UCS2114-1-V/LX - Dual USB 3A Power Switch w/ Current Sense | Microchip
Référence : UCS2114-1-V/LX ✓ Actif| Qté | Prix unitaire | Total |
|---|---|---|
| 1 | $3.84 | $3,84 |
| 10 | $3.45 | $34,50 |
| 100 | $2.96 | $296,00 |
| 500 | $2.55 | $1 275,00 |
| 1 000 | $2.2 | $2 200,00 |
UCS2114-1-V/LX Présentation
A USB power switch is a high-side load switch that delivers the 5 V VBUS rail to downstream USB ports while protecting the upstream supply from fault conditions. The UCS2114 belongs to the power-distribution switch category, sitting between a 5 V regulator and the USB connectors; it is a specialized USB high-side switch with current monitoring, integrating a back-to-back N-channel MOSFET topology, an internal charge pump, and an 8-bit ADC accessible over SMBus for current and voltage read-back.
Key features include 3.0 A continuous load current per channel, 3.4 A peak, programmable current-limit threshold, automatic retry after fault, dedicated FLG (fault) output, thermal shutdown, and 5.5 V absolute maximum input voltage. The VQFN-20 package (3x3 mm) provides a low-profile, thermally efficient footprint suitable for compact USB hub designs, docking stations, and embedded PC platforms where PCB real estate is at a premium.
The integrated current sensor uses an internal sense FET with a calibrated gain, reported through the SMBus interface for system-level power budgeting. Compared with discrete solutions using an external current-sense amplifier, the UCS2114 saves board area, simplifies the BOM, and reduces calibration effort at production. This architecture is well suited to multi-port USB applications where per-port current telemetry is required by USB-IF Battery Charging v1.2 or proprietary charging protocols.
Typical applications include USB 3.0/3.1 hubs, USB-C power-delivery accessory side controllers, docking stations, notebook and tablet charging ports, and embedded SBC platforms. The 3.4 A peak capability supports USB Battery Charging v1.2 CDP/DCP modes and standard downstream ports needing 5 V @ 2.4 A to 3.0 A.
Designers should observe good input-bulk and bypass capacitor placement (per manufacturer guidance) and ensure the exposed thermal pad is soldered to a sufficient copper pour for sustained 3 A operation. Select the /LX suffix for tube packaging or /LX-T for tape-and-reel; both share the same silicon and pinout.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet.
Alternatives de remplacement direct pour UCS2114-1-V/LX — même boîtier, compatible broche à broche. Les références à boîtier différent nécessitant une retouche du PCB sont exclues.
Outil de comparaison rapide — sélectionnez des références alternatives pour une comparaison côte à côte :
UCS2114T-1-V/LX
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
UCS2114-1-V/LX-T
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
UCS2114-2-V/LX
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
UCS2114-3-V/LX
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
UCS2114T-2-V/LX
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
UCS2114-1-V/LX Valeurs maximales et caractéristiques électriques
| Number of Channels | 2 (dual) |
| Switch Type | USB High-Side Power Switch |
| Output Current per Channel (Continuous) | 3.0 A |
| Output Current per Channel (Maximum) | 3.4 A |
| Plage de tension d'entrée | 5 V typical (5.5 V abs max) |
| Current Limit Threshold | Programmable |
| Current Sense / Monitoring | Integrated (SMBus/I2C telemetry) |
| Interface | SMBus (default address 57h) |
| Fault Handling | Auto-recovery |
| Protection Features | Overcurrent, undervoltage, overvoltage, thermal shutdown |
| Enable Inputs | Per-port active-high EN |
| Fault Indicator Output | Yes (open-drain FLG) |
| Boîtier | 20-pin VQFN (3x3 mm) |
| Type de montage | Surface Mount |
| Packaging Type | Tube (/LX suffix) |
| Statut RoHS | Compliant |
| Lead-Free | Yes |
Configuration des broches de UCS2114-1-V/LX
| Broche 1 | EN1 — Port 1 enable (active-high) |
| Broche 2 | FLG1 — Port 1 fault indicator (open-drain) |
| Broche 3 | GND — Ground |
| Broche 4 | VBUS1 — Port 1 output to VBUS |
| Broche 5 | VIN — 5 V supply input |
| Broche 6 | VIN — 5 V supply input (second bond pad) |
| Broche 7 | VBUS2 — Port 2 output to VBUS |
| Broche 8 | GND — Ground |
| Broche 9 | FLG2 — Port 2 fault indicator (open-drain) |
| Broche 10 | EN2 — Port 2 enable (active-high) |
| Broche 11 | SMBUS_CLK — SMBus clock |
| Broche 12 | SMBUS_DATA — SMBus data |
| Broche 13 | ADDR — SMBus address select |
| Broche 14 | SCL/SDA — I2C/SMBus interface pins |
| Broche 15 | PROG — Current-limit programming |
| Broche 16 | NC — Not connected (per datasheet) |
| Broche 17 | NC — Not connected (per datasheet) |
| Broche 18 | NC — Not connected (per datasheet) |
| Broche 19 | NC — Not connected (per datasheet) |
| Broche 20 | NC — Not connected (per datasheet) |
Applications typiques
UCS2114-1-V/LX convient pour 6 applications: USB 3.0/3.1 Hub Port Power, USB-C Accessory / Docking Station, Notebook and Tablet Charging Ports, Industrial / Embedded SBC USB Ports, Automotive Infotainment USB Ports, USB Power Monitoring / Test Equipment.
