Datasheet > ISL9122A

ISL9122A

更新时间： 2024-09-20 14:58:23

品牌	Logo	应用领域
瑞萨 - RENESAS		/
页数	文件大小	规格书
30页	893K
描述
Ultra-Low IQ Buck-Boost Regulator with Bypass

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ISL9122A 数据手册

Datasheet

ISL9122A

Ultra-Low I Buck-Boost Regulator With Bypass

The ISL9122A is a highly integrated non-inverting

buck-boost switching regulator that accepts input

voltages both above or below the regulated output

voltage. It features an extremely low quiescent

current consumption of 1300nA in Regulation mode,

120nA in Forced Bypass mode, and 8nA in Shutdown

mode. It supports input voltages from 1.8V to 5.5V.

Features

▪ 1300nA quiescent current

▪ 84% efficiency at 10µA load (V = 3.6V,

= 3.3V)

OUT

▪ 97% peak efficiency (V = 3.6V, V

= 3.3V)

OUT

▪ Input voltage range: 1.8V to 5.5V

▪ Output voltage range: 1.8V to 5.375V

▪ Output current: up to 500mA (V > V

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

> 2.5V)

OUT

▪ Selectable Forced and Auto Bypass power saving

modes

▪ Seamless PWM/PFM and buck/boost transition

▪ I C control and voltage adjustability

▪ Hysteretic controller

accessible using the I C interface bus.

▪ Small 1.8mm×1.0mm 8 Bump WLCSP and

3.0mm×2.0mm 8 Ld DFN packages

The ISL9122A is capable of delivering up to 500mA of

output current (V > V

> 2.5V) and provides

OUT

Applications

▪ Smart watches and wristband devices

excellent efficiency because of its adaptive frequency

hysteretic control architecture.

▪ Wireless earphones

The ISL9122A is designed for stand-alone

▪ Internet of Things (IoT) devices

▪ Water, gas, and oil meters

▪ Portable medical devices

▪ Hearing aid devices

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 I C 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.

100

L1 1µH/0603

LX1

LX2

VIN

VOUT

C₂

22µF/0603

C₁

10µF/0603

I²C Host

ISL9122A

SDA

SCL

Enable

Disable

VIN = 1.8V

VIN = 2.5V

VIN = 3.6V

VIN = 4.5V

VIN = 5.0V

VIN = 5.5V

GND

0.01

0.1

100

1000

Load Current (mA)

Figure 1. Typical Application (Minimum De-rated

C₂= 6µF)

Figure 2. Efficiency vs Load Current: V_OUT= 3.3V,

T_A= +25°C

FN8947 Rev.1.02

Oct 27, 2023

Page 1

12 3 4 5 6 7...30

中文翻译

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