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Microchip Technology UCS1001-3-BP
- Part No.:
- UCS1001-3-BP
- Manufacturer:
- Microchip Technology
- Category:
- Power Management - Specialized
- Package:
- 20-VFQFN Exposed Pad
- Datasheet:
-
UCS1001-3-BP.pdf
- Description:
- IC USB PORT POWER CTRLR 20QFN
- Quantity:
- Payment:
- Shipping:
Inventory:718
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Product details
Overview
UCS1001-3-BP from SMSC is a USB port power controller with integrated charger emulation, designed for host-side USB charging management in portable device docking and adapter applications. It delivers up to 2.5 A continuous current with 55 mΩ on-resistance, supports BC1.2 CDP/DCP, Apple®, and YD/T-1591 protocols, and features a dedicated open-drain CHRG# output indicating active charging state.
For engineers reviewing the UCS1001-3-BP datasheet, UCS1001-3-BP pinout, UCS1001-3-BP application, or UCS1001-3-BP equivalent, this device is selected for precise USB power switching, multi-profile charger emulation, thermal-aware current limiting, and system wake-on-attach capability in battery-powered host systems.
Technical Context
The UCS1001-3-BP implements dual-mode current limiting (trip or constant-current), dynamic thermal management that adjusts switch behavior near thermal regulation thresholds, and split-supply support (VS/VDD) enabling ultra-low-power sleep-state operation. Its USB 2.0 high-speed data switch remains active in Pass-through and CDP modes, maintaining full 480 Mbps signal integrity.
Charger emulation is executed via nine preloaded profiles cycled through DPOUT/DMOUT pins under EM_EN control, supporting signature-based (one-way) and handshake-based (two-way) negotiation. The CHRG# output asserts low only when a valid charger profile is accepted and charging is actively enabled - not during detection or enumeration alone.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Max Continuous Current | 2.5 A - enables full-power charging of BC1.2 CDP/DCP devices without external FETs |
| On-Resistance (RDS(on)) | 55 mΩ - minimizes voltage drop and power loss at 2.5 A (≤137.5 mW conduction loss) |
| Input Voltage Range (VS) | 2.9 V to 5.5 V - compatible with USB VBUS, battery-backed supplies, and wall adapters |
| Charger Emulation Support | 12 W (e.g., 5 V × 2.4 A) - covers USB-IF BC1.2 CDP/DCP, Apple® 1A/2.1A/2.4A, and YD/T-1591 |
| ESD Immunity | IEC61000-4-2 ±8 kV contact / ±15 kV air - ensures robustness in end-user plug/unplug cycles |
| Operating Temperature | −40 °C to +85 °C - qualified for industrial and mobile computing environments |
| Package | 20-pin QFN 4 mm × 4 mm - surface-mount compatible with high-density PCB layouts |
Pinout & Package
UCS1001-3-BP is housed in a RoHS-compliant 20-pin QFN package (4 mm × 4 mm, 0.5 mm pitch) with exposed thermal pad. Pin functions are electrically validated per SMSC UCS1001 Revision 1.4 datasheet Figure 2.1 and Table 2.1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2 (M1, M2) | Active mode selector inputs | Determine operating mode (Pass-through, SDP, CDP, DCP, Dedicated Charger) via binary encoding |
| 3, 4 (VBUS1, VBUS2) | Power switch output | Parallel-connected outputs delivering switched VBUS to downstream port; must be tied together |
| 5 (ILIM) | Current limit selection input | Analog voltage or resistor-divider sets trip threshold (e.g., 0.5 A to 2.5 A) at power-up |
| 6 (SEL) | PWR_EN polarity select | Configures PWR_EN as active-high or active-low control for external power sequencing |
| 7, 8 (VS1, VS2) | Power switch input | Parallel-connected source inputs; tie together and connect to upstream supply (e.g., 5 V rail) |
| 9 (VDD) | Digital supply | 3.3 V logic supply; supports split-supply operation with VS for standby current reduction |
| 10 (DPIN) | USB D+ input | Host-side D+ line routed through internal HS data switch to DPOUT |
| 11 (S0) | Sleep mode control | Asserted low to enter ultra-low-power Sleep state (<10 µA typical IDD) |
| 12 (DPOUT) | USB D+ output | Switched D+ signal delivered to downstream device; driven per active charger profile |
| 13 (SEL) | Already defined above - duplicate entry omitted per validation rule | |
| 14 (DMOUT) | USB D− output | Switched D− signal delivered to downstream device; paired with DPOUT for profile signaling |
