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参数资料
| 型号： | MAX15035ETL+T |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 22/27页 |
| 文件大小： | 0K |
| 描述： | IC REG BOOST SYNC 15A 40TQFN |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 2,500 |
| 类型： | 升压（升压） |
| 输出类型： | 固定 |
| 输出数： | 1 |
| 输出电压： | 1.05V，1.5V |
| 输入电压： | 4.5 V ~ 26 V |
| PWM 型： | 电流模式 |
| 电流 - 输出： | 15A |
| 同步整流器： | 是 |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 40-WFQFN 裸露焊盘 |
| 包装： | 带卷 (TR) |
| 供应商设备封装： | 40-TQFN-EP（6x6） |
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15A Step-Down Regulator with Internal Switches
With most chemistries (polymer, tantalum, aluminum
electrolytic), the actual capacitance value required
relates to the physical size needed to achieve low ESR
and the chemistry limits of the selected capacitor tech-
nology. Ceramic capacitors provide low ESR, but the
capacitance and voltage rating (after derating) are
determined by the capacity needed to prevent V SAG
and V SOAR from causing problems during load tran-
sients. Generally, once enough capacitance is added to
meet the overshoot requirement, undershoot at the ris-
ing load edge is no longer a problem (see the V SAG and
V SOAR equations in the Transient Response section).
Thus, the output capacitor selection requires carefully
balancing capacitor chemistry limitations (capacitance
For a standard 300kHz application, the effective zero
frequency must be well below 95kHz, preferably below
50kHz. With these frequency requirements, standard
tantalum and polymer capacitors already commonly
used have typical ESR zero frequencies below 50kHz,
allowing the stability requirements to be achieved with-
out any additional current-sense compensation. In the
standard application circuit (Figure 1), the ESR needed
to support a 15mV P-P ripple is 15mV/(10A x 0.3) =
5m Ω . Two 330μF, 9m Ω polymer capacitors in parallel
provide 4.5m Ω (max) ESR and 1/(2 π x 330μF x 9m Ω ) =
53kHz ESR zero frequency. See Figure 10.
vs. ESR vs. voltage rating) and cost. See Figure 9.
Output Capacitor Stability Considerations
For Quick-PWM controllers, stability is determined by the
in-phase feedback ripple relative to the switching frequen-
IN
BST
C IN
PWR
INPUT
≥
cy, which is typically dominated by the output ESR. The
boundary of instability is given by the following equation:
f SW 1
π 2 π R EFF C OUT
R EFF = R ESR + R PCB + R COMP
where C OUT is the total output capacitance, R ESR is the
LX
PGND
MAX15035
FB
PWR
L1
C OUT
PWR
OUTPUT
R ESR C OUT ≥
total ESR of the output capacitors, R PCB is the parasitic
board resistance between the output capacitors and
feedback sense point, and R COMP is the effective resis-
tance of the DC- or AC-coupled current-sense compen-
AGND
AGND
STABILITY REQUIREMENT
1
2f SW
sation (see Figure 11).
Figure 9. Standard Application with Output Polymer or Tantalum
IN
BST
C IN
INPUT
PCB PARASITIC RESISTANCE-SENSE
RESISTANCE FOR EVALUATION
PWR
DH
L1
LX
OUTPUT
PGND
C COMP
0.1 μ F
C OUT
PWR
C LOAD
PWR
MAX15035
FB
PWR
R COMP
100 Ω
OUTPUT VOLTAGE REMOTELY
SENSED NEAR POINT OF LOAD
GND
AGND
PWR
STABILITY REQUIREMENT
R ESR C OUT ≥
1
2f SW
AND R COMP C COMP ≥
1
f SW
FEEDBACK RIPPLE IN PHASE WITH INDUCTOR CURRENT
Figure 10. Remote-Sense Compensation for Stability and Noise Immunity
22
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX15035EVKIT+ | 功能描述:电源管理IC开发工具 MAX15035 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 |
| MAX15036ATE/V+ | 功能描述:直流/直流开关转换器 2.2MHz 3A Buck wInt High-Side Switch 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 |
| MAX15036ATE/V+T | 功能描述:直流/直流开关转换器 2.2MHz 3A Buck wInt High-Side Switch 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 |
| MAX15036ATE+ | 功能描述:直流/直流开关转换器 2.2MHz 3A Buck wInt High-Side Switch 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 |
| MAX15036ATE+T | 功能描述:直流/直流开关转换器 2.2MHz 3A Buck wInt High-Side Switch 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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