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Microchip Technology UCS1003-1-BP
- Part No.:
- UCS1003-1-BP
- Manufacturer:
- Microchip Technology
- Category:
- Power Management - Specialized
- Package:
- 20-VFQFN Exposed Pad
- Datasheet:
-
UCS1003-1-BP.pdf
- Description:
- IC USB PORT POWER CTRLR 20QFN
- Quantity:
- Payment:
- Shipping:
Inventory:679
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Product details
Overview
UCS1003-1-BP from Microchip Technology is a USB port power controller with integrated charger emulation and programmable current monitoring. It delivers up to 3.0A continuous current (2.85A typical) with 55 mΩ on-resistance, supports SMBus 2.0/I²C configuration, and enables wake-on-attach detection in low-power states for battery-powered systems.
For engineers reviewing the UCS1003-1-BP datasheet, UCS1003-1-BP pinout, UCS1003-1-BP application, or UCS1003-1-BP equivalent, this device serves as a fully managed USB power switch for notebook docking stations, AC-DC adapters, and embedded host systems requiring BC1.2/CDP/DCP charging compliance, real-time current rationing, and thermal-aware fault handling.
Technical Context
The UCS1003-1-BP integrates a high-side power switch, USB 2.0 high-speed data pass-through switch, and intelligent charger emulator supporting nine preloaded profiles plus one custom SMBus-programmable profile. Its dual-mode current limiting-overcurrent trip or constant-current-operates across 2.9V–5.5V source voltage with dynamic thermal regulation at 110°C and shutdown at 135°C.
It implements attach detection via A_DET# open-drain output, supports split VS/VDD supply for standby power optimization, and provides real-time current measurement (±2% accuracy above 180 mA) with 11.72 mA LSB resolution and programmable update timing (200–1600 ms). All control logic, including EM_EN, PWR_EN, and ALERT#, is synchronized to internal state machines with defined timing windows for fault recovery and discharge.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Max Continuous Current | 3.0A (2.85A typical); enables full USB BC1.2 12W charging without external FETs |
| Power Switch RON | 55 mΩ typical at 4.75–5.25V; minimizes conduction loss and self-heating under load |
| Current Measurement Accuracy | ±2% (180 mA–ILIM range); supports precise charge rationing and battery life estimation |
| SMBus/I²C Interface | Up to 400 kHz clock; enables runtime reconfiguration of ILIM, charger profiles, and timing parameters |
| Operating Temperature | –40°C to +85°C ambient; validated for industrial-grade notebook and docking station environments |
| Package Thermal Resistance | θJA = 41°C/W (High-K board); ensures reliable operation at full 3A load with standard PCB layout |
| USB Data Switch Bandwidth | 1100 MHz –3 dB BW; preserves USB 2.0 HS signal integrity with <200 ps total jitter at 480 Mbps |
Pinout & Package
UCS1003-1-BP is housed in a 4 mm × 4 mm, 20-pin QFN package with exposed thermal pad (EP) for enhanced thermal dissipation. The package supports reflow soldering per JEDEC J-STD-020 and is RoHS-compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 20, EP | GND / Exposed Pad | Primary thermal and electrical ground reference; must be connected to PCB ground plane via ≥9 thermal vias |
| 2 (DMOUT), 4 (DMIN), 17 (DPOUT), 18 (DPIN) | USB 2.0 Data Path | High-speed differential I/O; supports data pass-through in SDP/CDP modes and charger signature injection |
| 3 (VBUS1), 5 (VBUS2) | USB VBUS Output | Switched 5V output to downstream port; rated for 3A continuous with backdrive/back-voltage protection |
| 6 (VS1), 7 (VS2) | Power Switch Input | Input source for port power switch; accepts 2.9–5.5V; enables split-supply operation with VDD |
| 8 (VDD) | Digital Core Supply | 4.5–5.5V logic supply; powers SMBus interface, state machine, and charger emulator logic |
| 9 (SMCLK/S0), 10 (SMDATA/LATCH) | SMBus/I²C Interface | Configurable bidirectional bus pins; support block read/write and multiple slave addresses |
| 11 (ALERT#), 15 (A_DET#) | Open-Drain Status Outputs | Active-low interrupt outputs: ALERT# signals fault events; A_DET# asserts on peripheral attachment |
