朝图微电子产品选型资料
需积分: 0 61 浏览量
2024-01-15
16:59:48
上传
评论
收藏 849KB PDF 举报
5.5V 3A 1.2MHz Synchronous Step-Down Regulato
ZT3432
r
Features
• 2.7V to 5.5V Input Voltage Range
• 3A Continuous Output Current
• 1.2MHz Switching Frequency
• Built-in Short Protection
• Built-in Over Current Limit
• Built-in Over Voltage Protection
• PFM Mode for High Efficiency in Light Load
• High Efficiency: Up to 96%
• Internal Soft-Start
• Output Adjustable from 0.6V
• Over Temperature Protected
• Low Quiescent Current: 40μA
• Available in DFN3*3- 10 package
• -40°C to +85°C Temperature Range
Applications
• Cellular and Smart Phones
• Wireless and DSL Modems
• PDAs
General Description
• Portable Instruments
• Digital Still and Video Cameras
• PC Cards
The ZT3432 is a high-efficiency monolithic synchronous buck regulator using a constant frequency, current mode
architecture. The device is available in an adjustable version. The 2.7V to 5.5V input voltage range makes the
ZT3432 ideally suited for single Li-Ion battery powered applications. 100% duty cycle provides low dropout
operation, extending battery life in portable systems. PWM/PFM mode operation provides very low output ripple
voltage for noise sensitive applications. Switching frequency is internally set at 1.2MHz, allowing the use of small
surface mount inductors and capacitors. Low output voltages are easily supported with the 0.6V feedback reference
voltage.
The ZT3432 requires a minimal number of readily available, external components and is available in a space saving
DFN3*3- 10 package.
Typical Application Circuit
V
OUT
IN SW
NC NC
EN FB
GND
EPAD
Basic Application Circuit
ON/
OFF
C
OUT
C
f f
C
IN
V
IN
R
2
R
1
L
1
江苏朝图微电子有限公司
http://ztsoc.com/
江苏朝图微电子有限公司
1
剩余11页未读，继续阅读
资源评论
