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Diodes Incorporated AP7311-18WG-7
- Part No.:
- AP7311-18WG-7
- Manufacturer:
- Diodes Incorporated
- Package:
- SC-74A, SOT-753
- Datasheet:
-
AP7311-18WG-7.pdf
- Description:
- IC REG LINEAR 1.8V 150MA SOT25
- Quantity:
- Payment:
- Shipping:
Inventory:8,974
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Product details
Overview
AP7311-18WG-7 from Diodes Incorporated is a 150mA fixed-output low-dropout linear regulator with 1.8V output, 65µA quiescent current, 150mV dropout at full load, and SOT25 package. It integrates enable control, thermal shutdown, current limiting, and short-circuit protection - designed for battery-powered portable devices requiring stable, ultra-low-power voltage regulation.
For engineers reviewing the AP7311-18WG-7 datasheet, AP7311-18WG-7 pinout, AP7311-18WG-7 application, or AP7311-18WG-7 equivalent, key selection criteria include its fast 80µs startup time, 65dB PSRR at 100Hz, stability with 1µF ceramic output capacitor, and operation across –40°C to +85°C ambient range.
Technical Context
The AP7311-18WG-7 implements a PMOS pass transistor architecture with internal 0.4V bandgap reference and error amplifier, enabling fixed 1.8V output without external feedback components. Its EN pin provides logic-level (VIH = 1.4V) active-high control for system power sequencing.
Protection circuitry includes foldback current limiting (300mA typical), short-circuit clamping (50mA), and thermal shutdown at 140°C with 15°C hysteresis. The regulator maintains regulation down to zero load and remains stable with output capacitors as low as 1µF (X7R/X5R, 10–200mΩ ESR).
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 in microcontrollers and memory. |
| Quiescent Current | 65µA typical at 150mA load; minimizes standby power loss in always-on battery systems like IoT sensors. |
| Dropout Voltage | 150mV typical at 150mA; allows operation from 2.0V input while sustaining 1.8V output - critical for single-cell Li-ion or alkaline applications. |
| PSRR | 65dB at 100Hz; suppresses low-frequency ripple from switching converters or noisy DC sources feeding the LDO input. |
| Start-up Time | 80µs from EN assertion to regulated 1.8V output; supports rapid wake-up in duty-cycled systems such as GSM baseband ICs. |
| Thermal Shutdown | Triggers at 140°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 (e.g., 1× LiFePO₄, 2× alkaline) and intermediate supply rails. |
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 pad not present; θJA = 190°C/W on standard FR-4 PCB with minimum recommended copper layout.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN (Pin 1) | Regulator input supply | Must be bypassed with ≥1µF ceramic capacitor close to pin; supports up to 7V absolute max, but rated 2–6V operation. |
| GND (Pin 2) | Power ground reference | Common return path for IN, OUT, EN, and internal circuitry; requires low-impedance connection to minimize noise coupling. |
| EN (Pin 3) | Enable control input | Active-high logic interface (VIH ≥1.4V); tie to IN for always-on operation; drives <1µA leakage current when inactive. |
| NC (Pin 4) | No connection | Internally unconnected; must remain floating - no external bias or routing permitted. |
| OUT (Pin 5) | Regulated 1.8V output | Delivers up to 150mA; requires ≥1µF ceramic capacitor (X7R/X5R, 10–200mΩ ESR) placed adjacent to pin for stability. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low quiescent current | 65µA at full 150mA load ensures >1-year battery life in coin-cell–powered devices operating at µA-average current. |
| Fast transient response | Stable 1.8V output under 0→150mA load steps with minimal overshoot/undershoot - essential for DSP and RF chipset power domains. |
| Single-capacitor stability | Guaranteed stability with only 1µF ceramic output capacitor eliminates need for bulk electrolytics, reducing BOM count and board area. |
| Integrated protection suite | Current limit (300mA), short-circuit clamp (50mA), and thermal shutdown (140°C) operate autonomously without external components. |
| Logic-compatible enable | EN pin accepts standard 1.8V/3.3V GPIO signals; VIH threshold (1.4V) ensures compatibility with low-voltage microcontrollers. |
Applications
| Portable Medical Sensors | Industrial Handheld Terminals |
|---|---|
|
Use Scenario: Continuous glucose monitor (CGM) using coin-cell battery and ultra-low-power MCU with 1.8V I/O. IC Role / Device Role / Timing Role: Primary 1.8V supply for sensor interface and BLE radio subsystem. Use Value: 65µA IQ extends battery life beyond 12 months; 80µs startup enables rapid sensor wake-up on demand without voltage droop. |
Use Scenario: Ruggedized barcode scanner with ARM Cortex-M4 MCU and 1.8V display driver. IC Role / Device Role / Timing Role: Point-of-load regulator for 1.8V digital core rail, controlled via host processor GPIO. Use Value: 150mV dropout permits operation from degraded 2.2V battery; EN pin enables synchronized power-down during idle periods. |
| Wireless IoT Edge Nodes | Automotive Infotainment Accessories |
