ISL91127
ISL91127 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
- Continuous output current: up to 2.1A (PVIN = 2.5V,
VOUT = 3.3V)
- High efficiency: up to 96%
- 30µA quiescent current maximizes light-load efficiency
- 2.5MHz switching frequency minimizes external ponent size
- Fully protected for short-circuit, over-temperature, and undervoltage
- Small 2.15mmx1.74mm WLCSP
Applications
- Brownout-free system voltage for smartphones and tablet PCs
- Wireless munication devices
- 2G/3G/4G RF power amplifiers
ISL91127IINZ
VIN = 1.8V TO 5.5V C1
PVIN
LX1
10µF
VIN EN MODE
LX2 VOUT
SGND PGND
L1 1µH
VOUT = 3.3V C2 2x22µF
FIGURE 1. TYPICAL APPLICATION: VOUT = 3.3V
EFFICIENCY (%)
100 95 90 85 80 75 1
VIN = 3.6V
VIN = 4V
VIN = 3.3V VIN = 3V
VIN = 2.5V
LOAD CURREN T (m A)
FIGURE 2. EFFICIENCY: VOUT = 3.3V
100 0
FN8418 Rev 5.01 Aug 26, 2022
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