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Skyworks Solutions Inc. AAT1219IWP-1-1.2-T1
- Part No.:
- AAT1219IWP-1-1.2-T1
- Manufacturer:
- Skyworks Solutions Inc.
- Package:
- 12-WFDFN Exposed Pad
- Datasheet:
-
AAT1219IWP-1-1.2-T1.pdf
- Description:
- IC REG BOOST ADJ 800MA 12TDFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,483
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Product details
Overview
AAT1219IWP-1-1.2-T1 from Skyworks Solutions is a high-current synchronous step-up DC/DC converter with programmable NMOS peak current limit (500mA–2.5A), 1.2MHz fixed-frequency PWM control, and true load disconnect during shutdown. It operates from 2.4V input up to VOUT + 0.25V, delivers adjustable output from 3.0V to 5.0V via external resistor divider, and integrates reverse current blocking, OVP, short-circuit, and over-temperature protection - optimized for GSM/3G modem card pulse-load applications.
For engineers reviewing the AAT1219IWP-1-1.2-T1 datasheet, AAT1219IWP-1-1.2-T1 pinout, AAT1219IWP-1-1.2-T1 application, or AAT1219IWP-1-1.2-T1 equivalent, this device supports critical design requirements including inrush-limited startup (500mA PMOS linear mode), ultra-low shutdown current (<1μA), and integrated compensation enabling stable operation with only three external components (L, CIN, COUT).
Technical Context
The AAT1219IWP-1-1.2-T1 employs peak current-mode control with internal slope compensation and dual-stage current limiting: a fixed 500mA PMOS linear inrush limiter during startup, and an externally resistor-programmable NMOS peak current limit (500mA–2.5A) for steady-state boost operation. Its 1.2MHz switching frequency enables compact 4.7μH inductor and low-ESR ceramic capacitor designs.
True load disconnect is achieved via substrate-controlled power selection that disables the parasitic body diode path between IN and OUT during shutdown, eliminating leakage paths. The RDY open-drain indicator asserts when VOUT reaches 95% of nominal voltage, with 8% hysteresis for noise immunity.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VIN Range | 2.4V to VOUT + 0.25V - Enables operation from single-cell Li-ion or NiMH batteries while supporting output voltages up to 5.0V. |
| VOUT Programmability | 3.0V–5.0V via external resistor divider - Set by feedback reference of 0.6V at FB pin; R2 = 59kΩ recommended for noise immunity. |
| NMOS Peak Current Limit | 500mA–2.5A via ISET-to-GND resistor - Configurable using RSET = 105 / ILIM (kΩ); e.g., 40.2kΩ sets 2.5A limit. |
| Switching Frequency | 1.2MHz ±10% - Fixed-frequency PWM operation ensures predictable EMI profile and allows small 4.7μH inductors. |
| Efficiency | Up to 95% - Achieved via synchronous rectification, low RDS(ON) (250mΩ NMOS / 300mΩ PMOS @ VOUT = 3.8V), and light-load frequency modulation. |
| Shutdown Current | <1μA - Enabled by true load disconnect architecture; critical for battery-powered modem cards in standby. |
| Protection Features | OVP (programmable via OVP pin), short-circuit recovery, and thermal shutdown at 140°C with 15°C hysteresis - Fully integrated fault handling without external circuitry. |
Pinout & Package
Package: Pb-free, 12-pin TDFN33-12 (3.0mm × 3.0mm × 0.75mm), exposed thermal pad, rated for –40°C to +85°C ambient.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1,2 LX | Switching node | Connects to drain of internal NMOS and source of internal PMOS; ties directly to external inductor; high dv/dt node requiring tight layout. |
| 3 EN | Enable input | Logic-high active enable; threshold VEN(H) = 0.8–1.05V (typ), VEN(L) = 0.4V max; controls full shutdown with <1μA quiescent draw. |
| 4 IN | Battery input supply | Primary power input; supplies IC bias at startup before VOUT exceeds VIN; UVLO triggers at 2.1–2.3V rising. |
| 5 OVP | Over-voltage protection setpoint | External resistor divider sets trip threshold; short to GND disables OVP; reference voltage = 0.6V. |
| 6 RDY | Power-good indicator | Open-drain output pulled low when VOUT ≥ 95% of target; releases at ≤87% - provides system-level power sequencing signal. |
| 7 AGND | Analog ground reference | Separate low-noise ground for FB, ISET, OVP, and RDY; must be connected to PGND at single point near IC. |
