My Inquiry
My Account
Skyworks Solutions Inc. AAT1218IWP-1.2-T1
- Part No.:
- AAT1218IWP-1.2-T1
- Manufacturer:
- Skyworks Solutions Inc.
- Package:
- 12-WFDFN Exposed Pad
- Datasheet:
-
AAT1218IWP-1.2-T1.pdf
- Description:
- IC REG BOOST ADJ 1A 12TDFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,640
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
AAT1218IWP-1.2-T1 from Skyworks Solutions is a synchronous boost DC/DC converter delivering up to 1A continuous output current with 1.2MHz fixed-frequency operation, ±2% output voltage accuracy, and 0.5V minimum input voltage - optimized for single-cell Li+ battery-powered portable electronics requiring compact, high-efficiency step-up regulation.
For engineers reviewing the AAT1218IWP-1.2-T1 datasheet, AAT1218IWP-1.2-T1 pinout, AAT1218IWP-1.2-T1 application, or AAT1218IWP-1.2-T1 equivalent, key selection criteria include its adjustable 2.5–5.5V output via external resistor divider, integrated soft-start (0.7ms), anti-ringing EMI suppression, and TDFN33-12 package compatibility with space-constrained PCB layouts.
Technical Context
The AAT1218IWP-1.2-T1 employs slope-compensated current-mode PWM control at a fixed 1.2MHz switching frequency, enabling fast transient response without external compensation. Its dual-MOSFET synchronous rectification eliminates the need for an external Schottky diode when VOUT < 4.5V, reducing conduction loss and board area.
Internal circuitry supports low-voltage start-up (as low as 0.85V at 1mA load), cycle-by-cycle current limiting (2.0A min), over-temperature protection, and automatic power-saving mode during light loads - all while maintaining regulated output across –40°C to +85°C ambient temperature range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | 1A continuous - sufficient to power USB peripherals or display backlight drivers from single-cell Li+ sources. |
| Switching Frequency | 1.2MHz (±25%) - enables use of small 2.2µH inductors and ceramic capacitors, minimizing solution footprint. |
| Input Voltage Range | 0.5V to (VOUT − 0.5V) - supports operation down to near-dead battery levels in portable systems. |
| Output Voltage Accuracy | ±2% over temperature - ensures stable supply for sensitive analog or RF circuitry without trimming. |
| Quiescent Current | 300–700µA - maintains efficiency in always-on subsystems like audio codecs or sensor interfaces. |
| Shutdown Current | <1µA - critical for long-term battery retention in standby or sleep modes. |
| Feedback Reference | 1.200V (±3%) - sets precise output via external resistor divider; enables 2.5–5.5V programmability. |
| Peak Switch Current Limit | 2.0A minimum - protects internal NMOS switch and external inductor under overload or short-circuit conditions. |
Pinout & Package
Package: Pb-free, low-profile TDFN33-12 (3.0 × 3.0 × 0.75 mm), rated for –40°C to +85°C junction temperature, with exposed thermal pad (PGND-connected).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| LX | Switching node | Connects to drain of internal NMOS and source of internal PMOS; ties directly to inductor - high dv/dt node requiring tight layout. |
| VIN | Main power input | Supplies controller core during start-up; transitions to VOUT supply after regulation is established. |
| EN | Enable logic input | Active-high control (VEN(H) = 0.85V @ 3.3V VOUT); pulls device into sub-1µA shutdown state when low. |
| FB | Feedback reference input | Senses resistive divider output; regulates VOUT to 1.200V reference - determines final output voltage per R1/R2 ratio. |
| OUT | Regulated output terminal | Delivers boosted DC voltage; connects to output capacitor and load - shared by two pins for lower impedance path. |
| PGND | Power ground return | High-current return path for VIN, VOUT, and LX loop - must be connected directly to input/output capacitor grounds. |
| GND | Signal ground reference | Low-noise reference for FB, EN, and internal error amplifier - separate from PGND to avoid noise coupling. |
| NC | No-connect | Pins 2 and 5 are internally unconnected - must remain floating; no routing or soldering required. |
Key Features
| Feature | Design Value |
|---|---|
| Synchronous rectification | Eliminates external Schottky diode for VOUT < 4.5V - reduces BOM count and improves efficiency by ~3% vs. asynchronous designs. |
| Integrated soft-start | 0.7ms controlled ramp limits inrush current - prevents input voltage droop and avoids false brown-out detection in host systems. |
| Anti-ringing circuit | Clamps LX node to VIN during discontinuous conduction - suppresses >100MHz ringing, easing EMI compliance testing. |
| No external compensation | Optimized internal compensation network - removes need for external RC networks, simplifying design validation and layout. |
