Package Information
| CAD Model: | View CAD Model |
| Pkg. Type: | WLCSP-TKCURDL |
| Pkg. Code: | WNE |
| Lead Count (#): | 20 |
| Pkg. Dimensions (mm): | 2.15 x 1.74 x 0.50 |
| Pitch (mm): | 0.4 |
Environmental & Export Classifications
| Moisture Sensitivity Level (MSL) | 1 |
| Pb (Lead) Free | Yes |
| ECCN (US) | EAR99 |
| HTS (US) | 8542.39.0090 |
Product Attributes
| Lead Count (#) | 20 |
| Carrier Type | Reel |
| Moisture Sensitivity Level (MSL) | 1 |
| Pb (Lead) Free | Yes |
| Pb Free Category | Pb-Free Ball Terminal (SAC405)-e1 |
| Temp. Range (°C) | -40 to +85°C |
| Country of Assembly | TAIWAN |
| Country of Wafer Fabrication | TAIWAN |
| IQ [Rail 1] (µA) | 30 |
| Input Voltage (Max) (V) | 5.5 |
| Input Voltage (Max) [Rail 1] (V) | 5.5 - 5.5 |
| Input Voltage (Min) (V) | 1.8 |
| Input Voltage (Min) [Rail 1] (V) | 1.8 |
| Length (mm) | 2.1 |
| MOQ | 250 |
| Output Current (Max) [Rail 1] (A) | 3 |
| Output Voltage (Max) (V) | 5 |
| Output Voltage (Max) [Rail 1] (V) | 5 |
| Output Voltage (Min) (V) | 1.9 |
| Output Voltage (Min) [Rail 1] (V) | 1.9 |
| Outputs (#) | 1 |
| POR | Yes |
| Parametric Category | Buck-boost Regulators (Integrated FETs) |
| Peak Efficiency (%) | 96 |
| Pitch (mm) | 0.4 |
| Pkg. Dimensions (mm) | 2.1 x 1.7 x 0.50 |
| Pkg. Type | WLCSP-TKCURDL |
| Price (USD) | $1.41219 |
| Qualification Level | Standard |
| Quiescent Current | 30 µA |
| SYNCH Capability | No |
| Switching Frequency (KHz) | 2.9 - 2.9 |
| Switching Frequency Range (Typical) (kHz) | 2500 - 2500 |
| Thickness (mm) | 0.5 |
| Topology [Rail 1] | Buck-Boost |
| Width (mm) | 1.7 |
Resources for ISL91128
Description
The ISL91128 is a high-current, buck-boost switching regulator for systems using new battery chemistries. It uses the Renesas proprietary buck-boost algorithm to maintain voltage regulation while providing excellent efficiency and very low output voltage ripple when the input voltage is close to the output voltage. The device also includes a selectable Bypass mode for low power consumption in applications that have a Sleep or Low Power mode.
The ISL91128 is capable of delivering at least 2.2A continuous output current (VOUT = 3.3V) across a battery voltage range of 2.5V to 4.35V. This maximizes the energy utilization of advanced, single-cell Li-ion battery chemistries that have significant capacity left at voltages below the system voltage. Its fully synchronous low ON-resistance 4-switch architecture and a low quiescent current of only 30µA optimize efficiency under all load conditions.
The ISL91128 supports a broader set of programmable features that can be accessed using an I2C bus interface. With a programmable output voltage range of 1.9V to 5.0V, the ISL91128 is ideal for applications requiring dynamically changing supply voltages. A programmable slew rate can be selected to provide smooth transitions between output voltage settings.
The ISL91128 is available in a 20-bump, 0.4mm pitch WLCSP (2.15mm x 1.74mm) with a 2.5MHz switching frequency, which further reduces the size of external components.