| 8 FB | Feedback input | Monitors output via resistive divider; internal 0.6V reference enables precise VOUT programming across temperature. |
| 9 ISET | Current limit programming | Resistor to GND sets NMOS peak current limit; accuracy maintained across –40°C to +85°C. |
| 10 OUT | Boost output | High-side PMOS source terminal; connects to output capacitor bank; requires local 22μF ceramic + bulk UltraCap/SuperCap for pulse loads. |
| 11,12 PGND | Power ground return | High-current return path for LX, IN, and OUT; must be low-impedance plane tied to exposed thermal pad vias. |
Key Features
| Feature | Design Value |
|---|---|
| Synchronous boost rectification | Eliminates external Schottky diode; reduces conduction loss and improves efficiency >90% at 1A load. |
| True load disconnect | Breaks IN–OUT path during shutdown via substrate control - prevents backfeed and enables <1μA system standby current. |
| Programmable NMOS current limit | 500mA–2.5A range set by single resistor; supports scalable design for varying pulse-load profiles in modem cards. |
| Integrated compensation | No external compensation components required - simplifies layout and improves transient response stability. |
| Reverse current blocking | Prevents output-to-input backflow during shutdown or fault conditions - protects upstream battery or power rail. |
| Startup inrush current limit | Fixed 500mA PMOS linear-mode charge - avoids input rail collapse when charging large output capacitors. |
Applications
| PCI-E Modem Card (WCDMA/GPRS) | USB Modem Dongle |
|---|---|
Use Scenario: Handles 2A, 577μs GSM burst pulses while maintaining VOUT regulation within ±450mV drop on 3.8V rail. IC Role / Device Role / Timing Role: High-current boost regulator with programmable current limit and UltraCap-assisted energy buffering. Use Value: Enables reliable modem operation under high-pulse RF load without requiring oversized input power sources. |
Use Scenario: Powers 5V USB-peripheral interface from 3.3V host supply in portable dongles with strict size constraints. IC Role / Device Role / Timing Role: Compact 1.2MHz synchronous boost converter delivering regulated 5V from variable 2.4–3.6V input. Use Value: Eliminates need for discrete diode and external compensation, reducing BOM count and PCB area by >30%. |
| PCMCIA Modem Card | Industrial Cellular Module |
Use Scenario: Supplies stable 3.3V/3.8V to baseband processor during CDMA/EvDO-A continuous load currents up to 1.2A. IC Role / Device Role / Timing Role: Continuous-duty boost regulator with thermal shutdown and line/load regulation <0.5%. Use Value: Maintains processor uptime during extended data sessions without thermal derating or voltage sag. |
Use Scenario: Provides isolated 5.0V rail for LTE module RF front-end in harsh-temperature industrial gateways. IC Role / Device Role / Timing Role: Robust boost converter with –40°C to +85°C rating, OVP, and short-circuit auto-recovery. Use Value: Ensures uninterrupted cellular connectivity in uncontrolled environments where input voltage may dip or surge. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-current boost converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS61088RHLR | Higher max output current (4.5A), wider VIN (2.7–5.5V), but no true load disconnect or programmable NMOS current limit. | Requires external OVP and lacks inrush limiting - unsuitable for direct replacement in GSM pulse-load systems. | Preferred for higher-current continuous loads where input voltage ≥2.7V and load disconnect is not required. |
| MAX17062ETA+ | Lower switching frequency (600kHz), fixed 3.3V/5.0V outputs only, no adjustable current limit; includes I2C interface. | Lacks pulse-load optimization and programmable current limiting - limited flexibility for modem-specific burst profiles. | Selected when digital configuration and lower EMI are prioritized over pulse-load headroom and analog programmability. |
Compared with TPS61088RHLR and MAX17062ETA+, the AAT1219IWP-1-1.2-T1 uniquely combines programmable 500mA–2.5A current limiting, true load disconnect, and 1.2MHz operation in a 3×3mm package - making it the only option validated for WCDMA/GSM burst-mode PCMCIA and PCI-E modem cards requiring sub-1μA shutdown and robust inrush control.
