# ISL61861BIBZ

**RENESAS** · Monitors & Reset Circuits · SOIC-8

ISL61861BIBZ from RENESAS, in a SOIC-8. Pinout and pin descriptions extracted from the manufacturer datasheet (extract_pins, cross-checked by a second model); symbol, footprint, and 3D from KiCad-official CAD.

## Pinout

| Pin | Name | Type | Function |
|---|---|---|---|
| 1 | GND | power_in | IC ground reference. |
| 2 | VIN | power_in | Chip bias and controlled voltage input with UVLO; range 0V to 5.5V, and below VIN < 1.7V the chip is disabled, FLT floats and OUT is held low. |
| 3 | VIN | power_in | Chip bias and controlled voltage input with UVLO; range 0V to 5.5V, and below VIN < 1.7V the chip is disabled, FLT floats and OUT is held low. |
| 4 | EN/EN | input | Enable input for this variant, active high (EN per ordering table), with an internal 1M pull-off resistor; range 0V to VIN. |
| 5 | FLT | output | Overcurrent fault indicator that floats and is disabled until VIN > VUVLO, is pulled low after the current-limit time-out expires, is not signaled for over-temperature shutdown; range 0V to VIN. |
| 6 | OUT | power_out | Controlled supply output that is current limited on overcurrent with response within 200µs and remains in current limit for a nominal 12ms before turn-off (retry version); range 0V to VIN. |
| 7 | OUT | power_out | Controlled supply output that is current limited on overcurrent with response within 200µs and remains in current limit for a nominal 12ms before turn-off (retry version); range 0V to VIN. |
| 8 | OUT | power_out | Controlled supply output that is current limited on overcurrent with response within 200µs and remains in current limit for a nominal 12ms before turn-off (retry version); range 0V to VIN. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | RENESAS |
| Package | SOIC-8 |
| Category | Power Management ICs |
| Pins | 8 |

## Electrical characteristics

Limits as printed in the datasheet (page.json `metadata.characteristics` carries them as data).

