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参数资料
| 型号： | MAX17480GTL+T |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 32/48页 |
| 文件大小： | 0K |
| 描述： | IC CTRLR SERIAL VID 40-TQFN |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 2,500 |
| 应用： | 处理器 |
| 电流 - 电源： | 5mA |
| 电源电压： | 4.5 V ~ 5.5 V |
| 工作温度： | -40°C ~ 105°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 40-WFQFN 裸露焊盘 |
| 供应商设备封装： | 40-TQFN-EP（5x5） |
| 包装： | 带卷 (TR) |
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AMD 2-/3-Output Mobile Serial
VID Controller
INPUT (V IN )
C IN
DH_
N H
SENSE RESISTOR
LX_
DL_
N L
D L
L
L ESL
R EQ
R SENSE
C EQ
C OUT
C EQ R EQ =
L ESL
R SENSE
MAX17480
CSP_
CSN_
A) OUTPUT SERIES RESISTOR SENSING
INPUT (V IN )
C IN
DH_
N H
INDUCTOR
L R DCR
R CS =
R2
R1 + R2
× R DCR
LX_
DL_
N L
D L
R LX
R1
R2
C OUT
R DCR =
L
C EQ
×
1
R1
+
1
R2
MAX17480
CSP_
CSN_
C LX
C EQ
FOR THERMAL COMPENSATION:
R2 SHOULD CONSIST OF AN NTC RESISTOR
IN SERIES WITH A STANDARD THIN-FILM
RESISTOR.
B) LOSSLESS INDUCTOR DCR SENSING
Figure 7. Current-Sense Configurations
L ESL
R SENSE
= R EQ C SENSE
the current-sense inputs’ bias current (I CSP and I CSN ),
choose R EQ less than 2k ? and use the above equation
to determine the sense capacitance (C SENSE ). Choose
= R EQ C SENSE
where L ESL is the equivalent series inductance of the
current-sense resistor, R SENSE is current-sense resis-
tance value, and C SENSE and R EQ are the time-con-
stant matching components.
Using the DC resistance (R DCR ) of the output inductor
allows higher efficiency. In this configuration, the initial
tolerance and temperature coefficient of the inductor’s
DCR must be accounted for in the output-voltage
droop-error budget and power monitor. This current-
sense method uses an RC filtering network to extract
the current information from the output inductor (see
Figure 7). The time constant of the RC network should
match the inductor’s time constant (L/R DCR ):
L
R DCR
where C SENSE and R EQ are the time-constant matching
components. To minimize the current-sense error due to
capacitors with 5% tolerance and resistors with 1% tol-
erance specifications. Temperature compensation is
recommended for this current-sense method. See the
Core Voltage Positioning and Loop Compensation sec-
tion for detailed information.
Additional R LX and C LX are always added between the
LX_ and CSP_ pins if DCR sensing is used, and they
provide additional overdrive to the current-sense signal
to improve the noise immunity; otherwise, there might
be too much jitter or the system could be unstable.
NB SMPS Current Sense
The NB current sense is achieved by sensing the volt-
age across the high-side internal MOSFET during the
on-time. The current information is computed by dividing
the sensed voltage by the MOSFET’s on-resistance,
R ON(NH3) .
32
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| MAX17482GTL+ | 功能描述:电压模式 PWM 控制器 NDA IC 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 |
| MAX17482GTL+T | 功能描述:电压模式 PWM 控制器 NDA IC 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 |
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