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Skyworks Solutions Inc. AAT3218IGV-1.2-T1
- Part No.:
- AAT3218IGV-1.2-T1
- Manufacturer:
- Skyworks Solutions Inc.
- Package:
- -
- Datasheet:
-
AAT3218IGV-1.2-T1.pdf
- Description:
- IC REG LINEAR 1.2V 150MA SOT23-5
- Quantity:
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Inventory:15,000
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Product details
Overview
AAT3218IGV-1.2-T1 from Skyworks Solutions is a 150mA, 1.2V fixed-output Micropower low-dropout linear regulator in SOT23-5 package, featuring 200mV dropout at full load, ±1.5% output voltage accuracy over temperature, and 70µA quiescent current - designed for battery-powered portable electronics requiring fast transient response and low-noise power delivery.
For engineers reviewing the AAT3218IGV-1.2-T1 datasheet, AAT3218IGV-1.2-T1 pinout, AAT3218IGV-1.2-T1 application, or AAT3218IGV-1.2-T1 equivalent, key selection considerations include its factory-programmed 1.2V output, enable-controlled shutdown mode (<1µA), BYP pin for PSRR/noise optimization, thermal and short-circuit protection, and compatibility with low-ESR ceramic capacitors (CIN ≥1µF, COUT =2.2µF).
Technical Context
The AAT3218IGV-1.2-T1 employs a proprietary CMOS-based LDO architecture with active error amplifier feedback and fast-start control circuitry to achieve sub-15µs enable delay and rapid load transient recovery. Its internal reference bypass (BYP) pin enables external 10nF capacitor integration to improve PSRR by up to 67dB at 1kHz and reduce output noise to 50µVRMS (300Hz–50kHz).
It integrates an active output pull-down during shutdown, over-temperature shutdown at 145°C with 12°C hysteresis, and current-limit protection triggering at ~600mA. The device operates across –40°C to +85°C ambient, supports input voltages from (VOUT + VDO) to 5.5V, and maintains stability with no minimum load requirement.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.2V ±1.5% (25°C), ±2.5% (–40°C to +85°C) - ensures stable core logic or RF bias rail under thermal variation. |
| Max Output Current | 150mA guaranteed - sufficient for powering baseband processors, Bluetooth radios, or sensor signal chains. |
| Dropout Voltage | 200mV typical at 150mA - enables operation from single-cell Li-ion (3.0V min) down to 1.4V input while sustaining 1.2V output. |
| Quiescent Current | 70µA typical, ≤125µA max - extends battery life in always-on standby modes of portable devices. |
| PSRR | 67dB @ 1kHz, 47dB @ 10kHz - suppresses switching noise from DC/DC converters feeding the LDO input. |
| Output Noise | 50µVRMS (300Hz–50kHz) - meets low-noise requirements for ADC references or RF synthesizer supplies. |
| Enable Threshold | VEN(H) = 1.5V, VEN(L) = 0.6V - compatible with standard CMOS logic and allows direct connection to microcontroller GPIOs. |
Pinout & Package
Package: Pb-free, space-saving 5-pin SOT23-5 (JEDEC MO-178AA), 2.9mm × 1.6mm footprint, 1.1mm height - optimized for high-density portable PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (IN) | Input voltage supply | Accepts 2.5V to 5.5V input; requires ≥1µF decoupling capacitor placed adjacent to pin for stability and line transient suppression. |
| 2 (GND) | Power ground reference | Common return path for IN, OUT, BYP, and EN; must connect directly to low-impedance ground plane to preserve PSRR and noise performance. |
| 3 (EN) | Active-high enable control | Pull ≥1.5V to enable regulation; pull ≤0.6V to enter shutdown (<1µA IQ); must not float - tie to IN if unused. |
| 4 (BYP) | Reference bypass node | Connect 10nF NPO/C0G capacitor to GND to improve PSRR and reduce output noise; larger values slow turn-on time. |
| 5 (OUT) | Regulated output | Delivers 1.2V at up to 150mA; requires 2.2µF ceramic capacitor (X7R/X5R) directly between OUT and GND for stability and load transient response. |
Key Features
| Feature | Design Value |
|---|---|
| Fast transient response | Load step recovery <100µs (1mA ↔ 150mA), line step recovery <50µs - maintains voltage integrity during burst-mode processor activity. |
