参数资料
型号: MIC2199YML TR
厂商: Micrel Inc
文件页数: 1/14页
文件大小: 0K
描述: IC REG CTRLR BUCK PWM CM 12-MLF
标准包装: 1
PWM 型: 电流模式
输出数: 1
频率 - 最大: 330kHz
占空比: 85%
电源电压: 4.5 V ~ 32 V
降压:
升压:
回扫:
反相:
倍增器:
除法器:
Cuk:
隔离:
工作温度: -40°C ~ 125°C
封装/外壳: 12-VFDFN 裸露焊盘,12-MLF?
包装: 标准包装
产品目录页面: 1092 (CN2011-ZH PDF)
其它名称: 576-1718-6
V IN
Micrel, Inc.
General Description
The MIC2199 is a high-power 300kHz synchronous buck
DC-to-DC controller housed in a small 4mm × 4mm MLF?
12-pin package. The MIC2199 operates from a wide 4.5V
to 32V input and can be programmed for output voltages
from 0.8V to 6V. The wide input voltage capability makes
the MIC2199 an ideal solution for point-of-load DC-to-DC
conversion in 5V, 12V, 24V, and 28V systems.
The 300kHz switching frequency allows the use of a small
inductor and small output capacitors. The current mode PWM
control along with the external COMP pin allows for ease of
stability compensation and fast transient response across a
wide range of applications.
An all N-Channel synchronous architecture and powerful
output drivers allow up to 20A of output current capability.
For smaller external components, refer to the 500kHz
MIC2198.
The MIC2199 is available in a 12-pin 4mm × 4mm MLF?
package with a junction temperature range from –40°C to
125°C.
Typical Application
4.5V to 24V
MIC2199
MIC2199
300kHz 4mm × 4mm Synchronous Buck Converter
Features
?  4.5V to 32V input range
?  4mm  × 4mm MLF? package
?  300kHz PWM operation
?  95% efficiency
?  Output voltage adjustable down to 0.8V
?  20A output current capability
?  Drives all N-Channel MOSFETs
?  Logic controlled micropower shutdown 
?  Cycle-by-cycle current limiting
?  Adjustable undervoltage lockout
?  Frequency foldback overcurrent protection
Applications
?  Point-of-load DC-to-DC conversion from 5V, 12V, 
24V, 28V supplies
?  Telecom equipment
?  Wireless modems
?  Servers
?  Base stations
U1 MIC2199BML
SD103BWS
100.0
22μF
VIN
VDD
4.7μF
EN/UVLO
BST
HSD
VSW
0.1μF
IRF7821
2μH
0.01?
V OUT
3.3V/7A
95.0
LSD
IRF7821
220μF
0
2k?
COMP
GND
CSH
VOUT
FB
1nF
10k?
6.04k?
90.0
85.0
2
4
V OUT = 3.3V
6
8
2.2nF
4.5V–24V to 3.3V/7A Converter
I LOAD (A)
Efficiency for
V IN = 5V and V OUT = 3.3V
MLF and Micro LeadFrame are registered trademarks of Amkor Technology, Inc.
Micrel, Inc. ? 2180 Fortune Drive ? San Jose, CA 95131 ? USA ? tel + 1 (408) 944-0800 ? fax + 1 (408) 474-1000 ? http://www.micrel.com
January 2010
1
M9999-011310
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