參數(shù)資料
型號(hào): PM6652TR
廠(chǎng)商: STMICROELECTRONICS
元件分類(lèi): 穩(wěn)壓器
英文描述: SWITCHING CONTROLLER, 600 kHz SWITCHING FREQ-MAX, QCC32
封裝: 5 X 5 MM, 1 MM HEIGHT, 0.50 MM PITCH, ROHS COMPLIANT, VFQFPN-32
文件頁(yè)數(shù): 31/53頁(yè)
文件大?。?/td> 2519K
代理商: PM6652TR
PM6652
Device description
Doc ID 16867 Rev 3
37/53
Equation 18
given
δV
LKG the voltage drop across the current sensing filter resistor, due to the CSNS pin
leakage current (see Equation 13) and
δR
TH/RSNS the current sensing element variation due
to temperature increase.
If the current monitoring function is not required, IMONFB should be connected to SVCC
and IMON can be left floating.
CFILT (Figure 39) can be required by the CPU/GPU in order to filter the current monitor
ripple due to inductor current ripple.
Equation 19
A typical value for CFILT is 47 nF or bigger (IMVP6.5 specifications suggest
CFILT*RIMON>=300 s).
The IMON voltage is limited to 1.15 V (maximum value), as required by IMVP6.5
specifications, in order to avoid any damage to the CPU. This feature is performed by
limiting the current injected by the PM6652 IMON pin into RIMON resistor.
Figure 39.
Current monitor with external components
8.10.3
Thermal throttling
The voltage regulator thermal throttling function is used by the CPU in order to avoid
catastrophic thermal damage.
VRTT# open-drain output pin is forced down when the THERM voltage is lower than an
internal threshold (1.0 V typ. and 200 mV hysteresis). An external NTC resistor, placed near
δ
+
+
δ
=
δ
SNS
TH
AVCL
SNS
LKG
AVCL
WC
,
AVCL
R
I
R
G
V
I
DCR
IMON
FILT
R
L
R
C
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