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参数资料
| 型号： | MAX8545EUB+ |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 14/18页 |
| 文件大小： | 0K |
| 描述： | IC REG CTRLR BUCK PWM VM 10-UMAX |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 50 |
| PWM 型： | 电压模式 |
| 输出数： | 1 |
| 频率 - 最大： | 360kHz |
| 占空比： | 95% |
| 电源电压： | 2.7 V ~ 28 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： | 管件 |
Low-Cost, Wide Input Range, Step-Down
Controllers with Foldback Current Limit
V IN
RAMP
DH
N
GENERATOR
PWM
LX
L
V OUT
DL
N
R3
C OUT
FB
R2
COMP/EN
ERROR
AMPLIFIER
R4
C10
MAX8545
0.8V
MAX8546
MAX8548
Figure 3. Compensation Scheme
ground terminals flush against one another. Follow these
guidelines for good PCB layout:
1) Keep the high-current paths short, especially at the
ground terminals. This practice is essential for sta-
ble, jitter-free operation.
2) Connect the power and analog grounds close to
the IC pin 7.
3) Keep the power traces and load connections short.
This practice is essential for high efficiency. Using
thick copper PCBs (2oz vs. 1oz) can enhance full-
load efficiency by 1% or more. Correctly routing
PCB traces is a difficult task that must be
approached in terms of fractions of centimeters,
where a few milohms of excess trace resistance
cause a measurable efficiency penalty.
4) LX and GND connections to the low-side MOSFET
for current sensing must be made using Kelvin
sense connections to guarantee the current-limit
accuracy. With 8-pin MOSFETs, this is best done
by routing power to the MOSFETs from outside
using the top copper layer, while connecting LX
and GND inside (underneath) the 8-pin package.
5) When tradeoffs in trace lengths must be made, it is
preferable to allow the inductor charging current
path to be longer than the discharge path. For
example, it is better to allow some extra distance
between the inductor and the low-side MOSFET or
between the inductor and the output filter capacitor.
6) Ensure that the connection between the inductor
and C3 is short and direct.
7) Route switching nodes (BST, LX, DH, and DL) away
from sensitive analog areas (COMP and FB).
Ensure the C1 ceramic bypass capacitor is immediately
adjacent to the pins and as close to the device as possi-
ble. Furthermore, the V IN and GND pins of MAX8545/
MAX8546/MAX8548 must terminate at the two ends of
C1 before connecting to the power switches and C2.
14
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX8545EUB+ | 功能描述:电压模式 PWM 控制器 Wide Input Range Step-Down Controller RoHS:否 制造商:Texas Instruments 输出端数量:1 拓扑结构:Buck 输出电压:34 V 输出电流: 开关频率: 工作电源电压:4.5 V to 5.5 V 电源电流:600 uA 最大工作温度:+ 125 C 最小工作温度:- 40 C 封装 / 箱体:WSON-8 封装:Reel |
| MAX8545EUB+T | 功能描述:电压模式 PWM 控制器 Wide Input Range Step-Down Controller RoHS:否 制造商:Texas Instruments 输出端数量:1 拓扑结构:Buck 输出电压:34 V 输出电流: 开关频率: 工作电源电压:4.5 V to 5.5 V 电源电流:600 uA 最大工作温度:+ 125 C 最小工作温度:- 40 C 封装 / 箱体:WSON-8 封装:Reel |
| MAX8545EUB-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 |
| MAX8545EUB-TG069 | 制造商:Rochester Electronics LLC 功能描述: 制造商:Maxim Integrated Products 功能描述: |
| MAX8546EUB | 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 |
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