ISL9122A Datasheet | Renesas

Features an extremely low quiescent current consumption of 1300n A in Regulation mode, 120n A in Forced Bypass mode, and 8n A in Shutdown mode. It supports input voltages from 1.8V to 5.5V. The ISL9122A has automatic bypass functionality for situations in which the input voltage is close to the output voltage, and it automatically transitions between Buck and Boost modes without significant output disturbance. In addition to the automatic bypass functionality, the Forced Bypass power saving mode can be chosen if voltage regulation is not required. Forced Bypass power saving mode is accessible using the I2C interface bus. The ISL9122A is capable of delivering up to 500m A of output current (VIN > VOUT > 2.5V) and provides excellent efficiency because of its adaptive frequency hysteretic control architecture. The ISL9122A is designed for stand-alone applications and supports a default output voltage at Power-On Reset (POR). After POR, the output voltage can be adjusted in the range of 1.8V to 5.375V by using the I2C interface bus. Specific default output voltages are available upon request. The ISL9122A requires only a single EIA 0603 size inductor and a minimum of two external capacitors. Power supply solution size is minimized by a 1.8mm×1.0mm 8 Bump WLCSP and it is also available in a 3.0mm×2.0mm 8 Ld plastic DFN. L1 1µH/0603 LX1 LX2 VOUT C1 10µF/0603 I2C Host C2 22µF/0603 Enable Disable Figure 1. Typical Application (Minimum De-rated C2 = 6µF) Features - 1300n A quiescent current - 84% efficiency at 10µA load (VIN = 3.6V, VOUT = 3.3V) - 97% peak efficiency (VIN = 3.6V, VOUT = 3.3V) - Input voltage range: 1.8V to 5.5V - Output voltage range: 1.8V to 5.375V - Output current: up to 500m A (VIN > VOUT > 2.5V) - Selectable Forced and Auto Bypass power saving modes - Seamless PWM/PFM and buck/boost transition - I2C control and voltage adjustability - Hysteretic controller - Small 1.8mm×1.0mm 8 Bump WLCSP and 3.0mm×2.0mm 8 Ld DFN...