参数资料
型号: MAX17480GTL+T
厂商: Maxim Integrated Products
文件页数: 35/48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)
AMD 2-/3-Output Mobile Serial
VID Controller
PSI_L
PULSE-SKIPPING MODE
SVC/SVD
BUS IDLE
2-BIT BOOT VID, SVC/SVD INPUTS DISABLED
BUS IDLE
SMPS V OUT
(HIGH DAC TARGET)
(LOW DAC TARGET)
SMPS V OUT
PGD_IN
PWRGD
TARGET
BLANK
V OUT
BLANK
HIGH-Z
20 μ s
HIGH-Z
20 μ s
Figure 9. PGD_IN Timing
R PTC1
V CC
V CC
PLACE R NTC NEXT TO THE
HOTTEST POWER COMPONENT.
R THRM
THRM
MAX17480
PLACE R PTC1 , R PTC2 , AND R PTC3
NEXT TO THE RESPECTIVE SMPS'S
R PTC2
R PTC3
THRM
MAX17480
R NTC
Figure 10. THRM Configuration
GND
POWER COMPONENT.
R THRM
GND
Shutdown
When SHDN goes low, the MAX17480 enters shutdown
mode. PWRGD is pulled low immediately and forces all
DH and DL low, and all three outputs are discharged
through the 20 ? internal discharge FETs through the CSN
pin for core SMPSs and through the OUT3 pin for NB
SMPSs.
VRHOT Temperature Comparator
The MAX17480 features an independent comparator with
an accurate threshold (V HOT ) that tracks the analog sup-
ply voltage (V HOT = 0.3V CC ). Use a resistor- and thermis-
tor-divider between V CC and GND to generate a
voltage-SMPS overtemperature monitor. Place the thermis-
tor as close as possible to the MOSFETs and inductors.
Place three individual thermistors near to each SMPS to
monitor the temperature of the respective SMPS. When
core SMPSs are in combined-mode operation, the cur-
rent-balance circuit balances the currents between
core SMPS phases. As such, the power loss and heat
in each phase should be identical, apart from the
effects of placement and airflow over each phase.
Single thermistors can be placed near either of the
phases and still be effective for core SMPS temperature
monitoring, and one thermistor can be saved. See
Figure 10.
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