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| 型号： | MIC2185BQS |
| 厂商： | Micrel Inc |
| 文件页数： | 1/15页 |
| 文件大小： | 0K |
| 描述： | IC REG CTRLR BST PWM CM 16-QSOP |
| 标准包装： | 98 |
| PWM 型： | 电流模式 |
| 输出数： | 1 |
| 频率 - 最大： | 440kHz |
| 占空比： | 95% |
| 电源电压： | 2.9 V ~ 14 V |
| 降压： | 无 |
| 升压： | 是 |
| 回扫： | 无 |
| 反相： | 无 |
| 倍增器： | 无 |
| 除法器： | 无 |
| Cuk： | 无 |
| 隔离： | 无 |
| 工作温度： | -40°C ~ 125°C |
| 封装/外壳： | 16-SSOP（0.154"，3.90mm 宽） |
| 包装： | 管件 |
MIC2185
General Description
Micrel’s MIC2185 is a high ef?ciency synchronous boost
PWM control IC. With its wide input voltage range of 2.9V to
14V, the MIC2185 can be used to ef?ciently boost voltages
in 1- or 2-cell Li Ion battery powered applications, as well as
?xed 3.3V and 5V systems. Its powerful 5Ω output drivers
allow the MIC2185 to supply large output currents with the
selection of the proper external MOSFETs.
With it’s ?xed frequency PWM architecture, and easily
synchronized drive, the MIC2185 is ideal for noise-sensi-
tive telecommunications applications. The nominal 400kHz
operating frequency of the MIC2185 can be divided by two,
allowing the device to be externally synchronized to frequen-
cies below 400kHz.
The MIC2185 also features a low current shutdown mode
and a programmable undervoltage lockout. A skipped pulse
mode of operation can be manually set to achieve higher
ef?ciencies at light load conditions.
The MIC2185 is available in a 16 pin SOIC package and 16
pin QSOP package with an ambient temperature operating
range from –40°C to 85°C.
Ordering Information
Micrel, Inc.
MIC2185
Low Voltage Synchronous Boost PWM Control IC
Features
? Input voltage range: 2.9V to 14V
? 95% ef?ciency
? Oscillator frequency of 200kHz/400kHz
? Frequency sync to 600kHz
? 0.5μA shutdown current
? Two 5Ω output drivers
? Front edge blanking
? PWM current mode control
? Cycle-by-cycle current limiting
? Frequency foldback protection
? Adjustable under-voltage lockout
? Precision 1.245V reference output
? 16 pin SOIC narrow body package
Applications
? 3.3V to 5V conversion in telecom systems
? Satellite phones
? Cable modems
? 1-and 2-cell Li Ion battery operated equipment
Standard
Part Number
Pb-Free
Frequency
Voltage
Junction
Temp. Range
Package
Typical Application
V IN = 3.3V
MIC2185BM
MIC2185BQS
2.4μH
MIC2185YM
MIC2185YQS
Si9803DY (x2)
200/400kHz
200/400kHz
Adj
Adj
V OUT = 5V
–40oC to +125oC
–40oC to +125oC
16-pin SOIC
16-pin QSOP
C IN
1
7
VINA
EN/UVLO
OUTP
VINP
14
16
C OUT
15
10
4
FREQ/2
VDD
COMP
MIC2185
FB
OUTN
6
13
Si4884DY (x2)
100
95
5V Output Efficiency
8
11
VREF
SYNC
CSH
9
8m
90
85
0
2
SKIP
SS
3
PGND
SGND
5
12
80
75
70
V IN = 3.3V
200kHz P WM
1 2 3 4 5
OUTPUT CURRENT (A)
Adjustable Output Synchronous Boost Converter
Micrel, Inc. ? 2180 Fortune Drive ? San Jose, CA 95131 ? USA ? tel + 1 (408) 944-0800 ? fax + 1 (408) 474-1000 ? http://www.micrel.com
October 2005
1
MIC2185
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MIC2185BQS TR | 功能描述:IC REG CTRLR BST PWM CM 16-QSOP RoHS:否 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 切换控制器 系列:- 标准包装:4,000 系列:- PWM 型:电压模式 输出数:1 频率 - 最大:1.5MHz 占空比:66.7% 电源电压:4.75 V ~ 5.25 V 降压:是 升压:无 回扫:无 反相:无 倍增器:无 除法器:无 Cuk:无 隔离:无 工作温度:-40°C ~ 85°C 封装/外壳:40-VFQFN 裸露焊盘 包装:带卷 (TR) |
| MIC2185YM | 功能描述:DC/DC 开关控制器 SO-16 Low Vin Synchronous Buck PWM Control IC (Lead Free) RoHS:否 制造商:Texas Instruments 输入电压:6 V to 100 V 开关频率: 输出电压:1.215 V to 80 V 输出电流:3.5 A 输出端数量:1 最大工作温度:+ 125 C 安装风格: 封装 / 箱体:CPAK |
| MIC2185YM TR | 功能描述:DC/DC 开关控制器 SO-16 Low Vin Synchronous Buck PWM Control IC (Lead Free) RoHS:否 制造商:Texas Instruments 输入电压:6 V to 100 V 开关频率: 输出电压:1.215 V to 80 V 输出电流:3.5 A 输出端数量:1 最大工作温度:+ 125 C 安装风格: 封装 / 箱体:CPAK |
| MIC2185YQS | 功能描述:DC/DC 开关控制器 SO-16 Low Vin Synchronous Buck PWM Control IC (Lead Free) RoHS:否 制造商:Texas Instruments 输入电压:6 V to 100 V 开关频率: 输出电压:1.215 V to 80 V 输出电流:3.5 A 输出端数量:1 最大工作温度:+ 125 C 安装风格: 封装 / 箱体:CPAK |
| MIC2185YQS TR | 功能描述:DC/DC 开关控制器 SO-16 Low Vin Synchronous Buck PWM Control IC (Lead Free) RoHS:否 制造商:Texas Instruments 输入电压:6 V to 100 V 开关频率: 输出电压:1.215 V to 80 V 输出电流:3.5 A 输出端数量:1 最大工作温度:+ 125 C 安装风格: 封装 / 箱体:CPAK |
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