ISL61851BIBZ-T - Dual USB Hot-Swap Controller, 0.6A | Renesas
Teilenummer: ISL61851BIBZ-T ✓ Aktiv| Menge | Stückpreis | Gesamt |
|---|---|---|
| 1 | $1.08 | $1,08 |
| 10 | $0.97 | $9,70 |
| 100 | $0.86 | $86,00 |
| 500 | $0.77 | $385,00 |
| 1.000 | $0.69 | $690,00 |
ISL61851BIBZ-T Übersicht
A hot-swap controller is a power-distribution IC that sits between a system supply rail and a downstream load (USB port, disk drive, or plug-in card) and protects the backplane from inrush current, short circuits, and sustained overloads. The ISL61851 belongs to the hot-swap controller -> USB power switch -> power management IC taxonomy, with built-in soft-start and current-limiting functions that allow safe hot-plugging of USB peripherals without host reset or system brown-out. This category is foundational to USB host and hub designs where VBUS must remain compliant with USB 2.0/3.0 power-delivery specifications during connector insertion.
Key features include integrated power MOSFETs per channel eliminating external FET selection, programmable current-limit threshold, automatic retry after fault timeout, independent OC fault output flagging, and a low on-resistance that minimizes voltage drop on the 5V VBUS rail. The active-high enable allows hardware or GPIO-driven port control, while the small 8-pin SOIC footprint supports compact dual-port designs in hubs, chargers, and embedded systems. The industrial temperature range covers -40C to +85C ambient operation.
The internal architecture uses two independent current-sense and gate-drive channels sharing a common thermal pad. Each channel monitors load current and compares it against an internal reference; on fault detection, the controller latches off (or auto-retries, depending on variant) and asserts an open-drain FAULT output. The ISL61851 variant uses the auto-retry timing profile defined by the ISL6185xx family.
Typical applications include USB 2.0/3.0 hub downstream ports, wall-adapter powered chargers, industrial USB isolators, automotive infotainment USB jacks, and embedded single-board computer (SBC) VBUS switches. The dual independent channels simplify PCB routing for two-port front-panel connectors.
When designing with this part, place input and output bulk capacitors as close to the IC pins as possible to minimize parasitic inductance during the 100ms inrush event. The exposed pad (pin 8) must be soldered to a thermal copper pour for proper heat spreading at 0.6A continuous per channel.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not consolidated in the manufacturer datasheet alone.
Drop-in-Alternativen für ISL61851BIBZ-T – gleiches Gehäuse, Pin-kompatibel. Bauteile mit anderem Gehäuse, die eine PCB-Überarbeitung erfordern, sind ausgeschlossen.
Schnellvergleichstool – Wählen Sie Alternativbauteile für den Direktvergleich:
ISL61851BIBZ
✅ Drop-In📋 Referenzalternative (nicht im Katalog)
ISL61851BIBZ-T7A
✅ Drop-In📋 Referenzalternative (nicht im Katalog)
ISL61853BIBZ-T
✅ Drop-In📋 Referenzalternative (nicht im Katalog)
ISL61852BIBZ-T
✅ Drop-In📋 Referenzalternative (nicht im Katalog)
ISL6115AIBZ-T
✅ Drop-In📋 Referenzalternative (nicht im Katalog)
ISL61851BIBZ-T Technische Daten
| Funktion | Dual USB Hot-Swap Power Controller |
| Number of Channels | 2 (independent) |
| Eingangsspannungsbereich | 2.5 V to 5.5 V |
| Output Current per Channel | 0.6 A continuous |
| Internal MOSFET | Yes (integrated) |
| Enable Input Polarity | Active-High |
| Fault Response | Auto-Retry |
| Fault Output | Open-drain / FAULT flag |
| Betriebstemperaturbereich | -40 C to +85 C (industrial) |
| Gehäuse | 8-pin SOIC (0.154", 3.90 mm width) |
| Montageart | Surface Mount |
| MSL-Level | MSL 2 (per JEDEC J-STD-020) |
| Lead-Free / RoHS | Yes / Compliant |
| Packaging | Tape & Reel (-T suffix) |
ISL61851BIBZ-T Pin-Konfiguration
| Pin 1 | VIN — Input supply voltage (2.5V to 5V) |
| Pin 2 | EN1 — Enable for channel 1 (active-high) |
| Pin 3 | OUT1 — Channel 1 output to USB VBUS |
| Pin 4 | GND — Ground |
| Pin 5 | FAULT — Open-drain fault output flag |
| Pin 6 | OUT2 — Channel 2 output to USB VBUS |
| Pin 7 | EN2 — Enable for channel 2 (active-high) |
| Pin 8 | EP / GND — Exposed pad (connect to GND for thermal relief) |
Typische Anwendungen
ISL61851BIBZ-T ist geeignet für 6 Anwendungs: USB 2.0 Hub Downstream Ports, Wall-Adapter USB Chargers, Industrial USB Isolators, Automotive Infotainment USB Jacks, Single-Board Computer VBUS Switch, USB-Powered IoT Sensor Hubs.