| Low-noise regulation | 50µVRMS output noise with 10nF BYP capacitor - suitable for noise-sensitive analog/RF circuits without additional filtering. |
| Thermal & fault protection | Integrated over-temperature shutdown (145°C trip, 12°C hysteresis) and short-circuit current limiting (~600mA) - prevents damage during abnormal operating conditions. |
| Ceramic capacitor compatibility | Stable with low-ESR ceramic capacitors (0.47µF–10µF); no ESR minimum required - reduces BOM cost and board area vs. tantalum alternatives. |
| Shutdown mode | <1µA shutdown current with active pull-down on OUT - discharges output capacitance rapidly and eliminates leakage paths in sleep states. |
Applications
| Bluetooth™ Headsets | Cellular Phone Baseband |
|---|---|
Use Scenario: Powering Bluetooth audio codec and RF transceiver in compact wireless earbuds with single-cell Li-ion battery. IC Role / Device Role / Timing Role: Primary 1.2V LDO supplying digital core and RF section; provides clean, low-noise, fast-response power during voice call bursts and BLE advertising intervals. Use Value: Enables >10-hour talk time via 70µA quiescent current and extends battery runtime during deep-sleep modes using EN-controlled shutdown. | Use Scenario: Supplying 1.2V core voltage to application processor or modem baseband IC in GSM/UMTS handsets. IC Role / Device Role / Timing Role: Low-dropout regulator delivering stable core rail during high-current transmit pulses and fast processor wake-up events. Use Value: Maintains regulation under 150mA dynamic loads with <2.5mV line/load transient deviation - prevents processor brownouts and system resets. |
| Digital Camera Sensor Interface | Portable Medical Sensors |
Use Scenario: Providing regulated 1.2V supply to CMOS image sensor interface logic and timing controller in pocket-sized cameras. IC Role / Device Role / Timing Role: Precision voltage source for sensor clocking and data capture circuitry; BYP pin used to minimize switching noise coupling into analog pixel readout paths. Use Value: 50µVRMS noise and 67dB PSRR ensure clean timing signals and high SNR in image capture - critical for low-light performance. | Use Scenario: Powering ultra-low-power biosensor front-end ASICs (e.g., ECG, pulse oximetry) in wearable health monitors. IC Role / Device Role / Timing Role: Micropower LDO supplying analog signal chain and ADC reference; EN pin synchronized with measurement sampling intervals to minimize average current draw. Use Value: 70µA IQ and no-load stability allow continuous monitoring with multi-day battery life on coin-cell or small Li-ion batteries. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MCP1700T-1202E/TT | 150mA, 1.2V, 6µA IQ, but 600mV dropout at 150mA; SOT23-3 (no EN/BYP pins) | Lacks enable control and bypass pin - unsuitable for noise-critical or dynamically powered systems | Choose only for ultra-low-quiescent, non-shutdown, low-performance applications where size and cost outweigh PSRR/noise needs. |
| Torex XC6206P122MR-G | 150mA, 1.2V, 3µA IQ, 350mV dropout at 150mA; SOT23-5 with EN but no BYP pin | No reference bypass capability - cannot match AAT3218IGV-1.2-T1's 50µVRMS noise or 67dB PSRR | Select when lowest possible IQ is mandatory and noise/ripple rejection is secondary; verify thermal margin due to higher dropout. |
Compared with MCP1700T-1202E/TT and XC6206P122MR-G, the AAT3218IGV-1.2-T1 uniquely balances ultra-low noise (50µVRMS), high PSRR (67dB), fast transient response, and integrated EN/BYP functionality - making it the only option among the three suitable for noise-sensitive, dynamically powered portable systems requiring both efficiency and signal integrity.
Availability
AAT3218IGV-1.2-T1 is available at Aetrix Electronics and suitable for Bluetooth headsets, cellular phone baseband subsystems, and portable medical sensors requiring stable component supply, long-term lifecycle support, and consistent parametric performance across production batches.
Supply support for AAT3218IGV-1.2-T1 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
Skyworks Solutions is a global semiconductor company specializing in analog and mixed-signal connectivity solutions for wireless, automotive, and industrial markets.