| Power-saving mode | Automatic pulse-skipping below ~10mA load - maintains regulation while reducing IQ to ~400µA, extending battery life. |
| Thermal protection | Junction shutdown at 150°C - prevents permanent damage during sustained overload or poor heatsinking conditions. |
Applications
| Smartphone Display Backlight | Portable Audio DAC Supply |
|---|---|
Use Scenario: Driving white LED strings requiring 5V from a 3.6V Li+ battery in slim smartphone bezels. IC Role / Device Role / Timing Role: Synchronous boost regulator providing tightly regulated 5V rail with minimal ripple and fast load transient response. Use Value: Enables consistent brightness across varying battery voltage (3.0–4.2V), with 95% peak efficiency preserving runtime. |
Use Scenario: Generating clean 3.3V analog supply for high-resolution audio DACs in Bluetooth headphones. IC Role / Device Role / Timing Role: Low-noise, low-ripple DC/DC converter supplying bias for precision audio signal chain components. Use Value: Delivers <80mVpp output ripple (BW=25MHz) and 400µA quiescent current - critical for SNR >105dB performance. |
| USB OTG Power Delivery | Industrial Handheld Scanner |
Use Scenario: Providing 5V/500mA bus power from a 3.7V Li+ cell to enable USB On-The-Go functionality in PDAs. IC Role / Device Role / Timing Role: High-current boost converter with robust current limit and thermal protection for intermittent high-power loads. Use Value: Supports full USB 2.0 specification (5V ±5%) with 1A capability and cycle-by-cycle current limiting for cable fault tolerance. |
Use Scenario: Powering CMOS image sensor and laser driver in ruggedized barcode scanners operating from 1.5V alkaline cells. IC Role / Device Role / Timing Role: Ultra-low-input-voltage boost regulator sustaining 3.3V output down to 0.85V input during battery depletion. Use Value: Extends usable battery life by 20% compared to 1.8V-start-up alternatives, with integrated soft-start preventing sensor reset glitches. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous boost converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS61099YFFR | Lower IQ (200nA shutdown, 400nA quiescent), but only 0.6A max output and 0.7V min start-up - less headroom for 1A loads. | Better suited for ultra-low-power IoT sensors than high-current portable displays or audio. | Select if system prioritizes multi-year coin-cell operation over 1A delivery capability. |
| MAX17222ETA+ | Higher switching frequency (2.5MHz), smaller inductor support, but lower efficiency (90% typ) and no anti-ringing circuit. | Preferred for space-constrained wearables where 1.2mm-height inductors are mandatory. | Choose when PCB area is more constrained than EMI margin or efficiency targets. |
Compared with TPS61099YFFR and MAX17222ETA+, the AAT1218IWP-1.2-T1 uniquely balances 1A output, 1.2MHz operation, anti-ringing EMI control, and 0.5V input capability - making it optimal for cost-sensitive, battery-powered consumer devices needing robust performance across full discharge range.
Availability
AAT1218IWP-1.2-T1 is available at Aetrix Electronics and suitable for smartphone backlighting, portable audio power, USB OTG delivery, and industrial handheld scanner applications requiring stable component supply, long-lifecycle availability, and RoHS-compliant packaging.
Supply support for AAT1218IWP-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 AAT1218IWP-1.2-T1 belongs to Skyworks' AnalogicTech legacy portfolio of high-efficiency DC/DC converters designed specifically for battery-powered portable electronics demanding minimal footprint, low quiescent current, and reliable start-up from depleted cells.
FAQ
What is the minimum input voltage required for AAT1218IWP-1.2-T1 to start up and regulate?
The AAT1218IWP-1.2-T1 achieves start-up at 0.85V (typical) with 1mA load, and guarantees operation down to 0.5V input once running - enabling use with deeply discharged single-cell Li+ or alkaline batteries. This low-voltage capability is implemented via dedicated start-up circuitry that powers the IC from VIN before transitioning to VOUT supply during normal regulation. The AAT1218IWP-1.2-T1 maintains stable output even as input drops below 1.0V, provided the output voltage remains higher than VIN + 0.5V.
Does AAT1218IWP-1.2-T1 require an external Schottky diode?
No - the AAT1218IWP-1.2-T1 integrates synchronous rectification using an internal PMOS switch, eliminating the need for an external Schottky diode when output voltage is below 4.5V. This reduces BOM count, PCB area, and conduction losses. For outputs above 4.5V (e.g., 5.0V), an external Schottky diode is required for proper operation, as specified in the datasheet's Functional Description section. The AAT1218IWP-1.2-T1's internal PMOS is not rated for reverse recovery beyond 4.5V.