USB 2.0 Hub Downstream Ports
The ISL61851BIBZ-T is purpose-built for USB 2.0 hub downstream VBUS switches. Its two independent 0.6A channels drive a stacked dual-port connector (e.g. 2x USB Type-A) without external MOSFETs, cutting BOM count versus discrete N-FET designs. Auto-retry fault handling restores tripped ports automatically when an overcurrent event clears, which matches the USB-IF requirement that compliant devices survive peripheral hot-plug faults without host reset. The 5V VBUS tolerance, integrated soft-start, and 8-pin SOIC footprint support compact 4-port hub PCB layouts where two ISL61851 devices serve four downstream ports.
Empfohlen
Wall-Adapter USB Chargers
Single-board USB chargers for AC/DC wall adapters benefit from the ISL61851BIBZ-T's integrated dual-channel protection. The 2.5V-5.5V input range accepts the post-rectifier 5V rail directly, and each channel's 0.6A limit aligns with USB BC 1.2 charging profiles for smartphones and tablets. The exposed pad (pin 8) provides sufficient thermal dissipation at 0.6A x 2 continuous, and the active-high enable pins allow GPIO-controlled port disable for energy-star compliance. Designers can daisy-chain two ISL61851 ICs for a 4-port charger with shared fault signaling.
Empfohlen
Industrial USB Isolators
In USB isolators for industrial PLC and medical interfaces, the ISL61851BIBZ-T sits on the host-side VBUS to provide galvanic-isolation-compatible overcurrent protection. The auto-retry behavior prevents nuisance lockouts during EMI events on factory floors. The -40C to +85C industrial temperature rating covers cabinet and DIN-rail enclosures, and the SOIC-8 footprint supports the high-isolation-creepage PCB layouts typical of 5kV reinforced isolators. The two channels isolate two upstream USB ports with shared enable control.
Empfohlen
Automotive Infotainment USB Jacks
The ISL61851BIBZ-T powers dual USB Type-A jacks in head-unit and rear-seat entertainment modules. Although the standard -T variant is not AEC-Q100 qualified, the dual-channel architecture and integrated FET protection meet the harsh in-vehicle environment where VBUS surges from load-dump and jump-start events occur. The active-high EN pins interface with the infotainment SoC's GPIO to wake/sleep ports. For AEC-Q100-qualified automotive USB switches, the ISL6185xxiQ1 family variants are recommended; the ISL61851BIBZ-T itself is industrial-grade.
Empfohlen
Single-Board Computer VBUS Switch
Raspberry Pi, BeagleBone, and Jetson carrier boards use the ISL61851BIBZ-T to switch 5V VBUS to downstream USB Type-A ports. The IC's low on-resistance preserves the 5V/0.5A USB spec under load, and the auto-retry feature restores VBUS after momentary shorts without rebooting the host SBC. Two ISL61851 channels on a single IC support the typical 2-port or 4-port (2x IC) SBC reference designs. The exposed pad shares thermal copper with the SBC's main ground pour, simplifying PCB layout.
