adm1203 Analog Devices, Inc., adm1203 Datasheet
adm1203
Related parts for adm1203
adm1203 Summary of contents
Page 1
... Any number of these devices can be cascaded to form a multi supply tracking solution. The ADM1203 requires 2.7V to 16.5V on its Vcc pin to operate. An on-board charge pump generates a high voltage GATE drive to fully enhance FETs in the power path. ...
Page 2
... HOTSWAP > 2.2 V HOTSWAP µA µA V SLEW OUTFB V V 1000 V/s 10 µA Vcc V Vslew – Vout > 100mV µA Vout – Vslew > 100mV µA ADM1203-2 only –vgate = 3. – 2.7V GATE – 5.0V GATE – 16.5V GATE ...
Page 3
... Preliminary Technical Data Absolute Maximum Ratings Table 2. ADM1203 Absolute Maximum Ratings Parameter V Pin CC TIMER Pin UP/DOWNb, UP/STOPb RS- Pin C Pin SLEW Gate Pin V Pin OUTFB Power Dissipation Storage Temperature Operating Temperature Range Lead Temperature Range (Soldering 10 sec) Junction Temperature Rating 20V 20V ...
Page 4
... In figure 2, the ADM1203 is configured to control the ramp of the largest supply first. The output of the first device is connected to the slew pin on the second device to allow the rate of the first supply to control the rate of the second and so on ...
Page 5
... SLEW pin Figure 6. Tracking up Waveforms CURRENT LIMIT CIRCUIT BREAKER FUNCTION The ADM1203 features a current limiting circuit breaker. When there is a sudden load current surge, such as a low impedance fault, the bus supply voltage can drop significantly to a point where the power to an adjacent card is affected, causing system malfunctions ...
Page 6
... When the card is being inserted into the bus connector, the long pins mate first which brings up the supply VIN at time point 1 of Figure 7. The ADM1203 is in reset mode as the ON pin is low. GATE is pulled low and the TIMER pin is pulled low with a 100µA source. At time point 2, the short pin makes contact and ON is pulled high ...
Page 7
... Chip Ground Pin. Logic Pin. Drive high to initiate track up off all ADM1203 controlled rails. Drive low to initiate track down of all rails (ADM1203- fast shutdown of all rails (ADM1203-2). Monitors the Source of the external FET Connect to an external capacitor to control the slew rate of the of the GATE at turn on (and turn-off for ADM1203-1) ...
Page 8
... Variant ADM1203-1AUJ UP/DOWNb logic input ADM1203-2AUJ UP/STOPb logic input ADM1203-3AUJ UP/DOWNb logic input ADM1203-4AUJ UP/STOPb logic input 2005 003 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective companies. PR05140-0-2/05(PrD) Printed in the U.S.A. Preliminary Technical Data ...