ADM663 Analog Devices, ADM663 Datasheet
ADM663
Available stocks
Related parts for ADM663
ADM663 Summary of contents
Page 1
... The ADM663A/ADM666A are pin compatible enhancements for the ADM663/ADM666. Improvements include an addi- tional 3.3 V output range, higher output current, and operation with a small output capacitor. The ADM663A/ADM666A are available in an 8-pin DIP and narrow surface mount (SOIC) packages. *Patent pending. REV. 0 Information furnished by Analog Devices is believed to be accurate and reliable ...
Page 2
... (ADM663A) Pin (GND – 0 (ADM666A) Pin (GND – 0 +16.5 V Output Source Current (ADM663A, ADM666A) Pin 100 mA (ADM663A) Pin Output Sink Current, Pin –20 mA Power Dissipation, N 800 mW (Derate 8.3 mW/ C above + Thermal Impedance . . . . . . . . . . . . . . . . . . . . . . 120 C/W ...
Page 3
... Sense Input Threshold: Current limit sense voltage. This is the voltage (referenced to V occurs. Input-Output Saturation Resistance (ADM663A): This is a measure of the internal MOS transistor effective resistance in se- ries with V OUT1 at low currents may be calculated by multiplying the load cur- rent by the saturation resistance ...
Page 4
... The ADM663A/ADM666A contains a micropower bandgap reference voltage source; an error amplifier, A1; three compara- tors, C1, C2, C3, and a series pass output transistor. A P-chan- nel FET and an NPN transistor are used on the ADM663A while the ADM666A uses an NPN output transistor. CIRCUIT DESCRIPTION The internal bandgap reference is trimmed to 1.3 V This is used as a reference input to the error amplifier A1 ...
Page 5
... NPN transistor. Fig- ure 7 shows a configuration which can be used to provide +5 V with boosted current drive the maximum the current at 0 SHUTDOWN Figure 7. ADM663A Boosted Output Current (0.5 A) –5– ADM663A/ADM666A V BATT 1.3 V for R4. ...
Page 6
... SET Figure 9. Low Current, Low Dropout Configuration Thermal Considerations The ADM663A/ADM666A can supply up to 100 mA load cur- rent and can operate with input voltages up to 16.5 V, but the package power dissipation and hence the die temperature must be kept within the maximum limits. The package power dissi- pation is calculated from the product of the voltage differential across the regulator times the current being supplied to the load ...
Page 7
... C. The resistor value is calculated 4/0 resistor power rating of 400 mW or greater may be used. Bypass Capacitors The high frequency performance of the ADM663A/ADM666A may be improved by decoupling the ouput using a filter capaci- tor. A capacitor of 0 suitable. Typical Performance Characteristics 0.01 0 100 FREQUENCY – ...
Page 8
... ADM663A/ADM666A 0.160 (4.06) 0.115 (2.93) OUTLINE DIMENSIONS Dimensions shown in inches and (mm). 8-Pin Plastic DIP (N- 0.280 (7.11) PIN 1 0.240 (6.10 0.325 (8.25) 0.430 (10.92) 0.300 (7.62) 0.348 (8.84) 0.060 (1.52) 0.210 0.015 (0.38) (5.33) MAX 0.150 0.015 (0.381) (3.81) 0.008 (0.204) MIN SEATING 0.022 (0.558) 0.100 0.070 (1.77) PLANE (2.54) 0.014 (0.356) 0.045 (1.15) BSC ...
Page 9
... ORDERING GUIDE Temperature Model Range ADM663AAN – +85 C ADM663AAR – +85 C ADM666AAN – +85 C ADM666AAR – +85 C *For outline information see Package Information section. REV. 0 Package Option* N-8 R-8 N-8 R-8 –9– ADM663A/ADM666A ...