参数资料
型号: MIC2204BML TR
厂商: Micrel Inc
文件页数: 7/11页
文件大小: 0K
描述: IC REG BUCK SYNC ADJ 0.6A 10MLF
标准包装: 5,000
类型: 降压(降压)
输出类型: 可调式
输出数: 1
输出电压: 可调至 1V
输入电压: 2.3 V ~ 5.5 V
PWM 型: 电压模式
频率 - 开关: 2MHz
电流 - 输出: 600mA
同步整流器:
工作温度: -40°C ~ 125°C
安装类型: 表面贴装
封装/外壳: 10-VFDFN 裸露焊盘,10-MLF?
包装: 带卷 (TR)
供应商设备封装: 10-MLF?(3x3)
其它名称: MIC2204BMLTR
MIC2204
Functional Description
VIN
VIN provides power to the output and to the internal bias
supply. The supply voltage range is from 2.3V to 5.5V. A
minimum 1 μ F ceramic is recommended for bypassing the
input supply.
Enable
The enable pin provides a logic level control of the output. In
the off state, supply current of the device is greatly reduced
(typically 6.5 μ A). Also, in the off state, the output drive is
placed in a “tri-stated” condition, where both the high-side
P-Channel MOSFET and the low-side N-Channel are in an off
or non-conducting state. Do not drive the enable pin above
the supply voltage.
SYNC_IN
SYNC_IN enables the ability to change the fundamental
switching frequency. The SYNC_IN frequency has a mini-
mum frequency of 1.8MHz and a maximum sync frequency
Micrel, Inc.
SYNC_OUT
Since SYNC_OUT is an open collector output that provides
a signal equal to the internal oscillator frequency, multiple
MIC2204s to be connected together in a master-slave con-
figuration for frequency matching of the converters. A typical
10k ? is recommended for a pull-up resistor.
BIAS
The bias supply is an internal 2.3V linear regulator that
supplies the internal biasing voltage to the MIC2204. A 10nF
ceramic capacitor is required on this pin for bypassing. Do not
use the BIAS pin as a supply. The BIAS pin was designed to
supply internal power and not external circuitry.
Feedback
The feedback pin provides the control path to control the
output. A resistor divider connecting the feedback to the
output is used to adjust the desired output voltage. Refer to
the “Feedback” material in the “ Applications Information”
section for more detail.
of 2.5MHz.
Careful attention should be paid to not driving the SYNC_IN
pin greater than the supply voltage. While this will not damage
the device, it will cause improper operation.
MIC2204
“Master”
10k ?
VIN
SW
BIAS
SYNC_IN
SYNC_OUT
FB
MIC2204
“Slave”
VIN
SW
BIAS
SYNC_IN
SYNC_OUT
FB
Figure 1. SYNC_OUT
April 2005
7
M9999-042205
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