ISL91107
ISL91107 is High Efficiency Buck-Boost Regulator manufactured by Renesas.
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 external ponent size
- Selectable forced PWM mode
- Fully protected for short-circuit, over-temperature and undervoltage
- Small 2.15mmx1.51mm WLCSP
Applications
- Smartphones and tablet PCs
- Wireless munication devices
- 2G/3G/4G power amplifiers
VIN = 1.8V TO 5.5V
C1 22µF
ISL91107IIAZ
PVIN
LX1
VIN MODE EN
LX2 VOUT
GND PGND
L1 1µH
R1 187k R2 60.4k
VOUT = 3.3V
C4 22p F
C2 2x22µF
FIGURE 1. TYPICAL APPLICATION
EFFICIENCY (%)
100 VIN = 3.8V
VIN = 4.2V
VIN = 3.3V
85 VIN = 2.5V
70...
