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| 型号： | MAX17482GTL+T |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 14/48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
Typical Operating Characteristics (continued)
(Circuit of Figure 1. V IN = 12V, V CC = V DD = 5V, SHDN = V CC , D0–D6 set for 1.075V, T A = +25°C, unless otherwise specified.)
BIAS SUPPLY REMOVAL
OUTPUT OVERVOLTAGE WAVEFORM
MAX17021 toc23
(UVLO RESPONSE)
MAX17021 toc24
0.875V
A
5V
A
0.875V
0
B
5V
0
B
0
5V
0
C
5V
5V
0
C
0
10A
D
E
0
100 μ s/div
40 μ s/div
A. V OUT , 500mV/div
B. DL_, 5V/div
C. PWRGD, 5V/div
A. 5V BIAS SUPPLY, 5V/div
B. V OUT , 500mV/div
C. PWRGD, 5V/div
D. DL_, 5V/div
E. I LX1 , 10A/div
I OUT = 10A
Pin Description
PIN
1
2
3
NAME
PGDIN
THRM
IMON
(MAX17082/
MAX17482
only)
FUNCTION
System Power-Good Logic Input. PGDIN indicates the power status of other system rails and is used for
power-supply sequencing. After power-up to the boot voltage, the output voltage remains at V BOOT , CLKEN
remains high, and PWRGD remains low as long as the PGDIN stays low. When PGDIN is pulled high, the
output transitions to selected VID voltage, and CLKEN is pulled low. If the system pulls PGDIN low during
normal operation, the MAX17021/MAX17082/MAX17482 immediately drive CLKEN high, pull PWRGD low,
and slew the output to the boot voltage (using two-phase pulse-skipping mode). The controller remains at
the boot voltage until PGDIN goes high again, SHDN is toggled, or the V CC input power supply is cycled.
Input of Internal Comparator. Connect the output of a resistor- and thermistor-divider (between V CC and
GND) to THRM. Select the components such that the voltage at THRM falls below 1.5V (30% of V CC ) at
the desired high temperature.
Current-Monitor Output. The MAX17082/MAX17482 IMON output source a current that is directly
proportional to the current-sense voltage as defined by:
I IMON = G m(IMON) x (V CSP_ - V CSN_ )
where G m(IMON) = 2.4mS (typ).
The IMON current is unidirectional (sources current out of IMON only) for positive current-sense values.
For negative current-sense voltages, the IMON current is zero.
Connect an external resistor between IMON and VSS_SENSE to create the desired IMON gain based on
the following equation:
R IMON = 0.999V/(IMAX x R SENSE x G m(IMON) )
where IMAX is defined in the Current Monitor section of the Intel IMVP-6.5 specification and based on
discrete increments (20A, 30A, 40A, etc.), R SENSE is the typical effective value of the current-sense
element (sense resistor or inductor DCR) that is used to provide the current-sense voltage, and
G m(IMON) is the typical transconductance amplifier gain as defined in the Electrical Characteristics
table.
The IMON voltage is internally clamped to a maximum of 1.1V (typ).
The transconductance amplifier and voltage clamp are internally compensated, so IMON cannot directly
drive large capacitance values. To filter the IMON signal, use an RC filter as shown in Figure 2.
IMON is pulled to ground when MAX17082/MAX17482 are in shutdown.
14
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