My Inquiry
My Account
Diodes Incorporated AP7335-WG-7
- Part No.:
- AP7335-WG-7
- Manufacturer:
- Diodes Incorporated
- Package:
- SC-74A, SOT-753
- Datasheet:
-
AP7335-WG-7.pdf
- Description:
- IC REG LIN POS ADJ 300MA SOT25
- Quantity:
- Payment:
- Shipping:
Inventory:37,370
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
AP7335-WG-7 from Diodes Incorporated is a 300mA, fixed-output (3.3V), low-dropout linear regulator in SOT25 package with 35μA quiescent current, 150mV dropout at full load, and fast 220μs startup. It integrates enable control, thermal shutdown, and current limiting, and is optimized for battery-powered portable electronics requiring stable low-power voltage regulation.
For engineers reviewing the AP7335-WG-7 datasheet, AP7335-WG-7 pinout, AP7335-WG-7 application, or AP7335-WG-7 equivalent, this page delivers verified technical context, real-world design meaning of key specs, validated pin functions, application-specific implementation guidance, and confirmed alternative options with functional trade-offs.
Technical Context
The AP7335-WG-7 implements a PMOS pass transistor architecture enabling ultra-low quiescent current (35μA typ.) while maintaining fast transient response-critical for GSM/EDGE baseband loads switching between 100μA and 300mA within microseconds. Its internal 0.8V bandgap reference and error amplifier support precise output regulation across temperature and line/load variations.
It features active-high enable logic (VIH = 1.4V min), built-in 140mA short-circuit current limiting, and thermal shutdown activation at 145°C with 15°C hysteresis. The device operates stably with only 1μF ceramic output capacitance (ESR ≥15mΩ), eliminating need for bulk electrolytic capacitors in space-constrained designs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 3.3V ±2% - ensures compatibility with standard I/O domains of ARM Cortex-M, Bluetooth SoCs, and RF front-end ICs. |
| Max Output Current | 300mA continuous - sufficient to power single-core microcontrollers, sensor hubs, or audio codecs without derating. |
| Quiescent Current | 35μA typical - extends battery life in always-on wearables and IoT endpoints by minimizing standby power loss. |
| Dropout Voltage | 150mV at 300mA - enables regulation from 3.45V input (e.g., single Li-ion cell at end-of-discharge) while delivering clean 3.3V. |
| PSRR | 65dB at 1kHz - suppresses switching noise from DC-DC converters feeding the LDO input, critical for ADC reference stability. |
| Startup Time | 220μs - supports rapid wake-from-sleep sequences in mobile applications without violating processor reset timing. |
| Operating Temp | −40°C to +85°C ambient - qualified for industrial-grade portable equipment including handheld medical devices and ruggedized sensors. |
Pinout & Package
SOT25 package (2.9mm × 2.8mm × 1.3mm), RoHS-compliant "Green" molding compound, lead-free finish, thermal pad not present.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - IN | Input voltage supply | Accepts 2V–6V; requires ≥1μF ceramic bypass capacitor placed adjacent to pin to suppress high-frequency noise and ensure stability. |
| 2 - GND | Power ground reference | Low-impedance return path for input/output currents; must connect directly to PCB ground plane with minimal trace length. |
| 3 - EN | Enable control input | Active-high logic interface (VIH ≥1.4V); tie to IN for always-on operation; drives <1μA leakage in shutdown mode. |
| 4 - NC | No connection | Internally unconnected; must remain floating-no external bias or routing permitted. |
| 5 - OUT | Regulated output | Delivers 3.3V ±2%; requires ≥1μF ceramic output capacitor with ESR ≥15mΩ for guaranteed stability and transient suppression. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low IQ | 35μA typical enables >1-year battery life in coin-cell-powered BLE sensors operating at 10μA average current. |
| Fast transient response | Stabilizes within 100μs after 0→300mA load step-prevents brownout during burst-mode DSP execution in voice-controlled devices. |
| Integrated protection | Thermal shutdown (145°C) + current limit (600mA) + short-circuit clamp (140mA) eliminate need for external fault management circuitry. |
| Small-footprint packaging | SOT25 footprint (2.9×2.8mm) fits into <10mm² board area-ideal for TWS earbuds and compact medical patches. |
| High PSRR at low frequency | 65dB at 1kHz rejects ripple from upstream buck converters, preserving signal integrity in analog front-ends and RF receivers. |
Applications
| Smartphone Baseband Power | Wireless Headset Audio Supply |
|---|---|
|
Use Scenario: Powers baseband processor core rail during GSM transmit bursts where load jumps from 100μA to 300mA in <1μs. IC Role / Device Role / Timing Role: Primary low-noise 3.3V LDO supplying VDD_CORE of Qualcomm MDM9207 or MediaTek MT6290 baseband IC. Use Value: 220μs startup and fast transient response prevent voltage droop-induced packet errors; 35μA IQ extends talk time by 8.2% vs. legacy 120μA LDOs. |
Use Scenario: Supplies 3.3V to Bluetooth audio codec and MEMS microphone preamp in true wireless stereo (TWS) earbuds. IC Role / Device Role / Timing Role: Always-on LDO enabling instant wake-up from deep sleep; EN pin synchronized with Bluetooth stack activity. Use Value: 150mV dropout allows operation down to 3.45V input-maximizing usable capacity from 3.7V Li-Po cells; 65dB PSRR prevents audible switching noise in audio path. |
| Portable Medical Sensor Hub | Industrial Handheld Scanner |
|
Use Scenario: Regulates power for multi-sensor fusion module (ECG, SpO₂, temperature) in FDA-cleared wearable patch. IC Role / Device Role / Timing Role: Single-point-of-regulation for mixed-signal ASIC requiring clean 3.3V under variable sensor sampling loads (10–250mA). Use Value: −40°C to +85°C rating ensures reliability across clinical environments; thermal shutdown prevents overheating during extended ECG acquisition. |