|
Use Scenario: LoRaWAN node powered by AA batteries, transmitting sensor data every 5 minutes. IC Role / Device Role / Timing Role: Stable 1.8V rail for RF transceiver and flash memory during burst transmission. Use Value: 65dB PSRR at 100Hz rejects switching noise from buck converter supplying the LDO input, preserving RF sensitivity. |
Use Scenario: USB-powered car adapter with Bluetooth audio streaming and 1.8V DAC interface. IC Role / Device Role / Timing Role: Secondary LDO for noise-sensitive analog audio path downstream of USB 5V input. Use Value: Small 1µF output cap meets space constraints; thermal shutdown prevents failure during hot-car cabin operation (85°C ambient). |
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 | 150mA, 1.8V fixed, 1.6µA IQ (lower), but 600mV dropout at 150mA (higher); SOT23-5 package. | Better for ultra-low-IQ standby, worse for low-input-voltage operation (requires ≥2.4V input). | Select if system prioritizes nanowatt standby over input voltage headroom. |
| TPS70618DBVR | 150mA, 1.8V fixed, 9.5µA IQ, 220mV dropout at 150mA; includes power-good flag; SOT23-5. | Requires additional PG monitoring circuitry; higher cost; tighter IQ spec but slower 150µs startup. | Select if system requires power-good signaling and can accept higher dropout and longer startup. |
Compared with MCP1700-1802E/TO and TPS70618DBVR, the AP7311-18WG-7 delivers optimal balance of low dropout (150mV), moderate IQ (65µA), and fast startup (80µs) in a cost-effective SOT25 package - ideal for space-constrained, battery-fed 1.8V systems where input voltage may dip near 2.0V.
Availability
AP7311-18WG-7 is available at Aetrix Electronics and suitable for portable medical sensors, industrial handheld terminals, wireless IoT edge nodes, and automotive infotainment accessories requiring stable component supply with guaranteed long-term manufacturability.
Supply support for AP7311-18WG-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 protection in compact SOT25 packaging.
FAQ
What is the minimum input voltage required for AP7311-18WG-7 to maintain 1.8V output at 150mA?
The AP7311-18WG-7 requires a minimum input voltage of 1.95V (1.8V + 150mV dropout) to sustain regulation at full 150mA load. Its specified operating range starts at 2.0V, providing 50mV margin for line tolerance and PCB drop - making it suitable for single-cell LiFePO₄ (2.5–3.6V) and two-alkaline (2.4–3.2V) sources.
Can AP7311-18WG-7 operate without an output capacitor?
No - the AP7311-18WG-7 requires a minimum 1µF ceramic output capacitor (X7R/X5R, 10–200mΩ ESR) placed adjacent to the OUT and GND pins for stability and transient response. Omitting it causes oscillation and output voltage collapse under load; the device is not internally compensated for zero-capacitance operation.
Is the EN pin 5V-tolerant when used with a 5V microcontroller GPIO?
No - the EN pin absolute maximum rating is VIN + 0.3V. With a 5V input, EN must not exceed 5.3V, but more critically, its VIH threshold is only 1.4V. A 5V GPIO will exceed the EN pin's input voltage rating unless level-shifted or current-limited; use a resistive divider or dedicated level shifter for safe interfacing.
Does AP7311-18WG-7 require a minimum load current to maintain regulation?
No - the AP7311-18WG-7 remains stable and fully regulated from zero load up to 150mA. Its internal architecture does not require minimum load current, eliminating the need for bleed resistors and simplifying design for intermittent-load applications like sensor wake-up circuits.
AP7311-18WG-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):
- 1.8V
- 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
AP7311-18WG-7 FAQ
1.How can I place an order for AP7311-18WG-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP7311-18WG-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 AP7311-18WG-7 reliable?
The price and inventory of AP7311-18WG-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP7311-18WG-7 is usually 5 days.
3.What payment methods are accepted for AP7311-18WG-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP7311-18WG-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP7311-18WG-7?
AP7311-18WG-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP7311-18WG-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 AP7311-18WG-7?
For technical support, including AP7311-18WG-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP7311-18WG-7 requirements.
6.How does Aetrix verify that AP7311-18WG-7 is sourced from the original manufacturer or authorized distributors?
All AP7311-18WG-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 AP7311-18WG-7 meets industry standards.
7.What is the process for return or replacement of AP7311-18WG-7?
All AP7311-18WG-7 units undergo pre-shipment inspection (PSI). If there is an issue with AP7311-18WG-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 AP7311-18WG-7 part is unused and in its original packaging.
Return procedure for AP7311-18WG-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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