- 您现在的位置：买卖IC网 > PDF目录383343 > MAX1973EUB (MAXIM INTEGRATED PRODUCTS INC) Smallest 1A, 1.4MHz Step-Down Regulators PDF资料下载
参数资料
| 型号： | MAX1973EUB |
| 厂商： | MAXIM INTEGRATED PRODUCTS INC |
| 元件分类： | 稳压器 |
| 英文描述： | Smallest 1A, 1.4MHz Step-Down Regulators |
| 中文描述： | 2.4 A SWITCHING REGULATOR, 1600 kHz SWITCHING FREQ-MAX, PDSO10 |
| 封装： | MICRO, SOP-10 |
| 文件页数： | 12/15页 |
| 文件大小： | 331K |
| 代理商： | MAX1973EUB |
M
where f
SW
is the switching frequency (1.4
10
6
Hz), and
LIR is the inductor ripple current as a percentage of the
maximum load current. Keep LIR between 20% and
40% for best compromise of cost, size, and perfor-
mance. The peak inductor current is approximately:
Input Capacitor
A 4.7μF ceramic input capacitor is recommended for
most applications because of its low equivalent series
resistance (ESR), equivalent series inductance (ESL),
and cost. To ensure stability over a wide temperature
range, an X5R or X7R dielectric is recommended.
The input capacitor reduces peak currents drawn from
the power source and reduces noise and voltage ripple
on the input caused by the circuit
’
s switching. The input
capacitor must meet the ripple current requirement
(I
RMS
) imposed by the switching currents defined by
the following equation:
Choose a capacitor that exhibits less than 10
°
C tem-
perature rise at the maximum operating RMS current for
optimum long-term reliability.
Output Capacitor
A 4.7μF ceramic output capacitor is recommended for
most applications because of its low ESR, ESL, and
lower cost. To ensure stability over a wide temperature
range, an X5R or X7R dielectric is recommended.
Key selection parameters for a ceramic output capacitor
are capacitance, ESR, and voltage rating. These affect
the overall stability, output ripple voltage, and transient
I
I
V
V
V
V
RMS
OUT
IN
OUT
IN
OUT
=
(
)
I
LIR
2
I
L PEAK
(
OUT MAX
(
)
)
=
+
×
1
Smallest 1A, 1.4MHz Step-Down Regulators
12
______________________________________________________________________________________
MAX1973
IN
COMP
FBSEL
SS
GND
LX
FB
CTL1
CTL2
PGND
3.3
μ
H
1.8V
4.7
μ
F
0.1
μ
F
470pF
36k
4.7
μ
F
V
IN
= 2.6V TO 5.5V
Figure 2. MAX1973 with 1.8V Preset Output
MAX1974
IN
COMP
FBSEL
SS
GND
LX
FB
POK
ON
PGND
3.3
μ
H
1.5V
4.7
μ
F
0.1
μ
F
330pF
43k
4.7
μ
F
V
IN
= 2.6V TO 5.5V
POK
100k
IN
IN
Figure 3. MAX1974 with Preset 1.5V Output
MAX1973
IN
COMP
FBSEL
SS
GND
LX
FB
CTL1
CTL2
PGND
3.3
μ
H
1.25V TO V
IN
4.7
μ
F
0.1
μ
F
C
C
R
C
4.7
μ
F
V
IN
= 2.6V TO 5.5V
R1
R2
Figure 4. MAX1973 with Adjustable Output Voltage Set by R1
and R2
MAX1974
IN
COMP
FBSEL
SS
GND
LX
FB
ON
POK
PGND
3.3
μ
H
0.75V TO V
IN
4.7
μ
F
0.1
μ
F
C
C
R
C
4.7
μ
F
V
IN
= 2.6V TO 5.5V
R1
R2
IN
IN
100k
POK
Figure 5. MAX1974 with Adjustable Output Voltage Set by R1
and R2
相关PDF资料 |
PDF描述 |
|---|---|
| MAX1974EUB | Smallest 1A, 1.4MHz Step-Down Regulators |
| MAX1976ETT-T | Low-Input-Voltage, 300mA LDO Regulators with RESET in SOT and TDFN |
| MAX1976EZT-T | Low-Input-Voltage, 300mA LDO Regulators with RESET in SOT and TDFN |
| MAX1978 | Integrated Temperature Controllers for Peltier Modules |
| MAX1978-MAX1979 | Integrated Temperature Controllers for Peltier Modules |
相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX1973EUB+ | 功能描述:直流/直流开关调节器 1A 1.4MHz Step-Down Regulator 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 |
| MAX1973EUB+T | 功能描述:直流/直流开关调节器 1A 1.4MHz Step-Down Regulator 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 |
| MAX1973EUB-T | 功能描述:直流/直流开关调节器 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 |
| MAX1973EVKIT | 功能描述:直流/直流开关调节器 Evaluation Kit for the MAX1973 MAX1974 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 |
| MAX1974EUB | 功能描述:直流/直流开关调节器 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 |
发布紧急采购，3分钟左右您将得到回复。