Datasheet LTM4657 (Analog Devices) - 8

LTM4657
BLOCK DIAGRAM
PGOOD 10k INTVCC INTVCC V 1µF IN VIN 3.1V TO 20V 0.1µF CIN MODE/CLKIN 10µF 25V 20k 0.38µH VOUT VOUT CLKOUT 1V 8A COUT POWER CONTROL 1µF PHMODE 47µF GND 6.3V TRACK/SS – 0.1µF VOSNS RFB RUN 60.4k FB COMPa 60.4k + COMPb VOSNS INTERNAL INTERNAL FILTER COMP 332k FREQ GND 4657 BD
Figure 1. Simplified LTM4657 Block Diagram DECOUPLING REQUIREMENTS SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
CIN External Input Capacitor Requirement IOUT = 8A 10 22 µF (VIN = 3.1V to 20V, VOUT = 1.0V) COUT External Output Capacitor Requirement IOUT = 8A 150* 330* µF (VIN = 3.1V to 20V, VOUT = 1.0V) *Additional capacitance may be required under extreme temperature and/or capacitor bias voltage conditions due to variation of actual capacitance over bias voltage and temperature. Rev 0 8 For more information www.analog.com Document Outline Features Applications Typical Application Description Absolute Maximum Ratings Order Information Electrical Characteristics Pin Configuration Typical Performance Characteristics Pin Functions Block Diagram Decoupling Requirements Operation Applications Information Package Description Package Photo Design Resources Related Parts