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参数资料
| 型号： | LT1533IS#PBF |
| 厂商： | Linear Technology |
| 文件页数： | 6/20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
BLOCK DIAGRA
SHDN
V IN
PGND COL A
COL B
V C
LDO REGULATOR
+
NEGATIVE
OUTPUT
–
FEEDBACK
AMP
INTERNAL V CC
+
DRIVERS
NFB
100k
50k
–
SLEW CONTROL
R VSL
FB
g m
COMP
R CSL
ERROR
AMP
1.25V
+
S
FF
Q
R
R T
OSCILLATOR
C T
SYNC
T
FF
Q
OPERATIO
GND
BK
DUTY
QB
1533 BD
In noise sensitive applications, switching regulators tend
to be ruled out as a power supply option due to their
propensity for generating unwanted noise. When switch-
ing supplies are required due to efficiency or input/output
voltage constraints, great pains must be taken to work
around the noise generated by a typical supply. These
steps may include precise synchronization of the power
supply oscillator to an external clock, synchronizing the
rest of the circuit to the power supply oscillator, or halting
power supply switching during noise sensitive operations.
The LT1533 greatly simplifies the task of eliminating
supply noise by enabling the design of an inherently low
noise switching regulator power supply.
The LT1533 is a fixed frequency, current mode switching
regulator with unique circuitry to control the voltage and
current slew rates of the output switches. Slew control
capability provides much greater control over power sup-
6
ply components that can create conducted and radiated
electromagnetic interference. The current mode control
provides excellent AC and DC line regulation and simplifies
loop compensation.
Current Mode Control
A switching cycle begins with an oscillator discharge pulse
which resets the RS flip-flop, turning on one of the output
drivers (refer to Block Diagram). The switch current is
sensed across an internal resistor and the resulting volt-
age is amplified and compared to the output of the error
amplifier (V C pin). The driver is turned off once the output
of the current sense amplifier exceeds the voltage on the
V C pin. The toggle flip-flop ensures that the two output
drivers are enabled on alternate clock cycles. Internal
slope compensation is provided to ensure stability under
high duty cycle conditions.
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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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