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Skyworks Solutions Inc. AAT3238IJS-1.2-T1
- Part No.:
- AAT3238IJS-1.2-T1
- Manufacturer:
- Skyworks Solutions Inc.
- Package:
- -
- Datasheet:
-
AAT3238IJS-1.2-T1.pdf
- Description:
- IC REG LINEAR 1.2V 300MA 8SC70JW
- Quantity:
- Payment:
- Shipping:
Inventory:21,000
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Product details
Overview
AAT3238IJS-1.2-T1 from Skyworks Solutions is a 300mA, 1.2V fixed-output MicroPower low dropout (LDO) linear regulator in an 8-pin SC70JW package, featuring 400mV typical 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 AAT3238IJS-1.2-T1 datasheet, AAT3238IJS-1.2-T1 pinout, AAT3238IJS-1.2-T1 application, or AAT3238IJS-1.2-T1 equivalent, key selection criteria include guaranteed 300mA output capability, factory-programmed 1.2V output, enable-controlled shutdown with <1µA leakage, bypass-capacitor-enhanced PSRR (67dB @ 1kHz), and compatibility with low-ESR ceramic capacitors.
Technical Context
The AAT3238IJS-1.2-T1 employs a proprietary CMOS-based LDO architecture with active error amplifier feedback control to achieve fast line/load transient response (<60mV deviation under 300mA step load) and high-speed turn-on/turn-off timing. Its fast-start control circuit accelerates internal biasing during power-up, while an active output pull-down circuit ensures rapid discharge of COUT during shutdown.
It integrates short-circuit protection (600mA limit), thermal shutdown at 145°C with 12°C hysteresis, and reverse-voltage protection awareness via internal parasitic diode management. The BYP pin enables external 10nF capacitor connection to improve PSRR and reduce output noise (50µVrms) without compromising stability on 2.2µF ceramic output capacitance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.2V ±1.5% over -40°C to +85°C - ensures stable core voltage for low-power microcontrollers and RF ICs. |
| Max Output Current | 300mA guaranteed - supports single-rail power for baseband processors or sensor subsystems. |
| Dropout Voltage | 400mV typical at 300mA - enables operation from 1.6V input (e.g., single Li-ion cell down to 2.8V or dual NiMH). |
| Quiescent Current | 70µA typical - 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) - suitable for noise-sensitive analog circuits like ADC references or RF synthesizers. |
| Enable Threshold | VEN(H) = 1.5V, VEN(L) = 0.6V - compatible with 1.8V/3.3V logic without level-shifting. |
Pinout & Package
The AAT3238IJS-1.2-T1 is housed in an 8-pin SC70JW package (2.20mm × 2.00mm × 0.85mm), optimized for space-constrained portable designs. Pin assignments are validated per Skyworks datasheet revision 202258A (August 2012).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | IN | Input voltage supply pin; requires ≥1µF decoupling capacitor close to pin for stability and line transient suppression. |
| 2, 3, 4 | OUT | Regulated 1.2V output; connects to 2.2µF ceramic capacitor for optimal load regulation and transient response. |
| 5 | GND | Ground reference for all internal circuits; must be low-impedance connection to system ground plane. |
| 6 | EN | Active-high enable control; pulls device into <1µA shutdown when ≤0.6V; ties to VIN for permanent ON operation. |
| 7 | BYP | Bypass capacitor terminal; connects 10nF NPO/C0G capacitor to GND to improve PSRR and reduce output noise. |
| 8 | IN | Second input voltage connection; electrically tied to Pin 1 internally - used for enhanced thermal dissipation and current sharing. |
Key Features
| Feature | Design Value |
|---|---|
| Low Dropout Performance | 400mV typical at 300mA enables use with weak or deeply discharged batteries while maintaining regulation. |
| Fast Transient Response | Sub-10µs recovery from 300mA load steps minimizes voltage droop in burst-mode digital loads. |
| Integrated Protection | Short-circuit current limiting (600mA) and thermal shutdown (145°C) prevent damage during fault conditions. |
| Ultra-Low Quiescent Current | 70µA operation allows >1-year battery life in low-duty-cycle IoT sensors powered by coin cells. |
| Logic-Compatible Enable | CMOS-level EN pin eliminates need for external level shifters in mixed-voltage systems. |
| No-Load Stability | Maintains regulation and stability at zero output current - critical for sleep-mode operation in handheld devices. |
Applications
| Mobile Baseband Power | Digital Camera Sensor Bias |
|---|---|
Use Scenario: Powers ARM Cortex-M4 core and peripheral I/O in GSM/UMTS feature phones operating from single-cell Li-ion battery. IC Role / Device Role / Timing Role: Primary 1.2V core LDO delivering clean, regulated voltage with fast response to CPU clock-gating transients. Use Value: Enables reliable operation down to 2.8V input while suppressing ripple from switching PMIC stages upstream. | Use Scenario: Supplies image sensor analog front-end (AFE) and ISP core in compact digital cameras. IC Role / Device Role / Timing Role: Low-noise 1.2V bias source ensuring minimal quantization noise in 12-bit ADC conversion paths. Use Value: 50µVrms output noise and 67dB PSRR prevent switching artifacts from corrupting high-SNR image capture. |
| Notebook Platform Controller Hub | Wearable Health Monitor MCU |
Use Scenario: Provides always-on 1.2V rail for embedded controller (EC) and keyboard controller in ultra-thin notebooks. IC Role / Device Role / Timing Role: Standby LDO with shutdown mode activated during S3/S4 sleep states to minimize system leakage. Use Value: 1µA shutdown current and fast wake-up (<15µs enable delay) meet ACPI power-state transition requirements. | Use Scenario: Powers ultra-low-power BLE SoC (e.g., Nordic nRF52832) in wrist-worn ECG monitors running on CR2032 coin cell. IC Role / Device Role / Timing Role: Primary system regulator supporting intermittent sensing bursts and Bluetooth advertising intervals. Use Value: 70µA quiescent current and 300mA peak capability extend battery life beyond 6 months between replacements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Torex XC6206P122MR-G | 200mA max output, 350mV dropout at 100mA, no enable pin, SOT-23-3 package | Lacks shutdown control and full 300mA capability - suitable only for lower-current always-on rails | Select when board space is critical and enable functionality is unnecessary |
| Richtek RT9193-12GB | 300mA output, 250mV dropout at 300mA, 65µA IQ, but only available in SOT-23-5 package | Higher dropout margin not required; lacks BYP pin for PSRR/noise optimization | Choose for cost-sensitive designs where 1.2V accuracy and basic LDO performance suffice |
Compared with XC6206P122MR-G and RT9193-12GB, the AAT3238IJS-1.2-T1 uniquely combines factory-programmed 1.2V output, 300mA capability, enable control, and BYP-pin noise reduction - making it the only option among the three qualified for noise-sensitive, high-transient, battery-operated applications requiring full-feature LDO integration.
