Renesas' ISL91127 is a high-current, buck-boost switching regulator for systems using battery chemistries. It uses 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 ISL91127 is capable of delivering at least 2.1 A continuous output current (VOUT = 3.3 V) over a battery voltage range of 2.5 V to 4.35 V. 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 30 µA optimizes efficiency under all load conditions.
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- Accepts input voltages above or below regulated output voltage
- Automatic and seamless transitions between buck and boost modes
- Input voltage range: 1.8 V to 5.5 V
- Continuous output current: up to 2.1 A (PVIN = 2.5 V, VOUT = 3.3 V)
- High efficiency: up to 96%
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- 30 µA quiescent current maximizes light-load efficiency
- 2.5 MHz switching frequency minimizes external component size
- Fully protected for short-circuit, over-temperature, and undervoltage
- Small, 2.15 mm x 1.74 mm WLCSP
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| Applications |
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- Brownout-free system voltage for smartphones and tablet PCs
- Wireless communication devices
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- 2G, 3G, and 4G RF power amplifiers
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Renesas' ISL91127 is a high-current, buck-boost switching regulator for systems using battery chemistries. It uses 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.
Hong Kong, China