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Diodes Incorporated AP7370-50FDC-7
- Part No.:
- AP7370-50FDC-7
- Manufacturer:
- Diodes Incorporated
- Package:
- 6-UDFN Exposed Pad
- Datasheet:
-
AP7370-50FDC-7.pdf
- Description:
- IC REG LINEAR 5V 300MA 6DFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,357
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Product details
Overview
AP7370-50FDC-7 from Diodes Incorporated is a 5.0V 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 450mV dropout at 100mA load, and draws only 1.5µA ground current at zero load-enabling long battery life in portable instrumentation and USB-powered devices.
For engineers reviewing the AP7370-50FDC-7 datasheet, AP7370-50FDC-7 pinout, AP7370-50FDC-7 application, or AP7370-50FDC-7 equivalent, key selection criteria include its 5.0V fixed output, 18V max input rating, thermal shutdown behavior, reverse current protection, and compatibility with low-ESR ceramic capacitors in space-constrained layouts.
Technical Context
The AP7370-50FDC-7 integrates a precision voltage reference, error amplifier, resistor network for fixed 5.0V output, current-limit circuit (350mA typical), chip enable logic, and reverse-current blocking. Its internal architecture supports stable regulation under fast load transients and wide input variation without external compensation.
Thermal shutdown activates at +160°C with +20°C hysteresis; dropout voltage remains valid only for VOUT ≥ 2.8V per datasheet specification. The device uses no external feedback components-output is factory-trimmed and non-adjustable.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 5.0V ±1% (typical accuracy over -40°C to +85°C) |
| Max Input Voltage | 18V - enables direct connection to 12V rails or multi-cell battery stacks |
| Dropout Voltage | 450mV @ 100mA - sustains regulation down to VIN = 5.45V |
| Quiescent Current | 1.5µA @ IOUT = 0A - minimizes standby power loss in always-on systems |
| Current Limit | 350mA (min) - provides robust short-circuit protection without external foldback |
| Line Regulation | 0.05%/V - maintains tight output stability across full input range |
| Thermal Resistance θJA | 54°C/W (U-DFN2020-6) - enables 300mA operation up to +125°C ambient with minimal heatsinking |
Pinout & Package
AP7370-50FDC-7 is housed in a 2.0mm × 2.0mm × 0.6mm U-DFN2020-6 (Type C) package with wettable flank leads and exposed thermal pad (EP) connected internally to GND. The package supports reflow soldering per JEDEC J-STD-020 and achieves 54°C/W junction-to-ambient thermal resistance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VIN | Main input supply connection; accepts 3.2V–18V; requires local 1µF ceramic decoupling |
| 2 | GND | Analog/digital ground reference; tied to EP for optimal thermal and noise performance |
| 3 | NC | No-connect terminal - must be left floating or grounded per layout best practice |
| 4 | VOUT | Regulated 5.0V output; stable with 1µF ceramic capacitor; reverse-current protected |
| 5 | NC | No-connect terminal - must be left floating or grounded per layout best practice |
| 6 | NC | No-connect terminal - must be left floating or grounded per layout best practice |
| EP | GND | Exposed thermal pad - must be soldered to PCB ground plane for thermal and EMI integrity |
Key Features
| Feature | Design Value |
|---|---|
| Wide input range | 3.2V–18V - eliminates need for pre-regulation in automotive or industrial 12V systems |
| Reverse current protection | Blocks backfeed from VOUT to VIN - prevents battery drain when input is disconnected |
| Low-ESR capacitor compatible | Stable with ≥1µF X5R/X7R ceramic - reduces BOM count and board area vs. tantalum solutions |
| Ultra-low quiescent current | 1.5µA at zero load - extends shelf life and runtime in battery-backed metering applications |
| Thermal shutdown + hysteresis | +160°C trip with +20°C hysteresis - prevents latch-up and enables safe auto-recovery |
Applications
| Metering Systems | Weighing Scales |
|---|---|
|
Use Scenario: Precision analog front-end power for 24-bit ADCs and reference buffers in handheld multimeters and energy meters. IC Role / Device Role / Timing Role: Primary 5.0V LDO supplying ADC, microcontroller core, and sensor interface with <0.5% load regulation. Use Value: Enables ±0.01% measurement accuracy by suppressing supply-induced gain/offset drift across 1mA–300mA load range. |
Use Scenario: Stable excitation and signal conditioning power in battery-operated platform scales with strain-gauge bridges. IC Role / Device Role / Timing Role: Fixed 5.0V rail for bridge amplifier, sigma-delta modulator, and low-power MCU sleep/wake cycles. Use Value: Maintains 0.005% line regulation over 3.2V–18V input swing, eliminating calibration drift during battery discharge. |
| Portable Information Appliances | Laptop Peripheral Modules |
|
Use Scenario: Power management for compact barcode scanners, RFID readers, and handheld POS terminals. IC Role / Device Role / Timing Role: Single-chip 5.0V regulator replacing discrete LDO + capacitor arrays in 6mm² footprint. Use Value: Reduces solution size by 40% versus SOT23 alternatives while delivering 300mA peak current for motor drivers and LEDs. |
