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參數(shù)資料
| 型號(hào)： | MIC2169 |
| 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(yè)數(shù)： | 1/14頁(yè) |
| 文件大小： | 160K |
| 代理商： | MIC2169 |
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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
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| MIC2171BT | Isolated Flyback Switching Regulator with 9V Output |
| MIC2171BU | Isolated Flyback Switching Regulator with 9V Output |
| MIC2171 | Isolated Flyback Switching Regulator with 9V Output |
| MIC2185 | Low Voltage Synchronous Boost PWM Control IC |
| MIC2185BM | Low Voltage Synchronous Boost PWM Control IC |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MIC2169_09 | 制造商:MICREL 制造商全稱:Micrel Semiconductor 功能描述:500kHz PWM Synchronous Buck Control IC |
| MIC2169A | 制造商:MICREL 制造商全稱:Micrel Semiconductor 功能描述:500kHz PWM Synchronous Buck Control IC |
| MIC2169A_09 | 制造商:MICREL 制造商全稱:Micrel Semiconductor 功能描述:500kHz PWM Synchronous Buck Control IC |
| MIC2169ABMM | 功能描述:IC REG CTRLR DIVIDER PWM 10-MSOP 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(wú) 回掃:無(wú) 反相:無(wú) 倍增器:無(wú) 除法器:無(wú) Cuk:無(wú) 隔離:無(wú) 工作溫度:-40°C ~ 85°C 封裝/外殼:40-VFQFN 裸露焊盤 包裝:帶卷 (TR) |
| MIC2169ABMM TR | 功能描述:IC REG CTRLR DIVIDER PWM 10-MSOP 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(wú) 回掃:無(wú) 反相:無(wú) 倍增器:無(wú) 除法器:無(wú) Cuk:無(wú) 隔離:無(wú) 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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