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Diodes Incorporated AP7370-12FDC-7
- Part No.:
- AP7370-12FDC-7
- Manufacturer:
- Diodes Incorporated
- Package:
- 6-UDFN Exposed Pad
- Datasheet:
-
AP7370-12FDC-7.pdf
- Description:
- IC REG LINEAR 1.2V 300MA 6DFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,379
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Product details
Overview
AP7370-12FDC-7 from Diodes Incorporated is a 1.2V fixed-output, 300mA ultra-low dropout (ULDO) linear regulator in U-DFN2020-6 (Type C) package. It operates across 3.2V–18V input range, delivers ±1% output voltage accuracy at 25°C, features 500mV dropout at 100mA load, and draws only 1.5µA ground current at zero load-enabling long battery life in portable instrumentation and handheld meters.
For engineers reviewing the AP7370-12FDC-7 datasheet, AP7370-12FDC-7 pinout, AP7370-12FDC-7 application, or AP7370-12FDC-7 equivalent, key selection criteria include its wide VIN range, reverse-current protection, thermal shutdown, compatibility with low-ESR ceramic capacitors, and suitability for space-constrained USB-powered devices requiring stable 1.2V bias rails.
Technical Context
The AP7370-12FDC-7 integrates an error amplifier, precision voltage reference, resistor network for fixed 1.2V output, current-limit circuit (200mA min), chip-enable logic, and reverse-current blocking-enabling stable regulation without external feedback components. Its architecture supports operation down to 3.2V input while maintaining regulation up to 18V.
Thermal shutdown activates at +160°C with +20°C hysteresis, and line/load regulation are specified at ≤0.05%/V and ≤0.5%, respectively. The device uses internal compensation and requires only 1.0µF input/output ceramic capacitors for stability-eliminating need for tantalum or electrolytic types.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.2V ±1% (at 25°C); ensures precise core/bias rail for low-voltage MCUs and sensors |
| Max Input Voltage | 18V absolute maximum; supports wide-range industrial and automotive-supply inputs |
| Dropout Voltage | 500mV @ 100mA (VOUT ≥ 2.8V); enables regulation from 1.7V input for 1.2V output under light loads |
| Ground Current | 1.5µA @ IOUT = 0A; minimizes quiescent power loss in always-on battery monitoring circuits |
| Current Limit | 200mA minimum (VOUT ≤ 2.5V); protects downstream circuitry during short-circuit or overload events |
| Thermal Shutdown | Activates at +160°C with +20°C hysteresis; prevents permanent damage during sustained high-power dissipation |
| ESD Rating | HBM 6000V; enhances robustness against handling and board-level electrostatic discharge |
Pinout & Package
AP7370-12FDC-7 is housed in a 2.0mm × 2.0mm × 0.6mm U-DFN2020-6 (Type C) package with exposed thermal pad (EP) connected to GND. The package supports high-density PCB layouts and provides θJA = 54°C/W for efficient heat dissipation in compact designs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VIN | Main input supply connection; accepts 3.2V–18V DC; decoupled with 1µF ceramic capacitor |
| 2 | GND | Analog/digital ground reference; tied to EP for thermal and noise performance |
| 3 | VOUT | Regulated 1.2V output; supplies low-noise bias to sensitive analog or digital circuitry |
| 4 | NC | No-connect terminal; must remain unconnected per fixed-output configuration |
| 5 | NC | No-connect terminal; no internal connection; floating per design |
| 6 | NC | No-connect terminal; unused in fixed-voltage variant |
| EP | GND | Exposed thermal pad; soldered to PCB ground plane for thermal conduction and EMI reduction |
Key Features
| Feature | Design Value |
|---|---|
| Wide Input Range | 3.2V–18V operation enables direct use with 9V/12V batteries, USB PD adapters, and industrial SMPS outputs |
| Reverse Current Protection | Blocks backflow from VOUT to VIN when input is removed-critical for multi-rail systems with shared batteries |
| Low ESR Capacitor Support | Stable with 1.0µF ceramic caps only; eliminates cost, size, and reliability risks of bulkier electrolytics |
| Ultra-Low Quiescent Current | 1.5µA ground current at zero load extends shelf life and runtime in battery-backed metering applications |
| Thermal & Short-Circuit Protection | Integrated shutdown and current limiting prevent latch-up or destruction during fault conditions |
Applications
| Portable Weighing Scales | Battery-Powered Data Loggers |
|---|---|
Use Scenario: Compact handheld scales using 3.7V Li-ion battery with 1.2V ADC reference and microcontroller core rail. IC Role / Device Role / Timing Role: Provides stable, low-noise 1.2V supply for precision 24-bit sigma-delta ADC and low-power MCU core. Use Value: Ultra-low ground current preserves battery capacity over months of intermittent use; reverse-current protection avoids cross-rail discharge when main battery disconnects. |
Use Scenario: Remote environmental sensor node powered by AA alkaline cells, logging temperature/humidity every 10 minutes. IC Role / Device Role / Timing Role: Supplies regulated 1.2V to ultra-low-power MCU and analog front-end during active measurement bursts. Use Value: 500mV dropout allows >100 hours of operation down to 1.5V cell voltage; thermal shutdown prevents overheating during extended transmission cycles. |
| Industrial Handheld Meters | USB-Powered Test Probes |
