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Microchip Technology UCS1003-3-BP
- Part No.:
- UCS1003-3-BP
- Manufacturer:
- Microchip Technology
- Category:
- Power Management - Specialized
- Package:
- 20-VFQFN Exposed Pad
- Datasheet:
-
UCS1003-3-BP.pdf
- Description:
- IC USB PORT POWER CTRLR 20QFN
- Quantity:
- Payment:
- Shipping:
Inventory:406
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Product details
Overview
UCS1003-3-BP from Microchip Technology is a USB port power controller with integrated charger emulation and attach detection, delivering up to 3.0A continuous current (2.85A typical) with 55 mΩ on-resistance, dynamic thermal regulation, and BC1.2/YD/T-1591/Apple/Samsung/RIM-compatible charging profiles. It operates across 2.9V–5.5V source voltage and supports wake-on-attach via A_DET# pin for low-power system standby states.
For engineers reviewing the UCS1003-3-BP datasheet, UCS1003-3-BP pinout, UCS1003-3-BP application, or UCS1003-3-BP equivalent, this device is selected for USB-C host-side power delivery control in battery-powered embedded systems requiring precise current limiting, multi-standard charger handshaking, and ultra-low-power attach detection without SMBus interface overhead.
Technical Context
The UCS1003-3-BP implements a dual-mode port power switch with selectable overcurrent trip or constant-current limiting, soft turn-on, UVLO/OVLO protection, backdrive/back-voltage blocking, and latch-or-auto-recovery fault handling. Its USB 2.0 high-speed data switch (RON_HSW = 2 Ω, BW = 1100 MHz) enables transparent SDP/CDP data pass-through while maintaining <200 ps total jitter at 480 Mbps.
Unlike the UCS1003-1, it lacks SMBus/I2C and current monitoring but includes dedicated A_DET# open-drain pin for low-power attach detection (IDET_QUAL = 800 µA, tDET_QUAL = 100 ms) and supports nine preloaded charger emulation profiles-including USB-IF BC1.2 CDP/DCP, YD/T-1591, and proprietary Apple/Samsung signatures-with 12W charging capability.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Max Continuous Current | 3.0A (2.85A typical); enables full USB BC1.2 DCP-level charging of smartphones and tablets without external FETs. |
| Port Power Switch RON | 55 mΩ (typical); minimizes voltage drop and power loss at 3A, supporting VBUS ≥ 2.0V under load. |
| Source Voltage Range | 2.9V to 5.5V; compatible with single-cell Li-ion (3.0–4.2V), USB PD sink rails, and 5V wall adapters. |
| Attach Detection Threshold | 800 µA (typical); reliably detects USB peripheral insertion during system sleep with ultra-low IDD_DETECT = 185 µA. |
| Thermal Shutdown Threshold | 135°C; protects against sustained overload or poor PCB thermal design by disabling VBUS output until die cools by 35°C. |
| Operating Temperature | –40°C to +85°C; qualified for industrial and mobile computing environments including notebooks and docking stations. |
| Package | 20-pin QFN (4 mm × 4 mm); exposes thermal pad (EP) for efficient heat dissipation in compact layouts. |
Pinout & Package
UCS1003-3-BP is housed in a 4 mm × 4 mm, 20-pin QFN package with exposed thermal pad (EP). Pin functions are validated per Microchip DS20005346B, page 2 (UCS1003-3 variant diagram).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 20 | GND | Power ground reference; must be connected to low-impedance PCB ground plane with thermal vias to EP. |
| 2 | DMOUT | USB D− output to downstream device; actively driven during charger emulation and data pass-through. |
| 3, 4 | VBUS1, VBUS2 | USB VBUS output pins; paralleled internally to deliver up to 3.0A with shared 55 mΩ RON. |
| 5 | DMIN | USB D− input from upstream host; routed through high-speed switch to DMOUT in SDP/CDP modes. |
| 6 | DPIN | USB D+ input from upstream host; routed through high-speed switch to DPOUT in SDP/CDP modes. |
| 7 | SEL | Charger profile selection control; sets emulation mode (e.g., BC1.2 DCP vs. Apple 2.4A) via resistor ladder. |
| 8 | ALERT# | Open-drain fault indicator; asserts low on overcurrent, thermal shutdown, or VBUS discharge error. |
| 9, 10 | VS1, VS2 | Power switch input rails; accept 2.9–5.5V source; support split-supply configuration with VDD for standby optimization. |
| 11 | VDD | Digital supply (4.5–5.5V); powers logic, charger emulator, and attach detector; decoupling required near pin. |
| 12 | SMCLK/S0 | Not connected (NC) in UCS1003-3; reserved for SMBus clock in UCS1003-1 only. |
| 13 | EM_EN | Charger emulator enable; active-high control to activate BC1.2/YD/T-1591/Apple signature generation on DP/DM. |
| 14 | A_DET# | Open-drain attach detection output; pulls low when >800 µA detected on VBUS, enabling wake-from-sleep. |
