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参数资料
| 型号： | MAX5906EEE+ |
| 厂商： | Maxim Integrated |
| 文件页数： | 18/24页 |
| 文件大小： | 633K |
| 描述： | IC HOT-SWAP CTRLR DUAL 16QSOP |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 100 |
| 类型： | 热交换控制器 |
| 应用： | 通用型，PCI Express? |
| 内部开关： | 无 |
| 电源电压： | 1 V ~ 13.2 V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 16-SSOP（0.154"，3.90mm 宽） |
| 供应商设备封装： | 16-QSOP |
| 包装： | 管件 |
Q
GATE
is the MOSFET total gate charge
I
GATE
is the gate charging/discharging current
In this case, the inrush current depends on the MOSFET
gate-to-drain capacitance (C
rss
) plus any additional
capacitance from gate to GND (C
GATE
), and on any
load current (I
LOAD
) present during the startup period.
Example: Charging and discharging times using the
Fairchild FDB7030L MOSFET
If V
IN1
= 5V then GATE1 charges up to 10.4V (V
IN1
+
V
DRIVE
), therefore V
GATE
= 10.4V. The manufacturers
data sheet specifies that the FDB7030L has approxi-
mately 60nC of gate charge and C
rss
= 600pF. The
MAX5904MAX5909 have a 100礎 gate-charging cur-
rent and a 100礎 weak discharging current or 3mA
strong discharging current.
C
BOARD
= 6礔 and the load does not draw any current
during the startup period.
With no gate capacitor the inrush current, charge, and
discharge times are:
With a 22nF gate capacitor the inrush current, charge,
and discharge times are:
Case B: Fast Turn-On (With Current Limit)
In applications where the board capacitance (C
BOARD
)
is high, the inrush current causes a voltage drop across
R
SENSE
that exceeds the startup fast-comparator
threshold. The fast comparator regulates the voltage
across the sense resistor to V
SU,TH
. This effectively
regulates the inrush current during startup. In this case,
the current charging C
BOARD
can be considered con-
stant and the turn-on time is:
The maximum inrush current in this case is:
Figures 28 show the waveforms and timing diagrams
for a startup transient with current regulation. (See the
Typical Operating Characteristics.) When operating
under this condition, an external gate capacitor is not
required.
ON Comparator
The ON comparator controls the on/off function of the
MAX5904MAX5909. ON is the input to a precision
three-level voltage comparator that allows individual
control over channel 1 and channel 2. Drive ON high
(> 2.025V) to enable channel 1 and channel 2. Pull ON
low (<0.4V) to disable both channels. To enable chan-
nel 1 only, V
ON
must be between the channel 1 ON
threshold (0.825V) and the channel 2 ON threshold
(2.025V). The device can be turned off slowly, reducing
inductive kickback, by forcing ON between 0.4V and
0.825V until the gates are discharged. The ON com-
parator is ideal for power sequencing (Figure 11).
Note that a minimum RC time delay of 20祍 is applied
to the steeply rising voltage at IN_ before the input volt-
age reaches the ON_ terminal. This allows internal cir-
cuits to stabilize prior to the signal arriving at the ON_
terminal.
Uncommitted Comparator
The MAX5906MAX5909 feature an uncommitted com-
parator that increases system flexibility. This compara-
tor can be used for voltage monitoring, or for
generating a power-on reset signal for on-card micro-
processors (Figure 12).
The uncommitted comparator output (OUTC) is open
drain and is pulled low when the comparator input volt-
age (V
INC+
) is below its threshold voltage (1.236V).
I
V
R
INRUSH
SUTH
SENSE
=
,
t
C
V R
V
ON
BOARD
IN
SENSE
SUTH
=
?nbsp ?/DIV>
,
I
F
pF
nF
A
mA
t
nF
V
nC
A
ms
t
nF
V
nC
A
ms
t
nF
V
nC
mA
ms
INRUSH
CHARGE
DISCHARGE SLOW
DISCHARGE FAST
=
?/DIV>
+
?nbsp ?nbsp + =
=
?/DIV>
+
?/DIV>
=
=
?/DIV>
+
?/DIV>
=
=
?/DIV>
+
=
6
600
22
100
0 26 5
22 10 4 60
100
2 89
22 10 4 60
100
2 89
22 10 4 60
3
0 096
.
.
.
.
.
.
.
_
_
I
F
pF
A
A
t
V
nC
A
ms
t
V
nC
A
ms
t
V
nC
mA
ms
INRUSH
CHARGE
DISCHARGE SLOW
DISCHARGE FAST
=
?/DIV>
+
?nbsp ?nbsp + =
=
?/DIV>
+
?/DIV>
=
=
?/DIV>
+
?/DIV>
=
=
?/DIV>
+
=
6
600
0
100
0 1
0 10 4 60
100
0 6
0 10 4 60
100
0 6
0 10 4 60
3
0 02
.
.
.
.
.
.
_
_
I
C
C
C
I
I
INRUSH
BOARD
rss
GATE
GATE LOAD
=
+
?/DIV>
+
Low-Voltage, Dual Hot-Swap Controllers/Power
Sequencers
18 ______________________________________________________________________________________
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX5906EEE+ | 功能描述:热插拔功率分布 13.2V Hot-Swap Controller RoHS:否 制造商:Texas Instruments 产品:Controllers & Switches 电流限制: 电源电压-最大:7 V 电源电压-最小:- 0.3 V 工作温度范围: 功率耗散: 安装风格:SMD/SMT 封装 / 箱体:MSOP-8 封装:Tube |
| MAX5906EEE+T | 功能描述:热插拔功率分布 13.2V Hot-Swap Controller RoHS:否 制造商:Texas Instruments 产品:Controllers & Switches 电流限制: 电源电压-最大:7 V 电源电压-最小:- 0.3 V 工作温度范围: 功率耗散: 安装风格:SMD/SMT 封装 / 箱体:MSOP-8 封装:Tube |
| MAX5906EEE-T | 功能描述:热插拔功率分布 RoHS:否 制造商:Texas Instruments 产品:Controllers & Switches 电流限制: 电源电压-最大:7 V 电源电压-最小:- 0.3 V 工作温度范围: 功率耗散: 安装风格:SMD/SMT 封装 / 箱体:MSOP-8 封装:Tube |
| MAX5906UEE | 功能描述:热插拔功率分布 RoHS:否 制造商:Texas Instruments 产品:Controllers & Switches 电流限制: 电源电压-最大:7 V 电源电压-最小:- 0.3 V 工作温度范围: 功率耗散: 安装风格:SMD/SMT 封装 / 箱体:MSOP-8 封装:Tube |
| MAX5906UEE+ | 功能描述:热插拔功率分布 13.2V Hot-Swap Controller RoHS:否 制造商:Texas Instruments 产品:Controllers & Switches 电流限制: 电源电压-最大:7 V 电源电压-最小:- 0.3 V 工作温度范围: 功率耗散: 安装风格:SMD/SMT 封装 / 箱体:MSOP-8 封装:Tube |
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