DATASHEET
Compact High Efficiency Low Power Buck-Boost
Regulator
ISL9120IR
Features
The ISL9120IR is a highly integrated buck-boost switching
regulator that accepts input voltages either above or below the
regulated output voltage. This regulator automatically transitions
between buck and boost modes without significant output
disturbance. The ISL9120IR also has automatic bypass
functionality for when the input voltage is generally within 1% to
2% of the output voltage, there will be a direct bypass connection
between the VIN and VOUT pins. In addition to the automatic
bypass functionality, the ISL9120IR also has a forced bypass
functionality with the use of the BYPS pin.
• Accepts input voltages above or below regulated output
voltage
• Automatic bypass mode functionality
• Automatic and seamless transitions between buck and boost
modes
• Input voltage range: 1.8V to 5.5V
• Selectable forced bypass power saving mode
• Adaptive multilevel current limit scheme to optimize efficiency
at low and high currents
This device is capable of delivering up to 800mA of output
• Output current: up to 800mA (V = 2.5V, V
IN
= 3.3V)
OUT
current (V = 2.5V, V
= 3.3V) and provides excellent
IN OUT
efficiency due to its adaptive current limit pulse frequency
modulation (PFM) control architecture.
• High efficiency: up to 98%
• 41µA quiescent current maximizes light-load efficiency
• Fully protected for over-temperature and undervoltage
• Small 3mmx3mm 12 Ld TQFN package
The ISL9120IR is designed for stand-alone applications and
supports a 3.3V fixed output voltage or variable output voltages
with an external resistor divider. The forced bypass power saving
mode can be chosen if voltage regulation is not required. The
device consumes less than 3.5µA of current over the operating
temperature range in the forced bypass mode.
Applications
• Smartphones and tablets
The ISL9120IR requires only a single inductor and very few
external components. Power supply solution size is minimized by
a 3mmx3mm 12 Ld TQFN package.
• Portable consumer and wearable devices
100
VIN
=
ISL9120IRNZ
1.8V TO 5.5V
V
= 3.6V
IN
95
90
85
80
75
70
VIN
LX1
C
1
L
1
10µF
1µH
LX2
VOUT
V
= 4V
IN
ENABLE
DISABLE
V
= 2.5V
IN
EN
VOUT = 3.3V
V
= 3.4V
IN
V
= 3V
IN
C
2
BYPASS
BUCK-BOOST
FB
BYPS
22µF or 47µF
1
10
100
1000
OUTPUT CURRENT (mA)
FIGURE 1. TYPICAL FIXED OUTPUT APPLICATION
FIGURE 2. EFFICIENCY: V
OUT
= 3.3V, T = +25°C
A
February 2, 2016
FN8743.1
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1-888-INTERSIL or 1-888-468-3774 | Copyright Intersil Americas LLC 2015, 2016. All Rights Reserved
Intersil (and design) is a trademark owned by Intersil Corporation or one of its subsidiaries.
All other trademarks mentioned are the property of their respective owners.
1
5秒后页面跳转
STM32H743技术深度剖析与应用案例探索
LM321中文资料解析：引脚功能介绍、技术特点、技术特性分析
74HC14芯片资料介绍：性能特性分析、引脚介绍
LM1875芯片手册：功放参数分析、引脚说明、电路设计要点
微信公众号
抖音公众号
浙公网安备 33010502006866号 浙ICP备10014259号-119
营业执照ICP证
数据手册
如果您发现信息不准确，
