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参数资料
| 型号： | MAX17482GTL+T |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 26/48页 |
| 文件大小： | 0K |
| 描述： | IC CTLR PWM DUAL IMVP-6.5 40TQFN |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 2,500 |
| 系列： | Quick-PWM™ |
| 应用： | 控制器，Intel IMVP-6，IMVP-6.5? |
| 输入电压： | 4.5 V ~ 5.5 V |
| 输出数： | 1 |
| 输出电压： | 0.013 V ~ 1.5 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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Dual-Phase, Quick-PWM Controllers for
IMVP-6+/IMVP-6.5 CPU Core Power Supplies
Use the worst-case inductance and R DCR values pro-
vided by the inductor manufacturer, adding some mar-
gin for the inductance drop over temperature and load.
To minimize the current-sense error due to the current-
sense inputs’ bias current (I CSP _ and I CSN _), choose
R1||R2 to be less than 2k Ω and use the previous equa-
tion to determine the sense capacitance (C EQ ). Choose
capacitors with 5% tolerance and resistors with 1% tol-
resistor (see Figure 4). The ESL induced-voltage step
does not affect the average current-sense voltage, but
results in a significant peak current-sense voltage error
that results in unwanted offsets in the regulation voltage
and results in early current-limit detection. Similar to the
inductor DCR sensing method above, the RC filter’s time
constant should match the L/R time constant formed by
the current-sense resistor’s parasitic inductance:
erance specifications. Temperature compensation is
recommended for this current-sense method. See the
Voltage Positioning and Loop Compensation section for
detailed information.
L ESL
R SENSE
= C EQ R 1
When using a current-sense resistor for accurate output-
voltage positioning, the circuit requires a differential RC
filter to eliminate the AC voltage step caused by the
equivalent series inductance (L ESL ) of the current-sense
where L ESL is the equivalent series inductance of the
current-sense resistor, R SENSE is current-sense resis-
tance value, and C EQ and R1 are the time-constant
matching components.
INPUT (V IN )
C IN
DH_
N H
SENSE RESISTOR
LX_
L
L ESL
R SENSE
MAX17021
MAX17082
MAX17482
DL_
N L
D L
C OUT
C EQ R1 =
L SENSE
R SENSE
PGND
R1
C EQ
CSP_
CSN_
A) OUTPUT SERIES RESISTOR SENSING
INPUT (V IN )
C IN
DH_
N H
INDUCTOR
)
MAX17021
MAX17082
LX_
DL_
N L
D L
R1
L
R DCR
R2
C OUT
R CS =
(
R2
R1 + R2
R DCR
[
+
MAX17482
PGND
R DCR =
L 1 1
C EQ R1 R2
]
CSP_
C EQ
CSN_
FOR THERMAL COMPENSATION:
R2 SHOULD CONSIST OF AN NTC RESISTOR IN
B) LOSSLESS INDUCTOR SENSING
Figure 4. Current-Sense Methods
SERIES WITH A STANDARD THIN-FILM RESISTOR.
26
______________________________________________________________________________________
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