Overview
Description
The ISL91107IR is a highly integrated buck-boost switching regulator that accepts input voltages either above or below the regulated output voltage. Unlike other buck-boost regulators, this regulator automatically transitions between operating modes without significant output disturbance.
This device is capable of delivering up to 2A of output current (PVIN = 2.8V, VOUT = 3.3V) and provides excellent efficiency due to its fully synchronous 4-switch architecture. A no-load quiescent current of only 45µA also optimizes efficiency under light load conditions.
The ISL91107IR is designed for standalone applications and supports 3.3V fixed output voltages or variable output voltages with an external resistor divider. Output voltages as low as 1V or as high as 5.2V are supported using an external resistor divider.
The ISL91107IR requires only a single inductor and very few external components. A power supply solution size is minimized by its 2.5MHz switching frequency, which further reduces the size of external components. The ISL91107IR is available in a 3mm x 4mm 20 Ld TQFN package. Alternatively, the ISL91107 is available in a 2.15mm x 1.51mm WLCSP package.
Features
- Accepts input voltages above or below regulated output voltage
- Automatic and seamless transitions between buck and boost modes
- Input voltage range: 1.8V to 5.5V
- Output current: up to 2A (PVIN = 2.8V, VOUT = 3.3V)
- High efficiency: up to 96%
- 45µA quiescent current maximizes light load efficiency
- 2.5MHz switching frequency minimizes the external component size
- Selectable forced PWM mode
- Fully protected from short-circuit, over-temperature, and undervoltage
- Small 3mm x 4mm TQFN package
Comparison
Applications
Documentation
Featured Documentation
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| Type | Title | Date |
| Datasheet | PDF 858 KB | |
| Application Note | PDF 509 KB | |
| Application Note | PDF 397 KB | |
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Design & Development
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ISL91107IRTNZ-T7A
hi, Iam Using ISL91107IRTNZ-T7A converter for converting Vbat voltage (2.7 to 4.2V) to 3.3V output. I have used an charger IC to charge the 1s1p lipo battery. When the battery is deeply discharged and enters to the shutdown mode, the charger could not able to charge ...
Feb 27, 2025 -
ISL91107IRTNZ-T7A
hi, Iam Using ISL91107IRTNZ-T7A converter for converting Vbat voltage (2.7 to 4.2V) to 3.3V output. I have used an charger IC to charge the 1s1p lipo battery. When the battery is deeply discharged and enters to the shutdown mode, the charger could not able to charge ...
Feb 27, 2025