| 15 | DPOUT | USB D+ output to downstream device; driven during emulation and passed through during data mode. |
| 16 | M2 | Mode select input; configures current limit level (ILIM2–ILIM8) via external resistor network per Table 1-2. |
| 17 | M1 | Mode select input; used with M2 to select among eight discrete current limit thresholds (570 mA to 3.0 A). |
| 18 | PWR_EN | Active-high power switch enable; controls VBUS1/VBUS2 output; supports latch or auto-recovery fault behavior. |
| 19 | SMDATA/LATCH | Not connected (NC) in UCS1003-3; reserved for SMBus data in UCS1003-1; LATCH function not implemented. |
| EP | Exposed Pad | Thermal and electrical ground; must be soldered to PCB ground plane with ≥9 thermal vias (0.3 mm diameter, 3×3 array). |
Key Features
| Feature | Design Value |
|---|---|
| Wake-on-Attach Detection | Ultra-low-power (185 µA) A_DET# pin triggers system wake from sleep/standby upon USB device insertion. |
| Nine Preloaded Charger Profiles | Hardware-based emulation of USB-IF BC1.2 CDP/DCP, YD/T-1591, Apple 2.4A, Samsung AFC, and RIM standards-no firmware required. |
| Dynamic Thermal Management | Reduces current limit at 110°C (TREG) with 10°C hysteresis; shuts down at 135°C (TTSD) with 35°C recovery margin. |
| Backdrive & Back-Voltage Protection | Prevents reverse current flow from VBUS into VS/VDD; blocks >150 mV back-voltage to avoid damage during hot-plug or adapter removal. |
| Soft Turn-On Rate Control | Controls dI/dt at 100 mA/µs to suppress inrush current and reduce EMI during VBUS ramp-up. |
Applications
| Notebook USB Charging Hub | Industrial Docking Station |
|---|---|
|
Use Scenario: Notebook with dual USB-A ports delivers fast charging to peripherals while maintaining USB 2.0 data integrity. IC Role / Device Role / Timing Role: UCS1003-3-BP acts as intelligent port power switch and BC1.2 charger emulator, managing VBUS delivery and DP/DM signature generation. Use Value: Enables 3.0A charging without host CPU intervention; A_DET# wake signal reduces system power consumption during idle. |
Use Scenario: Industrial docking station provides USB power and data to multiple field devices in factory automation. IC Role / Device Role / Timing Role: UCS1003-3-BP serves as robust port controller with thermal shutdown and latch-fault handling for unattended operation. Use Value: 55 mΩ RON ensures stable VBUS under 3A load; –40°C to +85°C rating supports wide ambient deployment. |
| AC-DC Wall Adapter w/ USB Port | Tablet Host-Side Power Manager |
|
Use Scenario: Compact wall adapter integrates USB-A port with smart charging for consumer electronics. IC Role / Device Role / Timing Role: UCS1003-3-BP replaces discrete FET + MCU solution, providing hardware-emulated charger signatures and OCL protection. Use Value: Eliminates firmware development; nine preloaded profiles ensure compatibility with legacy and modern smartphones. |
Use Scenario: Tablet motherboard manages USB OTG power delivery and peripheral attach detection during battery-powered operation. IC Role / Device Role / Timing Role: UCS1003-3-BP functions as low-quiescent-power USB port controller with wake-on-insert capability. Use Value: 5 µA sleep current and 185 µA detect current extend battery life; A_DET# enables instant wake without polling. |
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 | No charger emulation; USB 2.0 redriver only; no power switching or current limiting. | Used solely for signal integrity boost-not for power delivery or BC1.2 compliance. | Select only if USB data signal restoration is needed without power control. |
| TPS2546RTER | Integrated USB 2.0 switch + BC1.2 DCP/CDP emulator; supports 2.5A max; no A_DET# or wake-on-attach. | Lacks ultra-low-power attach detection; requires external microcontroller for wake management. | Choose when higher integration (integrated 5V LDO) is prioritized over sleep-state wake capability. |
Compared with TUSB211IRWBR and TPS2546RTER, UCS1003-3-BP uniquely combines 3.0A power switching, nine-hardware charger profiles, and A_DET#-based wake-on-attach in a single 4×4 mm QFN-enabling self-contained, firmware-free USB power control in battery-sensitive designs.
Availability
UCS1003-3-BP is available at Aetrix Electronics and suitable for notebook computers, industrial docking stations, and AC-DC wall adapters requiring stable component supply, long-term lifecycle support, and qualification for extended temperature operation.
Supply support for UCS1003-3-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
Microchip Technology Inc. is a leading provider of microcontrollers, analog components, and USB interface solutions, with global manufacturing and quality certifications including ISO 9001 and AEC-Q200.
