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參數資料
| 型號： | MIC2185BQS |
| 廠商： | MICREL INC |
| 元件分類： | 穩壓器 |
| 英文描述： | Low Voltage Synchronous Boost PWM Control IC |
| 中文描述： | SWITCHING CONTROLLER, 440 kHz SWITCHING FREQ-MAX, PDSO16 |
| 封裝： | QSOP-16 |
| 文件頁數： | 1/15頁 |
| 文件大小： | 141K |
| 代理商： | MIC2185BQS |
May 2002
1
MIC2185
MIC2185
Micrel
MIC2185
Low Voltage Synchronous Boost PWM Control IC
Final Information
General Description
Micrel’s MIC2185 is a high efficiency synchronous boost
PWM control IC. With its wide input voltage range of 2.9V to
14V, the MIC2185 can be used to efficiently boost voltages in
1- or 2-cell Li Ion battery powered applications, as well as
fixed 3.3V and 5V systems. Its powerful 5
output drivers
allow the MIC2185 to supply large output currents with the
selection of the proper external MOSFETs.
With it’s fixed frequency PWM architecture, and easily syn-
chronized drive, the MIC2185 is ideal for noise-sensitive
telecommunications applications. The nominal 400kHz oper-
ating 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 efficien-
cies 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.
Typical Application
VINA
EN/UVLO
FREQ/2
VDD
COMP
VREF
SYNC
SKIP
SS
MIC2185
SGND
OUTP
VINP
FB
C
IN
C
OUT
V
OUT
= 5V
OUTN
CSH
V
IN
= 3.3V
PGND
5
12
9
13
6
16
14
3
2
11
8
4
10
15
7
1
Si9803DY (x2)
Si4884DY (x2)
2.4
μ
H
8m
70
75
80
85
90
95
100
0
1
2
3
4
5
E
OUTPUT CURRENT (A)
5V Output Efficiency
V
= 3.3V
200kHz PWM
Adjustable Output Synchronous Boost Converter
Features
Input voltage range: 2.9V to 14V
95% efficiency
Oscillator frequency of 200kHz/400kHz
Frequency sync to 600kHz
0.5
μ
A shutdown current
Two 5
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 and 16 pin QSOP
package
Applications
3.3V to 5V conversion in telecom systems
Satellite Phones
Cable Modems
1-and 2-cell Li Ion battery operated equipment
Micrel, Inc. 1849 Fortune Drive San Jose, CA 95131 USA tel + 1 (408) 944-0800 fax + 1 (408) 944-0970 http://www.micrel.com
Ordering Information
Part Number
MIC2185BM
MIC2185BQS
Frequency Voltage
200/400kHz
200/400kHz
Junction Temp. Range
–
40
°
C to +125
°
C
–
40
°
C to +125
°
C
Package
16-lead SOP
16-lead QSOP
Adj
Adj
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相關代理商/技術參數 |
參數描述 |
|---|---|
| MIC2185BQS TR | 功能描述:IC REG CTRLR BST PWM CM 16-QSOP RoHS:否 類別:集成電路 (IC) >> PMIC - 穩壓器 - DC DC 切換控制器 系列:- 標準包裝:4,000 系列:- PWM 型:電壓模式 輸出數:1 頻率 - 最大:1.5MHz 占空比:66.7% 電源電壓:4.75 V ~ 5.25 V 降壓:是 升壓:無 回掃:無 反相:無 倍增器:無 除法器:無 Cuk:無 隔離:無 工作溫度:-40°C ~ 85°C 封裝/外殼:40-VFQFN 裸露焊盤 包裝:帶卷 (TR) |
| MIC2185YM | 功能描述:DC/DC 開關控制器 SO-16 Low Vin Synchronous Buck PWM Control IC (Lead Free) RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開關頻率: 輸出電壓:1.215 V to 80 V 輸出電流:3.5 A 輸出端數量:1 最大工作溫度:+ 125 C 安裝風格: 封裝 / 箱體:CPAK |
| MIC2185YM TR | 功能描述:DC/DC 開關控制器 SO-16 Low Vin Synchronous Buck PWM Control IC (Lead Free) RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開關頻率: 輸出電壓:1.215 V to 80 V 輸出電流:3.5 A 輸出端數量:1 最大工作溫度:+ 125 C 安裝風格: 封裝 / 箱體:CPAK |
| MIC2185YQS | 功能描述:DC/DC 開關控制器 SO-16 Low Vin Synchronous Buck PWM Control IC (Lead Free) RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開關頻率: 輸出電壓:1.215 V to 80 V 輸出電流:3.5 A 輸出端數量:1 最大工作溫度:+ 125 C 安裝風格: 封裝 / 箱體:CPAK |
| MIC2185YQS TR | 功能描述:DC/DC 開關控制器 SO-16 Low Vin Synchronous Buck PWM Control IC (Lead Free) RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開關頻率: 輸出電壓:1.215 V to 80 V 輸出電流:3.5 A 輸出端數量:1 最大工作溫度:+ 125 C 安裝風格: 封裝 / 箱體:CPAK |
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