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參數(shù)資料
| 型號： | MIC2183 |
| 廠商： | Micrel Semiconductor,Inc. |
| 英文描述： | Low Voltage Synchronous Buck PWM Control IC Final Information |
| 中文描述： | 低電壓同步降壓PWM控制IC決賽信息 |
| 文件頁數(shù)： | 1/12頁 |
| 文件大小： | 98K |
| 代理商： | MIC2183 |
December 10, 2001
1
MIC2183
MIC2183
Micrel
MIC2183
Low Voltage Synchronous Buck PWM Control IC
Final Information
General Description
Micrel’s MIC2183 is a high efficiency PWM synchronous
buck control IC. With its wide input voltage range of 2.9V to
14V, the MIC2183 can be used to efficiently step voltages
down in 1- or 2-cell Li Ion battery powered applications, as
well as in fixed 3.3V, 5V, or 12V systems.
Efficiencies over 90% are achievable over a wide range of
load conditions with the MIC2183’s PWM control scheme.
The operating frequency can be divided by two by raising the
FREQ/2 pin to V
DD
. This allows the user to optimize efficiency
versus board space. It also allows the MIC2183 to be exter-
nally synchronized to frequencies below its nominal 400KHz.
The MIC2183 features an oscillator output, FreqOut, which
can be used to implement a simple charge pump in low
voltage applications. The output of the charge pump can be
fed into the gate drive power circuitry via the V
IN
P pin. This
feature allows enhanced gate drive, hence higher efficiencies
at low input voltages.
MIC2183 also features a 1
μ
A shutdown mode, and a pro-
grammable undervoltage lockout, making it well-suited for
portable applications.
The MIC2183 is available in 16-pin SOP and QSOP packag-
ing options with a junction temperature range from -40
°
C to
+125
°
C.
Typical Application
FreqOut
VINA
EN/UVLO
V
2.5V @5A
FREQ/2
VDD
COMP
SS
SYNC
SGND
5
MIC2183
VINP
CSH
CSL
OUTN
OUTP
PGND
FB
V
IN
= 3.3V
1
7
2
15
10
4
3
11
16
9
8
14
13
12
6
120
μ
F (x2)
6.3V
15m
1nF
Si9803DY(x2)
4.7
μ
H
Si9804DY
(x2)
B130
220
μ
F (x2)
6.3V
Adjustable Output Synchronous Buck Converter
Features
Input voltage range: 2.9V to 14V
>90% efficiency
Oscillator frequency of 400kHz
Frequency divide-by-two pin
Frequency sync to 600kHz
FreqOut oscillator output allows simple charge pump
implementation in low voltage systems
Front edge blanking
5
output drivers (typical)
Soft start
PWM current mode control
1
μ
A shutdown current
Cycle-by-cycle current limiting
Frequency foldback short circuit protection
Adjustable under-voltage lockout
16-pin narrow-body SOP and QSOP package options
Applications
3.3V to 2.5V/1.8V/1.5V conversion
DC power distribution systems
Wireless modems
ADSL line cards
1-and 2-cell Li Ion battery operated equipment
Satellite Phones
Micrel, Inc. 1849 Fortune Drive San Jose, CA 95131 USA tel + 1 (408) 944-0800 fax + 1 (408) 944-0970 http://www.micrel.com
50
55
60
65
70
75
80
85
90
95
100
0
1
2
3
4
5
E
OUTPUT CURRENT (A)
MIC2183 EFFICIENCY
V
IN
= 3.3V
V
OUT
= 2.5V
f
S
= 200kHz
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MIC2183_05 | 制造商:MICREL 制造商全稱:Micrel Semiconductor 功能描述:Low Voltage Synchronous Buck PWM Control IC |
| MIC2183BM | 功能描述:IC REG CTRLR BUCK PWM CM 16-SOIC RoHS:否 類別:集成電路 (IC) >> PMIC - 穩(wěn)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(shù):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) |
| MIC2183BM TR | 功能描述:IC REG CTRLR BUCK PWM CM 16-SOIC RoHS:否 類別:集成電路 (IC) >> PMIC - 穩(wěn)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(shù):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) |
| MIC2183BQS | 功能描述:IC REG CTRLR BUCK PWM CM 16-QSOP RoHS:否 類別:集成電路 (IC) >> PMIC - 穩(wěn)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(shù):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) |
| MIC2183BQS TR | 功能描述:IC REG CTRLR BUCK PWM CM 16-QSOP RoHS:否 類別:集成電路 (IC) >> PMIC - 穩(wěn)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(shù):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) |
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