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Microchip Technology UCS1003-2-BP
- Part No.:
- UCS1003-2-BP
- Manufacturer:
- Microchip Technology
- Category:
- Power Management - Specialized
- Package:
- 20-VFQFN Exposed Pad
- Datasheet:
-
UCS1003-2-BP.pdf
- Description:
- IC USB PORT POWER CTRLR 20QFN
- Quantity:
- Payment:
- Shipping:
Inventory:490
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Product details
Overview
UCS1003-2-BP from Microchip Technology is a USB port power controller with integrated charger emulation and 3.0A current-limiting power switch, featuring 55 mΩ on-resistance, BC1.2/CDP/DCP/YD/T-1591/Apple/Samsung/RIM protocol support, and CHRG# open-drain active indication for charging status in notebook docking stations.
For engineers reviewing the UCS1003-2-BP datasheet, UCS1003-2-BP pinout, UCS1003-2-BP application, or UCS1003-2-BP equivalent, key selection criteria include its fixed 175.8 mA charging current threshold, absence of SMBus/I²C interface, presence of CHRG# (not A_DET#), thermal shutdown at 135°C, and 4×4 mm 20-pin QFN package with exposed thermal pad.
Technical Context
The UCS1003-2-BP implements dual-mode overcurrent protection-trip or constant-current limiting-with dynamic thermal regulation that reduces current limit at 110°C and shuts down at 135°C. Its USB data path includes a high-speed (480 Mbps) compliant 2Ω on-resistance data switch with 1100 MHz -3 dB bandwidth and <200 ps total jitter.
It supports nine preloaded USB charger emulation profiles-including USB-IF BC1.2 CDP/DCP, YD/T-1591, Apple, Samsung, and RIM-and uses resistor-programmable current limits (570 mA to 3.0 A typical) via ILIM pin. Unlike UCS1003-1, it lacks SMBus, current monitoring, and programmable emulation; unlike UCS1003-3, it omits A_DET# and provides CHRG# instead.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Max Continuous Current | 3.0A (2.85A typical); enables full 12W USB charging without external FETs |
| Power Switch RON | 55 mΩ; minimizes voltage drop and power loss at 3A load |
| Charging Threshold | 175.8 mA typical; triggers CHRG# assertion when peripheral draws ≥175.8 mA |
| Thermal Shutdown | 135°C; disables VBUS output to prevent die damage during sustained overload |
| Package | 4 mm × 4 mm 20-pin QFN with exposed thermal pad; supports ≤729 mW power dissipation at +85°C ambient (High-K board) |
| Operating Temp | -40°C to +85°C; qualified for industrial-grade embedded host systems |
| VBUS Discharge | 100 Ω internal discharge impedance; ensures rapid VBUS ramp-down after disconnect per BC1.2 renegotiation |
Pinout & Package
UCS1003-2-BP is housed in a 4 mm × 4 mm, 20-pin QFN package with exposed thermal pad (EP) for enhanced thermal performance. Pin functions are validated per Microchip DS20005346B-page 2 (UCS1003-2 variant diagram).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 20, 19, 18, 17, 14, 13, 12, 11, 6, 7, 8, 9, 10, 15, 16 | GND / EP | Ground reference and thermal conduction path; all GND pins and EP must be connected to PCB ground plane |
| 2, 15 | DMOUT / DPOUT | USB 2.0 data line outputs; routed to downstream device DP/DM; enable data pass-through in SDP/CDP modes |
| 3, 4 | VBUS1 / VBUS2 | Input power rails; accept 2.9–5.5V source; internally fused and monitored for OVLO/UVLO |
| 5, 14 | DMIN / DPIN | USB 2.0 data line inputs; connect to upstream host DP/DM; isolated when charger emulation active |
| 11 | VDD | Logic supply (4.5–5.5V); powers internal logic, I/O, and data switch; separate from VS for split-supply standby |
| 12 | VS1 / VS2 | Power switch supply (2.9–5.5V); directly drives VBUS output; enables low-drop operation independent of VDD |
| 13 | CHRG# | Open-drain active-low charging indicator; pulled low when ≥175.8 mA drawn; requires external pull-up |
| 16 | PWR_EN | Active-high port enable; controls VBUS turn-on/off; supports latch or auto-recovery fault handling |
| 10 | ILIM | Current limit selection input; sets 8 discrete thresholds (570 mA–3.0 A) via resistor-to-VDD or grounded |
| 17 | SEL | Charger profile select; chooses among 9 preloaded emulation modes (BC1.2, Apple, Samsung, etc.) |
| 18 | EM_EN | Emulation enable; activates charger signature generation on DP/DM lines when asserted |
| 19 | ALERT# | Open-drain fault indicator; asserts low on overcurrent, thermal shutdown, or UVLO/OVLO |
