cs5231-3 ON Semiconductor, cs5231-3 Datasheet
cs5231-3
Available stocks
Related parts for cs5231-3
cs5231-3 Summary of contents
Page 1
... V OUT input voltage is lower than the output voltage. The CS5231−3 can be used to provide power to an ASIC on a PCI Network Interface Card (NIC). When the system enters a Sleep State and the 5.0 V input drops below 4.4 V, the AuxDrv control signal on the CS5231−3 is activated turning on the external PFET. This switches the supply source from the 5.0 V input to the 3.3 V input through the PFET, guaranteeing a constant 3.3 V output to the ASIC that is “ ...
Page 2
AuxDrv Comparator GND ABSOLUTE MAXIMUM RATINGS* Maximum Operating Junction Temperature Storage Temperature Range Lead Temperature Soldering: ESD Damage Threshold (Human Body Model second maximum above 183°C. *The maximum package power dissipation must ...
Page 3
ELECTRICAL CHARACTERISTICS ESR < 1 mA; unless otherwise specified.) OUT Characteristic Linear Regulator Output Voltage 10 mA < I Line Regulation I OUT Load Regulation V Ground Current I OUT I OUT Reverse Current V Current ...
Page 4
TYPICAL PERFORMANCE CHARACTERISTICS OUT 3.302 3.300 I = 500 mA OUT 3.298 3.296 Junction Temperature (°C) Figure 2. Output Voltage vs. Junction Temperature 1.2 125°C 1.0 0.8 0.6 0.4 27°C 0.2 ...
Page 5
... Stable Region 27°C 100 10 0.4 0 1.0 Figure 9. Region of Stable Operation 3.4 3.3 3.2 500 10 100 120 140 Figure 11. Transient Response OUT CS5231−3 GND AuxDrv indicates PFET body diode Figure 12. Application Circuit http://onsemi.com 5 = 25°C 2.0 3.0 4.0 5.0 6.0 Capacitance ESR ( ...
Page 6
... THEORY OF OPERATION The CS5231− fixed 3.3 V linear regulator that contains an auxiliary drive control feature. When V greater than the typical 4.5 V threshold, the IC functions as a linear regulator. It provides up to 500 mA of current to a load through a composite PNP−NPN pass transistor. An output capacitor greater than 10 mF with equivalent series resistance less than 1 ...
Page 7
OUT V AUXDRV I = 375 3.135 V OUT AUX Figure 16. Power−Up 3.135 V. The AUX “Oscillatory Performance” Mode Lasts Longer Because the Difference Between V Greater OUT ...
Page 8
... R due to temperature. DS(ON not possible to remotely sense the output voltage of the CS5231−3 since the feedback path to the error amplifier is not externally available important to minimize results voltage drops due to metal resistance of high current PC OUT board traces ...
Page 9
... Maximum ambient temperature and power dissipation are determined by the design, while q JA package manufacturer. The maximum junction temperature for operation of the CS5231−3 within specification is 150°C. The maximum power dissipation of a linear regulator is given as P D(MAX IN(MAX OUT(MIN LOAD(MAX IN(MAX) ) ...
Page 10
... The extra turret pin provides for connection of multiple instrument grounds to the demonstration board. The AuxDrv Connection The AuxDrv lead of the CS5231−3 is connected to the gate of the external PFET. This connection is also brought to a turret pin to allow easy connection of an oscilloscope probe for viewing the AuxDrv waveforms ...
Page 11
... Turret pins Á Á Á Á Á Á Á Á Á Á Á Á Á Á Á Á Á Á Temperature Performance The graph below shows thermal performance for the CS5231−3 across the normal operating output current range ...
Page 12
PACKAGE DIMENSIONS CASE 936AC−01 2 For D PAK Outline and Dimensions − Contact Factory http://onsemi.com 2 D PAK−5 DP SUFFIX ISSUE O 12 ...
Page 13
0.25 (0.010 −Y− SEATING PLANE −Z− 0.25 (0.010 PACKAGE THERMAL DATA Parameter R qJC R qJA *Depending on thermal properties of substrate. R ...
Page 14
... Japan: ON Semiconductor, Japan Customer Focus Center 2−9−1 Kamimeguro, Meguro−ku, Tokyo, Japan 153−0051 Phone: 81−3−5773−3850 http://onsemi.com 14 ON Semiconductor Website: http://onsemi.com Order Literature: http://www.onsemi.com/litorder For additional information, please contact your local Sales Representative. CS5231−3/D ...