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Diodes Incorporated AP7311-28WG-7
- Part No.:
- AP7311-28WG-7
- Manufacturer:
- Diodes Incorporated
- Package:
- SC-74A, SOT-753
- Datasheet:
-
AP7311-28WG-7.pdf
- Description:
- IC REG LINEAR 2.8V 150MA SOT25
- Quantity:
- Payment:
- Shipping:
Inventory:4,089
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Product details
Overview
AP7311-28WG-7 from Diodes Incorporated is a fixed-output 2.8V, 150mA low-dropout linear regulator in SOT25 package, featuring 65µA quiescent current, 150mV dropout at full load, and 65dB PSRR at 100Hz. It integrates enable control, thermal shutdown, current limiting, and short-circuit protection - designed for battery-powered portable devices requiring stable, low-noise, fast-transient power delivery.
For engineers reviewing the AP7311-28WG-7 datasheet, AP7311-28WG-7 pinout, AP7311-28WG-7 application, or AP7311-28WG-7 equivalent, key selection criteria include fixed 2.8V output accuracy (±2%), ultra-fast 80µs startup, stability with 1µF ceramic output capacitor, and operation across –40°C to +85°C ambient range.
Technical Context
The AP7311-28WG-7 implements a PMOS pass transistor architecture with internal 0.4V bandgap reference and error amplifier, enabling low dropout and minimal IQ across 2V–6V input range. Its EN pin provides logic-compatible (VIH = 1.4V, VIL = 0.4V) on/off control without external pull-ups.
Protection circuitry includes foldback current limiting (200–300mA), short-circuit clamping (~50mA), and thermal shutdown at 140°C with 15°C hysteresis. Transient response is optimized via internal compensation, delivering <100mV undershoot/overshoot during 0→150mA load steps.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 2.8V ±2% over –40°C to +85°C; enables direct replacement of 2.8V rails in portable SoC I/O or RF bias supplies. |
| Max Output Current | 150mA continuous; sufficient for powering single-core microcontrollers, sensors, or low-power RF ICs. |
| Dropout Voltage | 150mV typical at 150mA; allows regulation from 2.95V input - critical for Li-ion (3.0–4.2V) or dual-cell alkaline (2.4–3.2V) systems. |
| Quiescent Current | 65µA typical at full load; reduces standby power loss by >5× vs legacy LDOs, extending battery life in always-on sensor nodes. |
| PSRR | 65dB at 100Hz; suppresses low-frequency switching noise from DC-DC converters feeding the LDO input. |
| Start-up Time | 80µs from EN assertion to regulated 2.8V; supports rapid wake-from-sleep sequences in GSM/TDMA baseband timing. |
| Stability | Guaranteed with 1µF X5R/X7R ceramic output capacitor; eliminates need for bulky tantalum or high-ESR capacitors. |
Pinout & Package
SOT25 (5-pin, 2.9mm × 1.6mm × 1.1mm) surface-mount package with RoHS-compliant lead-free finish and "Green" molding compound (no Br/Sb). Thermal resistance θJA = 190°C/W on standard FR-4 PCB with minimum pad layout.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - IN | Input voltage supply | Accepts 2V–6V; requires ≥1µF ceramic bypass to GND close to pin for noise immunity and stability. |
| 2 - GND | Power ground reference | Common return path for IN, OUT, and EN; must connect to low-impedance ground plane to minimize noise coupling. |
| 3 - EN | Enable control input | Active-high logic interface (VIH ≥1.4V); tie to IN for always-on operation; drives <1µA leakage current when disabled. |
| 4 - NC | No connection | Internally unconnected; must remain floating - no external connection or PCB trace allowed. |
| 5 - OUT | Regulated output | Delivers stable 2.8V; requires ≥1µF ceramic capacitor to GND placed adjacent to pin for transient response and EMI control. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low quiescent current | 65µA at 150mA load ensures <1.8mW total quiescent power dissipation at 2.8V - ideal for coin-cell or energy-harvesting systems. |
| Fast transient response | Sub-100µs recovery from 0→150mA load step with <50mV deviation; maintains clean supply for real-time DSP and RF transceivers. |
| Integrated protection | Thermal shutdown (140°C), current limit (300mA), and short-circuit clamp (50mA) eliminate need for external fault management circuitry. |
| Small-footprint stability | Stable with 1µF ceramic output capacitor - reduces BOM count and PCB area vs. legacy LDOs requiring ≥10µF tantalum. |
| Wide input range | 2V–6V operation supports direct regulation from Li-ion, Li-Po, 3.3V system rails, or USB VBUS - simplifies multi-rail designs. |
Applications
| Portable Medical Sensors | GSM Baseband Power |
|---|---|
|
Use Scenario: Wearable pulse oximeter with optical sensor, ADC, and BLE radio operating from single CR2032 coin cell. IC Role / Device Role / Timing Role: Primary 2.8V supply for analog front-end and BLE SoC I/O domain, enabling low-noise signal acquisition and reliable wireless transmission. Use Value: 65µA IQ extends battery life beyond 12 months; 80µs startup synchronizes power rail with BLE connection events without delay. |
Use Scenario: TDMA-based GSM handset baseband processor requiring burst-mode 2.8V core voltage during transmit intervals. IC Role / Device Role / Timing Role: Fast-transient LDO supplying 2.8V to DSP and RF synthesizer, responding within 100µs to 100µA ↔ 150mA load swings. Use Value: 65dB PSRR at 100Hz rejects switching noise from buck converter feeding IN; small overshoot prevents logic errors in timing-critical blocks. |
| Industrial IoT Edge Node | USB-Powered Peripherals |
|
