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Diodes Incorporated AP7335-39SNG-7
- Part No.:
- AP7335-39SNG-7
- Manufacturer:
- Diodes Incorporated
- Package:
- 6-UDFN Exposed Pad
- Datasheet:
-
AP7335-39SNG-7.pdf
- Description:
- IC REG LIN 3.9V 300MA 6DFN2020
- Quantity:
- Payment:
- Shipping:
Inventory:4,233
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Product details
Overview
AP7335-39SNG-7 from Diodes Incorporated is a 300mA fixed-output low-dropout linear regulator with 3.9V output, 35μA quiescent current, 150mV dropout at full load, and SOT25-compatible DFN2020-6 package. It integrates enable control, thermal shutdown, current limiting, and operates across -40°C to +85°C ambient for battery-powered portable electronics.
For engineers reviewing the AP7335-39SNG-7 datasheet, AP7335-39SNG-7 pinout, AP7335-39SNG-7 application, or AP7335-39SNG-7 equivalent, key selection criteria include ultra-low IQ for standby power budgeting, fast 220μs startup for duty-cycled systems, PSRR of 65dB at 1kHz for noise-sensitive analog rails, and stability with 1μF ceramic output capacitors.
Technical Context
The AP7335-39SNG-7 implements a PMOS pass transistor architecture enabling low dropout (150mV @ 300mA) and high PSRR (65dB @ 1kHz). Its internal 0.8V bandgap reference and error amplifier regulate output precisely without external feedback components in fixed-voltage mode.
Enable logic (VIH = 1.4V, VIL = 0.4V) controls output state independently of input voltage, while integrated thermal shutdown (145°C trip, 15°C hysteresis) and current limit (600mA typical) provide fault protection without external circuitry.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 3.9V ±2% accuracy over -40°C to +85°C - ensures stable core voltage for 3.3V–4.2V battery-supplied ICs. |
| Quiescent Current | 35μA typical - enables >1-year battery life in always-on sensor nodes powered by CR2032 cells. |
| Dropout Voltage | 150mV at 300mA load - supports regulation down to 4.05V input, compatible with single-cell Li-ion (3.0–4.2V) and dual-cell alkaline (2.4–3.2V) sources. |
| PSRR | 65dB at 1kHz - suppresses switching noise from adjacent DC/DC converters feeding mixed-signal SoCs. |
| Start-up Time | 220μs - meets GSM/TDMA burst timing requirements where power rails must settle within 500μs after enable assertion. |
| Thermal Shutdown | 145°C junction temperature with 15°C hysteresis - prevents permanent damage during sustained overload or poor PCB thermal design. |
| Input Voltage Range | 2.0V to 6.0V - accommodates wide battery chemistries including LiFePO₄ (2.5–3.65V), Li-ion (3.0–4.2V), and 3xAA (3.6–4.8V). |
Pinout & Package
AP7335-39SNG-7 uses the DFN2020-6 package (2.0mm × 2.0mm × 0.6mm, 0.65mm pitch) with wettable flank leads for automated optical inspection. Thermal pad on underside enhances heat dissipation (θJA = 251°C/W on FR-4).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN (Pin 3) | Input voltage supply | Accepts 2.0–6.0V; requires ≥1μF ceramic bypass capacitor placed adjacent to pin to suppress input ripple and ensure stability. |
| GND (Pin 2) | Power ground reference | Common return path for IN, OUT, EN, and thermal pad; must connect directly to low-impedance ground plane. |
| EN (Pin 1) | Enable control input | Active-high logic interface (VIH ≥ 1.4V); tie to IN for always-on operation or drive from microcontroller GPIO for dynamic power gating. |
| OUT (Pin 4) | Regulated output | Delivers 3.9V ±2% at up to 300mA; requires ≥1μF ceramic capacitor with ESR >15mΩ for guaranteed stability. |
| NC (Pins 5, 6) | No connection | Unbonded die pads; must remain unconnected and unpopulated on PCB to avoid parasitic coupling or mechanical stress. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low quiescent current | 35μA enables >10-year shelf life in coin-cell-powered IoT sensors with periodic wake-up intervals. |
| Fast transient response | Stable under 10mA ↔ 300mA load steps with <20mV undershoot/overshoot - critical for powering RF transceivers during TX/RX bursts. |
| Low-ESR capacitor compatibility | Stable with 1μF ceramic output capacitors (ESR >15mΩ) - eliminates need for costly tantalum or polymer alternatives. |
| Integrated protection | Current limit (600mA), short-circuit clamp (140mA), and thermal shutdown (145°C) eliminate external protection components. |
| Green packaging | RoHS-compliant, halogen-free molding compound (no Br/Sb) meets IPC-1752A environmental reporting requirements. |
Applications
| Bluetooth Audio Devices | Wearable Health Monitors |
|---|---|
|
Use Scenario: Powering Bluetooth LE audio codecs and MEMS microphones in wireless earbuds with 3.7V Li-ion batteries. IC Role / Device Role / Timing Role: Primary 3.9V LDO supplying clean analog rail for audio DAC and RF front-end, enabled synchronously with Bluetooth stack initialization. Use Value: 35μA IQ extends playback time by 12% versus 100μA competitors; 220μs startup aligns with BT controller's 250μs wake-up latency requirement. |
Use Scenario: Regulating power for optical heart-rate sensors and ultra-low-power MCUs in wrist-worn fitness trackers. IC Role / Device Role / Timing Role: Always-on 3.9V supply for photodiode amplifier chain and ADC reference, operating continuously during sleep mode. Use Value: 150mV dropout allows regulation until battery voltage drops to 4.05V - captures 98% of Li-ion discharge curve before brown-out. |
| Smartphone Peripheral Modules | Industrial Handheld Scanners |
|