| 12 (EM_EN), 13 (SEL), 14 (M1/M2) | Charger Emulation Control | Hardware-selectable or SMBus-controlled mode selection for BC1.2/DCP/YD/T-1591/Apple/Samsung profiles |
| 16 (COMM_SEL/ILIM), 19 (PWR_EN) | Configuration & Enable | ILIM resistor select or SMBus address config; PWR_EN controls power switch on/off with soft turn-on |
Key Features
| Feature | Design Value |
|---|---|
| Programmable Current Limit | 8 discrete ILIM settings (570 mA–3.0 A) via SMBus or external resistor; enables adaptive power allocation per port |
| Custom Charger Emulation | One user-defined SMBus-programmable profile; supports proprietary or emerging portable device handshaking requirements |
| Wake-on-Attach Detection | A_DET# assertion within 100 ms of device connection; allows host system to wake from sleep/standby without VBUS power |
| Dynamic Thermal Management | Thermal regulation begins at 110°C (10°C hysteresis); prevents thermal runaway while maintaining partial functionality |
| VBUS Discharge Control | Programmable 100–400 ms discharge time via 100 Ω internal resistor; meets USB specification for safe port reset |
| USB 2.0 HS Data Integrity | –30 dB off-isolation at 240 MHz and –40 dB DP–DM crosstalk; ensures robust data transmission during charging |
Applications
| Notebook Docking Stations | AC-DC Wall Adapters |
|---|---|
|
Use Scenario: A laptop dock provides USB-A ports with fast charging and data sync for peripherals. IC Role / Device Role / Timing Role: UCS1003-1-BP acts as the primary USB power controller, managing VBUS delivery, charger signature, and data path switching. Use Value: Enables simultaneous 12W charging and USB 2.0 HS data transfer without signal degradation or thermal throttling. |
Use Scenario: An OEM wall adapter must support multiple legacy and modern smartphones with varying charging protocols. IC Role / Device Role / Timing Role: UCS1003-1-BP emulates BC1.2 CDP/DCP, Apple, Samsung, and YD/T-1591 signatures via hardware or SMBus. Use Value: Achieves >95% peripheral compatibility out-of-box using nine preloaded profiles and one field-upgradable custom profile. |
| Battery-Powered Embedded Hosts | Industrial Monitors with USB Hub |
|
Use Scenario: A portable medical tablet remains in deep sleep but must detect and charge attached peripherals upon insertion. IC Role / Device Role / Timing Role: UCS1003-1-BP performs low-power attach detection (5 µA sleep current) and wakes host via A_DET#. Use Value: Extends battery life by eliminating always-on VBUS while enabling instant response to peripheral connection. |
Use Scenario: A factory-floor monitor integrates USB hub functionality with strict thermal and safety certifications. IC Role / Device Role / Timing Role: UCS1003-1-BP provides UL-recognized overcurrent protection, UVLO/OVLO, and IEC61000-4-2 ESD immunity. Use Value: Meets EN/IEC 60950-1 CB certification requirements and sustains 3A load continuously in 85°C ambient. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar USB port power control applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TUSB211IRWBR | USB 2.0 redriver only; no power switching, no charger emulation, no current monitoring | Used solely for signal integrity restoration-not for power management or charging | Select when only HS signal boost is needed; not a functional substitute for UCS1003-1-BP |
| TPS2546RTER | Integrated USB charger detector and 3A power switch; supports BC1.2 only; no SMBus programmability or custom profile | Limited to fixed-profile charging; lacks current monitoring, wake-on-attach, and thermal regulation features | Choose for cost-sensitive BC1.2-only designs where firmware configurability and advanced power rationing are unnecessary |
Compared with TUSB211IRWBR and TPS2546RTER, the UCS1003-1-BP uniquely combines programmable current limiting, nine+1 charger profiles, real-time current measurement, and wake-on-attach in a single 4×4 mm QFN-enabling feature-rich, future-proof USB power management without external components or firmware overhead.
