- 您现在的位置：买卖IC网 > PDF目录14059 > MIC4574-3.3YN (Micrel Inc)IC REG BUCK 3.3V 0.5A 8DIP PDF资料下载
参数资料
| 型号： | MIC4574-3.3YN |
| 厂商： | Micrel Inc |
| 文件页数： | 1/7页 |
| 文件大小： | 0K |
| 描述： | IC REG BUCK 3.3V 0.5A 8DIP |
| 标准包装： | 50 |
| 类型： | 降压（降压） |
| 输出类型： | 固定 |
| 输出数： | 1 |
| 输出电压： | 3.3V |
| 输入电压： | 4 V ~ 24 V |
| 频率 - 开关： | 200kHz |
| 电流 - 输出： | 500mA |
| 同步整流器： | 无 |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 通孔 |
| 封装/外壳： | 8-DIP（0.300"，7.62mm） |
| 包装： | 管件 |
| 供应商设备封装： | 8-PDIP |
| 产品目录页面： | 1093 (CN2011-ZH PDF) |
| 其它名称： | 576-2338 MIC4574-3.3YN-ND |
MIC4574
General Description
The MIC4574 is a series of easy to use fixed and adjustable
BiCMOS step-down (buck) switch-mode voltage regulators.
The 200kHz MIC4574 duplicates the pinout and function of
the 52kHz LM2574. The higher switching frequency may
allow up to a 2:1 reduction in output filter inductor size.
The MIC4574 is available in 3.3V, and 5V fixed output
versions or a 1.23V to 20V adjustable output version. Both
versions are capable of driving a 0.5A load with excellent line
and load regulation.
The feedback voltage is guaranteed to ± 2% tolerance for
adjustable versions, and the output voltage is guaranteed to
± 3% for fixed versions, within specified voltages and load
conditions. The oscillator frequency is guaranteed to ± 10%.
In shutdown mode, the regulator draws less than 200 μ A
standby current. The regulator performs cycle-by-cycle cur-
rent limiting and thermal shutdown for protection under fault
conditions.
Micrel, Inc.
MIC4574
200kHz Simple 0.5A Buck Regulator
Features
? Fixed 200kHz operation
? 3.3V, 5V, and adjustable output versions
? Voltage over specified line and load conditions:
Fixed version: ± 3% max. output voltage
Adjustable version: ± 2% max. feedback voltage
? Guaranteed 0.5A switch current
? Wide 4V to 24V input voltage range
? Wide 1.23V to 20V output voltage range
? Requires minimum external components
? < 200 μ A typical shutdown mode
? 75% efficiency (adjustable version > 75% typ.)
? Standard inductors and capacitors are
25% of typical LM2574 values
? Thermal shutdown
? Overcurrent protection
? 100% electrical thermal limit burn-in
Applications
This series of simple switch-mode regulators requires a
minimum number of external components and can operate
using a standard series of inductors. Frequency compensa-
tion is provided internally.
?
?
?
?
Simple high-efficiency step-down (buck) regulator
Efficient preregulator for linear regulators
On-card switching regulators
Positive-to-negative converter (inverting buck-boost)
The MIC4574 is available in the DIP (N) package and is rated
over the industrial temperature range.
Data sheets and support documentation can be found on
Micrel’s web site at www.micrel.com.
Typical Application
? Isolated flyback converter using minimum external
components
? Negative boost converter
Shutdown
Enable
3
SHDN
SW
7
L1
100μH
5.0V/0.5A
8V to 24V
C1
47μF
35V
5
MIC4574-5.0BN
V IN FB
SGND PGND
2 4
1
D1
1N5819
C2
220μF
16V
Fixed Regulator
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 2005
1
M9999-062105
相关PDF资料 |
PDF描述 |
|---|---|
| 22R226C | INDUCTOR RADIAL 22MH 0.045A |
| VE-JVK-CZ-F3 | CONVERTER MOD DC/DC 40V 25W |
| MAX6869UK37D4L+T | IC MPU SUPERVISOR SOT23-5 |
| VE-JVK-CZ-F2 | CONVERTER MOD DC/DC 40V 25W |
| LT1934IS6-1#TRM | IC REG BUCK ADJ 60MA SOT23-6 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| MIC4574-5.0BN | 功能描述:IC REG BUCK 5V 0.5A 8DIP RoHS:否 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 开关稳压器 系列:- 标准包装:20 系列:SIMPLE SWITCHER® 类型:降压（降压） 输出类型:固定 输出数:1 输出电压:12V 输入电压:4 V ~ 60 V PWM 型:电压模式 频率 - 开关:52kHz 电流 - 输出:1A 同步整流器:无 工作温度:-40°C ~ 125°C 安装类型:通孔 封装/外壳:16-DIP（0.300"，7.62mm） 包装:管件 供应商设备封装:16-DIP 其它名称:*LM2575HVN-12LM2575HVN-12 |
| MIC4574-5.0BWM | 制造商:MICREL 制造商全称:Micrel Semiconductor 功能描述:200kHz Simple 0.5A Buck Voltage Regulator |
| MIC4574-5.0YN | 功能描述:直流/直流开关调节器 200kHz 0.5A Step-down Regulator (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 |
| MIC4574BN | 功能描述:IC REG BUCK ADJ 0.5A 8DIP RoHS:否 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 开关稳压器 系列:- 标准包装:20 系列:SIMPLE SWITCHER® 类型:降压（降压） 输出类型:固定 输出数:1 输出电压:12V 输入电压:4 V ~ 60 V PWM 型:电压模式 频率 - 开关:52kHz 电流 - 输出:1A 同步整流器:无 工作温度:-40°C ~ 125°C 安装类型:通孔 封装/外壳:16-DIP（0.300"，7.62mm） 包装:管件 供应商设备封装:16-DIP 其它名称:*LM2575HVN-12LM2575HVN-12 |
| MIC4574BWM | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
发布紧急采购，3分钟左右您将得到回复。