| Parameter | Symbol | Min | Typ | Max | Unit | Conditions | Page |
|---|---|---|---|---|---|---|---|
| Output Pull-Down Resistor | ROUT_PD | 3.4 | 5 | 6 | kΩ | VIN = 5V, Switch Disabled | 6 |
| Maximum Continuous Current, VIN = 5V (ISL6186xA, B, E, F) | IOUT_CONT_5 |  |  | 1.5 | A | VIN = 5V; guaranteed by the Minimum Itrip Current Specification | 6 |
| Maximum Continuous Current, VIN = 3.3V (ISL6186xA, B, E, F) | IOUT_CONT_3 |  |  | 1.5 | A | VIN = 3.3V; guaranteed by the Minimum Itrip Current Specification | 6 |
| Trip Current, VIN = 5V (ISL6186xA, B, E, F) | ITRIP_5 | 1.7 | 2.5 | 3.3 | A | VIN = 5V | 6 |
| Trip Current, VIN = 3.3V (ISL6186xA, B, E, F) | ITRIP_3 | 1.7 | 2.1 | 2.7 | A | VIN = 3.3V | 6 |
| Current Limit, VIN = 5V (ISL6186xA, B, E, F) | ILIM_5 | 1.37 | 1.6 | 1.81 | A | VIN = 5V, VIN - VOUT = 1V | 6 |
| Current Limit, VIN = 3.3V (ISL6186xA, B, E, F) | ILIM_3 | 1.35 | 1.5 | 1.77 | A | VIN = 3.3V, VIN - VOUT = 1V | 6 |
| Current Limit, VIN = 2.5V (ISL6186xA, B, E, F) | ILIM_2 | 1.3 | 1.5 | 1.7 | A | VIN = 2.5V, VIN - VOUT = 1V | 6 |
| Short Circuit Current, VIN = 5V (ISL6186xA, B, E, F) | Isc_5 | 1.45 | 2 | 2.35 | A | VIN = 5V, VOUT = 0V | 6 |
| Short Circuit Current, VIN = 3.3V (ISL6186xA, B, E, F) | Isc_3 | 0.95 | 1.2 | 1.5 | A | VIN = 3.3V, VOUT = 0V | 6 |
| Current Limit Duration | tCL | 9.2 | 12 | 15 | ms | IOUT = ILIM | 6 |
| Automatic Retry Period | tRTY | 0.8 | 1 | 1.35 | s |  | 6 |
| Fault Output Voltage | Vfault_lo |  |  | 0.45 | V | IOUT = 10mA | 6 |
| Fault Leakage | Ifault | -5 |  |  | µA |  | 6 |
| ENABLE/ENABLE Rising Threshold, VIN = 5V | Venr_5 | 1.5 | 1.8 | 2 | V | VIN = 5V | 6 |
| EN/EN Threshold Hysteresis, VIN = 5V | Hys_Venr_5 | 65 | 140 | 175 | mV | VIN = 5V | 6 |
| ENABLE/ENABLE Rising Threshold, VIN = 3.3V | Venr_3 | 1 | 1.3 | 1.6 | V | VIN = 3.3V | 6 |
| EN/EN Threshold Hysteresis, VIN = 3.3V | Hys_Venr_3 | 30 | 80 | 120 | mV | VIN = 3.3V | 6 |
| ENABLE/ENABLE Rising Threshold, VIN = 2.5V | Venr_2 | 0.95 | 1.1 | 1.3 | V | VIN = 2.5V | 6 |
| EN/EN Threshold Hysteresis, VIN = 2.5V | Hys_Venr_2 | 10 | 70 | 110 | mV | VIN = 2.5V | 6 |
| ENABLE Pull-Down Resistor | Ren_h | 0.6 | 1 | 1.55 | MΩ | Enable asserted high options | 7 |
| ENABLE Pull-Up Resistor | Ren_l | 0.6 | 1 | 1.55 | MΩ | Enable asserted low options | 7 |
| Enabled VIN Current | IVDD |  | 57 | 75 | µA | Switches Closed, OUTPUT = OPEN | 7 |
| Disabled VIN Current | IVDD |  | 3.5 | 5.5 | µA | Switches Open, OUTPUT = OPEN | 7 |
| Rising POR Threshold | VUVLO |  | 2.1 | 2.3 | V | VIN Rising to functional operation | 7 |
| Reverse Blocking Leakage Current | IVR |  | 0.3 | 2 | µA | VIN = 0V, VOUT = 5V | 7 |
| Supply Voltage Range |  | 2.5 |  | 5.5 | V | Operating conditions (datasheet prints 'Typical') | 5 |
| Industrial Temperature Range |  | -40 |  | 85 | °C | Industrial grade (ISL61861BIBZ, -40 to +85°C) | 5 |
| OUT Voltage | OUT | -0.3 |  |  | V | Relative to GND; upper limit printed as VIN 0.3V | 5 |
| Output Current |  |  |  | 5 | A | Short circuit protected; limited to 5A | 5 |
| ESD Human Body Model |  |  |  | 3 | kV | Per MIL-STD-883 Method 3015.7 | 5 |
| ESD Machine Model |  |  |  | 300 | V | Per MIL-STD-883 Method 3015.7 | 5 |
| Latch Up |  |  |  | 100 | mA | Tested per JESD-78B; Class 2, Level A | 5 |
| Maximum Junction Temperature | TJ |  |  | 150 | °C |  | 5 |
| Maximum Storage Temperature Range |  | -65 |  | 150 | °C |  | 5 |
| Thermal Resistance, 8 Lead SOIC Package (junction-to-ambient) | JA |  | 120 |  | °C/W | Note 4: measured on high effective thermal conductivity test board in free air | 5 |

## CAD (KiCad official)

- Symbol: `ISL61861BIBZ`
- Footprint: `Package_SO:SOIC-8_3.9x4.9mm_P1.27mm`
- 3D model: SOIC-8 (KiCad packages3D, STEP)
- 3D model files: `isl61861bibz-etched.step` / `isl61861bibz-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `isl61861bibz.step` / `isl61861bibz.glb` are the bare package body.

## Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

- **Datasheet:** [RENESAS datasheet](docs/isl61861bibz-datasheet.pdf) (18 pp, sha256 `2e974089a9b0fae1`, retrieved 2026-10-30, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-haiku-5-5` (text), consensus `claude-sonnet-5-5` (agreed), guards: pin_guards 0.1: passed. Pins are checked against the footprint pad set and their cited datasheet pages before publish.
- **CAD:** KiCad official libraries (CC-BY-SA 4.0).

[Datasheet PDF](docs/isl61861bibz-datasheet.pdf)