ST10F276Z5 STMicroelectronics, ST10F276Z5 Datasheet - Page 179

• Manufacturer Part Number: ST10F276Z5
• Description: 16-BIT MICROCONTROLLER WITH MAC UNIT, UP TO 832 KBYTES FLASH MEMORY AND UP TO 68 KBYTES RAM
• Manufacturer: STMicroelectronics

Specifications of ST10F276Z5

• Single Voltage Supply: 5V ±10% (embedded regulator for 1.8 V core supply)

ST10F276Z5
23.3
Power considerations
The average chip-junction temperature, T
following equation:
Where:
T
Θ
P
P
P
Most often in applications, P
significant if the device is configured to continuously drive external modules and/or
memories.
An approximate relationship between P
Therefore (solving equations 1 and 2):
Where:
K is a constant for the particular part, which may be determined from equation (3) by
measuring P
are obtained by solving equations (1) and (2) iteratively for any value of T
Table 90.
Based on thermal characteristics of the package and with reference to the power
consumption figures provided in the next tables and diagrams, the following product
classification can be proposed. In any case, the exact power consumption of the device
inside the application must be computed according to different working conditions, thermal
profiles, real thermal resistance of the system (including printed circuit board or other
substrata) and I/O activity.
A
D
INT
I/O
JA
Symbol
is the Ambient Temperature in °C,
is the sum of P
is the Package Junction-to-Ambient Thermal Resistance, in °C/W,
represents the Power Dissipation on Input and Output Pins; user determined.
Θ
is the product of I
JA
D
Thermal characteristics
Thermal resistance junction-ambient
PQFP 144 - 28 x 28 x 3.4 mm / 0.65 mm pitch
LQFP 144 - 20 x 20 mm / 0.5 mm pitch
LQFP 144 - 20 x 20 mm / 0.5 mm pitch on four layer
FR4 board (2 layers signals / 2 layers power)
(at equilibrium) for a known T
INT
and P
DD
and V
K = P
I/O
I/O
< P
(P
DD
D
Description
P
D
x (T
T
, expressed in Watt. This is the Chip Internal Power,
INT
D
J
= P
= K / (T
= T
,which may be ignored. On the other hand, P
A
INT
+ 273 °C) + Θ
D
A
and T
J
+ (P
+ P
, in degrees Celsius, is calculated using the
A.
J
+ 273 °C) (2)
I/O
D
Using this value of K, the values of P
J
x Θ
),
(if P
JA
I/O
JA
) 1)
x P
is neglected) is given by:
D
2
(3)
Value (typical)
Electrical characteristics
30
40
35
A
.
I/O
D
°C/W
may be
Unit
179/239
and T
J