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參數資料
| 型號： | MIC2169MM |
| 廠商： | Micrel Semiconductor,Inc. |
| 英文描述： | 500 KHZ PWM SYNCHRONOUS BUCK CONTROL IC |
| 中文描述： | 500千赫的PWM同步降壓控制IC |
| 文件頁數： | 1/14頁 |
| 文件大小： | 160K |
| 代理商： | MIC2169MM |
November 2003
1
M9999-111803
MIC2169
Micrel
MIC2169
500kHz PWM Synchronous Buck Control IC
General Description
The MIC2169 is a high-efficiency, simple to use 500kHz
PWM synchronous buck control IC housed in a small MSOP-
10 package. The MIC2169 allows compact DC/DC solutions
with a minimal external component count and cost.
The MIC2169 operates from a 3V to 14.5V input, without the
need of any additional bias voltage. The output voltage can
be precisely regulated down to 0.8V. The adaptive all
N-Channel MOSFET drive scheme allows efficiencies over
95% across a wide load range.
The MIC2169 senses current across the high-side N-Chan-
nel MOSFET, eliminating the need for an expensive and
lossy current-sense resistor. Current limit accuracy is main-
tained by a positive temperature coefficient that tracks the
increasing R
DS(ON)
of the external MOSFET. Further cost
and space are saved by the internal in-rush-current limiting
digital soft-start.
The MIC2169 is available in a 10-pin MSOP package, with a
wide junction operating range of –40
°
C to +125
°
C.
All support documentation can be found on Micrel’s web
site at www.micrel.com.
Typical Application
2.5
μ
H
3.3V
V
IN
= 5V
VDD
COMP/EN
VIN
CS
FB
GND
LSD
BST
1k
10k
4k
3.24k
4.7
μ
F
100
μ
F
0.1
μ
F
100nF
IRF7821
SD103BWS
IRF7821
150pF
HSD
VSW
MIC2169
150
μ
F x 2
MIC2169 Adjustable Output 500kHz Converter
Features
3V to 14.5V input voltage range
Adjustable output voltage down to 0.8V
Up to 95% efficiency
500kHz PWM operation
Adjustable current limit senses high-side N-Channel
MOSFET current
No external current-sense resistor
Adaptive gate drive increases efficiency
Ultra-fast response with hysteretic transient recovery
mode
Overvoltage protection protects the load in fault
conditions
Dual mode current limit speeds up recovery time
Hiccup mode short-circuit protection
Internal soft-start
Dual function COMP and EN pin allows low-power
shutdown
Small size MSOP 10-lead package
Applications
Point-of-load DC/DC conversion
Set-top boxes
Graphic cards
LCD power supplies
Telecom power supplies
Networking power supplies
Cable modems and routers
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
2
4
6
I
LOAD
(A)
8
10 12 14 16
E
MIC2169 Efficiency
V
IN
= 5V
V
OUT
= 3.3V
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相關代理商/技術參數 |
參數描述 |
|---|---|
| MIC2169YMM | 功能描述:直流/直流開關調節器 Replaced by MIC2169AYMM (Lead Free) RoHS:否 制造商:International Rectifier 最大輸入電壓:21 V 開關頻率:1.5 MHz 輸出電壓:0.5 V to 0.86 V 輸出電流:4 A 輸出端數量: 最大工作溫度: 安裝風格:SMD/SMT 封裝 / 箱體:PQFN 4 x 5 |
| MIC2169YMM TR | 功能描述:直流/直流開關調節器 Replaced by MIC2169AYMM TR (Lead Free) RoHS:否 制造商:International Rectifier 最大輸入電壓:21 V 開關頻率:1.5 MHz 輸出電壓:0.5 V to 0.86 V 輸出電流:4 A 輸出端數量: 最大工作溫度: 安裝風格:SMD/SMT 封裝 / 箱體:PQFN 4 x 5 |
| MIC2171 | 制造商:MICREL 制造商全稱:Micrel Semiconductor 功能描述:100kHz 2.5A Switching Regulator Preliminary Information |
| MIC2171_07 | 制造商:MICREL 制造商全稱:Micrel Semiconductor 功能描述:100kHz 2.5A Switching Regulator |
| MIC2171BT | 功能描述:IC REG MULTI CONFIG 2.5A TO220-5 RoHS:否 類別:集成電路 (IC) >> PMIC - 穩壓器 - DC DC 開關穩壓器 系列:- 標準包裝:20 系列:SIMPLE SWITCHER® 類型:降壓（降壓） 輸出類型:固定 輸出數:1 輸出電壓:12V 輸入電壓:4 V ~ 60 V PWM 型:電壓模式 頻率 - 開關:52kHz 電流 - 輸出:1A 同步整流器:無 工作溫度:-40°C ~ 125°C 安裝類型:通孔 封裝/外殼:16-DIP（0.300"，7.62mm） 包裝:管件 供應商設備封裝:16-DIP 其它名稱:*LM2575HVN-12LM2575HVN-12 |
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