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参数资料
| 型号： | MAX1836EUT33-T |
| 厂商： | MAXIM INTEGRATED PRODUCTS INC |
| 元件分类： | 稳压器 |
| 英文描述： | 24V Internal Switch, 100% Duty Cycle, Step-Down Converters |
| 中文描述： | 0.45 A SWITCHING REGULATOR, PDSO6 |
| 封装： | MO-178AB, SOT-23, 6 PIN |
| 文件页数： | 8/13页 |
| 文件大小： | 394K |
| 代理商： | MAX1836EUT33-T |
M
24V Internal Switch, 100% Duty Cycle,
Step-Down Converters
8
_______________________________________________________________________________________
stant-frequency pulse-width-modulation (PWM) con-
trollers that switch the MOSFET unnecessarily.
When the output voltage is too low, an error comparator
sets a flip-flop, which turns on the internal P-channel
MOSFET and begins a switching cycle (Figure 3). As
shown in Figure 4, the inductor current ramps up linear-
ly, charging the output capacitor and servicing the
load. The MOSFET turns off when the current limit is
reached, or when the maximum on-time is exceeded
while the output voltage is in regulation. Otherwise, the
MOSFET remains on, allowing a duty cycle up to 100%
to ensure the lowest possible dropout voltage. Once
the MOSFET turns off, the flip-flop resets, diode D1
turns on, and the current through the inductor ramps
back down, transferring the stored energy to the output
capacitor and load. The MOSFET remains off until the
0.5μs minimum off-time expires and the inductor cur-
rent ramps down to zero, and the output voltage drops
back below the set point.
4
μ
s/div
CIRCUIT OF FIGURE 2, V
IN
= 12V
A. V
LX
, 5V/div
B. V
= 3.3V, 20mV/div, 200mA LOAD
C. INDUCTOR CURRENT, 500mA/div
10V
0
500mA
3.3V
A
B
C
0
Figure 4. Discontinuous-Conduction Operation
INPUT
4.5V OR 24V
C
IN
OUTPUT
3.3V OR 5V
D1
L1
C
OUT
MAX1836
MAX1837
IN
GND
LX
SHDN
FB
OUT
Q
MAXIMUM
ON-TIME
DELAY
TRIG
Q
MAXIMUM
OFF-TIME
DELAY
TRIG
Q
R
S
V
SENSE
V
SET
1.25V
100mV
Figure 3. Functional Diagram
相关PDF资料 |
PDF描述 |
|---|---|
| MAX1837EUT33-T | 24V Internal Switch, 100% Duty Cycle, Step-Down Converters |
| MAX1836 | Replaced by TMS320BC52 : Digital Signal Processors 100-LQFP |
| MAX1837EUT50 | 24V Internal Switch, 100% Duty Cycle, Step-Down Converters |
| MAX1837EUT50-T | 24V Internal Switch, 100% Duty Cycle, Step-Down Converters |
| MAX1836EUT33 | COIL 330UH 240MA CHOKE SMD |
相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX1836EUT33TG16 | 制造商:Maxim Integrated Products 功能描述:24V Internal Switch, Step-Down Converter |
| MAX1836EUT50 | 制造商:Maxim Integrated Products 功能描述:24V INTERNAL SWITCH 100% DUTY CYCL - Rail/Tube |
| MAX1836EUT50#G16 | 制造商:Maxim Integrated Products 功能描述:24V INTERNAL SWITCH, 100% DUTY CYCL - Rail/Tube |
| MAX1836EUT50#TG16 | 功能描述:直流/直流开关转换器 24V 100% Duty Cycle RoHS:否 制造商:STMicroelectronics 最大输入电压:4.5 V 开关频率:1.5 MHz 输出电压:4.6 V 输出电流:250 mA 输出端数量:2 最大工作温度:+ 85 C 安装风格:SMD/SMT |
| MAX1836EUT50#TG40 | 功能描述:直流/直流开关转换器 24V 100% Duty Cycle RoHS:否 制造商:STMicroelectronics 最大输入电压:4.5 V 开关频率:1.5 MHz 输出电压:4.6 V 输出电流:250 mA 输出端数量:2 最大工作温度:+ 85 C 安装风格:SMD/SMT |
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