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Diodes Incorporated AP7370-15FDC-7
- Part No.:
- AP7370-15FDC-7
- Manufacturer:
- Diodes Incorporated
- Package:
- 6-UDFN Exposed Pad
- Datasheet:
-
AP7370-15FDC-7.pdf
- Description:
- IC REG LINEAR 1.5V 300MA 6DFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,837
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Product details
Overview
AP7370-15FDC-7 from Diodes Incorporated is a fixed-output 1.5V, 300mA ultra-low dropout (ULDO) linear regulator in U-DFN2020-6 (Type C) package, featuring 18V max input voltage, 500mV dropout at 100mA, ±1% output accuracy, reverse current protection, and 1.5µA quiescent current - designed for power rail regulation in space-constrained portable instrumentation and battery-powered metering systems.
For engineers reviewing the AP7370-15FDC-7 datasheet, AP7370-15FDC-7 pinout, AP7370-15FDC-7 application, or AP7370-15FDC-7 equivalent, this page delivers verified technical context, validated pin functions, real-world use cases in weighing scales and USB-powered devices, and actionable alternative selection guidance - all grounded in Diodes' DS41820 Rev. 2–3 specification.
Technical Context
The AP7370-15FDC-7 integrates a precision voltage reference, error amplifier, and current-limit circuit to maintain stable 1.5V output across 3.2–18V input range. Its internal architecture enables operation with low-ESR ceramic capacitors and provides thermal shutdown at +160°C with +20°C hysteresis.
It delivers 0.05%/V line regulation and 0.5% load regulation over full temperature range (−40°C to +125°C), while its reverse current protection prevents backfeed when VOUT > VIN - critical for multi-rail systems with shared ground paths and hot-swap scenarios.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.5V ±1% (98–102% tolerance) ensures stable core logic or sensor biasing without external feedback network. |
| Max Input Voltage | 18V absolute maximum supports direct connection to unregulated 12V rails or automotive-derived supplies with transient margin. |
| Dropout Voltage | 500mV @ 100mA enables regulation down to VIN = 2.0V - critical for extending battery runtime in single-cell LiFePO₄ or dual-cell alkaline systems. |
| Quiescent Current | 1.5µA typical at zero load minimizes standby power loss in always-on metering and IoT edge nodes. |
| Current Limit | 200mA min for VOUT ≤ 2.5V provides robust short-circuit protection without latch-up, preserving system-level fault containment. |
| Thermal Shutdown | +160°C activation with +20°C hysteresis prevents thermal runaway during sustained overload or poor PCB heatsinking. |
| Reverse Current Protection | Active blocking prevents VOUT from sourcing current into VIN - eliminates need for external blocking diode in backup-supply configurations. |
Pinout & Package
AP7370-15FDC-7 uses the U-DFN2020-6 (Type C) package: 2.0mm × 2.0mm × 0.6mm body, 0.65mm pitch, exposed thermal pad (EP) connected to GND for enhanced thermal performance (θJA = 54°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VIN | Main input supply connection; accepts 3.2–18V DC with transient tolerance up to 20V. |
| 2 | GND | Power ground reference; tied internally to EP for optimal thermal conduction and noise rejection. |
| 3 | VOUT | Regulated 1.5V output; requires ≥1.0µF ceramic capacitor (X5R/X7R) placed within 2mm for stability. |
| 4 | NC | No-connect terminal - must be left floating or grounded per layout guidelines; no internal connection. |
| 5 | NC | No-connect terminal - electrically isolated; no routing or soldering required. |
| 6 | NC | No-connect terminal - unused pad; may be used as additional thermal relief if connected to GND plane. |
Key Features
| Feature | Design Value |
|---|---|
| Wide Input Range | Operates from 3.2V to 18V - eliminates need for pre-regulation stages in industrial 12V or USB PD adapter applications. |
| Ultra-Low IQ | 1.5µA ground current at zero load extends shelf life and battery life in portable test equipment with sleep modes. |
| Ceramic Cap Compatible | Stable with ≥1.0µF X5R/X7R MLCCs - reduces BOM count and board area vs. tantalum or electrolytic alternatives. |
| Reverse Current Blocking | Prevents backflow from VOUT to VIN during power sequencing or brownout - avoids unintended powering of upstream circuits. |
| Thermal & Short-Circuit Protection | Auto-recovery thermal shutdown and foldback current limit enable safe operation under sustained overload without external supervision. |
Applications
| Weighing Scales | Portable Multimeters |
|---|---|
|
Use Scenario: Precision analog front-end (AFE) and microcontroller core supply in handheld digital scales operating from two AA batteries. IC Role / Device Role / Timing Role: Primary 1.5V LDO delivering clean, low-noise power to 24-bit sigma-delta ADC and low-power MCU. Use Value: 0.5% load regulation and ±100ppm/°C tempco ensure consistent ADC reference stability across battery discharge and ambient temperature shifts. |
Use Scenario: Dual-rail power management in battery-operated multimeters requiring isolated 1.5V for display driver and analog circuitry. IC Role / Device Role / Timing Role: Fixed-output regulator supplying 1.5V to LCD controller and op-amp signal conditioning stage. Use Value: Reverse current protection prevents display ghosting during battery swap; 500mV dropout preserves measurement uptime until battery reaches 1.8V. |
| USB-Powered Sensors | Industrial Data Loggers |
|
Use Scenario: Powering MEMS accelerometers and I²C interface ICs from USB 5V bus via compact step-down regulation. IC Role / Device Role / Timing Role: Compact ULDO converting USB 5V to 1.5V for low-voltage sensor bias and digital logic. Use Value: U-DFN2020-6 footprint fits tight 2-layer PCB layouts; 1.5µA IQ enables >1-year battery life in wake-on-motion mode. |