Availability
AAT3238IJS-1.2-T1 is available at Aetrix Electronics and suitable for cellular handsets, digital camera modules, and wearable health monitors requiring stable component supply with consistent parametric performance across production lots.
Supply support for AAT3238IJS-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, broadband, automotive, and industrial markets.
The AAT3238 product line delivers MicroPower LDO regulators engineered specifically for portable electronics demanding ultra-low IQ, fast transient response, and robust protection - targeting battery-powered communication and imaging devices.
FAQ
What is the maximum input voltage rating for the AAT3238IJS-1.2-T1?
The AAT3238IJS-1.2-T1 has an absolute maximum input voltage of 6V. However, the recommended operating range is (VOUT + VDO) to 5.5V - meaning for the 1.2V version, minimum valid input is ~1.6V and maximum continuous operating input is 5.5V. Exceeding 6V risks permanent damage per Absolute Maximum Ratings.
Does the AAT3238IJS-1.2-T1 require external capacitors, and what values are recommended?
Yes, the AAT3238IJS-1.2-T1 requires external capacitors: a minimum 1µF ceramic capacitor on IN, 2.2µF ceramic on OUT, and optionally 10nF NPO/C0G on BYP. These values are specified in the datasheet for guaranteed stability, transient response, and PSRR/noise performance. Using smaller or non-ceramic types may degrade regulation or cause oscillation.
How does the enable pin (EN) function on the AAT3238IJS-1.2-T1?
The EN pin on the AAT3238IJS-1.2-T1 is active-high with logic thresholds of VEN(H) = 1.5V (turn-on) and VEN(L) = 0.6V (turn-off). When pulled low, the device enters shutdown consuming <1µA. An internal 1.5kΩ pull-down discharges COUT during shutdown. The pin must never be left floating and is CMOS-compatible.
Can the AAT3238IJS-1.2-T1 be used with input voltages below 2.5V?
Yes - the AAT3238IJS-1.2-T1 operates with input voltages as low as (VOUT + VDO) ≈ 1.6V, verified down to 2.5V in electrical characteristics testing. At 1.6V input, it delivers full 300mA with ~400mV dropout. Operation below 2.5V is supported per datasheet Section 3 (Recommended Operating Conditions), though PSRR and noise specs are characterized at VIN ≥ 2.5V.
Is the AAT3238IJS-1.2-T1 RoHS and halogen-free compliant?
Yes, the AAT3238IJS-1.2-T1 is a Skyworks Green™ product, fully compliant with RoHS directives and halogen-free per IEC 61249-2-21. It meets all applicable environmental legislation including lead-free (Pb-free) packaging requirements, as confirmed in the Ordering Information section of the official datasheet.
AAT3238IJS-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:
- -
AAT3238IJS-1.2-T1 FAQ
1.How can I place an order for AAT3238IJS-1.2-T1 through Aetrix?
Please submit a Request for Quotation (RFQ) for AAT3238IJS-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 AAT3238IJS-1.2-T1 reliable?
The price and inventory of AAT3238IJS-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 AAT3238IJS-1.2-T1 is usually 5 days.
3.What payment methods are accepted for AAT3238IJS-1.2-T1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AAT3238IJS-1.2-T1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AAT3238IJS-1.2-T1?
AAT3238IJS-1.2-T1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AAT3238IJS-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 AAT3238IJS-1.2-T1?
For technical support, including AAT3238IJS-1.2-T1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AAT3238IJS-1.2-T1 requirements.
6.How does Aetrix verify that AAT3238IJS-1.2-T1 is sourced from the original manufacturer or authorized distributors?
All AAT3238IJS-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 AAT3238IJS-1.2-T1 meets industry standards.
7.What is the process for return or replacement of AAT3238IJS-1.2-T1?
All AAT3238IJS-1.2-T1 units undergo pre-shipment inspection (PSI). If there is an issue with AAT3238IJS-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 AAT3238IJS-1.2-T1 part is unused and in its original packaging.
Return procedure for AAT3238IJS-1.2-T1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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