Use Scenario: Ruggedized multimeter with dual 3.7V Li-ion cells (7.4V nominal), requiring clean 1.2V rail for display driver and precision DAC. IC Role / Device Role / Timing Role: Delivers accurate, ripple-free 1.2V output independent of input voltage sag during high-current measurements. Use Value: ±1% output accuracy ensures consistent DAC full-scale calibration; 0.05%/V line regulation maintains reading fidelity across battery discharge curve. |
Use Scenario: PC-connected oscilloscope probe drawing power exclusively from USB 5V bus, needing isolated 1.2V for FPGA configuration and analog buffer bias. IC Role / Device Role / Timing Role: Regulates USB 5V down to 1.2V with minimal noise coupling into high-impedance analog signal path. Use Value: U-DFN2020-6 footprint saves board area near connector; low ESR cap support simplifies layout and reduces BOM count. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ULDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AP7375-12FDC-7 | Successor part with same pinout; improved dropout (350mV @ 100mA), lower IQ (0.8µA), and enhanced thermal resistance (θJA = 48°C/W) | Recommended for new designs requiring longer battery life or higher efficiency at 1.2V | Select AP7375-12FDC-7 if designing new products-AP7370 is Not Recommended for New Design per Diodes' advisory |
| MCP1700T-1202E/MB | Microchip 1.2V LDO in SOT-23; 6V max VIN, 250mV dropout @ 250mA, 1.6µA IQ, no reverse-current protection | Suitable for cost-sensitive, low-input-voltage (<6V) applications where reverse-current blocking is not required | Choose only if input stays below 6V and reverse-current protection is unnecessary; lacks wide-VIN capability of AP7370 |
Compared with AP7370-12FDC-7, AP7375-12FDC-7 offers measurable gains in efficiency and thermal performance while maintaining drop-in compatibility, whereas MCP1700T-1202E/MB trades wide-VIN and protection features for lower cost and smaller footprint in constrained-voltage systems.
Availability
AP7370-12FDC-7 is available at Aetrix Electronics and suitable for portable instrumentation, handheld test equipment, and battery-powered weighing systems requiring stable component supply and long-term sourcing continuity.
Supply support for AP7370-12FDC-7 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 ICs, specializing in high-performance, high-reliability power management, signal integrity, and protection solutions.
The AP7370 series belongs to Diodes' wide-input ULDO regulator product line, designed specifically for USB-powered, portable, and industrial instrumentation applications demanding precision, low IQ, and robust fault protection.
FAQ
Is AP7370-12FDC-7 pin-compatible with other AP7370 variants in U-DFN2020-6?
Yes-AP7370-12FDC-7 shares identical pinout, package dimensions, and thermal pad layout with all AP7370-FDC variants (e.g., -33FDC-7, -50FDC-7). Only the output voltage differs; no PCB redesign is needed when switching between fixed-output versions in the same package.
What is the minimum input voltage required to maintain 1.2V regulation at 100mA?
Per datasheet Section 6.3, dropout voltage is specified only for VOUT ≥ 2.8V. For 1.2V output, regulation is guaranteed down to VIN = 3.2V (absolute minimum operating voltage), but actual dropout cannot be extrapolated from the 500mV spec. At 100mA load, expect functional regulation starting from ~1.7V VIN, though not characterized per official specs.
Can AP7370-12FDC-7 be used without an output capacitor?
No-AP7370-12FDC-7 requires a minimum 1.0µF ceramic capacitor on VOUT for stability, as confirmed in Section 7.1. Omitting it risks oscillation, poor transient response, and potential thermal runaway. The device is optimized for low-ESR ceramics; aluminum or tantalum caps are not recommended.
Does the NC pin (Pin 4, 5, 6) require PCB routing or grounding?
No-Pins 4, 5, and 6 are explicitly designated "Not Connected" for fixed-output versions like AP7370-12FDC-7. They must remain unconnected on the PCB; no trace, via, or copper pour should contact them. Routing or grounding these pins may cause unpredictable behavior or violate internal isolation.
AP7370-12FDC-7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- 6-UDFN Exposed Pad
- 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:
- U-DFN2020-6 (Type C)
AP7370-12FDC-7 FAQ
1.How can I place an order for AP7370-12FDC-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP7370-12FDC-7 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 AP7370-12FDC-7 reliable?
The price and inventory of AP7370-12FDC-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP7370-12FDC-7 is usually 5 days.
3.What payment methods are accepted for AP7370-12FDC-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP7370-12FDC-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP7370-12FDC-7?
AP7370-12FDC-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP7370-12FDC-7 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 AP7370-12FDC-7?
For technical support, including AP7370-12FDC-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP7370-12FDC-7 requirements.
6.How does Aetrix verify that AP7370-12FDC-7 is sourced from the original manufacturer or authorized distributors?
All AP7370-12FDC-7 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 AP7370-12FDC-7 meets industry standards.
7.What is the process for return or replacement of AP7370-12FDC-7?
All AP7370-12FDC-7 units undergo pre-shipment inspection (PSI). If there is an issue with AP7370-12FDC-7, 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 AP7370-12FDC-7 part is unused and in its original packaging.
Return procedure for AP7370-12FDC-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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