AMC317 Datasheet, PDF (2/7 Pages) List of Unclassifed Manufacturers – 1.5A / 3- TERMINAL ADJUSTABLE REGULATOR

V_IN
C_IN
0.1µF
TYPICAL APPLICATION
AMC317
ADJ
R1
240Ω
R2
5K
V_OUT
C_OUT
1µF
AMC317
Note 1: C_IN is required if the regulator is far from the filter capacitor.
Note 2: C_OUT is recommended to improve the transient response.
Note 3: V_OUT = 1.25V
R2
( 1 + _R1 ) + IADJ (R2)
ABSOLUTE MAXIMUM RATINGS (Note 1)
Input-Output Differential Voltage V_D ……………..…………………………………………………………..20V
Operating Junction temperature
Plastic (T, ST Package) …………………………………………………………………………………… 150°C
Storage Temperature Range ………………………………………………………………………. -65°C to 150°C
Lead temperature (Soldering, 10 seconds) ………………………………………………………………….. 300°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.
THERMAL DATA
T, ST PACKAGE:
Thermal Resistance-Junction to Tab, θ_JT
Thermal Resistance-Junction to Ambient, θ_JA
Junction Temperature Calculation: T_J = T_A + (P_D × θ_JA).
The θ_JA numbers are guidelines for the thermal performance of the device/pc-board system.
All of the above assume no ambient airflow.
3.0°C /W
45°C /W
Maximum Power Calculation:
P_D(MAX)=
T_J(MAX) – T_A(MAX)
θ_JA
T_J(^OC): Maximum recommended junction temperature
T_A(^OC): Ambient temperature of the application
θ_JA(^OC/W): Junction-to-junction temperature thermal resistance of the package, and other heat dissipating materials.
The maximum power dissipation for a single-output regulator is :
P_D(MAX) = [(V_IN(MAX) - V_OUT(NOM))] × I_OUT(NOM) + V_IN(MAX) × I_Q
Where: V_OUT(NOM) = the nominal output voltage
I_OUT(NOM) = the nominal output current, and
I_Q = the quiescent current the regulator consumes at I_OUT(MAX)
V_IN(MAX) = the maximum input voltage
Then θ_JA = (150 ^OC – T_A)/P_D
Copyright © 2006 ADDtek Corp.
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DD011_G -- MARCH 2007