ISL911xx Family of Buck-Boost/Boost Regulators

The ISL911xx buck-boost regulator family is capable of working with the ultra-small inductors and capacitors to fit within less than 14mm2 board footprint, making them the ideal 2A switching converter solution for space-constrained mobile devices. The advanced wafer-level CSP package requires only a single inductor and very few external components, which minimizes overall space requirements. The ISL911xx regulators’ 2.5MHz switching frequency further reduces the power supply solution size.

Buck-Boost Regulators

ISL91106, ISL91107 and ISL91108 are highly-integrated buck-boost switching regulators that accept input voltages either above or below the regulated output voltage. Unlike other buck-boost regulators, these regulators automatically transition between operating modes without significant output disturbance.

The ISL91110 is a high-current buck-boost switching regulator for systems using new battery chemistries. It uses Intersil’s 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 and ISL91128 high efficiency buck-boost regulators feature 4.5A switches, best-in-class efficiency up to 96%, and a compact footprint ideal for providing system power or powering the peripherals in battery-operated devices.

Part Description Output Current Package (mm)
ISL91106 High Efficiency Buck-Boost Regulator with 3.8A Switches and Bypass Mode up to 2A
(PVIN = 2.8V, VOUT= 3.3V)
2.15x1.51 WLCSP
ISL91106A High Efficiency Buck-Boost Regulator with 4.2A Switches and Bypass Mode up to 2.1A
(PVIN = 2.8V, VOUT= 3.3V)
2.15x1.51 WLCSP
ISL91107 High Efficiency Buck-Boost Regulator with 3.8A Switches up to 2A
(PVIN = 2.8V, VOUT= 3.3V)
2.15x1.51 WLCSP
ISL91107IR High Efficiency Buck-Boost Regulator with 4.1A Switches up to 2A
(PVIN = 2.8V, VOUT= 3.3V)
3x4 20 Ld TQFN
ISL91108 High Efficiency Buck-Boost Regulator with 4.2A Switches up to 2.7A
(PVIN = 3V, VOUT = 3.3V)
2.34x1.72 WLCSP
ISL91110 High Efficiency Buck-Boost Regulator with 4.5A Switches up to 2A
(PVIN = 2.5V, VOUT= 3.3V)
2.33x2.07 WLCSP
ISL91110IR High Efficiency Buck-Boost Regulator with 5.4A Switches up to 2A
(PVIN = 2.5V, VOUT= 3.3V)
(PVIN = 3.4V, VOUT = 5V)
4x4 20 Ld TQFN
ISL91127 High Efficiency Buck-Boost Regulator with 4.5A Switches up to 2.1A
(PVIN = 2.5V, VOUT= 3.3V)
2.15x1.74 WLCSP
ISL91127IR High Efficiency Buck-Boost Regulator with 4.5A Switches up to 2A
(PVIN = 2.5V, VOUT= 3.3V)
4x4 20 Ld TQFN
ISL91128 High Efficiency Buck-Boost Regulator with 4.5A Switches and I2C Interface up to 2.4A
(PVIN = 2.5V, VOUT= 3.3V)
2.15x1.74 WLCSP
Boost Regulators

The ISL91132, ISL91133 and ISL91134 are integrated boost switching regulators for battery powered applications. These devices provide a power supply solution for products using a one cell Li-ion or Li-polymer battery.

ISL91117 is a highly-integrated boost switching regulator for battery powered applications. The device provides a power supply solution for products using dual-cell or three-cell alkaline, NiCd or NiMH, or one-cell Li-ion or Li-polymer battery.

Part Description Output Voltage Package (mm)
ISL91117 High Efficiency Synchronous Boost Converter with 4.2A Switches and Output Disconnect 1 fixed output voltage of 5V 2.34 x 1.72WLCSP
ISL91132 High Efficiency 1.8A Boost Regulator with Input-to-Output Bypass 6 fixed output voltages
ranging from 3.15V to 5V
1.78x1.78 WLCSP
ISL91133 High Efficiency 2.3A Boost Regulator with Input-to-Output Bypass 6 fixed output voltages
ranging from 3.15V to 5V
1.78x1.78 WLCSP
ISL91134 High Efficiency 1.8A Boost Regulator with Input-to-Output Bypass 1 fixed output voltage of 5V 1.78x1.78 WLCSP