AMS1503 Advanced Monolithic Systems, AMS1503 Datasheet
AMS1503
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AMS1503 Summary of contents
Page 1
... Adjust pin is recommended. The AMS1503 series are ideal for generating power supplies where both 5V and 3.3V supplies are available. The AMS1503 devices are offered in 5 lead TO-220 and TO-263 (plastic DD) packages and in the 7 lead TO-220 package. ...
Page 2
... AMS1503-5.0 Line Regulation AMS1503/-1.5/-2.5/ -2.85/-3.0/-3.3/-3.5/-5.0 Load Regulation AMS1503/-1.5/-2.5/ -2.85/-3.0/-3.3/-3.5/-5.0 Minimum Load AMS1503 Current Control Pin Current AMS1503/-1.5/-2.5/ (Note 4) -2.85/-3.0/-3.3/-3.5/-5.0 Ground Pin Current AMS1503-1.5/-2.5/-2.85/ (Note 4) -3.0/-3.3/-3.5/-5.0 Adjust Pin Current AMS1503 Current Limit AMS1503/-1.5/-2.5/ -2.85/-3.0/-3.3/-3.5/-5.0 Ripple Rejection AMS1503/-1.5/-2.5/ -2.85/-3.0/-3.3/-3.5/-5.0 Thermal Regulation AMS1503 Thermal Resistance Junction-to-Case Advanced Monolithic Systems ...
Page 3
... OUT SENSE Note 3: The dropout voltage for the AMS1503 is caused by either minimum control voltage or minimum power voltage. The specifications represent the minimum input/output voltage required to maintain 1% regulation. Note 4: For the adjustable device the minimum load current is the minimum current required to maintain regulation. Normally the current in the resistor divider used to set the output voltage is selected to meet the minimum load current requirement ...
Page 4
... If power input comes up first the output will not turn on at all until the control voltage comes up. The output can never come up unregulated. By tying the control and power inputs together the AMS1503 can also be operated as a single supply device. In single supply operation the dropout will be determined by the minimum control voltage. ...
Page 5
... Stability The circuit design used in the AMS1503 series requires the use of an output capacitor as part of the device frequency compensation. The addition of F aluminum electrolytic solid 150 tantalum on the output will ensure stability for all operating conditions ...
Page 6
... ADJ Figure 6. Optional Clamp Diodes Protect Against Input Crowbar Circuits If the AMS1503 is connected as a single supply device with the control and power input pins shorted together the internal diode between the output and the power input pin will protect the control input pin. As with any IC regulator, none the protection ...
Page 7
... Minimum Control Voltage 125° OUTPUT CURRENT (A) 50 V/DIV LOAD 100 125 150 6680B Sierra Lane, Dublin, CA 94568 Phone (925) 556-9090 Fax (925) 556-9140 AMS1503 Dropout Voltage - Minimum Power Voltage 1.0 0 25° OUTPUT CURRENT (A) ...
Page 8
... TYP 0.330-0.370 (8.382-9.398) 0.199-0.218 (5.05-5.54 ) 0.032 (0.81) TYP 6680B Sierra Lane, Dublin, CA 94568 Phone (925) 556-9090 Fax (925) 556-9140 AMS1503 0.170-0.190 (4.32-4.82) 0.045-0.055 (1.143-1.397) 0.013-0.023 (0.330-0.584) 0.105 TYP (2.67) T (TO-220 ) AMS DRW# 042194 ...
Page 9
... Sierra Lane, Dublin, CA 94568 Phone (925) 556-9090 Fax (925) 556-9140 AMS1503 (Continued). 0.165-0.180 (4.191-4.572) 0.045-0.055 (1.143-1.397) 0.013-0.023 (0.330-0.584) 0.095-0.115 (2 ...