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Copyright © 2005 ADD Microtech Corp.
3
AMC2596_A (LF) May 2005
AMC2596
THERMAL DATA
P,PB, DD PACKAGE:
Thermal Resistance-Junction to Tab, θJT
3.0°C /W
Thermal Resistance-Junction to Ambient, θJA
45°C /W
Junction Temperature Calculation:
TJ = TA+ (PD × θ JA). The θJA numbers are guidelines for the thermal performance of the device/pc-board
system. All of the above assume no ambient airflow.
BLOCK DIAGRAM
VIN 1
2
4
3
5
FB
GND
VOUT
Regulator
With
Enable
Comparator
150KHz
Oscillator
Driver
Thermal Shutdown
&
Current Limit
ENABLE
Reset
1.23V
Reference
R1*
R2*
Error
Amplifier
VOUT = 3.3V
: R2/R1 = 1.7
VOUT = 5.0V
: R2/R1 = 3.1
VOUT = Adjustable : R2 = 0, R1 = Open