- 您现在的位置：买卖IC网 > PDF目录13493 > MIC2179BSM (Micrel Inc)IC REG BUCK SYNC ADJ 1.5A 20SSOP PDF资料下载
参数资料
| 型号： | MIC2179BSM |
| 厂商： | Micrel Inc |
| 文件页数： | 1/13页 |
| 文件大小： | 0K |
| 描述： | IC REG BUCK SYNC ADJ 1.5A 20SSOP |
| 标准包装： | 67 |
| 类型： | 降压（降压） |
| 输出类型： | 可调式 |
| 输出数： | 1 |
| 输出电压： | 1.25 V ~ 16.5 V |
| 输入电压： | 4.5 V ~ 16.5 V |
| PWM 型： | 电流模式 |
| 频率 - 开关： | 200kHz |
| 电流 - 输出： | 1.5A |
| 同步整流器： | 是 |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 20-SSOP（0.209"，5.30mm 宽） |
| 包装： | 管件 |
| 供应商设备封装： | 20-SSOP |
Micrel, Inc.
General Description
The Micrel MIC2179 is a 200kHz synchronous buck (step-
down) switching regulator designed for high-efficiency, bat -
tery-powered applications.
The MIC2179 operates from a 4.5V to 16.5V input and features
internal power MOSFETs that can supply up to 1.5A output
current. It can operate with a maximum duty cycle of 100%
for use in low-dropout conditions. It also features a shutdown
mode that reduces quiescent current to less than 5μA.
The MIC2179 achieves high efficiency over a wide output
current range by operating in either PWM or skip mode. The
operating mode is externally selected, typically by an intel-
ligent system, which chooses the appropriate mode according
to operating conditions, efficiency, and noise requirements.
The switching frequency is preset to 200kHz and can be
synchronized to an external clock signal of up to 300kHz.
The MIC2179 uses current-mode control with internal current
sensing. Current-mode control provides superior line regula-
tion and makes the regulator control loop easy to compensate.
The output is protected with pulse-by-pulse current limiting
and thermal shutdown. Undervoltage lockout turns the output
off when the input voltage is less than 4.5V.
The MIC2179 and is packaged in a 20-lead SSOP package
with an operating temperature range of –40°C to +85°C.
MIC2179
MIC2179
1.5A Synchronous Buck Regulator
Features
? 4.5V to 16.5V input voltage range
? Dual-mode operation for high efficiency (up to 96%)
PWM mode for > 150mA load current
Skip mode for <150mA load current
? 150mΩ internal power MOSFETs at 12V input
? 200kHz preset switching frequency
? Low quiescent current
1.0mA in PWM mode
600μA in skip mode
< 5μA in shutdown mode
? Current-mode control
Simplified loop compensation
Superior line regulation
? 100% duty cycle for low dropout operation
? Current limit
? Thermal shutdown
? Undervoltage lockout
Applications
? High-efficiency, battery-powered supplies
? Buck (step-down) dc-to-dc converters
? Cellular telephones
? Laptop computers
? Hand-held instruments
? Battery Charger
Typical Application
V IN
5.4V to 16.5V
SW
MIC
C1
10μF
20V
Output Good
Output Low
Skip Mode
PWM Mode
R1
20k
15
6
5
13
U1 16,17
VIN
EN
PWRGD
PWM 2179-3.3 PGND
SYNC FB
3,4
1,2,
19,20
7
L1
22μH
D1
MBRM120
V OUT
3.3V/600mA
C2
100μF
6.3V
COMP SGND
BIAS
8
9–12
14
C4
6.8nF
C3
0.01μF
R5
4.02k
Pins 4 and 18 are not connected.
Pins 3 and 4 can be connected
together for a low-impedance
connection.
Micrel, Inc. ? 2180 Fortune Drive ? San Jose, CA 95131 ? USA ? tel + 1 (408) 944-0800 ? fax + 1 (408) 474-1000 ? http://www.micrel.com
June 2009
1
M9999-063009
相关PDF资料 |
PDF描述 |
|---|---|
| VI-J33-EY-F2 | CONVERTER MOD DC/DC 24V 50W |
| MAX6770TAMD1+T | IC REG LINEAR 5V/ADJ 8-TDFN |
| GBB70DHLN | CONN EDGECARD 140PS .050 DIP SLD |
| MAX6770TAMD0+T | IC REG LINEAR 5V/ADJ 8-TDFN |
| ADP3339AKCZ-1.8-RL | IC REG LDO 1.8V 1.5A SOT-223 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| MIC2179BSM TR | 功能描述:直流/直流开关调节器 1.5A 200kHz Synchronous Switcher in SSOP Pkg RoHS:否 制造商:International Rectifier 最大输入电压:21 V 开关频率:1.5 MHz 输出电压:0.5 V to 0.86 V 输出电流:4 A 输出端数量: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:PQFN 4 x 5 |
| MIC2179SYM | 制造商:RF Micro Devices Inc 功能描述: |
| MIC2179YSM | 功能描述:直流/直流开关调节器 1.5A 200kHz Synchronous Switcher in SSOP Pkg (Lead Free) RoHS:否 制造商:International Rectifier 最大输入电压:21 V 开关频率:1.5 MHz 输出电压:0.5 V to 0.86 V 输出电流:4 A 输出端数量: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:PQFN 4 x 5 |
| MIC2179YSM TR | 功能描述:直流/直流开关调节器 1.5A 200kHz Synchronous Switcher in SSOP Pkg (Lead Free) RoHS:否 制造商:International Rectifier 最大输入电压:21 V 开关频率:1.5 MHz 输出电压:0.5 V to 0.86 V 输出电流:4 A 输出端数量: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:PQFN 4 x 5 |
| MIC2179YSM-TR | 功能描述:Buck Switching Regulator IC Positive Adjustable 1.245V 1 Output 1.5A 20-SSOP (0.209", 5.30mm Width) 制造商:microchip technology 系列:- 包装:剪切带（CT） 零件状态:停产 功能:降压 输出配置:正 拓扑:降压 输出类型:可调式 输出数:1 电压 - 输入（最小值）:4.5V 电压 - 输入（最大值）:16.5V 电压 - 输出（最小值/固定）:1.245V 电压 - 输出（最大值）:16.5V 电流 - 输出:1.5A 频率 - 开关:200kHz 同步整流器:无 工作温度:-40°C ~ 125°C （TJ） 安装类型:表面贴装 封装/外壳:20-SSOP（0.209"，5.30mm 宽） 供应商器件封装:20-SSOP 标准包装:1 |
发布紧急采购，3分钟左右您将得到回复。