Key Features
| Feature | Design Value |
|---|---|
| USB-IF BC1.2 Compliance | Supports Charging Downstream Port (CDP) and Dedicated Charging Port (DCP) handshaking with guaranteed 12W emulation |
| Multi-Standard Charger Emulation | Preloads YD/T-1591, Apple (2.1A/2.4A), Samsung, and RIM signatures-no firmware update required |
| Dynamic Thermal Management | Reduces current limit at 110°C (10°C hysteresis) and shuts off at 135°C (35°C hysteresis) to protect silicon and system |
| Backdrive & Back-Voltage Protection | Blocks reverse current flow from VBUS into VS/VDD; prevents battery drain or rail collapse when host is off |
| Soft Turn-On Control | 100 mA/µs slew rate limits inrush current during VBUS ramp-up, reducing stress on input capacitors and connectors |
| VBUS Discharge Function | 100 Ω internal discharge path ensures VBUS drops below 0.8V within 200 ms after disconnect-enabling BC1.2 renegotiation |
Applications
| USB Docking Station Power Management | Notebook AC Adapter Interface |
|---|---|
Use Scenario: A laptop dock with multiple USB-A ports delivers up to 3A per port while detecting and negotiating charge protocols for attached smartphones and tablets. IC Role / Device Role / Timing Role: UCS1003-2-BP acts as the primary port power switch and charger emulator, controlling VBUS delivery and asserting CHRG# to signal active charging to the host MCU. Use Value: Eliminates need for discrete charge detection ICs and external current-sense amplifiers; reduces BOM count by integrating 9 charger profiles and 55 mΩ switching FET. | Use Scenario: An AC-DC wall adapter with USB-A output must comply with BC1.2 DCP requirements and provide stable 5V/3A output under varying load and temperature conditions. IC Role / Device Role / Timing Role: UCS1003-2-BP serves as the final-stage power controller, enforcing overcurrent limits, managing thermal derating, and discharging VBUS post-disconnect to meet BC1.2 renegotiation timing. Use Value: Enables UL/EN/IEC 60950-1 certification with built-in OVLO/UVLO, backdrive protection, and 8/15 kV ESD immunity-reducing safety compliance effort. |
| Monitor USB Hub with Fast Charging | Industrial Tablet Docking Cradle |
Use Scenario: A desktop monitor with integrated USB hub supplies power to peripherals while supporting fast-charging for mobile devices plugged into its downstream ports. IC Role / Device Role / Timing Role: UCS1003-2-BP manages individual port power, detects attachment via VBUS current, and signals CHRG# to the monitor's system controller for UI feedback. Use Value: Provides deterministic 175.8 mA charging threshold and 25 ms auto-recovery cycle time-ensuring reliable charge detection across diverse mobile OEMs. | Use Scenario: A ruggedized tablet cradle in factory automation must deliver 3A USB power while surviving wide temperature swings (-40°C to +85°C) and electrostatic events. IC Role / Device Role / Timing Role: UCS1003-2-BP operates as the robust front-end power gate, using its 55 mΩ RON, 135°C thermal shutdown, and IEC61000-4-2 ±15 kV ESD protection to ensure field reliability. Use Value: Delivers certified industrial-grade operation without external thermal sensors or protection ICs-lowering design risk and qualification time. |
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 |
|---|---|---|---|
| TUSB2036IRHBR | No integrated power switch or charger emulation; USB 2.0 hub only; requires external power management IC | Used in multi-port hubs where power control is handled separately; not suitable for single-port BC1.2-compliant designs | Select only if system already includes discrete power switch and charger ID logic |
| TPS2546RTER | Integrated USB 2.0 data switch and BC1.2 DCP/CDP emulation; 2.5A max current; no CHRG# pin; uses different pinout and I²C configuration | Targets compact AC adapters and portable chargers; lacks A_DET#/CHRG# status signaling for host MCU integration | Choose when SMBus configurability and smaller footprint outweigh need for CHRG# status flag |
Compared with TUSB2036IRHBR and TPS2546RTER, UCS1003-2-BP uniquely combines 3.0A power switching, nine preloaded charger profiles, and dedicated CHRG# signaling in a single 4×4 mm QFN-making it optimal for host-controlled docking solutions requiring minimal external components and deterministic charge indication.
