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参数资料
| 型号： | MAX1962EEP |
| 厂商： | MAXIM INTEGRATED PRODUCTS INC |
| 元件分类： | 稳压器 |
| 英文描述： | 2.35V to 5.5V, 0.5% Accurate, 1MHz PWM Step-Down Controllers with Voltage Margining |
| 中文描述： | SWITCHING CONTROLLER, 1120 kHz SWITCHING FREQ-MAX, PDSO20 |
| 封装： | QSOP-20 |
| 文件页数： | 16/29页 |
| 文件大小： | 455K |
| 代理商： | MAX1962EEP |
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M
where:
V
IN(MAX)
= Maximum input voltage
V
RAMP
= Oscillator ramp voltage = 0.85 x 10
6
/f
S
,
where f
S
= switching frequency
L
O
= Output inductance
C
O
= Output capacitance
The goal is to place the two zeros below crossover and
the two poles above crossover so that crossover
occurs with a single-pole slope. The compensation pro-
cedure is as follows:
Select the crossover frequency such that:
f
0
< f
ZESR
and f
0
<1/5
f
S
Select R1 such that:
where g
mEA
= 2mS.
Place the first zero before the double pole:
Place the third pole at half the switching frequency:
If C2 < 10pF, it can be omitted.
Place the second pole after the ESR zero:
If:
increase R1 and recalculate C1, C2, and C3.
Place the second zero at the double-pole frequency:
Set the output voltage:
R
V
V
V
R
V
V
FB
OUT
FB
FB
4
3
0 8
.
=
×
=
-
,
R
f
C
R
LC
3
1
2
3
2
≥
×
×
π
-
R
g
M
2
1
550
<
=
(
),
R
f
C
ZESR
2
1
2
3
≤
×
×
π
C
f
L
R
C
V
V
RAMP
IN
3
2
1
0
0
0
≤
×
×
×
×
×
π
C
f
R
S
2
1
2
0 5
1
≥
×
π
.
C
f
R
LC
1
1
2
1
≥
×
×
π
0 75
R
g
mEA
1
2
>>
2.35V to 5.5V, 0.5% Accurate, 1MHz PWM
Step-Down Controllers with Voltage Margining
16
______________________________________________________________________________________
DH
V
IN
L
O
C
0
R3
R4
R2
R1
C1
C2
C3
V
OUT
LX
DL
FB
COMP
MAX1960
Figure 5. Type 3 Compensation Network
fp1
fz1
fz2
fp2
fp3
GAIN (dB)
FREQUENCY
Figure 6. Transfer Function for Type 3 Compensation
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX1962EEP+ | 功能描述:DC/DC 开关控制器 1MHz PWM Step-Down RoHS:否 制造商:Texas Instruments 输入电压:6 V to 100 V 开关频率: 输出电压:1.215 V to 80 V 输出电流:3.5 A 输出端数量:1 最大工作温度:+ 125 C 安装风格: 封装 / 箱体:CPAK |
| MAX1962EEP+T | 功能描述:DC/DC 开关控制器 1MHz PWM Step-Down RoHS:否 制造商:Texas Instruments 输入电压:6 V to 100 V 开关频率: 输出电压:1.215 V to 80 V 输出电流:3.5 A 输出端数量:1 最大工作温度:+ 125 C 安装风格: 封装 / 箱体:CPAK |
| MAX1962EEP-T | 功能描述:DC/DC 开关控制器 RoHS:否 制造商:Texas Instruments 输入电压:6 V to 100 V 开关频率: 输出电压:1.215 V to 80 V 输出电流:3.5 A 输出端数量:1 最大工作温度:+ 125 C 安装风格: 封装 / 箱体:CPAK |
| MAX1963AETT120+T | 功能描述:低压差稳压器 - LDO Low Input Voltage 300mA LDO Regulators with RESET in SOT and TDFN RoHS:否 制造商:Texas Instruments 最大输入电压:36 V 输出电压:1.4 V to 20.5 V 回动电压（最大值）:307 mV 输出电流:1 A 负载调节:0.3 % 输出端数量: 输出类型:Fixed 最大工作温度:+ 125 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-20 |
| MAX1963AETT150+T | 功能描述:低压差稳压器 - LDO Low-Input-Voltage 300mA LDO Regulators with RESET in SOT and TDFN RoHS:否 制造商:Texas Instruments 最大输入电压:36 V 输出电压:1.4 V to 20.5 V 回动电压（最大值）:307 mV 输出电流:1 A 负载调节:0.3 % 输出端数量: 输出类型:Fixed 最大工作温度:+ 125 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-20 |
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