Use Scenario: LoRaWAN sensor node powered by 3.6V lithium-thionyl chloride battery, monitoring temperature/humidity in remote locations. IC Role / Device Role / Timing Role: Main 2.8V regulator for ultra-low-power MCU, LoRa transceiver, and precision analog sensor interface. Use Value: 150mV dropout enables >95% usable battery voltage range (down to 2.95V); thermal shutdown prevents failure in enclosed enclosures. |
Use Scenario: USB 2.0 audio adapter with DAC, headphone amp, and USB interface IC - powered solely from 5V USB VBUS. IC Role / Device Role / Timing Role: Clean 2.8V rail for audio codec and analog output stage, decoupling sensitive analog circuitry from noisy digital USB bus. Use Value: 1µF ceramic stability eliminates EMI from USB data lines; ±2% output accuracy ensures consistent DAC reference and THD performance. |
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 |
|---|---|---|---|
| MCP1700T-2802E/TT (Microchip) | 250mA rating, 1.6µA IQ (lower), but only 60dB PSRR at 100Hz and 200mV dropout at 250mA. | Lacks fast transient response; unsuitable for GSM burst loads or high-dV/dt sensor interfaces. | Prefer for ultra-low-power always-on monitoring where load is static and noise rejection is secondary. |
| Torex XC6206P282MR-G (Torex) | 150mA rating, 1µF stability, but 12µA IQ and 350mV dropout at 150mA - higher power loss and narrower input headroom. | Cannot regulate from 2.95V input; limits use with aging Li-ion or low-VIN battery chemistries. | Choose only if cost sensitivity outweighs efficiency and input voltage margin requirements. |
Compared with MCP1700T-2802E/TT and XC6206P282MR-G, AP7311-28WG-7 uniquely balances ultra-low IQ (65µA), low dropout (150mV), high PSRR (65dB), and fast transient response - making it optimal for battery-constrained, noise-sensitive, and dynamically loaded portable systems.
Availability
AP7311-28WG-7 is available at Aetrix Electronics and suitable for portable medical sensors, GSM baseband power, industrial IoT edge nodes, and USB-powered peripherals requiring stable component supply with guaranteed long-term availability.
Supply support for AP7311-28WG-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 high-reliability power management, signal integrity, and protection solutions for industrial, computing, and consumer markets.
The AP7311 belongs to Diodes' low-quiescent-current LDO family, engineered specifically for battery-powered portable electronics demanding extended runtime, fast dynamic response, and robust fault tolerance in compact form factors.
FAQ
What is the minimum input voltage required for AP7311-28WG-7 to maintain regulation at 150mA?
The AP7311-28WG-7 requires VIN ≥ VOUT + Vdropout, where typical dropout is 150mV at 150mA. Thus, minimum functional input is 2.8V + 0.15V = 2.95V. At lower inputs, output voltage drops nonlinearly per the dropout curve on page 6 of the datasheet.
Can AP7311-28WG-7 be used without an output capacitor?
No - the AP7311-28WG-7 requires a minimum 1µF ceramic output capacitor (X5R/X7R, 10–200mΩ ESR) for stability and transient response. Omitting it causes oscillation, excessive ripple, and potential thermal shutdown due to instability-induced power dissipation.
Is the EN pin internally pulled up or does it require external biasing?
The EN pin has no internal pull-up; it is a high-impedance CMOS input with ±1µA leakage. To ensure reliable turn-on, EN must be actively driven above 1.4V (VIH) - typically tied directly to VIN if always-on operation is desired.
Does AP7311-28WG-7 support reverse-voltage or reverse-current protection?
No - the AP7311-28WG-7 lacks reverse-voltage or reverse-current protection. Applying reverse polarity to IN or OUT may damage the device. External protection diodes or MOSFET-based circuits are required in systems prone to back-driving or incorrect insertion.
AP7311-28WG-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:
- Fixed
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 6V
- Voltage - Output (Min/Fixed):
- 2.8V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.3V @ 150mA
- Current - Output:
- 150mA
- Current - Quiescent (Iq):
- 75 µA
- Current - Supply (Max):
- 85 µA
- PSRR:
- 65dB (100Hz)
- Control Features:
- Enable
- Protection Features:
- Over Current, Over Temperature, Short Circuit
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-25
AP7311-28WG-7 FAQ
1.How can I place an order for AP7311-28WG-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP7311-28WG-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 AP7311-28WG-7 reliable?
The price and inventory of AP7311-28WG-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP7311-28WG-7 is usually 5 days.
3.What payment methods are accepted for AP7311-28WG-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP7311-28WG-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP7311-28WG-7?
AP7311-28WG-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP7311-28WG-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 AP7311-28WG-7?
For technical support, including AP7311-28WG-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP7311-28WG-7 requirements.
6.How does Aetrix verify that AP7311-28WG-7 is sourced from the original manufacturer or authorized distributors?
All AP7311-28WG-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 AP7311-28WG-7 meets industry standards.
7.What is the process for return or replacement of AP7311-28WG-7?
All AP7311-28WG-7 units undergo pre-shipment inspection (PSI). If there is an issue with AP7311-28WG-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 AP7311-28WG-7 part is unused and in its original packaging.
Return procedure for AP7311-28WG-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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