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参数资料
| 型号： | MAX15049ETJ+ |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 25/31页 |
| 文件大小： | 0K |
| 描述： | IC CTRLR PWM STP-DN TRIPL 32WQFN |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 1 |
| 应用： | 电源控制器，序列发生器 |
| 电源电压： | 4.7 V ~ 23 V |
| 电流 - 电源： | 6mA |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 32-WFQFN 裸露焊盘 |
| 供应商设备封装： | 32-TQFN-EP（5x5） |
| 包装： | 管件 |
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MAX15048/MAX15049
Triple-Output Buck Controllers
with Tracking/Sequencing
f CO ≤ SW
V RAMP (2 π × f CO × L) V OUT_
R F =
f ZERO, ESR =
f LC =
G MOD CO ) = × ×
V IN ESR V FB_
Design procedures for both Type II and Type III compen-
sators are shown below.
Type II: Compensation when f CO > f ZERO, ESR
When the f ZERO, ESR is lower than f CO and close to f LC ,
a Type II compensation network provides the neces-
sary closed-loop response. The Type II compensation
network provides a midband compensating zero and
high-frequency pole (see Figures 5a and 5b).
R F C F provides the midband zero f MID, ZERO , and R F C CF
provides the high-frequency pole. Use the following proce-
dure to calculate the compensation network components:
1) Calculate the f ZERO, ESR and LC double pole, f LC :
1
2 π × ESR × C OUT
1
2 π × L × C OUT
2) Select the unity-gain crossover frequency as:
f
10
3) Determine R F from the following:
V FB_ × V IN × g MOD × ESR
Note: R F is derived by setting the total loop gain at cross-
over frequency to unity, e.g., G E/A (f CO ) x G MOD (f CO )
= 1V/V. The transconductance error-amplifier gain is
G E/A (f CO ) = g MOD x R F , while the modulator gain is:
(f
V RAMP 2 π × f CO × L V OUT_
The total loop gain can be expressed logarithmically as
follows:
V OUT_
20 × log 10 [ g M R F ] + 20 × log 10 ? ? =
(2 × π × f CO OUT_ RAMP ? ?
? ?
R 1
? ESR × V IN × V FB_ ?
× L) × V × V
0dB
R 2
V REF
g M
COMP_
where V RAMP is the peak-to-peak ramp amplitude equal
to 1.2V:
R F
4) Place a zero at or below the LC double pole, f LC :
C F
C CF
C F =
1
2 π × R F × f LC
Figure 5a. Type II Compensation Network
5) Place a high-frequency pole at or below f P = 0.5 x f SW :
GAIN
(dB)
C CF =
1
π × R F × f SW
1ST ASYMPTOTE
G MOD V REF V OUT_-1 ( ω C F ) -1
6) Choose an appropriately sized R 1 (connected from
OUT_ to FB_, start with a 10k I ). Once R 1 is selected,
calculate R 2 using the following equation:
2ND ASYMPTOTE
G MOD V REF V OUT_-1 RF
3RD ASYMPTOTE
G MOD V REF V OUT_-1 ( ω C CF ) -1
2
R = R 1 ×
V FB_
V OUT_ -V FB_
1ST POLE
(AT ORIGIN)
1ST ZERO
(R F C F ) -1
2ND POLE
(R F C CF ) -1
ω( rad/s )
where V FB_ = 0.6V.
Figure 5b. Type II Compensation Network Response
Maxim Integrated
25
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX15049ETJ+ | 功能描述:DC/DC 开关控制器 1.2MHz Triple Buck w/Tracking 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 |
| MAX15049ETJ+ | 制造商:Maxim Integrated Products 功能描述:IC BUCK CNTRL TRIPLE 32WQFN 制造商:Maxim Integrated Products 功能描述:IC, BUCK, CNTRL, TRIPLE, 32WQFN |
| MAX15049ETJ+ | 制造商:Maxim Integrated Products 功能描述:IC PWM STEP-DOWN DC/DC CONVER |
| MAX15049ETJ+T | 功能描述:DC/DC 开关控制器 1.2MHz Triple Buck w/Tracking 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 |
| MAX15049EVKIT+ | 功能描述:电源管理IC开发工具 MAX15049 Eval Kit 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 |
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