Availability
AAT1219IWP-1-1.2-T1 is available at Aetrix Electronics and suitable for PCI-E modem cards, USB dongles, and industrial cellular modules requiring stable component supply, long-term lifecycle support, and guaranteed Pb-free compliance.
Supply support for AAT1219IWP-1-1.2-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 leader in analog semiconductors for wireless infrastructure, mobile devices, and IoT, specializing in RF, power management, and timing solutions with rigorous automotive and industrial qualification.
The AAT1219 product line was designed specifically for high-pulse-load modem applications in PCMCIA, PCI-E, and USB form factors - emphasizing inrush control, true load isolation, and compact 1.2MHz boost architecture.
FAQ
What is the minimum input voltage required for AAT1219IWP-1-1.2-T1 startup?
The AAT1219IWP-1-1.2-T1 has a minimum start-up voltage of 2.4V (typical), with UVLO threshold of 2.1–2.3V rising. Below this, the device remains disabled. Startup is supported down to 2.4V even when VOUT is programmed to 5.0V, provided the input source can sustain the 500mA inrush current during soft-start.
How is the output voltage set for AAT1219IWP-1-1.2-T1?
The AAT1219IWP-1-1.2-T1 uses an external resistor divider on the FB pin to set VOUT from 3.0V to 5.0V, based on a precise 0.6V internal reference. With R2 = 59kΩ (recommended for noise immunity), R1 is calculated as R1 = R2 × (VOUT/0.6 − 1); for example, 316kΩ sets 3.8V output.
Does AAT1219IWP-1-1.2-T1 support true load disconnect, and how is it implemented?
Yes, the AAT1219IWP-1-1.2-T1 implements true load disconnect by controlling the substrate bias of its internal PMOS switch to keep the parasitic body diode reverse-biased during shutdown. This breaks the IN–OUT conduction path, limiting shutdown current to <1μA and preventing backfeed - a key differentiator versus standard boost converters.
What inductor value is recommended for AAT1219IWP-1-1.2-T1, and why?
A 4.7μH shielded ferrite inductor is specified for all operating conditions of the AAT1219IWP-1-1.2-T1. This value balances ripple current, efficiency, and physical size at 1.2MHz switching frequency. Inductors must handle peak current without saturation and exhibit low DCR (e.g., Coiltronics SD53, DCR ≤45mΩ, ISAT ≥2.1A).
Can the over-voltage protection (OVP) function be disabled on AAT1219IWP-1-1.2-T1?
Yes, OVP is disabled by connecting the OVP pin directly to ground. When enabled, OVP threshold is set via an external resistor divider referenced to the same 0.6V internal reference used by FB; typical trip points range from 5.5V to 6.3V depending on resistor selection.
AAT1219IWP-1-1.2-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):
- 2.4V
- Voltage - Input (Max):
- 5.25V
- Voltage - Output (Min/Fixed):
- 3V
- Voltage - Output (Max):
- 5V
- Current - Output:
- 800mA (Switch)
- 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)
AAT1219IWP-1-1.2-T1 FAQ
1.How can I place an order for AAT1219IWP-1-1.2-T1 through Aetrix?
Please submit a Request for Quotation (RFQ) for AAT1219IWP-1-1.2-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 AAT1219IWP-1-1.2-T1 reliable?
The price and inventory of AAT1219IWP-1-1.2-T1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AAT1219IWP-1-1.2-T1 is usually 5 days.
3.What payment methods are accepted for AAT1219IWP-1-1.2-T1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AAT1219IWP-1-1.2-T1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AAT1219IWP-1-1.2-T1?
AAT1219IWP-1-1.2-T1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AAT1219IWP-1-1.2-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 AAT1219IWP-1-1.2-T1?
For technical support, including AAT1219IWP-1-1.2-T1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AAT1219IWP-1-1.2-T1 requirements.
6.How does Aetrix verify that AAT1219IWP-1-1.2-T1 is sourced from the original manufacturer or authorized distributors?
All AAT1219IWP-1-1.2-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 AAT1219IWP-1-1.2-T1 meets industry standards.
7.What is the process for return or replacement of AAT1219IWP-1-1.2-T1?
All AAT1219IWP-1-1.2-T1 units undergo pre-shipment inspection (PSI). If there is an issue with AAT1219IWP-1-1.2-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 AAT1219IWP-1-1.2-T1 part is unused and in its original packaging.
Return procedure for AAT1219IWP-1-1.2-T1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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