Use Scenario: Backup power rail for RTC and SRAM in ruggedized environmental loggers powered by solar-charged Li-ion cells. IC Role / Device Role / Timing Role: Always-on 1.5V regulator maintaining timekeeping and volatile memory during main power interruptions. Use Value: Thermal shutdown and reverse current blocking prevent data corruption during thermal stress or battery reversal events. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar fixed-output LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MCP1700T-1502E/MB | 1.5V, 250mA, 6V max input, 1.6µA IQ, SOT23-3 package - lacks reverse current protection and thermal shutdown. | Suitable only for low-risk, low-power consumer wearables with strict cost targets and no fault tolerance requirements. | Select only if input voltage never exceeds 6V and system-level protection is implemented externally. |
| AP7361C-15FDC-7 | 1.5V, 300mA, 6V max input, 500mV dropout, same U-DFN2020-6 package - lower input voltage range but improved PSRR (65dB @ 1kHz). | Better for noise-sensitive analog sensors powered from regulated 5V sources where EMI immunity matters more than wide-input flexibility. | Prefer when supply is pre-regulated and high-frequency ripple rejection is prioritized over 12V/18V compatibility. |
Compared with MCP1700T-1502E/MB, AP7370-15FDC-7 adds reverse current blocking and thermal safety for unattended operation; versus AP7361C-15FDC-7, it trades PSRR for 3× higher input voltage headroom - making it uniquely suited for direct connection to raw 12V industrial or automotive-derived rails.
Availability
AP7370-15FDC-7 is available at Aetrix Electronics and suitable for portable instrumentation, battery-powered metering, and USB-powered sensor modules requiring stable component supply with long-term manufacturability assurance.
Supply support for AP7370-15FDC-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 analog ICs, specializing in high-reliability power management, signal integrity, and protection solutions for industrial, computing, and consumer markets.
The AP7370 series belongs to Diodes' ultra-low dropout regulator product line, engineered specifically for space-constrained, battery-sensitive applications demanding wide input range, minimal quiescent power, and robust fault protection - not general-purpose LDO use.
FAQ
Is AP7370-15FDC-7 recommended for new designs?
No - Diodes explicitly marks AP7370-15FDC-7 as "NOT RECOMMENDED FOR NEW DESIGN" in DS41820 Rev. 2–3. It is superseded by the AP7375 series, which offers identical functionality with improved thermal performance and extended lifetime support. Existing designs may continue using AP7370-15FDC-7, but new projects should evaluate AP7375-15FDC-7.
What is the minimum input voltage required for regulation at 1.5V output?
The AP7370-15FDC-7 requires VIN ≥ 3.2V for guaranteed operation per Recommended Operating Conditions. This is due to internal reference and error amplifier headroom - not just dropout voltage. At 1.5V output, 500mV dropout implies theoretical minimum VIN = 2.0V, but datasheet specifies 3.2V as absolute minimum for full specification compliance across temperature and load.
Can AP7370-15FDC-7 drive a 300mA load continuously?
Yes - the device is rated for 300mA continuous output current, but thermal limits apply. In U-DFN2020-6 package with standard 2-layer PCB (1in² 1oz Cu), junction temperature rises ~54°C/W × 300mA × 0.5V dropout ≈ 8.1°C above ambient. Full 300mA operation is thermally sustainable up to +117°C ambient before reaching +125°C TJ limit.
Does AP7370-15FDC-7 require an input capacitor?
Yes - a minimum 1.0µF ceramic capacitor (X5R/X7R) is required at VIN per datasheet Section 8.2. It stabilizes input impedance, suppresses high-frequency noise from upstream converters, and prevents oscillation during fast load transients. Omission risks instability and increased output ripple, especially when sourced from switching regulators or long PCB traces.
AP7370-15FDC-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):
- 1.5V
- 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)
AP7370-15FDC-7 FAQ
1.How can I place an order for AP7370-15FDC-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP7370-15FDC-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 AP7370-15FDC-7 reliable?
The price and inventory of AP7370-15FDC-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP7370-15FDC-7 is usually 5 days.
3.What payment methods are accepted for AP7370-15FDC-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP7370-15FDC-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP7370-15FDC-7?
AP7370-15FDC-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP7370-15FDC-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 AP7370-15FDC-7?
For technical support, including AP7370-15FDC-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP7370-15FDC-7 requirements.
6.How does Aetrix verify that AP7370-15FDC-7 is sourced from the original manufacturer or authorized distributors?
All AP7370-15FDC-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 AP7370-15FDC-7 meets industry standards.
7.What is the process for return or replacement of AP7370-15FDC-7?
All AP7370-15FDC-7 units undergo pre-shipment inspection (PSI). If there is an issue with AP7370-15FDC-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 AP7370-15FDC-7 part is unused and in its original packaging.
Return procedure for AP7370-15FDC-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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