AMC DOC. #: AMC431_C
AMC431
November
2002
PRECISION ADJUSTABLE SHUNT
VOLTAGE REGULATORS
Copyright
2002, ADD Microtech Corp.
2
www.addmtek.com
TYPICAL APPLICATION
BLOCK DIAGRAM
5V Precision Regulator
+
-
ABSOLUTE MAXIMUM RATINGS
(Note 1)
Cathode to Anode Voltage (V
KA) (Note 2)
-0.3V to 37V
Continuous Cathode Current (I
K)
-100mA to 150mA
Reference Input Current (I
REF)
-50uA to 10mA
Maximum junction temperature range, TJ
150°C
Storage temperature range
-65
OC to 150OC
Lead temperature (soldiering, 10 seconds)
260°C
Note 1:
Exceeding these ratings could cause damage to the device.
All voltages are with respect to Ground.
Currents are positive into, negative out of the specified terminal.
Note 2:
Voltage values are with respect to the anode terminal unless otherwise noted.
POWER DISSIPATION TABLE
Package
θ
JA
(°C /W )
Derating factor DF(mW/°C)
TA ≥ 25°C
TA ≤ 25°C
Power rating(mW)
TA=70°C
Power rating(mW)
TA= 85°C
Power rating (mW)
DM
165
6.06
757
485
394
LP
156
6.41
801
513
417
PK
71(note)
14.1
1763
1128
916
DB
285
3.5
438
280
228
Note :
1.
For PK package, Thermal Resistance-Junction to Tab (
θ
JT ) = 35°C /W. TJ = TTAB + (PD × θJT).
P
D: Power Dissipation.
2.
θ
JA: Thermal Resistance-Junction to Ambient,
DF = 1/θ
JA
Junction Temperature Calculation:
T
J = T
A + (PD × θJA).
The
θ
JA numbers are guidelines for the thermal performance of the device/PC-board system.
All of the above assume no ambient airflow.
CATHODE
ANODE
REF
VREF
R2
27.5K
0.1%
R1
27.5K
0.1%
Rb
V+
VO = 5V
Note: Rb should
provide cathode
current
≥ 1mA