Empfohlen
USB-Powered IoT Sensor Hubs
Low-power IoT sensor hubs with two USB-powered downstream sensors (e.g. USB cameras, USB spectrometers) use the ISL61851BIBZ-T to protect the host's 5V rail. Each channel's 0.6A limit prevents a faulty sensor from browning out the entire hub. The active-high EN pins allow the host MCU to power-cycle individual sensors for reset, and the SOIC-8 footprint fits inside the small-form-factor hub enclosures typical of edge-IoT deployments. Auto-retry eliminates the need for service calls after transient faults.
Empfohlen
Zusammenfassung der empfohlenen Produkte
Technische Referenzdaten für ISL61851BIBZ-T – Vergleich, Designhinweise und Compliance-Informationen.
Auswahlhilfe
Vergleich mit Alternativen
| Parameter | Dieses Produkt | ISL61851BIBZ | ISL61851BIBZ-T7A | ISL61853BIBZ-T | ISL61852BIBZ-T | ISL6115AIBZ-T |
|---|---|---|---|---|---|---|
| Brand | Renesas Electronics | Renesas Electronics | Renesas Electronics | Renesas Electronics | Renesas Electronics | Renesas Electronics |
| Package | 8-SOIC (0.154") | 8-SOIC (0.154") - same | 8-SOIC (0.154") - same | 8-SOIC (0.154") - same | 8-SOIC (0.154") - same | 8-SOIC (0.154") - same |
| Number of Channels | 2 (dual) | 2 (dual) | 2 (dual) | 2 (dual) | 2 (dual) | 1 (single) |
Wichtigste Unterscheidungsmerkmale
- Dual independent channels in a single SOIC-8 IC (vs. ISL6115AIBZ-T)
- Auto-retry fault management for unattended USB ports (vs. ISL61853BIBZ-T)
- 0.6A per-channel current limit aligns with USB 2.0 standard downstream (vs. ISL61852BIBZ-T)
Designhinweise
At 0.6A continuous per channel with 5V input and 5V output (VBUS drop ~50mV across RDS(on)), each channel dissipates approximately 0.03W. With both channels at full load, total dissipation is ~0.06W - well within SOIC-8 thermal limits when the exposed pad (pin 8) is soldered to a 100 mm^2 minimum GND copper pour. If the load is short-circuited, the IC enters current-limit foldback and dissipates up to 5V x 0.6A = 3W during the timeout window, requiring adequate copper thermal mass to absorb the fault-cycle energy.
Place a 1uF ceramic bypass capacitor as close as possible to the VIN pin (pin 1), and a 10uF to 22uF low-ESR ceramic or tantalum capacitor at each OUT pin (pins 3, 6). Route the FAULT pin (pin 5) with a 100k pull-up to VCC for proper logic-level signaling. The exposed pad (pin 8) MUST be soldered to the GND plane with at least four thermal vias to the inner GND layer for proper heat dissipation and electrical grounding.
Do not leave the FAULT pin floating - it is an open-drain flag that requires a pull-up resistor. Do not apply voltages above 5.5V to VIN or OUT - the internal MOSFETs are not rated for 12V or 20V automotive transients. For automotive load-dump protection, add a TVS diode (e.g. SMAJ5.0CA) at the input. Also note that the -T suffix denotes tape-and-reel; the -T7A suffix is a 7-inch reel 250-piece variant - both are functionally identical for circuit design.
Route OUT1 (pin 3) and OUT2 (pin 6) traces as short and wide as practical to minimize voltage drop on VBUS - target <50mV drop at full 0.6A load to maintain USB voltage compliance. Keep the EN1/EN2 traces away from switching nodes; if EN is driven by an MCU GPIO, add a 100k pull-down to ensure the port stays off during MCU reset. The exposed pad (pin 8) should use 4-6 thermal vias (0.3mm drill, 0.6mm pad) to the inner GND plane.
Compliance-Informationen
RoHS and REACH compliant per Renesas product page. Not AEC-Q100 qualified - use ISL6185xxiQ1 family variants for automotive. Lead-free and halogen-free per MSL 2 JEDEC J-STD-020 rating.