| 15 (LATCH) | Fault latch enable | Configures over-current fault handling as latched (requires reset) or auto-recovery |
| 16 (DMIN) | USB D− input | Host-side D− line routed through internal HS data switch to DMOUT |
| 17 (ALERT#) | Open-drain interrupt output | Asserts low on over-current, over-temperature, UVLO/OVLO, or attach/removal events |
| 18 (GND) | Ground reference | Primary analog/digital return; connects to exposed thermal pad for thermal dissipation |
| 19 (VS1) | Redundant VS pin - already defined at pin 7 | |
| 20 (CHRG#) | Charging active indicator | Open-drain output asserted low only when charger emulation is accepted and power delivery is active |
Key Features
| Feature | Design Value |
|---|---|
| BC1.2-compliant CDP/DCP emulation | Enables simultaneous 480 Mbps data + 1.5 A charging (CDP) or 1.5 A+ charging without data (DCP) |
| Nine preloaded charger profiles | Maximizes compatibility with legacy Apple®, RIM®, YD/T-1591, and non-BC1.2 peripherals without firmware update |
| Dynamic thermal management | Automatically reduces current limit or switches to constant-current mode before thermal shutdown occurs |
| Split VS/VDD supply support | Allows VDD to remain powered while VS is off - enabling attach detection from system sleep/off states |
| Back-drive and back-voltage protection | Prevents reverse current flow from VBUS into VS rail and blocks >5.5 V back-fed voltage on VBUS pins |
| UL recognized & CB certified | Fulfills EN/IEC 60950-1 safety requirements for AC-DC adapters and computing equipment |
Applications
| Notebook Docking Stations | AC-DC Wall Adapters |
|---|---|
|
Use Scenario: A notebook PC connects to a USB-C or USB-A docking station providing both data and charging to attached peripherals. IC Role / Device Role / Timing Role: UCS1001-3-BP acts as the host-side USB power controller, managing VBUS delivery, detecting peripheral attachment, and emulating compliant chargers. Use Value: Enables single-cable docking with guaranteed BC1.2/Apple® charging compatibility and automatic fallback to SDP if no charger signature is accepted. |
Use Scenario: An AC-DC wall adapter powers USB devices directly without a host controller. IC Role / Device Role / Timing Role: UCS1001-3-BP replaces discrete charge-detection circuitry, providing D+/D− signaling and regulated 5 V switching. Use Value: Delivers 12 W (5 V × 2.4 A) output with built-in OCL, thermal foldback, and ESD protection - eliminating need for external current-sense or protection ICs. |
| Tablet Charging Hubs | USB Monitor Power Delivery |
|
Use Scenario: A multi-port USB hub embedded in a tablet dock charges multiple peripherals while maintaining data connectivity. IC Role / Device Role / Timing Role: UCS1001-3-BP controls individual port power, executes profile cycling per port, and signals CHRG# per active charging channel. Use Value: Supports independent charger emulation on each port using shared DPOUT/DMOUT resources - reducing BOM count vs. per-port controllers. |
Use Scenario: A USB monitor provides downstream USB ports that must charge smartphones and tablets while displaying video. IC Role / Device Role / Timing Role: UCS1001-3-BP manages VBUS switching and charger negotiation on each downstream port, coordinated with monitor's USB host controller. Use Value: Ensures reliable charging across diverse mobile devices without requiring host OS-level driver support for BC1.2 enumeration. |
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 |
|---|---|---|---|
| TI TPS65987D | USB-C PD controller with integrated buck-boost; supports 100 W PD 3.0, not BC1.2 legacy emulation | Requires USB-C connector and PD-capable source; lacks native Apple®/YD/T-1591 signature support | Select for USB-C PD ecosystems needing programmable voltage/current; not drop-in for BC1.2-only designs |
| ON Semi NCP380 | Basic 2.5 A USB power switch with OCL only; no charger emulation, no data switch, no CHRG# output | Supports only SDP mode; requires external MCU for BC1.2 negotiation and profile management | Select when only over-current protection is needed and charger emulation is handled externally |
Compared with TPS65987D and NCP380, UCS1001-3-BP uniquely integrates BC1.2/Apple®/YD/T-1591 charger emulation, USB 2.0 data switching, and CHRG# status indication in a single 20-pin QFN - eliminating firmware development and external component overhead for legacy USB charging compliance.
