use Value: Excellent line/load regulation (0.05%/V, 0.5%) ensures stable EC operation despite rapid 5V rail fluctuations during USB-C PD negotiation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MCP1700T-1202E/TT (Microchip) | 1.2V fixed, 250mA, 6V max VIN, 1.8µA IQ, SOT23-3 package | Limited to 6V input; unsuitable for 12V industrial or automotive-derived supplies | Select when input never exceeds 6V and board space is constrained-SOT23 footprint saves area but sacrifices thermal performance. |
| TPS7A2012PDBVR (TI) | 1.2V fixed, 300mA, 6V max VIN, 6.5µA IQ, WSON-6 package with EN pin | No reverse current protection; requires external enable control; higher IQ reduces battery life | Choose if system-level enable sequencing is needed and reverse current blocking is handled elsewhere-WSON offers better θJA than SOT89 but lacks EP thermal path. |
Compared with MCP1700T-1202E/TT and TPS7A2012PDBVR, the AP7370-12Y-13 uniquely combines 18V input tolerance, reverse current blocking, and sub-2.5µA quiescent current in a thermally robust SOT89 package-making it the only viable option for 12V-powered portable instrumentation requiring long battery life and fault resilience.
Availability
AP7370-12Y-13 is available at Aetrix Electronics and suitable for battery-powered equipment, portable information appliances, and metering applications requiring stable component supply, long-term lifecycle support, and RoHS-compliant sourcing.
Supply support for AP7370-12Y-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 manufacturer specializing in discrete, analog, and mixed-signal devices for power management, signal integrity, and connectivity applications.
The AP7370 series belongs to Diodes' high-reliability ULDO regulator product line, engineered specifically for portable and battery-critical systems demanding wide-input operation, ultra-low IQ, and integrated protection features.
FAQ
Is AP7370-12Y-13 recommended for new designs?
No-the official Diodes datasheet explicitly states "NOT RECOMMENDED FOR NEW DESIGN" and directs users to migrate to the AP7375. This designation reflects end-of-life planning, not functional obsolescence. Existing designs may continue using AP7370-12Y-13 under Aetrix's continuity program, but new schematics should evaluate AP7375 for long-term supply assurance.
What is the thermal performance of AP7370-12Y-13 in SOT89 package?
The SOT89 package delivers θJA = 126°C/W (typical) and θJC = 26°C/W (typical). With the exposed pad (EP) soldered to ≥1 cm² of 2-oz copper, junction temperature rise is ~32°C at 300mA output with 5V input. Derating is required above +85°C ambient; full 300mA load is only guaranteed up to +70°C ambient per datasheet limits.
Can AP7370-12Y-13 operate with input voltage below 3.2V?
No-the Recommended Operating Conditions specify minimum VIN = 3.2V. Operation below this violates datasheet specifications and risks output instability or dropout failure. For sub-3.2V inputs, consider alternative regulators such as the AP2202K-12 (2.5V min VIN) or discrete LDO solutions with lower VDROP architecture.
Does AP7370-12Y-13 require an enable pin for power sequencing?
No-it has no enable (EN) pin and operates continuously when VIN is within specification. Power sequencing must be managed externally via VIN control. If controlled startup is required, insert a MOSFET switch upstream of VIN or select a pin-compatible alternative like TPS7A20 with integrated enable functionality.
AP7370-12Y-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):
- 1.2V
- 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
AP7370-12Y-13 FAQ
1.How can I place an order for AP7370-12Y-13 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP7370-12Y-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 AP7370-12Y-13 reliable?
The price and inventory of AP7370-12Y-13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP7370-12Y-13 is usually 5 days.
3.What payment methods are accepted for AP7370-12Y-13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP7370-12Y-13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP7370-12Y-13?
AP7370-12Y-13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP7370-12Y-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 AP7370-12Y-13?
For technical support, including AP7370-12Y-13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP7370-12Y-13 requirements.
6.How does Aetrix verify that AP7370-12Y-13 is sourced from the original manufacturer or authorized distributors?
All AP7370-12Y-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 AP7370-12Y-13 meets industry standards.
7.What is the process for return or replacement of AP7370-12Y-13?
All AP7370-12Y-13 units undergo pre-shipment inspection (PSI). If there is an issue with AP7370-12Y-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 AP7370-12Y-13 part is unused and in its original packaging.
Return procedure for AP7370-12Y-13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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