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参数资料
| 型号： | MAX15038EVKIT+ |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 15/19页 |
| 文件大小： | 0K |
| 描述： | EVALUATION KIT FOR MAX15038 |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 1 |
| 主要目的： | DC/DC，步降 |
| 输出及类型： | 1，非隔离 |
| 输出电压： | 1.8V |
| 电流 - 输出： | 4A |
| 输入电压： | 2.9 ~ 5.5 V |
| 稳压器拓扑结构： | 降压 |
| 频率 - 开关： | 1MHz |
| 板类型： | 完全填充 |
| 已供物品： | 板 |
| 已用 IC / 零件： | MAX15038 |
4A, 2MHz Step-Down Regulator
with Integrated Switches
amplifier must compensate for this gain drop and phase
shift to achieve a stable high-bandwidth closed-loop sys-
tem. Therefore, use type III compensation as shown in
Figures 3 and 4. Type III compensation possesses three
poles and two zeros with the first pole, fP1_EA, located at
zero frequency (DC). Locations of other poles and zeros
of the type III compensation are given by:
The above equations are based on the assumptions
that C1 >> C2 and R3 >> R2 are true in most applica-
tions. Placements of these poles and zeros are deter-
mined by the frequencies of the double pole and ESR
zero of the power transfer function. It is also a function
of the desired close-loop bandwidth. The following sec-
tion outlines the step-by-step design procedure to cal-
f Z 1 _ EA =
f Z 2 _ EA =
1
2 π × R 1 × C 1
1
2 π × R 3 × C 3
culate the required compensation components for the
MAX15038. When the output voltage of the MAX15038
is programmed to a preset voltage, R3 is internal to the
IC and R4 does not exist (Figure 3b).
When externally programming the MAX15038
(Figure 3a), the output voltage is determined by:
f P 3 _ EA =
f P 2 _ EA =
1
2 π × R 1 × C 2
1
2 π × R 2 × C 3
or:
R 4 =
0 . 6 × R 3
( V OUT - 0 . 6 )
( for V OUT > 0 . 6 V )
( V OUT REFIN )
R 4 =
( V RE F IN × R 3)
-V
LX
L
V OUT
if using an external V REFIN , and V OUT > V REFIN .
CTL1
CTL2
MAX15038
OUT
FB
COMP
R1
C OUT
C1
R3
R4
R2
C3
For a 0.6V output or for V OUT = V REFIN , connect an
8.06k Ω resistor from FB to V OUT . The zero-cross fre-
quency of the close-loop, f C , should be between 10%
and 20% of the switching frequency, f S . A higher zero-
cross frequency results in faster transient response.
Once f C is chosen, C1 is calculated from the following
equation:
1 . 5625 ×
2 × π × f C × R 3 × ( 1 + L )
C2
a) EXTERNAL RESISTIVE DIVIDER
L
V OUT
C 1 =
V IN
V P ? P
R
R O
LX
where V P-P is the ramp peak-to-peak voltage (1V typ).
MAX15038
OUT
C OUT
R2
Due to the underdamped nature of the output LC double
pole, set the two zero frequencies of the type III compen-
sation less than the LC double-pole frequency to provide
adequate phase boost. Set the two zero frequencies to
R3
80% of the LC double-pole frequency. Hence:
VOLTAGE
SELECT
CTL1
CTL2
8k Ω
FB
COMP
R1
C2
C1
C3
R 1 =
C 3 =
1
0 . 8 x C 1
1
0 . 8 x R 3
x
x
L x C O x ( R O + ESR )
R L + R O
L x C O x ( R O + ESR )
R L + R O
b) INTERNAL PRESET VOLTAGES
Figure 3. Type III Compensation Network
Setting the second compensation pole, f P2_EA , at
f Z_ESR yields:
______________________________________________________________________________________
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX15038EVKIT+ | 功能描述:电源管理IC开发工具 4A 2MHz Step-Down w/Integrated Switch RoHS:否 制造商:Maxim Integrated 产品:Evaluation Kits 类型:Battery Management 工具用于评估:MAX17710GB 输入电压: 输出电压:1.8 V |
| MAX15039ETG+ | 功能描述:直流/直流开关调节器 6A 2MHz Step-Down w/Integrated Switch 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 |
| MAX15039ETG+T | 功能描述:直流/直流开关调节器 6A 2MHz Step-Down w/Integrated Switch 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 |
| MAX15039EVKIT+ | 功能描述:电源管理IC开发工具 6A 2MHz Step-Down w/Integrated Switch RoHS:否 制造商:Maxim Integrated 产品:Evaluation Kits 类型:Battery Management 工具用于评估:MAX17710GB 输入电压: 输出电压:1.8 V |
| MAX1503XETJ | 制造商:Rochester Electronics LLC 功能描述: 制造商:Maxim Integrated Products 功能描述: |
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