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Home > Products > Integrated Circuits (ICs) > Power Management (PMIC) > Voltage Regulators - Linear, Low Drop Out (LDO) Regulators

Diodes Incorporated AP7370-36FDC-7

Name: AP7370-36FDC-7
Brand: Diodes Incorporated
SKU: AP7370-36FDC-7
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: AP7370-36FDC-7

Manufacturer:: Diodes Incorporated

Category:: Voltage Regulators - Linear, Low Drop Out (LDO) Regulators

Package:: 6-UDFN Exposed Pad

Datasheet:: AP7370-36FDC-7.pdf

Description:: IC REG LINEAR 3.6V 300MA 6DFN

Quantity:: RFQ Add To RFQ list

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Product details

Overview

AP7370-36FDC-7 from Diodes Incorporated is a fixed-output 3.6V, 300mA ultra-low dropout (ULDO) linear regulator in U-DFN2020-6 (Type C) package. It features 18V max input voltage, 500mV dropout at 100mA, ±1% output accuracy, reverse current protection, and 1.5µA quiescent current - enabling reliable power delivery in space-constrained portable instrumentation and battery-powered systems.

For engineers reviewing the AP7370-36FDC-7 datasheet, AP7370-36FDC-7 pinout, AP7370-36FDC-7 application, or AP7370-36FDC-7 equivalent, key selection criteria include dropout performance at 300mA load, thermal resistance (θ_JA = 54°C/W), compatibility with low-ESR ceramic capacitors, and NC pin handling in fixed-voltage configuration.

Technical Context

The AP7370-36FDC-7 integrates a precision voltage reference, error amplifier, and current-limit circuit to maintain stable 3.6V output across 3.2–18V input range. Its internal architecture enables operation down to 3.2V input while sustaining regulation under full 300mA load, supported by thermal shutdown (160°C) and hysteresis (20°C).

Reverse current protection prevents backflow when V_OUT > V_IN, critical for multi-rail systems. The U-DFN2020-6 (Type C) package provides low thermal resistance (θ_JC = 9.5°C/W) and requires no external compensation due to inherent stability with 1µF ceramic input/output capacitors.

Key Specifications

Parameter	Value and Actual Design Meaning
Output Voltage	Fixed 3.6V ±1% (ensures stable MCU core or sensor bias without external feedback)
Max Input Voltage	18V (supports wide-input industrial or automotive-supplied rails)
Dropout Voltage	500mV @ 100mA (enables regulation from 4.1V input, e.g., single-cell Li-ion with aging)
Quiescent Current	1.5µA @ zero load (extends battery life in always-on metering applications)
Thermal Resistance	θ_JA = 54°C/W (U-DFN2020-6 allows 300mA continuous operation with minimal PCB copper)
Current Limit	350mA min (protects against short-circuit while supporting peak loads in portable devices)
Line Regulation	0.05%/V (maintains <±0.18mV output shift per volt input change)
ESD Rating	HBM 6000V (robust handling during assembly and field operation)

Pinout & Package

U-DFN2020-6 (Type C) package: 2.0mm × 2.0mm × 0.6mm body, exposed thermal pad (EP), RoHS-compliant, halogen-free.

Pin/Terminal	Circuit Role	Design Meaning
1	VIN	Main input supply connection; accepts 3.2–18V; decoupled with 1µF ceramic capacitor
2	NC	No-connect terminal; must be left floating or tied to GND per layout guidelines
3	GND	Analog/digital ground reference; connects to EP for optimal thermal performance
4	NC	No-connect terminal; electrically isolated; no routing required
5	NC	No-connect terminal; not bonded internally; avoid solder bridging
6	VOUT	Regulated 3.6V output; requires 1µF ceramic capacitor within 3mm of pin
EP	GND	Exposed thermal pad; must be soldered to PCB ground plane for θ_JA = 54°C/W

Key Features

Feature	Design Value
Wide Input Range	3.2V to 18V supports unregulated wall adapters, USB PD, and industrial 12V rails
Ultra-Low IQ	1.5µA quiescent current enables >10-year battery life in low-duty-cycle weighing scales
Reverse Current Protection	Blocks backfeed from VOUT to VIN during power sequencing or fault conditions
Ceramic Cap Compatible	Stable with 1µF input/output ceramics - eliminates need for costly tantalum or electrolytic caps
Thermal Shutdown	160°C trip with 20°C hysteresis prevents latch-up during sustained overload or poor heatsinking

Applications

Portable Weighing Scales

Metering Data Loggers

Use Scenario: Battery-powered digital scales requiring stable 3.6V for ADC reference and microcontroller core.

IC Role / Device Role / Timing Role: Primary LDO supplying precision analog front-end and low-power MCU.

Use Value: ±1% output accuracy and 0.05%/V line regulation ensure consistent weight measurement across battery discharge (3.2–4.2V).

Use Scenario: Energy meter data loggers operating on coin-cell or Li-SOCl₂ batteries for 10+ year deployment.

IC Role / Device Role / Timing Role: Standby power regulator maintaining RTC and memory retention during deep sleep.

Use Value: 1.5µA quiescent current extends battery life beyond 12 years at 10µA average system current.