USB 3.0/3.1 Hub Port Power
The UCS2114-1-V/LX is purpose-built for USB 3.0/3.1 hub downstream port power distribution, where each port requires 5 V at up to 3.0 A continuous for BC 1.2 charging and high-current USB-C accessory power. According to the Microchip datasheet, the dual-channel integration means one IC powers two downstream ports, reducing BOM and PCB area versus discrete single-channel switches. The integrated current sensor reports per-port consumption over SMBus, enabling the hub controller to enforce power budgets and detect non-compliant loads. Compared with discrete solutions, the UCS2114 eliminates external sense resistors and the current-sense amplifier, simplifying layout while preserving accuracy.
Recommandé
USB-C Accessory / Docking Station
USB-C docking stations and accessory side controllers require tightly-managed 5 V VBUS with per-port current monitoring, exactly the role the UCS2114-1-V/LX targets. The part's 3.4 A peak capability supports USB PD 5 V @ 3 A profiles and BC 1.2 CDP/DCP modes. The exposed thermal pad and 3x3 mm VQFN footprint fit the slim thermal envelope of dock enclosures, while the SMBus telemetry feed lets the dock MCU log power consumption for diagnostics. Placed downstream of the PD controller's 5 V supply, the UCS2114 provides the final fault barrier between the regulator and the USB-C receptacle.
Recommandé
Notebook and Tablet Charging Ports
The UCS2114-1-V/LX fits the charging-port architecture of notebooks and tablets where 5 V at 2.4 A or 3.0 A is delivered to downstream USB-A or USB-C ports for fast-charging tablets and phones. Per the Microchip datasheet, the auto-recovery fault handling prevents nuisance latched-off behavior after transient overloads, while UVLO/OVP protects the system battery rail from back-feed faults. The integrated current sense allows the embedded controller (EC) to read per-port current over SMBus and throttle or disable ports based on system power-budget headroom. This is a clear fit for slim-and-light notebooks where the 3x3 mm VQFN footprint saves precious PCB area.
Recommandé
Industrial / Embedded SBC USB Ports
Industrial single-board computers (SBCs) and embedded platforms often expose two USB 2.0/3.0 ports to field devices, peripherals, or modems that require robust, monitored 5 V power. The UCS2114-1-V/LX delivers 3.0 A continuous per port with auto-recovery fault handling, eliminating the need for service calls after a transient overcurrent event. The SMBus current/voltage readback enables remote diagnostics over the SBC's management interface. Compared to a fuse-and-reset design, the UCS2114's precise OCL threshold protects upstream supplies from sustained overload and reduces field returns due to nuisance tripping.
Recommandé
Automotive Infotainment USB Ports
The UCS2114-1-V/LX's wide 5 V input range and robust protection suite (OVP, UVLO, OCP, thermal shutdown) makes it suitable for automotive infotainment USB charging ports fed by a regulated 5 V rail. The integrated dual channels power front-seat and rear-seat USB outlets from a single 3x3 mm VQFN footprint, ideal for space-constrained head units. SMBus telemetry allows the infotainment MCU to report per-port charging current to the cluster display, improving driver visibility into connected device status. The auto-recovery fault handling prevents latch-up after a hot-insertion transient, a common failure mode in vehicles.
Recommandé
USB Power Monitoring / Test Equipment
USB power monitors and compliance test fixtures benefit from the UCS2114-1-V/LX's integrated current-sensing ADC and SMBus interface. Each port's voltage and current can be sampled by a host MCU for logging, validation, and pass/fail reporting during USB-IF compliance testing. The 3.4 A peak capability and high-accuracy OCL make it a useful reference load for stress-testing cables and connectors. Compared with an external current-sense amplifier, the integrated ADC and calibration save calibration time and reduce fixture-to-fixture variance.
