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Diodes Incorporated AP7335-18SNG-7
- Part No.:
- AP7335-18SNG-7
- Manufacturer:
- Diodes Incorporated
- Package:
- 6-UDFN Exposed Pad
- Datasheet:
-
AP7335-18SNG-7.pdf
- Description:
- IC REG LIN 1.8V 300MA 6DFN2020
- Quantity:
- Payment:
- Shipping:
Inventory:2,327
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Product details
Overview
AP7335-18SNG-7 from Diodes Incorporated is a fixed-output 1.8V, 300mA low-dropout linear regulator in DFN2020-6 package, featuring 35μA quiescent current, 150mV dropout at full load, 65dB PSRR at 1kHz, and fast 220μs startup - designed for power-sensitive portable applications including Bluetooth headsets and MP3 players.
For engineers reviewing the AP7335-18SNG-7 datasheet, AP7335-18SNG-7 pinout, AP7335-18SNG-7 application, or AP7335-18SNG-7 equivalent, this page delivers verified electrical specs, thermal behavior, EN-controlled enable logic, stability conditions with 1μF ceramic output capacitor, and real-world transient response data for battery-powered system design.
Technical Context
The AP7335-18SNG-7 integrates a PMOS pass element, precision 0.8V bandgap reference, error amplifier, and protection circuitry (current limit, thermal shutdown) in a single-chip LDO architecture. Its fixed 1.8V output eliminates external feedback resistors while maintaining ±2% output accuracy across –40°C to +85°C ambient.
It operates from 2V to 6V input, delivers stable regulation down to zero load, and sustains fast load transient response (10mA ↔ 300mA in <100μs) due to optimized internal compensation - critical for GSM/TDMA baseband power rails where duty-cycled DSP loads demand sub-200mV output deviation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.8V ±2% over –40°C to +85°C; enables direct powering of 1.8V I/O domains without resistor network. |
| Max Output Current | 300mA continuous; supports moderate-power RF modules and audio codecs in compact wearables. |
| Quiescent Current | 35μA typical; extends battery life in always-on sensor nodes and standby-mode peripherals. |
| Dropout Voltage | 150mV at 300mA (VOUT ≥ 2.5V), 170mV at 300mA (VOUT < 2.5V); allows operation from single-cell Li-ion (3.0V min) down to 2.0V input. |
| PSRR | 65dB at 1kHz; suppresses switching noise from adjacent DC/DC converters feeding shared input rail. |
| Startup Time | 220μs from EN high to regulated VOUT; meets real-time wake-up timing for Bluetooth LE controllers. |
| Thermal Shutdown | Triggers at 145°C junction temperature with 15°C hysteresis; prevents permanent damage during sustained overload or poor PCB heatsinking. |
Pinout & Package
DFN2020-6 package: 2.0mm × 2.0mm × 0.6mm body, exposed thermal pad, RoHS-compliant lead-free finish, green molding compound.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN (Pin 3) | Input voltage supply | Accepts 2V–6V; requires ≥1μF MLCC bypass close 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 to solid ground plane for thermal performance. |
| EN (Pin 1) | Enable control input | Active-high logic interface (VIH = 1.4V min); ties to VIN for always-on operation or microcontroller GPIO for dynamic power gating. |
| OUT (Pin 4) | Regulated output | Delivers 1.8V ±2%; requires ≥1μF ceramic capacitor with ESR >15mΩ directly at pin for transient stability. |
| NC (Pins 5, 6) | No connection | Unbonded terminals; must remain floating - no routing or soldering permitted. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low IQ | 35μA quiescent current enables >1-year battery life in coin-cell–powered IoT sensors. |
| Fast transient response | Stable under 10mA ↔ 300mA load steps with <20mV undershoot/overshoot - validated for GSM baseband ICs. |
| Low-ESR capacitor compatibility | Stable with 1μF ceramic output capacitor (ESR >15mΩ), reducing BOM count and board area vs. legacy LDOs. |
| Integrated protection | Current limit (~600mA), short-circuit clamp (~140mA), and thermal shutdown prevent field failures in unattended devices. |
| Wide input range | 2V–6V operation supports single Li-ion, dual alkaline, or USB-powered systems without pre-regulation. |
Applications
| Bluetooth Headset Power Rail | MP3 Player Core Logic Supply |
|---|---|
|
Use Scenario: Powers Bluetooth radio IC and audio DAC in compact wireless earbuds with 3.7V Li-ion battery. IC Role / Device Role / Timing Role: Primary 1.8V LDO supplying RF transceiver I/O and digital audio interface. Use Value: 35μA IQ minimizes standby drain; 220μs startup enables instant audio playback on connection; 150mV dropout preserves runtime down to 2.0V battery voltage. |
Use Scenario: Supplies 1.8V core voltage to ARM-based audio processor and SD card interface in portable media player. IC Role / Device Role / Timing Role: Fixed-output LDO delivering clean, low-noise power to processor I/O banks and memory controller. Use Value: 65dB PSRR at 1kHz rejects noise from switching DC/DC converter; fast load transient response prevents audio glitches during file decode bursts. |
| Smartphone Camera Module | Wearable Sensor Hub |
|
Use Scenario: Provides 1.8V bias to CMOS image sensor and ISP in ultra-thin smartphone camera subsystem. IC Role / Device Role / Timing Role: Compact-area LDO mounted adjacent to image sensor die for minimal trace inductance. Use Value: DFN2020-6 footprint (4mm²) fits tight space constraints; thermal shutdown protects against lens actuator motor-induced self-heating. |
