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Microchip Technology UCS81003AM-C1A-V03
- Part No.:
- UCS81003AM-C1A-V03
- Manufacturer:
- Microchip Technology
- Category:
- Power Management - Specialized
- Package:
- 28-VFQFN Exposed Pad
- Datasheet:
-
UCS81003AM-C1A-V03.pdf
- Description:
- USB PORT POWER CONTROLLER
- Quantity:
- Payment:
- Shipping:
Inventory:3,288
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Product details
Overview
UCS81003AM-C1A-V03 from Microchip Technology is a USB port power switch and intelligent charger emulator IC for automotive and industrial USB host ports. It delivers up to 3.0A continuous current (2.85A typical) with 55 mΩ on-resistance, programmable current limiting (570 mA to 3.0 A), dynamic thermal management, and USB-IF BC1.2/CDP/DCP/YD/T-1591/Apple/RIM charging profile emulation - deployed in rear-seat entertainment systems and auxiliary charging boxes.
For engineers reviewing the UCS81003AM-C1A-V03 datasheet, UCS81003AM-C1A-V03 pinout, UCS81003AM-C1A-V03 application, or UCS81003AM-C1A-V03 equivalent, this device supports SMBus/I²C-controlled charger handshaking, high-speed USB 2.0 data pass-through, attach detection from sleep, and split-supply operation for battery-powered standby - critical for automotive infotainment and portable device charging system design.
Technical Context
The UCS81003AM-C1A-V03 integrates a low-RON power switch, a USB 2.0 high-speed data switch (1100 MHz -3 dB bandwidth), and a fully programmable charger emulation engine. Its dual-mode current limiting (trip or constant-current) operates across 2.9V–5.5V VS supply, with thermal regulation at 110°C and shutdown at 135°C.
It implements attach/removal detection via A_DET# with 800 µA threshold and 100 ms response, supports BC1.2 VBUS discharge for renegotiation, and enables wake-on-attach from ultra-low-power sleep (5 µA typical). The device uses SMBus 2.0 (up to 400 kHz) with block read/write and multiple address support for host coordination.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Max Continuous Current | 3.0 A (2.85 A typical); enables full 12W USB charging without external current-sense amplifiers |
| Power Switch RON | 55 mΩ (typical at 5V); minimizes voltage drop and thermal dissipation under 3A load |
| Operating Temp Range | −40°C to +85°C; qualified for automotive cabin and industrial embedded environments |
| Data Switch Bandwidth | 1100 MHz (−3 dB); preserves USB 2.0 HS signal integrity with <200 ps total jitter at 480 Mbps |
| SMBus Interface | I²C-compatible, 10–400 kHz; supports multi-address configuration and block transfers for fast profile updates |
| Current Limit Programmability | 8 discrete settings (570 mA to 3.0 A) via ILIM resistor; enables precise power allocation per port |
| ESD Immunity | IEC61000-4-2 ±8 kV contact / ±15 kV air; protects against real-world USB connector ESD events |
Pinout & Package
The UCS81003AM-C1A-V03 is housed in a thermally enhanced 5 mm × 5 mm, 28-pin VQFN package with exposed thermal pad (EP-29) for efficient heat dissipation in high-current applications.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VS1/VS2/VS3 | Power switch input supply | Accepts 2.9–5.5 V source; supports split-supply configuration with VDD for low-power detect mode |
| VBUS/VBUS2/VBUS3 | USB output power rail | Delivers regulated switched power to downstream device; includes back-drive/back-voltage protection |
| PWR_EN | Power switch enable control | Selectable active-high/active-low logic; initiates soft turn-on and controls fault recovery timing |
| A_DET# | Attach detection interrupt | Open-drain flag asserting on valid USB attachment; enables wake-from-sleep in battery-operated systems |
| EM_EN, M1, M2 | Charger emulation mode control | Configures DCP/CDP/SDP behavior and selects among nine preloaded or one custom profile |
| SMDATA/LATCH, SMCLK/S0 | SMBus/I²C interface | Supports bidirectional communication for real-time current monitoring, profile selection, and status reporting |
| DPOUT/DMOUT, DPIN/DMIN | USB 2.0 high-speed data path | Bi-directional 480 Mbps data switch with <2 Ω on-resistance and −30 dB off-isolation at 240 MHz |
| ALERT# | Fault reporting output | Open-drain alert signaling overcurrent, thermal violation, UV/OV lockout, or short-circuit events |
Key Features
| Feature | Design Value |
|---|---|
| Programmable current limit | Eight factory-calibrated settings (570 mA–3.0 A) via external resistor; eliminates need for trimming or calibration in production |