Availability
UCS1003-2-BP is available at Aetrix Electronics and suitable for notebook docking stations, AC-DC wall adapters, and industrial tablet cradles requiring stable component supply, long-term lifecycle support, and full BC1.2 compliance out-of-box.
Supply support for UCS1003-2-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 high-reliability silicon and development tools.
The UCS1003 family was designed specifically for USB host-side power control and intelligent charger emulation in space-constrained embedded systems-enabling rapid adoption of BC1.2 and regional fast-charge standards without firmware development.
FAQ
What is the function of the CHRG# pin on the UCS1003-2-BP?
The CHRG# pin on the UCS1003-2-BP is an open-drain, active-low indicator that asserts when the connected peripheral draws ≥175.8 mA from VBUS. It remains low throughout active charging and releases only after current falls below threshold for >100 ms. This signal allows the host system to drive LED indicators or trigger software charge-state logic without polling registers-critical for the UCS1003-2-BP since it lacks SMBus interface.
Does the UCS1003-2-BP support USB 2.0 high-speed data pass-through?
Yes, the UCS1003-2-BP integrates a fully compliant USB 2.0 high-speed (480 Mbps) data switch with 2 Ω on-resistance, 1100 MHz -3 dB bandwidth, and <200 ps total jitter. It enables transparent data routing in Standard Downstream Port (SDP) and Charging Downstream Port (CDP) modes while isolating DP/DM during DCP emulation-ensuring full functionality of the UCS1003-2-BP in both charging and data-transfer scenarios.
How does the UCS1003-2-BP implement overcurrent protection?
The UCS1003-2-BP provides dual-mode overcurrent protection: trip mode (disconnects VBUS within 6 ms of short detection) and constant-current limiting (regulates output at selected ILIM threshold). Short-circuit response occurs in 1.5 µs, and thermal regulation begins at 110°C with 10°C hysteresis. These features are hardwired-no configuration required-making the UCS1003-2-BP ideal for safety-critical USB power delivery where predictable fault behavior is mandatory.
Can the UCS1003-2-BP be used in split-supply configurations?
Yes, the UCS1003-2-BP supports split-supply operation with independent VDD (4.5–5.5V) and VS (2.9–5.5V) rails. This allows the logic circuitry to remain powered while VS is gated during system standby-enabling ultra-low-power attach detection. However, VS must not exceed VDD + 150 mV per datasheet specification, and the UCS1003-2-BP does not include A_DET#; CHRG# serves as the sole status pin for charging activity.
What charger emulation protocols are supported by the UCS1003-2-BP?
The UCS1003-2-BP supports nine preloaded USB charger emulation profiles: USB-IF BC1.2 Charging Downstream Port (CDP) and Dedicated Charging Port (DCP), Chinese standard YD/T-1591-2009, and proprietary signatures for Apple (iPhone/iPad), Samsung, and RIM devices. These are fixed in mask ROM-no programming or SMBus access required-ensuring immediate interoperability with legacy and mainstream peripherals without firmware updates or host intervention.
UCS1003-2-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)
UCS1003-2-BP FAQ
1.How can I place an order for UCS1003-2-BP through Aetrix?
Please submit a Request for Quotation (RFQ) for UCS1003-2-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 UCS1003-2-BP reliable?
The price and inventory of UCS1003-2-BP are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for UCS1003-2-BP is usually 5 days.
3.What payment methods are accepted for UCS1003-2-BP?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for UCS1003-2-BP transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for UCS1003-2-BP?
UCS1003-2-BP orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your UCS1003-2-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 UCS1003-2-BP?
For technical support, including UCS1003-2-BP datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your UCS1003-2-BP requirements.
6.How does Aetrix verify that UCS1003-2-BP is sourced from the original manufacturer or authorized distributors?
All UCS1003-2-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 UCS1003-2-BP meets industry standards.
7.What is the process for return or replacement of UCS1003-2-BP?
All UCS1003-2-BP units undergo pre-shipment inspection (PSI). If there is an issue with UCS1003-2-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 UCS1003-2-BP part is unused and in its original packaging.
Return procedure for UCS1003-2-BP:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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