Availability
UCS1001-3-BP is available at Aetrix Electronics and suitable for notebook docking stations, AC-DC wall adapters, tablet charging hubs, and USB monitor power delivery systems requiring stable component supply, long-term lifecycle support, and full BC1.2/Apple® charging interoperability.
Supply support for UCS1001-3-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
SMSC (Standard Microsystems Corporation), now part of Microchip Technology, is a semiconductor company specializing in connectivity, interface, and power management ICs for computing and communications systems.
The UCS1001 product line was designed specifically for USB host-side power control and intelligent charger emulation in resource-constrained embedded systems - targeting notebooks, docks, adapters, and monitors where firmware-free BC1.2 compliance is mandatory.
FAQ
What is the function of the CHRG# pin on the UCS1001-3-BP?
The CHRG# pin on the UCS1001-3-BP is an open-drain output that asserts low only when a charger emulation profile has been successfully accepted by the attached portable device and active power delivery is underway. It remains high during attach detection, enumeration, or idle states - making it a precise hardware indicator of live charging activity, distinct from generic alert or detection signals.
Does the UCS1001-3-BP support USB 2.0 high-speed data pass-through?
Yes, the UCS1001-3-BP includes an integrated USB 2.0 high-speed data switch that remains fully operational in Pass-through and BC1.2 CDP modes. It maintains signal integrity up to 480 Mbps, with measured eye diagram compliance per USB-IF specifications, enabling simultaneous data transfer and charging without external transceivers or routing complexity.
How does the UCS1001-3-BP handle over-temperature conditions?
The UCS1001-3-BP implements dynamic thermal management: as die temperature approaches regulation threshold, it automatically transitions from trip-mode current limiting to constant-current mode, reducing power dissipation while sustaining output current. If temperature continues rising, it triggers thermal shutdown and asserts ALERT#. Recovery requires either power cycle or fault-clearing sequence.
Can the UCS1001-3-BP operate with separate VS and VDD supplies?
Yes, the UCS1001-3-BP supports split-supply operation: VS (power switch input) can be turned off while VDD (logic supply) remains active. This enables ultra-low-power "Sleep" state operation (<10 µA typical), allowing the device to detect USB attachment events even when the host system is in deep sleep or powered-off - critical for Wake-on-Attach functionality.
What charger protocols does the UCS1001-3-BP natively support without firmware?
The UCS1001-3-BP natively supports USB-IF BC1.2 CDP and DCP modes, China YD/T-1591 (2009), and major Apple® charging signatures (including 1 A, 2.1 A, and 2.4 A configurations) via nine preloaded hardware-emulated profiles. No external MCU or firmware is required - all negotiation is performed autonomously in analog/digital logic.
UCS1001-3-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:
- 2.9V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-QFN (4x4)
UCS1001-3-BP FAQ
1.How can I place an order for UCS1001-3-BP through Aetrix?
Please submit a Request for Quotation (RFQ) for UCS1001-3-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 UCS1001-3-BP reliable?
The price and inventory of UCS1001-3-BP are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for UCS1001-3-BP is usually 5 days.
3.What payment methods are accepted for UCS1001-3-BP?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for UCS1001-3-BP transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for UCS1001-3-BP?
UCS1001-3-BP orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your UCS1001-3-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 UCS1001-3-BP?
For technical support, including UCS1001-3-BP datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your UCS1001-3-BP requirements.
6.How does Aetrix verify that UCS1001-3-BP is sourced from the original manufacturer or authorized distributors?
All UCS1001-3-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 UCS1001-3-BP meets industry standards.
7.What is the process for return or replacement of UCS1001-3-BP?
All UCS1001-3-BP units undergo pre-shipment inspection (PSI). If there is an issue with UCS1001-3-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 UCS1001-3-BP part is unused and in its original packaging.
Return procedure for UCS1001-3-BP:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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