Use Scenario: Powers 1.8V accelerometer, gyroscope, and BLE SoC in wrist-worn health monitor with CR2032 coin cell. IC Role / Device Role / Timing Role: Always-on LDO enabling motion-triggered wake-up while minimizing average current draw. Use Value: 35μA IQ extends CR2032 lifetime beyond 12 months; zero-load stability eliminates need for dummy load resistors. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar fixed-output LDO applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MCP1700-1802E/TO | 250mA max output, 1.8V fixed, 1.6μA IQ (lower), SOT23-5 package | Limited to ultra-low-power sensors; insufficient for 300mA peak loads like audio codecs | Select when IQ <2μA is mandatory and load never exceeds 250mA. |
| Torex XC6219B182MR-G | 300mA, 1.8V fixed, 1.0μA IQ, SOT25 package, 220mV dropout at 300mA | Higher dropout reduces usable input range; larger SOT25 footprint vs. DFN2020-6 | Choose if board layout permits SOT25 and lowest possible IQ outweighs thermal density requirements. |
Compared with MCP1700-1802E/TO and XC6219B182MR-G, the AP7335-18SNG-7 uniquely balances 300mA capability, 35μA IQ, 150mV dropout, and 2.0×2.0mm DFN packaging - making it optimal for space-constrained, battery-powered systems requiring both moderate current and long runtime.
Availability
AP7335-18SNG-7 is available at Aetrix Electronics and suitable for Bluetooth headset power management, MP3 player core logic supply, and wearable sensor hub applications requiring stable component supply, consistent parametric performance, and long-term lifecycle support.
Supply support for AP7335-18SNG-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 consumer, industrial, and automotive markets.
The AP7335 belongs to Diodes' low-quiescent-current LDO product line, engineered specifically for battery-powered portable electronics where extended runtime, small form factor, and fast transient response are critical design requirements.
FAQ
What is the minimum input voltage required for stable 1.8V output at 300mA?
The AP7335-18SNG-7 requires VIN ≥ VOUT + VDropout = 1.8V + 0.15V = 1.95V minimum. However, per datasheet absolute minimum VIN is 2.0V, and recommended operating range starts at 2.0V. At 300mA load and 25°C, dropout is 150mV, so 1.95V is theoretically sufficient - but 2.0V ensures margin across temperature and process variation.
Can the EN pin be left unconnected, or must it be tied high?
The EN pin must not be left floating. It is an active-high digital input with VIH ≥ 1.4V and VIL ≤ 0.4V. For always-on operation, tie EN directly to VIN. For controlled enable/disable, drive it with a GPIO capable of meeting those logic thresholds. Leaving it open risks undefined state and intermittent regulation failure.
Is a minimum load required for output stability?
No minimum load is required. The AP7335-18SNG-7 remains stable and fully regulated from zero load up to 300mA, as confirmed in the datasheet's "No Load Stability" section. This eliminates need for bleed resistors in battery-critical applications.
What is the maximum allowable PCB copper area for the thermal pad in DFN2020-6?
The thermal pad must be soldered to a solid copper plane with ≥4 thermal vias (0.3mm diameter) connecting to inner/ground layers. While no maximum area is specified, Diodes recommends following AP02001 land pattern: 1.45mm × 1.65mm pad with 0.37mm solder mask opening. Excessive copper may impede reflow, but adequate thermal relief improves θJA from 251°C/W toward 120°C/W in production layouts.
AP7335-18SNG-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):
- 1.8V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.3V @ 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
AP7335-18SNG-7 FAQ
1.How can I place an order for AP7335-18SNG-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP7335-18SNG-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 AP7335-18SNG-7 reliable?
The price and inventory of AP7335-18SNG-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP7335-18SNG-7 is usually 5 days.
3.What payment methods are accepted for AP7335-18SNG-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP7335-18SNG-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP7335-18SNG-7?
AP7335-18SNG-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP7335-18SNG-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 AP7335-18SNG-7?
For technical support, including AP7335-18SNG-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP7335-18SNG-7 requirements.
6.How does Aetrix verify that AP7335-18SNG-7 is sourced from the original manufacturer or authorized distributors?
All AP7335-18SNG-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 AP7335-18SNG-7 meets industry standards.
7.What is the process for return or replacement of AP7335-18SNG-7?
All AP7335-18SNG-7 units undergo pre-shipment inspection (PSI). If there is an issue with AP7335-18SNG-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 AP7335-18SNG-7 part is unused and in its original packaging.
Return procedure for AP7335-18SNG-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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