Recommandé
Récapitulatif des produits recommandés
Données de référence d'ingénierie pour UCS2114-1-V/LX — comparaison, recommandations de conception et informations de conformité.
Guide de sélection
Comparaison avec les alternatives
| Paramètre | Ce produit | UCS2114T-1-V/LX | UCS2114-1-V/LX-T | UCS2114-2-V/LX | UCS2114-3-V/LX | UCS2114T-2-V/LX |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | VQFN-20 (3x3 mm) | VQFN-20 (3x3 mm) - same | VQFN-20 (3x3 mm) - same | VQFN-20 (3x3 mm) - same | VQFN-20 (3x3 mm) - same | VQFN-20 (3x3 mm) - same |
| Number of Channels | 2 (dual) | 2 (dual) | 2 (dual) | 2 (dual) | 2 (dual) | 2 (dual) |
| Continuous Current per Port | 3.0 A | 3.0 A | 3.0 A | 3.0 A | 3.0 A | 3.0 A |
| Peak Current per Port | 3.4 A | 3.4 A | 3.4 A | 3.4 A | 3.4 A | 3.4 A |
| SMBus Address | 57h (default) | 57h | 57h | alternate (non-57h) | alternate (non-57h) | alternate (non-57h) |
| Packaging Media | Tube | Tape & Reel | Tape & Reel | Tube | Tube | Tape & Reel |
| Integrated Current Sense | Yes (SMBus telemetry) | Yes (SMBus telemetry) | Yes (SMBus telemetry) | Yes (SMBus telemetry) | Yes (SMBus telemetry) | Yes (SMBus telemetry) |
| Auto-Recovery Fault Handling | Yes | Yes | Yes | Yes | Yes | Yes |
Principaux différenciateurs
- True dual-port 3 A switch with integrated current sense in 3x3 mm VQFN (vs TPS2041B (single-channel, no telemetry))
- SMBus default address 57h enables multi-IC bus configuration (vs UCS2114-2-V/LX (alternate SMBus address))
- Auto-recovery fault handling without host intervention (vs Discrete fuse + load switch (no auto-recovery))
Notes de conception
At full 3.0 A continuous load on both channels, the UCS2114-1-V/LX dissipates significant power through its internal MOSFETs. The VQFN-20 (3x3 mm) package exposes a thermal pad that MUST be soldered to a ground copper pour with adequate thermal vias. Estimated: assuming Rdson of 60 mOhm per channel and 3 A continuous, each channel dissipates approximately 0.54 W; both channels simultaneously push roughly 1.1 W total. A minimum 25 mm x 25 mm copper pour on the top layer with 4-6 thermal vias to inner ground planes is recommended for sustained operation at 3 A per port.
Place input and output bulk capacitors as close as physically possible to the VIN and VBUS pins of the UCS2114-1-V/LX. The Microchip datasheet recommends a low-ESR 10 uF ceramic on VIN and a 10 uF ceramic on each VBUS output, plus a 0.1 uF HF bypass. Keep the SMBus traces short and route them away from the VBUS switching nodes to avoid coupling noise into the telemetry ADC. A four-layer PCB with a dedicated ground plane is strongly recommended to minimize return-path impedance for the high-di/dt VBUS currents.
Common pitfalls with the UCS2114-1-V/LX include (1) forgetting to solder the exposed thermal pad, leading to thermal shutdown under load, (2) sharing the same SMBus address across multiple UCS2114 parts - verify the address (-1 suffix = 57h, -2 and -3 are alternate addresses), (3) overlooking the FLG open-drain pull-up resistor which must be present for fault signaling, and (4) routing VBUS output traces with insufficient copper weight (use 1 oz minimum, 2 oz preferred) to handle 3 A continuous without excessive voltage drop. The auto-recovery fault timer also depends on the PROG pin capacitor - do not omit it.
The SMBus interface on the UCS2114-1-V/LX operates at standard-mode (100 kHz) or fast-mode (400 kHz) speeds. Use 4.7 kOhm pull-ups on SCL and SDA, and add a series resistor near the device if the trace exceeds 50 mm to dampen ringing. The current-sense ADC inside the UCS2114 measures the voltage across the internal sense FET, so SMBus readback accuracy is sensitive to ground bounce between the IC and the host MCU - use a star-ground topology if the layout permits. Per the Microchip datasheet, the SMBus DATA pin is open-drain and requires an external pull-up.
Informations de conformité
RoHS compliant and lead-free per Microchip product page. Not AEC-Q100 qualified - this is a commercial/industrial grade part. For automotive applications, consult Microchip for AEC-Q100 qualified alternatives.
