My Inquiry
My Account
Diodes Incorporated AP7370-18FDC-7
- Part No.:
- AP7370-18FDC-7
- Manufacturer:
- Diodes Incorporated
- Package:
- 6-UDFN Exposed Pad
- Datasheet:
-
AP7370-18FDC-7.pdf
- Description:
- IC REG LINEAR 1.8V 300MA 6DFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,049
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
AP7370-18FDC-7 from Diodes Incorporated is a fixed-output 1.8V, 300mA ultra-low dropout (ULDO) linear regulator in U-DFN2020-6 (Type C) package, featuring 500mV dropout at 100mA, ±1% output voltage accuracy (for VOUT > 2.5V), 1.5–2.5µA quiescent current, and reverse current protection - designed for power rail regulation in space-constrained portable instrumentation and battery-powered metering systems.
For engineers reviewing the AP7370-18FDC-7 datasheet, AP7370-18FDC-7 pinout, AP7370-18FDC-7 application, or AP7370-18FDC-7 equivalent, this page delivers verified electrical specs, thermal performance data, package-specific layout guidance, real-world load transient behavior, and validated alternative options for low-noise, wide-input-voltage LDO selection.
Technical Context
The AP7370-18FDC-7 integrates a precision voltage reference, error amplifier, and resistor network to maintain stable 1.8V output across input voltages from 3.2V to 18V. Its internal current limit circuit activates at 200mA (for VOUT ≤ 2.5V), and thermal shutdown triggers at +160°C with +20°C hysteresis.
Designed for ceramic capacitor compatibility, it achieves excellent line regulation (0.05%/V) and load regulation (0.5%) while delivering ultra-low ground current - just 1.5µA at zero load and ≤300µA at full 300mA output - enabling long battery life in always-on portable devices.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.8V ±2% (guaranteed over -40°C to +125°C junction temp) |
| Max Input Voltage | 18V (supports single-cell LiFePO₄, multi-cell alkaline, or industrial 12V rails) |
| Dropout Voltage | 500mV @ 100mA (enables regulation down to VIN = 2.3V for 1.8V output) |
| Quiescent Current | 1.5–2.5µA (minimizes standby power loss in battery-backed systems) |
| Current Limit | 200mA (protects IC and source during short-circuit or overload) |
| Thermal Shutdown | +160°C activation with +20°C hysteresis (prevents permanent damage under sustained overload) |
| Reverse Current Protection | Integrated (blocks backfeed from VOUT to VIN when input is absent or low) |
Pinout & Package
U-DFN2020-6 (Type C) is a 2.0mm × 2.0mm, 0.65mm profile, thermally enhanced leadless package with exposed pad (EP) for improved heat dissipation. It supports high-density PCB layouts and offers θJA = 54°C/W - significantly lower than SOT23 (205°C/W) or SOT25 (155°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VIN | Main input supply connection; accepts 3.2–18V DC; requires local 1µF ceramic decoupling |
| 2 | GND | Analog ground reference; must be connected to EP (exposed pad) for optimal thermal and electrical performance |
| 3 | VOUT | Regulated 1.8V output; stable with ≥1µF ceramic capacitor; low noise suitable for ADC/Sensor rails |
| 4 | NC | No connect - internally unconnected; may be left floating or tied to GND per layout best practice |
| 5 | NC | No connect - internally unconnected; no electrical function |
| 6 | NC | No connect - internally unconnected; no electrical function |
| EP | GND | Exposed thermal pad - must be soldered to PCB ground plane for thermal management and EMI reduction |
Key Features
| Feature | Design Value |
|---|---|
| Wide input range (3.2–18V) | Eliminates need for pre-regulation stages in multi-battery or industrial supply environments |
| Ultra-low IQ (1.5µA) | Extends shelf life and runtime in coin-cell or energy-harvesting applications |
| Reverse current protection | Prevents VOUT from back-driving VIN during hot-swap or partial-power-down sequences |
| Low ESR ceramic capacitor compatible | Reduces BOM cost and board area vs. tantalum; enables fast transient response without stability risk |
| Thermal shutdown + hysteresis | Enables safe recovery after fault without manual reset or external supervision circuitry |
Applications
| Portable Weighing Scales | Metering Data Loggers |
|---|---|
Use Scenario: Battery-powered digital scale using 24-bit sigma-delta ADC and low-power MCU. IC Role / Device Role / Timing Role: Supplies clean 1.8V reference rail to ADC and sensor interface, rejecting battery voltage sag during weighing cycles. Use Value: ±2% output accuracy and 0.5% load regulation ensure consistent LSB resolution across 0–100% battery discharge. |
Use Scenario: Industrial electricity meter with isolated RS-485 interface and real-time clock. IC Role / Device Role / Timing Role: Powers RTC and metrology ASIC from main 3.3V rail or backup coin cell via 18V-tolerant input. Use Value: 18V max input allows direct connection to meter's auxiliary supply; 200mA current limit prevents latch-up during surge events. |
| Laptop Subsystem Sensors | Handheld Test Equipment |
Use Scenario: Ambient light, temperature, and humidity sensors on ultrabook motherboard. IC Role / Device Role / Timing Role: Provides low-noise 1.8V bias to analog front-end and I²C interface logic. Use Value: 500mV dropout enables operation down to 2.3V input - critical during battery brownout conditions without resetting sensor firmware. |
Use Scenario: Portable multimeter with LCD, microcontroller, and analog measurement circuitry. IC Role / Device Role / Timing Role: Regulates 1.8V for display controller and precision op-amps from variable alkaline/USB input. Use Value: Reverse current protection prevents battery drain when USB is disconnected but display remains active. |
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-1802E/TT (Microchip) | 250mA rating, 6µA IQ, 1.8V ±2%, 6V max input | Limited to ≤6V input; unsuitable for 12V industrial or multi-cell battery inputs | Choose only if system VIN never exceeds 6V and ultra-low IQ is secondary to cost |
| TPS7A2018PDQNR (TI) | 300mA rating, 6.5µA IQ, 1.8V ±1%, 6V max input, enable pin | No 18V input support; requires external enable control; higher IQ than AP7370 | Select when enable functionality is required and input is strictly ≤6V; avoid for wide-VIN designs |
Compared with MCP1700T-1802E/TT and TPS7A2018PDQNR, the AP7370-18FDC-7 uniquely supports up to 18V input while maintaining sub-3µA quiescent current - making it the only viable option among the three for direct regulation from unregulated 12V supplies or stacked battery packs without intermediate buck conversion.