How is output voltage set on AAT1218IWP-1.2-T1?
Output voltage is set using an external resistor divider connected between OUT, FB, and GND. The AAT1218IWP-1.2-T1 regulates the FB pin to 1.200V (±3%), so VOUT = 1.20V × (1 + R1/R2). For example, 5.0V output uses R1 = 1.02MΩ and R2 = 324kΩ. The FB pin must not be left floating or connected to other circuitry - doing so will disrupt regulation. The AAT1218IWP-1.2-T1 does not support digital interface or programmable output; adjustment is strictly analog via resistor values.
What thermal considerations apply to AAT1218IWP-1.2-T1 in high-current operation?
The AAT1218IWP-1.2-T1 has ΘJA = 50°C/W and maximum junction temperature of 150°C. At 1A output into 5V with 1.8V input, power dissipation reaches ~350mW - resulting in ~17.5°C rise above ambient on a standard FR4 board. To maintain reliability, the exposed PGND pad must be soldered to a ≥100mm² copper pour, and adjacent high-power traces (LX, VIN, OUT) should be widened. Thermal shutdown activates at 150°C junction, but derating begins above 125°C. The AAT1218IWP-1.2-T1's TDFN33-12 package requires careful thermal land design per Skyworks Package Information.
Can AAT1218IWP-1.2-T1 operate in discontinuous conduction mode (DCM)?
Yes - the AAT1218IWP-1.2-T1 automatically enters discontinuous conduction mode at light loads and engages power-saving mode (pulse-skipping) to maintain regulation while reducing quiescent current to ~400µA. Its anti-ringing circuit actively dampens high-frequency oscillations on the LX node during DCM transitions, suppressing EMI that would otherwise occur in conventional boost converters. This behavior is confirmed in Typical Characteristics waveforms and Functional Description sections of the datasheet. The AAT1218IWP-1.2-T1 does not require external DCM detection or mode control.
AAT1218IWP-1.2-T1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Skyworks Solutions Inc.
- Series:
- -
- Package/Case:
- 12-WFDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Function:
- Step-Up
- Output Configuration:
- Positive
- Topology:
- Boost
- Output Type:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 0.5V
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 2.5V
- Voltage - Output (Max):
- 5.5V
- Current - Output:
- 1A
- Frequency - Switching:
- 1.2MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 12-TDFN (3x3)
AAT1218IWP-1.2-T1 FAQ
1.How can I place an order for AAT1218IWP-1.2-T1 through Aetrix?
Please submit a Request for Quotation (RFQ) for AAT1218IWP-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 AAT1218IWP-1.2-T1 reliable?
The price and inventory of AAT1218IWP-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 AAT1218IWP-1.2-T1 is usually 5 days.
3.What payment methods are accepted for AAT1218IWP-1.2-T1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AAT1218IWP-1.2-T1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AAT1218IWP-1.2-T1?
AAT1218IWP-1.2-T1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AAT1218IWP-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 AAT1218IWP-1.2-T1?
For technical support, including AAT1218IWP-1.2-T1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AAT1218IWP-1.2-T1 requirements.
6.How does Aetrix verify that AAT1218IWP-1.2-T1 is sourced from the original manufacturer or authorized distributors?
All AAT1218IWP-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 AAT1218IWP-1.2-T1 meets industry standards.
7.What is the process for return or replacement of AAT1218IWP-1.2-T1?
All AAT1218IWP-1.2-T1 units undergo pre-shipment inspection (PSI). If there is an issue with AAT1218IWP-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 AAT1218IWP-1.2-T1 part is unused and in its original packaging.
Return procedure for AAT1218IWP-1.2-T1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AAT1218IWP-1.2-T1 Tags
-
TPS562201DDCR
Texas Instruments
-
MC34063ABD-TR
STMicroelectronics
-
TPS561201DDCR
Texas Instruments
-
MC33063ADR
Texas Instruments
-
MC34063ADR
Texas Instruments
-
TPS560200DBVR
Texas Instruments
-
AP3012KTR-G1
Diodes Incorporated
-
TLV61048DBVR
Texas Instruments
-
AZ34063UMTR-G1
Diodes Incorporated
-
TPS562200DDCR
Texas Instruments
-
AP62300TWU-7
Diodes Incorporated
-
MC34063EBD-TR
STMicroelectronics
Tech Hub
Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
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…