The UCS1003 family was designed specifically for USB host-side power delivery control in portable and embedded systems-emphasizing hardware-based charger emulation, thermal resilience, and ultra-low-power attach detection without software dependency.
FAQ
What is the primary function of the UCS1003-3-BP in a USB system?
The UCS1003-3-BP serves as a fully integrated USB port power controller that combines a 3.0A current-limited power switch, nine preloaded hardware-based charger emulation profiles (including BC1.2, YD/T-1591, Apple, and Samsung), and ultra-low-power attach detection via the A_DET# pin. Unlike the UCS1003-1, it omits SMBus interface and current monitoring, making it ideal for cost- and space-constrained host-side applications where firmware-free, reliable charging and wake-on-insert are critical. The UCS1003-3-BP does not require host processor involvement to initiate charging or detect attachment.
How does the UCS1003-3-BP differ from the UCS1003-1 and UCS1003-2 variants?
The UCS1003-3-BP is distinguished by its inclusion of the A_DET# open-drain attach detection pin and exclusion of SMBus/I2C interface and current monitoring circuitry-features present in the UCS1003-1. It shares the same nine preloaded charger profiles and current-limit selection (via M1/M2 resistors) with the UCS1003-2, but differs by using A_DET# instead of the CHRG# pin found on the UCS1003-2. This makes the UCS1003-3-BP optimal for systems requiring wake-from-sleep on USB insertion without SMBus overhead, whereas the UCS1003-1 suits applications needing programmable profiles and real-time current telemetry.
What current limit options are available on the UCS1003-3-BP, and how are they configured?
The UCS1003-3-BP supports eight discrete current limit settings-from 570 mA to 3.0 A-selected using external resistors on the M1 and M2 pins per Table 1-2 of DS20005346B. For example, M1 = 100 kΩ and M2 = 82 kΩ yields ILIM8 = 3.0 A (2.85A typical). These settings configure the port power switch's overcurrent threshold and constant-current limiting behavior. No software or register writes are needed; configuration is purely hardware-based via resistor ladders, ensuring deterministic behavior across power cycles and temperature ranges. The UCS1003-3-BP does not support dynamic reconfiguration after boot.
Does the UCS1003-3-BP support USB 2.0 high-speed data pass-through, and what are its signal integrity specs?
Yes, the UCS1003-3-BP integrates a USB 2.0-compliant high-speed data switch with 1100 MHz –3 dB bandwidth, <200 ps total jitter at 480 Mbps, and <25 ps propagation skew between DP and DM paths. Its on-resistance is 2 Ω (typical) at 5V, and off-isolation exceeds –30 dB at 240 MHz. The switch operates transparently in SDP and CDP modes, preserving eye diagram integrity as verified in Figures 2-1 and 2-2 of DS20005346B. It does not support USB 3.x or SuperSpeed; its data path is strictly USB 2.0 high-speed (480 Mbps) only.
What thermal protection mechanisms does the UCS1003-3-BP implement, and how do they affect operation?
The UCS1003-3-BP features three-tiered thermal protection: (1) Dynamic thermal regulation begins at 110°C (TREG), reducing current limit with 10°C hysteresis; (2) Thermal shutdown activates at 135°C (TTSD), turning off VBUS until die temperature drops by 35°C; and (3) Short-circuit response limits current within 1.5 µs and disconnects VBUS within 6 ms. These mechanisms prevent permanent damage during sustained overload or poor heatsinking. All thresholds are silicon-characterized-not trimmed-and operate independently of host control, ensuring fail-safe behavior even in unattended systems. The UCS1003-3-BP relies on PCB thermal vias to EP for effective heat transfer.
UCS1003-3-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:
- 4.5V ~ 5.5V
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-QFN (4x4)
UCS1003-3-BP FAQ
1.How can I place an order for UCS1003-3-BP through Aetrix?
Please submit a Request for Quotation (RFQ) for UCS1003-3-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 UCS1003-3-BP reliable?
The price and inventory of UCS1003-3-BP are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for UCS1003-3-BP is usually 5 days.
3.What payment methods are accepted for UCS1003-3-BP?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for UCS1003-3-BP transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for UCS1003-3-BP?
UCS1003-3-BP orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your UCS1003-3-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 UCS1003-3-BP?
For technical support, including UCS1003-3-BP datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your UCS1003-3-BP requirements.
6.How does Aetrix verify that UCS1003-3-BP is sourced from the original manufacturer or authorized distributors?
All UCS1003-3-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 UCS1003-3-BP meets industry standards.
7.What is the process for return or replacement of UCS1003-3-BP?
All UCS1003-3-BP units undergo pre-shipment inspection (PSI). If there is an issue with UCS1003-3-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 UCS1003-3-BP part is unused and in its original packaging.
Return procedure for UCS1003-3-BP:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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