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参数资料
| 型号： | LT1533IS#PBF |
| 厂商： | Linear Technology |
| 文件页数： | 1/20页 |
| 文件大小： | 0K |
| 描述： | IC REG PUSH-PLL CTRLR ISO 16SOIC |
| 标准包装： | 50 |
| 类型： | 推挽式控制器，隔离式 |
| 输出类型： | 可调式 |
| 输出数： | 1 |
| 输出电压： | 1.3 V ~ 30 V |
| 输入电压： | 2.7 V ~ 23 V |
| PWM 型： | 电流模式 |
| 频率 - 开关： | 200kHz ~ 250kHz |
| 电流 - 输出： | 1A |
| 同步整流器： | 无 |
| 工作温度： | -40°C ~ 100°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 16-SOIC（0.154"，3.90mm 宽） |
| 包装： | 管件 |
| 供应商设备封装： | 16-SOIC |
| 产品目录页面： | 1327 (CN2011-ZH PDF) |
LT1533
Ultralow Noise
1A Switching Regulator
FEATURES
DESCRIPTIO N
s
s
s
s
s
s
s
s
s
s
s
Greatly Reduced Conducted and Radiated EMI
(<100 μ V P-P in Typical Application)
Low Switching Harmonic Content
Independent Control of Switch Voltage and
Current Slew Rates
Two 1A Current Limited Power Switches
Regulates Positive and Negative Voltages
20kHz to 250kHz Oscillator Frequency
Easily Synchronized to External Clock
Wide Input Voltage Range: 2.7V to 23V
Low Shutdown Current: 12 μ A Typical
Easier Layout than with Conventional Switchers
Outputs Can Be Forced to 50% Duty Cycle for
Unregulated Applications
The LT ? 1533 is a new class of switching regulator designed
to reduce conducted and radiated electromagnetic interfer-
ence (EMI). Ultralow noise and EMI are achieved by providing
user control of the output switch slew rates. Voltage and
current slew rates can be independently programmed to
optimize switcher harmonic content versus efficiency. The
LT1533 can reduce high frequency harmonic power by as
much as 40dB with only minor losses in efficiency.
The LT1533 utilizes a dual output switch current mode
architecture optimized for low noise topologies. The IC
includes two 1A power switches along with all necessary
oscillator, control and protection circuitry. Unique error amp
circuitry can regulate both positive and negative voltages.
The internal oscillator may be synchronized to an external
APPLICATIO N S
clock for more accurate placement of switching harmonics.
Protection features include cycle by cycle current limit pro-
s
s
s
s
s
Precision Instrumentation Systems
Isolated Supplies for Industrial Automation
Medical Instruments
Wireless Communications
Single Board Data Acquisition Systems
, LTC and LT are registered trademarks of Linear Technology Corporation.
tection, undervoltage lockout and thermal shutdown.
Low minimum supply voltage and low supply current during
shutdown make the LT1533 well suited for portable applica-
tions. The part may also be forced into a 50% duty cycle mode
for unregulated applications. The LT1533 is available in the
16-pin narrow SO package.
TYPICAL APPLICATIO N
Low Noise 5V to 12V Forward Push-Pull DC/DC Converter
+
33 μ F
820pF
16.9k
11
3
4
5
6
SHDN
DUTY
SYNC
C T
R T
5V
14
V IN
LT1533
COL A
COL B
PGND
R VSL
R CSL
2
15
16
13
12
T1
Note 1
15k
15k
1N4148
L1
300 μ H
1N4148
+
B
L2
33 μ H
C1
47 μ F
16V
+
A
12V
150mA
C2
33 μ F
20V
A
100 μ V/DIV
B
2mV/DIV
12V Output Noise (BW = 100MHz)
<100 μ V P-P
0.015 μ F
15k
10
V C
GND
1000pF 9
NFB
8
FB
7
21.5k, 1%
2.49k
1%
1533 TA01
C1: SANYO OS-CON
C2: AVX TPS TANTALUM
L1: COILTRONICS CTX300-2
2 μ s/DIV
L2: COILCRAFT DT1608C-333
1533 TA02
T1: COILTRONICS CTX02-13834
NOTE 1: 25nH TRACE INDUCTANCE
OR COILCRAFT B07T
1
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相关代理商/技术参数 |
参数描述 |
|---|---|
| LT1534 | 制造商:LINER 制造商全称:Linear Technology 功能描述:Ultralow Noise 2A Switching Regulators |
| LT1534-1 | 制造商:LINER 制造商全称:Linear Technology 功能描述:Ultralow Noise 2A Switching Regulators |
| LT-1534-501-024 | 制造商:Carling Technologies 功能描述:LT-SERIES TOGGLE SWITCH - Bulk |
| LT-1534-510-012 | 制造商:Carling Technologies 功能描述:LT-SERIES TOGGLE SWITCH - Bulk |
| LT-1534-510-024 | 制造商:Carling Technologies 功能描述:LT-SERIES TOGGLE SWITCH - Bulk |
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