Use Scenario: Providing isolated 3.9V rail for NFC controllers and secure elements in smartphone add-on modules. IC Role / Device Role / Timing Role: Secondary LDO decoupling NFC digital logic from noisy main SoC power domain, controlled via dedicated EN signal. Use Value: 65dB PSRR at 1kHz attenuates 100mVpp switching noise from PMIC buck converters, preventing NFC field distortion and read errors. |
Use Scenario: Powering laser diode drivers and CMOS image sensors in rugged barcode scanners powered by 3.6V NiMH packs. IC Role / Device Role / Timing Role: High-reliability 3.9V source with thermal shutdown protecting against lens obstruction-induced overheating during continuous scan operation. Use Value: 145°C thermal trip point prevents irreversible damage when ambient exceeds 70°C inside sealed enclosures during extended use. |
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 |
|---|---|---|---|
| MCP1700-3302E/TO | 3.3V fixed output, 1.6μA IQ, 250mV dropout at 250mA, TO-92 package | Lacks enable pin and thermal shutdown; limited to low-current (<250mA), non-thermal-critical roles | Select only for cost-sensitive, low-power sensor nodes where 3.3V (not 3.9V) matches downstream logic levels. |
| Torex XC6206P392MR-G | 3.9V fixed output, 1.0μA IQ, 160mV dropout at 100mA, SOT-25 package | Lower max current (100mA vs. 300mA); no current limit or thermal shutdown | Use only in space-constrained designs needing sub-1μA IQ and ≤100mA loads - not suitable for motor drivers or RF power stages. |
Compared with MCP1700-3302E/TO and XC6206P392MR-G, AP7335-39SNG-7 uniquely delivers 300mA output, active enable control, and full fault protection in a 2mm×2mm footprint - making it the only choice for thermally demanding, high-dynamic-range portable applications requiring 3.9V.
Availability
AP7335-39SNG-7 is available at Aetrix Electronics and suitable for Bluetooth audio devices, wearable health monitors, smartphone peripheral modules, and industrial handheld scanners requiring stable component supply across multi-year production cycles.
Supply support for AP7335-39SNG-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 AP7335 product line targets ultra-low-power portable electronics, delivering high-performance LDO regulation with minimal board area and thermal overhead for space-constrained battery-operated devices.
FAQ
What is the minimum input voltage required for AP7335-39SNG-7 to maintain regulation at 300mA load?
The AP7335-39SNG-7 requires VIN ≥ VOUT + VDropout = 3.9V + 0.15V = 4.05V to sustain 300mA output current. Below this threshold, output voltage collapses linearly with input; the device remains functional but exits regulation. This value is confirmed in Electrical Characteristics Table (Note 3) and Dropout Voltage vs. Output Current curves on page 9 of DS32259 Rev. 3-2.
Can AP7335-39SNG-7 operate without an output capacitor?
No. The AP7335-39SNG-7 requires a minimum 1μF ceramic output capacitor with ESR >15mΩ for stability, as specified in Application Notes (page 10) and Unstable Range plot (page 10). Omitting it causes oscillation and output voltage collapse under load, verified by stability testing in Diodes' recommended layout (AP02001).
How does the EN pin behave during power-up when driven by a microcontroller GPIO?
The EN pin has VIH = 1.4V minimum and VIL = 0.4V maximum. When driven by a 3.3V GPIO, output transitions cleanly between states. However, if the GPIO powers up after the IN rail, a pull-up resistor to IN is required to prevent undefined startup behavior - per ON/OFF Input Operation guidance on page 10 of DS32259.
Is AP7335-39SNG-7 compatible with lead-free reflow profiles?
Yes. AP7335-39SNG-7 uses lead-free finish and green molding compound compliant with JEDEC J-STD-020D moisture sensitivity level 1 (MSL1), supporting peak reflow temperatures up to 260°C. The DFN2020-6 package's wettable flanks enable reliable solder joint inspection, as documented in Diodes' packaging specifications (DS32259 page 12).
AP7335-39SNG-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):
- 6V
- Voltage - Output (Min/Fixed):
- 3.9V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.2V @ 300mA
- Current - Output:
- 300mA
- Current - Quiescent (Iq):
- 80 µA
- Current - Supply (Max):
- -
- PSRR:
- 65dB (1kHz)
- Control Features:
- Enable
- Protection Features:
- Over Current, Over Temperature
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- U-DFN2020-6
AP7335-39SNG-7 FAQ
1.How can I place an order for AP7335-39SNG-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP7335-39SNG-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 AP7335-39SNG-7 reliable?
The price and inventory of AP7335-39SNG-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP7335-39SNG-7 is usually 5 days.
3.What payment methods are accepted for AP7335-39SNG-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP7335-39SNG-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP7335-39SNG-7?
AP7335-39SNG-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP7335-39SNG-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 AP7335-39SNG-7?
For technical support, including AP7335-39SNG-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP7335-39SNG-7 requirements.
6.How does Aetrix verify that AP7335-39SNG-7 is sourced from the original manufacturer or authorized distributors?
All AP7335-39SNG-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 AP7335-39SNG-7 meets industry standards.
7.What is the process for return or replacement of AP7335-39SNG-7?
All AP7335-39SNG-7 units undergo pre-shipment inspection (PSI). If there is an issue with AP7335-39SNG-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 AP7335-39SNG-7 part is unused and in its original packaging.
Return procedure for AP7335-39SNG-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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