| Dynamic thermal management | Reduces current limit at 110°C die temperature with 10°C hysteresis; prevents thermal runaway without full shutdown |
| USB charger emulation flexibility | Nine preloaded BC1.2/YD/T-1591/Apple/RIM profiles + one user-programmable profile; ensures compatibility across legacy and emerging devices |
| Ultra-low-power detect mode | 5 µA typical supply current with attach detection enabled; extends battery life in always-on automotive USB ports |
| Back-drive and back-voltage protection | Blocks reverse current flow from VBUS into VS when VBUS > VS by >150 mV; prevents damage during hot-plug or cable faults |
Applications
| Rear-Seat Entertainment Charging | Automotive Auxiliary Power Socket Replacement |
|---|---|
|
Use Scenario: In-vehicle rear-seat USB ports powering tablets, headphones, and mobile devices during travel. IC Role / Device Role / Timing Role: USB port controller managing power delivery, data pass-through, and charger signature negotiation per connected device. Use Value: Enables simultaneous 12W charging and USB 2.0 HS data transfer while maintaining compliance with automotive thermal and ESD requirements. |
Use Scenario: Replacing mechanical 12V cigarette-lighter sockets with smart USB-A ports in center consoles and cargo areas. IC Role / Device Role / Timing Role: Primary power switch and safety monitor, enforcing overcurrent, thermal, and undervoltage lockout before enabling VBUS. Use Value: Eliminates fuse-based protection; provides programmable current limits, fault logging via SMBus, and auto-recovery without manual reset. |
| Consumer Device Charging Port | Industrial Portable Equipment Docking Station |
|
Use Scenario: USB charging hub integrated into smart home gateways or set-top boxes for IoT peripherals. IC Role / Device Role / Timing Role: Intelligent charge manager detecting device type (SDP/CDP/DCP) and applying optimal voltage/current signature. Use Value: Achieves full 5V/2.85A charging for Apple and Android devices without host CPU intervention or firmware updates. |
Use Scenario: Field-deployable docking station for ruggedized tablets and handheld scanners used in logistics and warehousing. IC Role / Device Role / Timing Role: Power arbitration unit that monitors bus current, enforces charge rationing across multiple ports, and reports usage via SMBus. Use Value: Prevents battery drain during idle docked state using 5 µA sleep current and wake-on-attach, while supporting 3A peak loads during active use. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar USB port power control and charger emulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TUSB211IRWBR | Single-channel USB 2.0 repeater only; no power switching, current limiting, or charger emulation | Limited to signal integrity restoration; cannot replace UCS81003AM-C1A-V03 in charging or power control roles | Select only if system already has discrete power switch and charger ID circuitry; not a functional substitute |
| TPS65987D | USB-C PD controller with integrated buck-boost; supports USB PD 3.0 but lacks BC1.2/DCP emulation and VQFN-28 footprint | Targets USB-C ecosystems; requires redesign for legacy USB-A ports and does not support YD/T-1591 or Apple 1A/2.1A signatures | Choose for new USB-C designs requiring programmable PD contracts; not suitable for backward-compatible USB-A charging ports |
Compared with TUSB211IRWBR and TPS65987D, the UCS81003AM-C1A-V03 uniquely combines USB-A power switching, BC1.2-compliant charger emulation, and high-speed data pass-through in a single 5×5 mm VQFN - making it the only drop-in solution for retrofitting legacy automotive USB-A ports with intelligent charging and robust protection.
Availability
UCS81003AM-C1A-V03 is available at Aetrix Electronics and suitable for automotive infotainment systems, industrial docking stations, and consumer USB charging hubs requiring stable component supply, long-lifecycle support, and AEC-Q200-aligned reliability.
Supply support for UCS81003AM-C1A-V03 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
Microchip Technology Inc. is a leading provider of microcontrollers, analog components, and USB interface solutions, serving automotive, industrial, and consumer markets with high-reliability silicon and comprehensive design support.
The UCS81003AM-C1A-V03 belongs to Microchip's USB power management and charger emulation product line, engineered specifically for automotive-grade USB host ports needing robust overcurrent protection, wide-temperature operation, and universal device compatibility.