Laptop Subsystem Power

USB-Powered Instrumentation

Use Scenario: Always-on subsystems (e.g., keyboard controller, touchpad) in notebooks with variable adapter input (5–20V).

IC Role / Device Role / Timing Role: Secondary LDO deriving 3.6V from main 5V/12V rail for low-noise peripheral logic.

Use Value: 500mV dropout ensures regulation even when input sags to 4.1V during transient load events.

Use Scenario: Handheld test equipment powered directly from USB 5V, requiring clean 3.6V for RF front-end bias.

IC Role / Device Role / Timing Role: Noise-sensitive analog supply rail isolating RF section from noisy USB switching noise.

Use Value: Excellent load regulation (±0.5%) maintains signal integrity during rapid current transients from RF bursts.

Equivalent & Alternatives

The following parts are listed as comparable options for similar ULDO regulator applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
AP7375-36FDC-7	Successor device with same pinout; improved PSRR (65dB @ 1kHz vs 55dB) and lower dropout (400mV @ 100mA)	Recommended for new designs requiring higher noise immunity in RF or precision analog circuits	Select AP7375-36FDC-7 if upgrading from AP7370; identical footprint enables drop-in replacement with enhanced specs
MCP1703T-3602E/MB	300mA, 3.6V LDO in SOT-23; higher IQ (2.5µA), no reverse current protection, θ_JA = 205°C/W	Suitable for cost-sensitive, low-density PCBs where thermal margin is sufficient and backfeed risk is absent	Choose only if board space permits larger thermal solution and reverse current blocking is unnecessary

Compared with AP7370-36FDC-7, AP7375-36FDC-7 delivers measurable PSRR and dropout improvements without layout changes, while MCP1703T-3602E/MB trades thermal efficiency and protection for lower unit cost in thermally relaxed environments.

Availability

AP7370-36FDC-7 is available at Aetrix Electronics and suitable for portable instrumentation, battery-powered weighing systems, and USB-powered test equipment requiring stable component supply with long-term continuity planning.

Supply support for AP7370-36FDC-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 semiconductor company specializing in discrete, analog, and mixed-signal solutions for power management, signal integrity, and connectivity applications.

The AP7370 series belongs to Diodes' high-performance LDO portfolio, designed specifically for space-constrained, battery-sensitive applications demanding ultra-low IQ, wide VIN, and robust protection features.

FAQ

Is AP7370-36FDC-7 recommended for new designs?

No - Diodes Incorporated explicitly marks AP7370-36FDC-7 as "NOT RECOMMENDED FOR NEW DESIGN" in its datasheet. The AP7375-36FDC-7 is the designated successor with improved PSRR, lower dropout, and identical U-DFN2020-6 (Type C) packaging. For new projects, engineers should migrate to AP7375-36FDC-7 to ensure long-term supply and performance gains.

What is the function of NC pins on AP7370-36FDC-7?

Pins 2, 4, and 5 on AP7370-36FDC-7 are No-Connect (NC) terminals - they are not bonded to the die and serve no electrical function. Per Diodes' layout guidance, these pins may be left floating or connected to GND for mechanical stability, but must never be tied to VIN or VOUT. Solder mask should fully cover NC pads to prevent accidental shorts.

Can AP7370-36FDC-7 operate with only 1µF ceramic capacitors?

Yes - the AP7370-36FDC-7 is internally compensated and stable with 1.0µF ceramic capacitors on both input and output, as confirmed in the datasheet's Recommended Operating Conditions and Typical Applications Circuit. This eliminates need for external compensation networks or higher-ESR capacitors, simplifying BOM and reducing board area.

How does reverse current protection work in AP7370-36FDC-7?

AP7370-36FDC-7 incorporates an integrated reverse-current-blocking MOSFET that disables conduction when V_OUT exceeds V_IN by >100mV. This prevents backfeeding into upstream supplies during hot-swap events, power sequencing faults, or battery backup scenarios - verified by the "Output Reverse Current vs Output Voltage" curves in the datasheet (page 6).

AP7370-36FDC-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):: 3.6V

Voltage - Output (Max):: -

Voltage Dropout (Max):: 0.6V @ 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)

AP7370-36FDC-7 FAQ

1.How can I place an order for AP7370-36FDC-7 through Aetrix?

Please submit a Request for Quotation (RFQ) for AP7370-36FDC-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 AP7370-36FDC-7 reliable?

The price and inventory of AP7370-36FDC-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP7370-36FDC-7 is usually 5 days.

3.What payment methods are accepted for AP7370-36FDC-7?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP7370-36FDC-7 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for AP7370-36FDC-7?

AP7370-36FDC-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your AP7370-36FDC-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 AP7370-36FDC-7?

For technical support, including AP7370-36FDC-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP7370-36FDC-7 requirements.

6.How does Aetrix verify that AP7370-36FDC-7 is sourced from the original manufacturer or authorized distributors?

All AP7370-36FDC-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 AP7370-36FDC-7 meets industry standards.

7.What is the process for return or replacement of AP7370-36FDC-7?

All AP7370-36FDC-7 units undergo pre-shipment inspection (PSI). If there is an issue with AP7370-36FDC-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 AP7370-36FDC-7 part is unused and in its original packaging.

Return procedure for AP7370-36FDC-7:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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