The AAT3218IGV-1.2-T1 belongs to Skyworks' MicroPower LDO family, engineered specifically for portable battery-operated devices demanding ultra-low quiescent current, fast transient response, and low-noise regulation without compromising thermal robustness or protection features.
FAQ
What is the maximum input voltage for AAT3218IGV-1.2-T1?
The absolute maximum input voltage for AAT3218IGV-1.2-T1 is 6V per Absolute Maximum Ratings. However, the recommended operating range is (VOUT + VDO) to 5.5V - i.e., ≥1.4V to 5.5V for the 1.2V version. At 25°C ambient, thermal limits allow up to 5.8V with 150mA load; at 85°C, safe continuous operation is limited to ~3.7V for the same load. Exceeding these values risks thermal shutdown.
Does AAT3218IGV-1.2-T1 require an external bypass capacitor?
No, the AAT3218IGV-1.2-T1 functions correctly without a bypass capacitor on the BYP pin. However, connecting a 10nF NPO/C0G capacitor from BYP to GND improves PSRR by up to 67dB at 1kHz and reduces output noise to 50µVRMS. Omitting it degrades noise and ripple rejection but retains full regulation capability.
What is the shutdown current of AAT3218IGV-1.2-T1?
The shutdown current of AAT3218IGV-1.2-T1 is guaranteed ≤1µA at VIN = 5V and VEN = 0V. During shutdown, an internal 1.5kΩ resistor actively pulls the OUT pin to GND to discharge the output capacitor - ensuring rapid voltage decay and eliminating floating outputs in sleep states.
Can AAT3218IGV-1.2-T1 operate with zero load current?
Yes, AAT3218IGV-1.2-T1 is explicitly designed for no-load stability. It maintains 1.2V output regulation and loop stability with 0mA output current across –40°C to +85°C, making it suitable for systems where downstream circuitry may be fully powered down while the LDO remains enabled.
What capacitor types are recommended for AAT3218IGV-1.2-T1?
AAT3218IGV-1.2-T1 is optimized for X7R or X5R ceramic capacitors: CIN ≥1µF (placed near IN pin), COUT =2.2µF (placed near OUT/GND), and CBYP =10nF NPO/C0G (placed directly between BYP and GND). Tantalum or aluminum electrolytics are acceptable for CIN but not recommended for COUT or CBYP due to ESR and leakage limitations.
AAT3218IGV-1.2-T1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Skyworks Solutions Inc.
- Series:
- *
- Package/Case:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Output Configuration:
- -
- Output Type:
- -
- Number of Regulators:
- -
- Voltage - Input (Max):
- -
- Voltage - Output (Min/Fixed):
- -
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- -
- Current - Output:
- -
- Current - Quiescent (Iq):
- -
- Current - Supply (Max):
- -
- PSRR:
- -
- Control Features:
- -
- Protection Features:
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- -
- Supplier Device Package:
- -
AAT3218IGV-1.2-T1 FAQ
1.How can I place an order for AAT3218IGV-1.2-T1 through Aetrix?
Please submit a Request for Quotation (RFQ) for AAT3218IGV-1.2-T1 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 AAT3218IGV-1.2-T1 reliable?
The price and inventory of AAT3218IGV-1.2-T1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AAT3218IGV-1.2-T1 is usually 5 days.
3.What payment methods are accepted for AAT3218IGV-1.2-T1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AAT3218IGV-1.2-T1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AAT3218IGV-1.2-T1?
AAT3218IGV-1.2-T1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AAT3218IGV-1.2-T1 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 AAT3218IGV-1.2-T1?
For technical support, including AAT3218IGV-1.2-T1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AAT3218IGV-1.2-T1 requirements.
6.How does Aetrix verify that AAT3218IGV-1.2-T1 is sourced from the original manufacturer or authorized distributors?
All AAT3218IGV-1.2-T1 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 AAT3218IGV-1.2-T1 meets industry standards.
7.What is the process for return or replacement of AAT3218IGV-1.2-T1?
All AAT3218IGV-1.2-T1 units undergo pre-shipment inspection (PSI). If there is an issue with AAT3218IGV-1.2-T1, 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 AAT3218IGV-1.2-T1 part is unused and in its original packaging.
Return procedure for AAT3218IGV-1.2-T1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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