Renesas Electronics ISL91133 Switching Voltage Regulator
Renesas Electronics ISL91133 Switching Voltage Regulator is an integrated boost switching regulator for battery-powered applications. The ISL91133 provides a power supply solution for products using a one-cell Li-ion or Li-polymer battery. The device can deliver up to 2.3A output current, an input voltage of 2.5V, and an output voltage of 3.3V. The No-Load quiescent current is only 108μA in Boost Mode and 45μA in Forced Bypass Mode, significantly reducing standby consumption.
The ISL91133 offers a Bypass Mode operation where the output is directly connected to the input through a 38mΩ MOSFET to allow a significantly lower dropout voltage. The Bypass Mode can be entered by an external command or auto bypass. The Forced Bypass Mode allows the output voltage to operate close to the input voltage and improves the efficiency under these conditions.
The ISL91133 is designed to support six fixed output voltages ranging from 3.15V to 5.0V. A voltage select pin is available for each output variant to scale up the output voltage by a small offset to compensate for the transient load droop.
The ISL91133 requires only an inductor and a few external components to operate. The 2.5MHz switching frequency further reduces the size of external components.
The ISL91133 is offered in a 16-bump, 0.4mm pitch, 1.78mm x 1.78mm Wafer Level Chip Scale Package (WLCSP), ideal for space-constrained applications.
Features
- Boost topology
- 2.1MHz to 2.9MHz switching frequency range
- 2.35V to 5.4V input voltage range (VIN)
- Up to 2.3A (VIN = 2.5V, VOUT = 3.3V) output current
- Burst current up to 2.5A (VIN = 2.5V, VOUT = 3.3V, tON <600µs, T = 4.6ms)
- Up to 96% high efficiency
- 108µA quiescent current minimizes standby consumption in Boost Mode, 45µA in Forced Bypass Mode
- 2.5MHz switching frequency minimizes the external component size
- Forced Bypass or Auto Bypass Modes with a 38mΩ switch
- PFM mode at light load currents
- Fully protected from overcurrent, over-temperature, and undervoltage
- Load disconnect when disabled
- -40°C to +85°C operating temperature range
- +125°C maximum junction temperature
- Compact 1.78mm x 1.78mm WLCSP
- Pb-free
- RoHS compliant
Applications
- Smartphones and tablet PCs
- Wireless communication devices
- 2G/3G/4G RF power amplifiers
- USB OTG power source
Development Tools
Renesas Electronics ISL91133IIx-EVZ Evaluation Boards
Demonstration and evaluation platform for the ISL91133 Switching Voltage Regulators.
Block Diagram
Typical Application Circuit