FAQ
What is the maximum continuous current rating of the UCS81003AM-C1A-V03?
The UCS81003AM-C1A-V03 supports up to 3.0 A continuous current with a typical value of 2.85 A at 5 V input. This rating is sustained under thermal regulation conditions and assumes proper PCB thermal design with the exposed pad connected to a thermal plane. The device enters current-limiting mode before reaching unsafe junction temperatures, ensuring safe operation in automotive and industrial environments where the UCS81003AM-C1A-V03 is commonly deployed.
Does the UCS81003AM-C1A-V03 support USB 2.0 high-speed data pass-through?
Yes, the UCS81003AM-C1A-V03 integrates a fully compliant USB 2.0 high-speed data switch with a −3 dB bandwidth of 1100 MHz, propagation delay skew under 25 ps, and total jitter of 200 ps at 480 Mbps. It supports SDP, CDP, and data pass-through modes while maintaining signal integrity - verified by USB-IF eye diagram testing shown in the official datasheet for UCS81003AM-C1A-V03.
How does the UCS81003AM-C1A-V03 handle overcurrent and thermal faults?
The UCS81003AM-C1A-V03 implements dual-stage protection: immediate short-circuit response (<1.5 µs) followed by latch or auto-recovery fault handling. Thermal regulation reduces current limit at 110°C (10°C hysteresis), and thermal shutdown disables the switch at 135°C (35°C hysteresis). These behaviors are hardware-enforced and do not require firmware intervention - a core safety feature of the UCS81003AM-C1A-V03.
Can the UCS81003AM-C1A-V03 emulate Apple and Chinese YD/T-1591 charging protocols?
Yes, the UCS81003AM-C1A-V03 includes nine preloaded charger emulation profiles covering USB-IF BC1.2 CDP/DCP, YD/T-1591-2009, and major Apple and RIM handshake variants. It also supports one custom-programmable profile via SMBus for proprietary or future device signatures - confirmed in the UCS81003AM-C1A-V03 datasheet section "Selectable/Automatic Cycling of Universal Serial Bus (USB) Data Line Charger Emulation Profiles".
What is the supply current of the UCS81003AM-C1A-V03 in sleep mode?
The UCS81003AM-C1A-V03 draws just 5 µA typical supply current (IDD_SLEEP + IVS_SLEEP) in ultra-low-power sleep mode while retaining attach detection capability via the A_DET# pin. This allows battery-backed systems - such as automotive infotainment head units - to remain responsive to USB device insertion without significant standby drain, a key specification validated in Table 1-2 of the UCS81003AM-C1A-V03 datasheet.
UCS81003AM-C1A-V03 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 28-VFQFN Exposed Pad
- Packaging:
- Tray
- Product Status:
- Active
- Applications:
- USB Dedicated Charging Port (DCP), Power Switch
- Current - Supply:
- 650µA
- Voltage - Supply:
- 4.5V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 28-VQFN (5x5)
UCS81003AM-C1A-V03 FAQ
1.How can I place an order for UCS81003AM-C1A-V03 through Aetrix?
Please submit a Request for Quotation (RFQ) for UCS81003AM-C1A-V03 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 UCS81003AM-C1A-V03 reliable?
The price and inventory of UCS81003AM-C1A-V03 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for UCS81003AM-C1A-V03 is usually 5 days.
3.What payment methods are accepted for UCS81003AM-C1A-V03?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for UCS81003AM-C1A-V03 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for UCS81003AM-C1A-V03?
UCS81003AM-C1A-V03 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your UCS81003AM-C1A-V03 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 UCS81003AM-C1A-V03?
For technical support, including UCS81003AM-C1A-V03 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your UCS81003AM-C1A-V03 requirements.
6.How does Aetrix verify that UCS81003AM-C1A-V03 is sourced from the original manufacturer or authorized distributors?
All UCS81003AM-C1A-V03 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 UCS81003AM-C1A-V03 meets industry standards.
7.What is the process for return or replacement of UCS81003AM-C1A-V03?
All UCS81003AM-C1A-V03 units undergo pre-shipment inspection (PSI). If there is an issue with UCS81003AM-C1A-V03, 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 UCS81003AM-C1A-V03 part is unused and in its original packaging.
Return procedure for UCS81003AM-C1A-V03:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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