Availability
AP7370-18FDC-7 is available at Aetrix Electronics and suitable for portable instrumentation, battery-powered metering, and handheld test equipment requiring stable component supply, long-lifecycle availability, and RoHS-compliant packaging.
Supply support for AP7370-18FDC-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 LDO portfolio, engineered specifically for USB-powered, portable, and battery-operated applications where wide input range, ultra-low IQ, and robust protection features are mandatory.
FAQ
What is the minimum input voltage required for AP7370-18FDC-7 to regulate 1.8V output?
The AP7370-18FDC-7 requires a minimum input voltage of 3.2V to maintain regulation, as specified in Recommended Operating Conditions. This ensures sufficient headroom for the 500mV dropout voltage and internal circuit biasing - meaning it cannot regulate from a fully discharged 2.4V Li-ion cell, but works reliably from fresh alkaline (1.5V × 2 = 3.0V) or LiFePO₄ (3.2V nominal) sources.
Does AP7370-18FDC-7 require an external enable signal to operate?
No - the AP7370-18FDC-7 has no enable pin and operates continuously when VIN is within specification (3.2–18V). It lacks active shutdown control; power state is managed solely by presence of input voltage. For applications requiring controlled start-up, an external MOSFET switch on VIN is recommended.
Can AP7370-18FDC-7 drive a 300mA load continuously in U-DFN2020-6 package?
Yes - the device is rated for 300mA continuous output, but thermal limits apply. With θJA = 54°C/W and max TJ = +150°C, ambient temperature must stay below +90°C at full load (assuming 1.8V output and 18V input yields ~3.6W dissipation). PCB copper area and EP soldering are critical to sustain this current reliably.
Is AP7370-18FDC-7 pin-compatible with other AP7370 variants in U-DFN2020-6?
Yes - all AP7370 variants in FDC package (e.g., AP7370-33FDC-7, AP7370-50FDC-7) share identical pinout, footprint, and thermal pad layout. Only the output voltage differs; no PCB redesign is needed when changing fixed-output versions within the same package.
AP7370-18FDC-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):
- 1.8V
- 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)
AP7370-18FDC-7 FAQ
1.How can I place an order for AP7370-18FDC-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP7370-18FDC-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 AP7370-18FDC-7 reliable?
The price and inventory of AP7370-18FDC-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP7370-18FDC-7 is usually 5 days.
3.What payment methods are accepted for AP7370-18FDC-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP7370-18FDC-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP7370-18FDC-7?
AP7370-18FDC-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP7370-18FDC-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 AP7370-18FDC-7?
For technical support, including AP7370-18FDC-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP7370-18FDC-7 requirements.
6.How does Aetrix verify that AP7370-18FDC-7 is sourced from the original manufacturer or authorized distributors?
All AP7370-18FDC-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 AP7370-18FDC-7 meets industry standards.
7.What is the process for return or replacement of AP7370-18FDC-7?
All AP7370-18FDC-7 units undergo pre-shipment inspection (PSI). If there is an issue with AP7370-18FDC-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 AP7370-18FDC-7 part is unused and in its original packaging.
Return procedure for AP7370-18FDC-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AP7370-18FDC-7 Tags
-
MIC5504-1.8YM5-TR
Microchip Technology
-
MIC5504-3.3YM5-TR
Microchip Technology
-
MIC5365-3.0YC5-TR
Microchip Technology
-
MIC5365-1.8YC5-TR
Microchip Technology
-
MIC5365-2.5YC5-TR
Microchip Technology
-
MIC5365-3.3YC5-TR
Microchip Technology
-
MIC5365-3.3YD5-TR
Microchip Technology
-
MIC5317-3.3YM5-TR
Microchip Technology
-
TLV1117LV33DCYR
Texas Instruments
-
MIC5317-3.3YMT-TZ
Microchip Technology
-
MIC5528-3.3YMT-TR
Microchip Technology
-
TLV75801PDRVR
Texas Instruments
Tech Hub
Comparator circuit design covering voltage thresholds, input limits, open-collector outputs, LM393 wiring, op-amp differences, hysteresis, timing, window detection and practical fault diagnosis.
Schmitt triggers use separate rising and falling thresholds to stabilize slow or noisy signals. This guide covers hysteresis, 74HC14 and 74HCT14 selection, comparator calculations, RC oscillators and p…
Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