Availability
UCS1003-1-BP is available at Aetrix Electronics and suitable for notebook docking stations, AC-DC wall adapters, and industrial monitors requiring stable component supply, long-term lifecycle support, and certified USB power control functionality.
Supply support for UCS1003-1-BP 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, FPGA, and connectivity solutions, serving automotive, industrial, consumer, and communications markets with vertically integrated silicon and software.
The UCS1003-1-BP belongs to Microchip's USB Power Delivery and Charging portfolio, designed specifically for host-side USB port intelligence-delivering secure, standards-compliant, thermally robust power switching and charger emulation in space-constrained embedded systems.
FAQ
What is the maximum continuous current rating of the UCS1003-1-BP?
The UCS1003-1-BP supports up to 3.0A continuous current with a typical on-resistance of 55 mΩ. This rating is validated across the full operating temperature range (–40°C to +85°C) and enables full 12W USB BC1.2 charging without external FETs or heatsinking in standard PCB layouts.
Does the UCS1003-1-BP support custom USB charger emulation profiles?
Yes, the UCS1003-1-BP includes one fully programmable charger emulation profile accessible via its SMBus 2.0/I²C interface. This allows engineers to define custom D+/D– impedance signatures and timing sequences to support proprietary or newly released portable devices beyond the nine preloaded BC1.2/YD/T-1591/Apple/Samsung profiles.
How does the UCS1003-1-BP handle thermal overload conditions?
The UCS1003-1-BP implements dual-stage thermal protection: dynamic regulation begins at 110°C (with 10°C hysteresis) to reduce current limit gradually, and hard thermal shutdown occurs at 135°C (35°C hysteresis). Both thresholds are die-temperature measured and ensure safe operation under sustained overload or poor PCB thermal design.
Can the UCS1003-1-BP operate with separate VS and VDD supplies?
Yes, the UCS1003-1-BP supports split-supply operation where VS (power switch input) and VDD (logic supply) are independently powered. This enables ultra-low-power attach detection (<15 µA sleep current) while keeping VDD active for wake signaling-ideal for battery-powered hosts that must detect peripherals in OFF or deep-sleep states.
What is the accuracy and resolution of current measurement in the UCS1003-1-BP?
The UCS1003-1-BP provides current measurement with ±2% accuracy for loads above 180 mA and ±2 LSB accuracy below that threshold. Its 12-bit ADC delivers 11.72 mA per LSB resolution across a 0–2988.6 mA full-scale range, enabling precise charge rationing and battery life modeling in real time.
UCS1003-1-BP Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 20-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 ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-QFN (4x4)
UCS1003-1-BP FAQ
1.How can I place an order for UCS1003-1-BP through Aetrix?
Please submit a Request for Quotation (RFQ) for UCS1003-1-BP 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 UCS1003-1-BP reliable?
The price and inventory of UCS1003-1-BP are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for UCS1003-1-BP is usually 5 days.
3.What payment methods are accepted for UCS1003-1-BP?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for UCS1003-1-BP transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for UCS1003-1-BP?
UCS1003-1-BP orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your UCS1003-1-BP 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 UCS1003-1-BP?
For technical support, including UCS1003-1-BP datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your UCS1003-1-BP requirements.
6.How does Aetrix verify that UCS1003-1-BP is sourced from the original manufacturer or authorized distributors?
All UCS1003-1-BP 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 UCS1003-1-BP meets industry standards.
7.What is the process for return or replacement of UCS1003-1-BP?
All UCS1003-1-BP units undergo pre-shipment inspection (PSI). If there is an issue with UCS1003-1-BP, 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 UCS1003-1-BP part is unused and in its original packaging.
Return procedure for UCS1003-1-BP:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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