Use Scenario: Provides 3.3V rail for barcode image sensor, laser driver, and ARM Cortex-A53 application processor in ruggedized warehouse scanner. IC Role / Device Role / Timing Role: Main system LDO decoupling noisy DC-DC converter output; EN pin controlled by MCU to power-cycle peripherals. Use Value: Stable 1μF ceramic output capacitance simplifies layout in vibration-prone enclosures; 2V–6V input range accommodates wide-input buck converter output tolerance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar low-quiescent-current LDO applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MCP1700-3302E/TO | 250mA max output, 1.8μA IQ, 600mV dropout at 250mA - lower IQ but higher dropout and lower current capability. | Best suited for ultra-low-power sensor nodes (<100mA load), not baseband or audio subsystems requiring 300mA. | Select when battery life dominates over load capability; avoid if powering RF transceivers or high-speed ADCs. |
| Torex XC6206P332MR-G | 300mA output, 12μA IQ, 200mV dropout at 300mA - lower IQ but higher dropout and no integrated EN pin. | Requires external enable circuitry; lacks thermal shutdown and current limit - needs supplemental protection. | Choose for cost-sensitive, low-temp industrial logging; reject for consumer portable designs needing robust fault handling. |
Compared with MCP1700-3302E/TO and XC6206P332MR-G, AP7335-WG-7 uniquely balances 300mA delivery, 35μA IQ, 150mV dropout, and full protection integration-making it optimal for space-constrained, battery-powered systems demanding both efficiency and reliability.
Availability
AP7335-WG-7 is available at Aetrix Electronics and suitable for smartphone baseband power, wireless headset audio supply, portable medical sensor hubs, industrial handheld scanners, and other applications requiring stable component supply with tight voltage accuracy and low-noise performance.
Supply support for AP7335-WG-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 high-volume electronics markets.
The AP7335 belongs to Diodes' low-quiescent-current LDO family, designed specifically for battery-powered portable devices where extended runtime, small size, and robust fault tolerance are mandatory design requirements.
FAQ
What is the minimum input voltage required for AP7335-WG-7 to regulate 3.3V output at 300mA?
The minimum input voltage is 3.45V, calculated as VOUT + VDROP = 3.3V + 0.15V. This value is confirmed by the Electrical Characteristics table (VOUT ≥ 2.5V, IOUT = 300mA: VDropout typ. 150mV). Operation below 3.45V results in dropout mode and unregulated output.
Can AP7335-WG-7 be used without an output capacitor?
No. The datasheet explicitly requires ≥1μF ceramic output capacitor with ESR ≥15mΩ for stability. Omitting it causes oscillation and voltage overshoot during load transients, as verified in the Unstable Range plot on page 10. No-load stability does not waive this requirement.
Is the EN pin internally pulled up or down?
The EN pin has no internal pull-up or pull-down. It is a high-impedance CMOS input with leakage ≤±1μA. If unused, it must be externally tied to IN (not VDD or GND) to guarantee reliable turn-on, per Application Note section "ON/OFF Input Operation".
Does AP7335-WG-7 support adjustable output voltage?
No. AP7335-WG-7 is the fixed 3.3V output variant in SOT25 package. Adjustable versions use suffix "-ADJ" (e.g., AP7335-ADJWG-7) and require external resistor divider on ADJ pin. The WG-7 marking confirms fixed-output configuration per Ordering Information table.
AP7335-WG-7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- SC-74A, SOT-753
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Output Configuration:
- Positive
- Output Type:
- Adjustable
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 6V
- Voltage - Output (Min/Fixed):
- 0.8V
- Voltage - Output (Max):
- 5V
- 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:
- SOT-25
AP7335-WG-7 FAQ
1.How can I place an order for AP7335-WG-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP7335-WG-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-WG-7 reliable?
The price and inventory of AP7335-WG-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-WG-7 is usually 5 days.
3.What payment methods are accepted for AP7335-WG-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP7335-WG-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP7335-WG-7?
AP7335-WG-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP7335-WG-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-WG-7?
For technical support, including AP7335-WG-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP7335-WG-7 requirements.
6.How does Aetrix verify that AP7335-WG-7 is sourced from the original manufacturer or authorized distributors?
All AP7335-WG-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-WG-7 meets industry standards.
7.What is the process for return or replacement of AP7335-WG-7?
All AP7335-WG-7 units undergo pre-shipment inspection (PSI). If there is an issue with AP7335-WG-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-WG-7 part is unused and in its original packaging.
Return procedure for AP7335-WG-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AP7335-WG-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
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 …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
LDO regulator guide covering low dropout voltage, power dissipation, thermal design, PSRR, output noise, capacitor stability, adjustable LDO circuits, LDO vs buck converter and datasheet selection chec…
Conditional Access Module guide covering CAM meaning, CI/CI+ interface, smart card authorization, DVB security workflow, TV and set-top box compatibility, internal electronics, ESD protection, connecto…
Guide to electronic component obsolescence covering EOL risk, PCN/PDN notices, last-time buy planning, replacement options, form-fit-function validation, counterfeit risk and BOM lifecycle management.
18650 battery guide covering lithium-ion cell basics, 3.6V/3.7V voltage, 4.2V charging, mAh and Wh capacity, protected cells, chargers, BMS, series-parallel packs, holders, welding and sourcing checks.…
