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参数资料
| 型号： | MAX1954AEUB+T |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 16/18页 |
| 文件大小： | 0K |
| 描述： | IC REG CTRLR BUCK PWM CM 10-UMAX |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 2,500 |
| PWM 型： | 电流模式 |
| 输出数： | 1 |
| 频率 - 最大： | 360kHz |
| 占空比： | 93% |
| 电源电压： | 3 V ~ 13.2 V |
| 降压： | 是 |
| 升压： | 无 |
| 回扫： | 无 |
| 反相： | 无 |
| 倍增器： | 无 |
| 除法器： | 无 |
| Cuk： | 无 |
| 隔离： | 无 |
| 工作温度： | -40°C ~ 85°C |
| 封装/外壳： | 10-TFSOP，10-MSOP（0.118"，3.00mm 宽） |
| 包装： | 带卷 (TR) |
Low-Cost, Current-Mode PWM Buck
Controller with Foldback Current Limit
G EA ( fC ) = g mEA × R C × zMOD
The error-amplifier gain at f C is:
R C is then calculated as:
f
f C
2) Place the MOSFETs ’ decoupling capacitors as
close as possible and place them directly across
from the high-side MOSFET drain and the low-side
MOSFET source.
3) Input and output capacitors are connected to the
power-ground plane; all other capacitors are con-
nected to the signal-ground plane.
R C =
V OUT
V FB
×
g mEA × f zMOD × G MOD ( fC )
f C
4) Keep the high-current paths as short as possible.
5) Connect the drain leads of the power MOSFET to a
C C = LOAD
C C and C f can then be calculated as:
R × f S × L × C OUT
( R LOAD + f S × L ) × R C
large copper area to help cool the device. Refer to
the power MOSFET data sheet for recommended
copper area.
6) Connect HSD directly to the drain leads of the high-
side MOSFET.
C f =
1
2 π × R C × f zMOD
7) Connect LX directly to the drain of the low-side
MOSFET.
Applications Information
See Table 2 for suggested manufacturers of the com-
ponents used with the MAX1954A.
PC Board Layout Guidelines
Careful PC board layout is critical to achieve low
switching losses and clean, stable operation. The
switching power stage requires particular attention.
Follow these guidelines for good PC board layout:
1) Place IC decoupling capacitors as close as possible
to IC pins. Keep separate the power-ground plane
(connected to pin 7) and the signal-ground plane
(connected to pin 4). The IN pin has two decoupling
capacitors. One connects to pin 7 and one connects
to pin 4.
Table 2. Suggested Manufacturers
8) Place the low-side MOSFET so that its source is as
close as possible to pin 7.
9) Ensure all feedback connections are short and
direct. Place the feedback resistors as close as
possible to the IC.
10) Route high-speed switching nodes away from sen-
sitive analog areas (FB, COMP).
11)The trace length from the gates of the low-side and
high-side MOSFETs to DH and DL should be no
longer than 700 mils.
To aid design, a sample layout is available in the
MAX1954A evaluation kit.
MANUFACTURER
Central Semiconductor
Coilcraft
Fairchild
Kemet
Panasonic
Taiyo Yuden
TOKO
COMPONENT
Diodes
Inductors
MOSFETs
Capacitors
Capacitors
Capacitors
Inductors
PHONE
631-435-1110
800-322-2645
800-341-0392
864-963-6300
714-373-7366
408-573-4150
800-745-8656
WEBSITE
www.centralsemi.com
www.coilcraft.com
www.fairchildsemi.com
www.kemet.com
www.panasonic.com
www.t-yuden.com
www.toko.com
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX1954AEUB-TG05 | 功能描述:电流型 PWM 控制器 RoHS:否 制造商:Texas Instruments 开关频率:27 KHz 上升时间: 下降时间: 工作电源电压:6 V to 15 V 工作电源电流:1.5 mA 输出端数量:1 最大工作温度:+ 105 C 安装风格:SMD/SMT 封装 / 箱体:TSSOP-14 |
| MAX1954AEUB-TG077 | 功能描述:电流型 PWM 控制器 RoHS:否 制造商:Texas Instruments 开关频率:27 KHz 上升时间: 下降时间: 工作电源电压:6 V to 15 V 工作电源电流:1.5 mA 输出端数量:1 最大工作温度:+ 105 C 安装风格:SMD/SMT 封装 / 箱体:TSSOP-14 |
| MAX1954AEVKIT | 功能描述:电流型 PWM 控制器 Evaluation Kit for the MAX1954A RoHS:否 制造商:Texas Instruments 开关频率:27 KHz 上升时间: 下降时间: 工作电源电压:6 V to 15 V 工作电源电流:1.5 mA 输出端数量:1 最大工作温度:+ 105 C 安装风格:SMD/SMT 封装 / 箱体:TSSOP-14 |
| MAX1954BEUB | 功能描述:电流型 PWM 控制器 RoHS:否 制造商:Texas Instruments 开关频率:27 KHz 上升时间: 下降时间: 工作电源电压:6 V to 15 V 工作电源电流:1.5 mA 输出端数量:1 最大工作温度:+ 105 C 安装风格:SMD/SMT 封装 / 箱体:TSSOP-14 |
| MAX1954BEUB+ | 功能描述:电流型 PWM 控制器 Current-Mode PWM Buck Controller RoHS:否 制造商:Texas Instruments 开关频率:27 KHz 上升时间: 下降时间: 工作电源电压:6 V to 15 V 工作电源电流:1.5 mA 输出端数量:1 最大工作温度:+ 105 C 安装风格:SMD/SMT 封装 / 箱体:TSSOP-14 |
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