參數(shù)資料
型號(hào)： MIC2182
廠商： Micrel Semiconductor,Inc.
英文描述： High-Efficiency Synchronous Buck Controller Final Information
中文描述： 高效率同步降壓控制器決賽信息
文件頁(yè)數(shù)： 1/28頁(yè)
文件大?。?/td> 223K
代理商： MIC2182
June 2000
1
MIC2182
MIC2182
Micrel
MIC2182
High-Efficiency Synchronous Buck Controller
Final Information
General Description
Micrel’s MIC2182 is a synchronous buck (step-down) switch-
ing regulator controller. An all N-channel synchronous archi-
tecture and powerful output drivers allow up to a 20A output
current capabilty. The PWM and skip-mode control scheme
allows efficiency to exceed 95% over a wide range of load
current, making it ideal for battery powered applications, as
well as high current distributed power supplies.
The MIC2182 operates from a 4.5V to 32V input and can
operate with a maximum duty cycle of 86% for use in low-
dropout conditions. It also features a shutdown mode that
reduces quiescent current to 0.1
μ
A.
The MIC2182 achieves high efficiency over a wide output
current range by automatically switching between PWM and
skip mode. Skip-mode operation enables the converter to
maintain high efficiency at light loads by turning off circuitry
pertaining to PWM operation, reducing the no-load supply
current from 1.6mA to 600
μ
A. The operating mode is inter-
nally selected according to the output load conditions. Skip
mode can be defeated by pulling the PWM pin low which
reduces noise and RF interference.
The MIC2182 is available in a 16-pin SOP (small-outline
package) and SSOP (shrink small-outline package) with an
operating range from –40
°
C to +85
°
C.
Typical Application
VDD
BST
C6
0.1
μ
F
R1
2k
R7
100k
V
4.5V to 30V*
V
3.3V/4A
GND
C2
2.2nF
C4
1nF
C3
0.1
μ
F
C5
0.1
μ
F
C1
0.1
μ
F
C9
4.7
μ
F
16V
C11
22uf
35V
x2
D2
SD103BWS
Q2*
Si4884
D1
B140
C7
220uf
10V
×
2
L1
10
μ
H
R2
0.02
Q1*
Si4884
HSD
VSW
LSD
PGND
CSH
VOUT
VREF
SGND
GND
MIC2182-3.3BSM
VIN
EN/UVLO
SS
PWM
COMP
SYNC
C13, 1nF
10
6
2
1
3
5
4
7
9
8
12
13
15
16
14
11
* 30V maximum input voltage limit is due
to standard 30V MOSFET selection.
See
“
Application Information
”
section for
5V to 3.3V/10A and other circuits.
4.5V–30V* to 3.3V/4A Converter
Micrel, Inc. 1849 Fortune Drive San Jose, CA 95131 USA tel + 1 (408) 944-0800 fax + 1 (408) 944-0970 http://www.micrel.com
Features
4.5V to 32V Input voltage range
1.25V to 6V Output voltage range
95% efficiency
300kHz oscillator frequency
Current sense blanking
5
impedance MOSFET Drivers
Drives N-channel MOSFETs
600
μ
A typical quiescent current (skip-mode)
Logic controlled micropower shutdown (I
Q
< 0.1
μ
A)
Current-mode control
Cycle-by-cycle current limiting
Built-in undervoltage protection
Adjustable undervoltage lockout
Easily synchronizable
Precision 1.245V reference output
0.6% total regulation
16-pin SOP and SSOP packages
Frequency foldback overcurrent protection
Sustained short-circuit protection at any input voltage
20A output current capability
Applications
DC power distribution systems
Notebook and subnotebook computers
PDAs and mobile communicators
Wireless modems
Battery-operated equipment
相關(guān)PDF資料
PDF描述
MIC2182-3.3BM High-Efficiency Synchronous Buck Controller Final Information
MIC2182-3.3BSM High-Efficiency Synchronous Buck Controller Final Information
MIC2182BM High-Efficiency Synchronous Buck Controller Final Information
MIC2182BSM High-Efficiency Synchronous Buck Controller Final Information
MIC2182-5.0BSM High-Efficiency Synchronous Buck Controller Final Information
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
MIC2182_04 制造商:MICREL 制造商全稱:Micrel Semiconductor 功能描述:High-Efficiency Synchronous Buck Controller
MIC2182-3.3BM 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)
MIC2182-3.3BM 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)
MIC2182-3.3BSM 功能描述:DC/DC 開關(guān)控制器 High EfficiencySynchronous Buck Controller SSOP Pkg 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
MIC2182-3.3BSM TR 功能描述:DC/DC 開關(guān)控制器 High EfficiencySynchronous Buck Controller SSOP Pkg 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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