Use Scenario: Auxiliary 5.0V rail for USB-C PD accessory detection ICs and Type-C port controllers in ultrabooks. IC Role / Device Role / Timing Role: Always-on LDO powering USB PD policy engine during system suspend (S3/S5 states). Use Value: 1.5µA quiescent current extends platform standby time beyond 30 days on single-cell Li-ion battery. |
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 |
|---|---|---|---|
| MCP1703T-5002E/MB | 5.0V output, 250mA, 600mV dropout @ 100mA, 2.5µA IQ, SOT23-5 | Lower current capability and higher dropout limit device use in <200mA, high-temperature environments where thermal margin is constrained | Select when board space allows SOT23-5 and thermal resistance >155°C/W is acceptable |
| TPS7A2050PDBVR | 5.0V output, 300mA, 175mV dropout @ 100mA, 6.5µA IQ, WSON-6 | Lower dropout and higher IQ enable tighter VIN–VOUT margins but require larger input capacitance for stability | Select when input voltage is ≤6.0V and ultra-low dropout is mandatory for battery end-of-life operation |
Compared with MCP1703T-5002E/MB, AP7370-50FDC-7 delivers 50mA higher current and 100mV lower dropout in half the footprint; versus TPS7A2050PDBVR, it trades 275mV higher dropout for 5µA lower quiescent current and guaranteed reverse-current blocking-critical for multi-rail battery systems.
Availability
AP7370-50FDC-7 is available at Aetrix Electronics and suitable for portable instrumentation, battery-powered weighing equipment, and USB peripheral modules requiring stable component supply with RoHS 3 and halogen-free compliance.
Supply support for AP7370-50FDC-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 power management, signal integrity, and protection solutions for industrial, computing, and consumer markets.
The AP7370 series belongs to Diodes' high-voltage ULDO product line, engineered specifically for USB-powered and multi-cell battery applications demanding wide VIN range, low IQ, and robust protection features in sub-2mm² packages.
FAQ
Is AP7370-50FDC-7 recommended for new designs?
No. Diodes Incorporated explicitly marks AP7370 as "NOT RECOMMENDED FOR NEW DESIGN" and recommends AP7375 as its functional successor. AP7370-50FDC-7 remains available for legacy support and existing production, but new designs should evaluate AP7375 for improved specs and long-term supply assurance.
What is the role of NC pins in U-DFN2020-6 package?
Pins 3, 5, and 6 are No-Connect (NC) terminals in the fixed-output AP7370-50FDC-7. They are not bonded internally and must be left unconnected or tied to GND per PCB layout guidelines to minimize parasitic coupling and ensure thermal pad solder joint integrity.
Does AP7370-50FDC-7 require an input capacitor?
Yes. A minimum 1.0µF X5R/X7R ceramic capacitor is required at VIN per datasheet Section 7.1. This stabilizes input impedance, suppresses high-frequency noise from upstream sources, and prevents oscillation during transient load steps-especially critical with 18V max input.
How does reverse current protection function in AP7370-50FDC-7?
AP7370-50FDC-7 integrates a MOSFET-based reverse-current blocking circuit between VIN and VOUT. When VIN falls below VOUT (e.g., during battery swap or input disconnect), the internal pass device turns off, limiting reverse current to <1µA-preventing backfeed into upstream supplies or battery depletion.
AP7370-50FDC-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):
- 5V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.55V @ 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:
- U-DFN2020-6 (Type C)
AP7370-50FDC-7 FAQ
1.How can I place an order for AP7370-50FDC-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP7370-50FDC-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 AP7370-50FDC-7 reliable?
The price and inventory of AP7370-50FDC-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP7370-50FDC-7 is usually 5 days.
3.What payment methods are accepted for AP7370-50FDC-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP7370-50FDC-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP7370-50FDC-7?
AP7370-50FDC-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP7370-50FDC-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 AP7370-50FDC-7?
For technical support, including AP7370-50FDC-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP7370-50FDC-7 requirements.
6.How does Aetrix verify that AP7370-50FDC-7 is sourced from the original manufacturer or authorized distributors?
All AP7370-50FDC-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 AP7370-50FDC-7 meets industry standards.
7.What is the process for return or replacement of AP7370-50FDC-7?
All AP7370-50FDC-7 units undergo pre-shipment inspection (PSI). If there is an issue with AP7370-50FDC-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 AP7370-50FDC-7 part is unused and in its original packaging.
Return procedure for AP7370-50FDC-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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