参数资料
型号: MIC2155YML TR
厂商: Micrel Inc
文件页数: 1/35页
文件大小: 0K
描述: IC REG CTRLR BUCK PWM VM 32MLF
特色产品: MIC2155/6 Buck Control IC
标准包装: 1
PWM 型: 电压模式
输出数: 1
频率 - 最大: 550kHz
占空比: 80%
电源电压: 4.5 V ~ 14.5 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: 32-VFQFN 裸露焊盘,32-MLF?
包装: 标准包装
产品目录页面: 1091 (CN2011-ZH PDF)
其它名称: 576-3527-6
MIC2155/2156
Two-Phase, Single-Output, PWM
Synchronous Buck Control IC
General Description
The MIC2155 and MIC2156 are a family of two-phase,
single-output synchronous buck control ICs featuring small
size, high efficiency, and a high level of flexibility. The ICs
implement a 500kHz (MIC2155) and 300kHz (MIC2156)
voltage mode PWM control, with the outputs switching
180 ° out of phase. The result of the out-of-phase operation
is 1MHz (or 600kHz) input ripple with ripple current
cancellation, minimizing the required input filter
capacitance. A 1% output voltage tolerance allows the
maximum level of system performance. Internal drivers
with adaptive gate drive allow the highest efficiency with
the minimum external components.
Two independent enable pins and a power good output
are provided, allowing a high level of control and
sequencing capability.
The MIC215x family has a junction operating range from
-40 ° C to +125 ° C.
Data sheets and support documentation can be found on
Micrel’s web site at www.micrel.com.
Features
? Synchronous buck control ICs with outputs switching
180 ° out-of-phase
? Remote sensing with internal differential amplifier
? 4.5V to 14.5V input voltage range
? Adjustable output voltages down to 0.7V
? 1% output voltage accuracy
? Starts up into a pre-biased output
? 500kHz PWM operation (MIC2155)
? 300kHz PWM operation (MIC2156)
? Adaptive gate drive allows efficiencies over 95%
? Adjustable current limit with no sense resistor
? Senses low-side MOSFET current
? Internal drivers allow 25A per phase
? Power Good output allow simple sequencing
? Dual enables with micro-power shutdown and UVLO
? Programmable soft-start pin
? Output over-voltage protection
? Works with ceramic output capacitors
? Multi-input supply capability
? Single-output high-current capability with master/slave
current sharing
? External synchronization
? Small footprint 32-pin 5mm × 5mm MLF ?
? Junction temperature range of -40 ° C to +125 ° C
Applications
?
?
?
?
?
Multi-output power supplies with sequencing
DSP, FPGA, CPU and ASIC power supplies
DSL modems
Telecom and networking equipment
Servers
MLF and Micro Lead Frame are registered trademarks of Amkor Technologies
Micrel Inc. ? 2180 Fortune Drive ? San Jose, CA 95131 ? USA ? tel +1 (408) 944-0800 ? fax + 1 (408) 474-1000 ? http://www.micrel.com
November 2009
M9999-111209-B
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