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參數(shù)資料
| 型號： | MIC2184BM |
| 廠商： | MICREL INC |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | Low Voltage Buck PWM Control IC Final Information |
| 中文描述： | SWITCHING CONTROLLER, 440 kHz SWITCHING FREQ-MAX, PDSO16 |
| 封裝： | SOP-16 |
| 文件頁數(shù)： | 1/12頁 |
| 文件大?。?/td> | 75K |
| 代理商： | MIC2184BM |
December 10, 2001
1
MIC2184
MIC2184
Micrel
MIC2184
Low Voltage Buck PWM Control IC
Final Information
General Description
Micrel’s MIC2184 is a high efficiency PWM buck control IC.
With its wide input voltage range of 2.9V to 14V, the MIC2184
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 MIC2184’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 MIC2184 to be exter-
nally synchronized to frequencies below its nominal 400KHz.
The MIC2184 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,
allowing enhanced gate drive, hence higher efficiencies,
despite low input voltages.
MIC2184 features a 1
μ
A shutdown mode, and a program-
mable undervoltage lockout, making it well suited for portable
applications.
The MIC2184 is available in 16 pin SOP and QSOP package
options with a junction temperture range range from –40
°
C
to +125
°
C.
Typical Application
FreqOut
VINA
EN/UVLO
V
2.5V @5A
FREQ/2
VDD
COMP
SS
VREF
SYNC
11
SGND
5
MIC2184
VINP
CSH
CSL
OUTP
PGND
FB
V
IN
= 3.3V
1
7
2
16
10
4
3
13
16
9
8
14
12
6
120
μ
F (x2)
6.3V
15m
Q3
Si9803DY(x2)
4.7
μ
H
220
μ
F(x2)
6.3V
Adjustable Output 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
FrequOut oscillator output allows simple charge pump
implementation in low voltage systems
1.245V reference output
Front edge blanking
5
output driver
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 SOIC 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)
MIC2184 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 |
|---|---|
| MIC2184BM 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(biāo)準(zhǔn)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) |
| MIC2184BQS | 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(biāo)準(zhǔn)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) |
| MIC2184BQS 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(biāo)準(zhǔn)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) |
| MIC2184YM | 功能描述:DC/DC 開關(guān)控制器 SO-16 Low Vin Buck PWM Control IC (Lead Free) RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開關(guān)頻率: 輸出電壓:1.215 V to 80 V 輸出電流:3.5 A 輸出端數(shù)量:1 最大工作溫度:+ 125 C 安裝風(fēng)格: 封裝 / 箱體:CPAK |
| MIC2184YM TR | 功能描述:DC/DC 開關(guān)控制器 SO-16 Low Vin Buck PWM Control IC (Lead Free) RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開關(guān)頻率: 輸出電壓:1.215 V to 80 V 輸出電流:3.5 A 輸出端數(shù)量:1 最大工作溫度:+ 125 C 安裝風(fēng)格: 封裝 / 箱體:CPAK |
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