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參數(shù)資料
| 型號(hào)： | MIC4575 |
| 廠商： | Micrel Semiconductor,Inc. |
| 英文描述： | 200kHz Simple 1A Buck Voltage Regulator |
| 中文描述： | 200kHz的簡(jiǎn)單1A降壓穩(wěn)壓器 |
| 文件頁(yè)數(shù)： | 1/12頁(yè) |
| 文件大?。?/td> | 213K |
| 代理商： | MIC4575 |
MIC4575
Micrel
4-106
April 1998
MIC4575
200kHz Simple 1A Buck Voltage Regulator
General Description
The MIC4575 is a series of easy to use fixed and adjustable
BiCMOS step-down (buck) switch-mode voltage regulators.
The 200kHz MIC4575 duplicates the pinout and function of
the 52kHz LM2575. The higher switching frequency may
allow up to a 2:1 reduction in output filter inductor size.
The MIC4575 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 1A 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
current limiting and thermal shutdown for protection under
fault conditions.
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.
The MIC4575 is available in TO-220 (T) and TO-263 (U)
packages for the industrial temperature range.
Typical Applications
C1
150μF
35V
D1
1N5819
C2
330μF
16V
L1
68μH
GND
FB
SW
MIC4575-5.0BT
V
IN
SHDN
8V to 24V
5.0V/1A
3
4
2
5
1
Shutdown
Enable
Fixed Regulator
C1
22μF
35V
MBRS130LT3
C2
330μF
6.3V
L1
68μH
GND
FB
MIC4575BU
SW
SHDN
6V to 24V
3.6V/1A
V
IN
R2
2.37k
1%
R1
1.24k
1%
4
2
3
1
5
C3
3300pF
D1
Shutdown
Enable
Adjustable 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 1A 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% typical)
Standard inductors and capacitors are
25% of typical LM2575 values.
Thermal shutdown
Overcurrent protection
100% electrical thermal limit burn-in
Applications
Simple high-efficiency step-down (buck) regulator
Efficient preregulator for linear regulators
On-card switching regulators
Positive-to-negative converter (inverting buck-boost)
Battery Charger
Negative boost converter
Step-down 6V to 3.3V for Intel Pentium
and similar microprocessors
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| MIC4575-3.3BT | 200kHz Simple 1A Buck Voltage Regulator |
| MIC4575-3.3BU | 200kHz Simple 1A Buck Voltage Regulator |
| MIC4575-5.0BT | 200kHz Simple 1A Buck Voltage Regulator |
| MIC4575-5.0BU | 200kHz Simple 1A Buck Voltage Regulator |
| MIC4575BT | 200kHz Simple 1A Buck Voltage Regulator |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MIC4575_09 | 制造商:MICREL 制造商全稱:Micrel Semiconductor 功能描述:200kHz Simple 1A Buck Regulator |
| MIC4575-3.3BT | 功能描述:IC REG BUCK 3.3V 1A TO220-5 RoHS:否 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 開關(guān)穩(wěn)壓器 系列:- 標(biāo)準(zhǔn)包裝:20 系列:SIMPLE SWITCHER® 類型:降壓（降壓） 輸出類型:固定 輸出數(shù):1 輸出電壓:12V 輸入電壓:4 V ~ 60 V PWM 型:電壓模式 頻率 - 開關(guān):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(yīng)商設(shè)備封裝:16-DIP 其它名稱:*LM2575HVN-12LM2575HVN-12 |
| MIC4575-3.3BU | 功能描述:IC REG BUCK 3.3V 1A TO263-5 RoHS:否 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 開關(guān)穩(wěn)壓器 系列:- 標(biāo)準(zhǔn)包裝:20 系列:SIMPLE SWITCHER® 類型:降壓（降壓） 輸出類型:固定 輸出數(shù):1 輸出電壓:12V 輸入電壓:4 V ~ 60 V PWM 型:電壓模式 頻率 - 開關(guān):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(yīng)商設(shè)備封裝:16-DIP 其它名稱:*LM2575HVN-12LM2575HVN-12 |
| MIC4575-3.3BU TR | 功能描述:IC REG BUCK 3.3V 1A TO263-5 RoHS:否 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 開關(guān)穩(wěn)壓器 系列:- 標(biāo)準(zhǔn)包裝:20 系列:SIMPLE SWITCHER® 類型:降壓（降壓） 輸出類型:固定 輸出數(shù):1 輸出電壓:12V 輸入電壓:4 V ~ 60 V PWM 型:電壓模式 頻率 - 開關(guān):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(yīng)商設(shè)備封裝:16-DIP 其它名稱:*LM2575HVN-12LM2575HVN-12 |
| MIC4575-3.3WT | 功能描述:直流/直流開關(guān)調(diào)節(jié)器 200kHz 1.0A Step-down Regulator (ROHS Compliant) RoHS:否 制造商:International Rectifier 最大輸入電壓:21 V 開關(guān)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(shù)量: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:PQFN 4 x 5 |
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