LTM4639 ELECTRICAL CHARACTERISTICS The l denotes the specifications which apply over the specified internaloperating temperature range (Note 2), otherwise specifications are at TA = 25°C. VIN = 3.3V, CPWR = 5V, per the typical application inFigure 22.SYMBOLPARAMETERCONDITIONSMINTYPMAXUNITS AV Differential Gain (Note 7) 1 V/V SR Slew Rate (Note 6) 2 V/µs GBP Gain Bandwidth Product (Note 6) 3 MHz CMRR Common Mode Rejection (Note 7) 60 dB IDIFF_OUT DIFF_OUT Current Sourcing 2 mA PSRR Power Supply Rejection 5V < VIN < 7V (Note 7) 100 dB Ratio CPWR Tracking VIN RIN Input Resistance VOSNS+ to GND 80 kΩ PGOOD Output VPGOOD PGOOD Trip Level VFB With Respect to Set Output VFB Ramping Negative –10 % VFB Ramping Positive 10 % VPGL PGOOD Voltage Low IPGOOD = 2mA 0.1 0.3 V INTVCC Linear Regulator VINTVCC Source Output 5V < VIN < 7V, CPWR Tracking VIN 4.8 5 5.2 V VLDOINT INTVCC Load Regulation ICC = 0 to 40mA, CPWR = 5.5V 2 % VEXTVCC External VCC Switchover EXTVCC Ramping Positive, CPWR = 5.5V, INTVCC Output 5V l 4.5 4.7 V VLDOEXT EXTVCC Voltage Drop ICC = 25mA, VEXTVCC = 5V, CPWR = 5.5V 75 220 mV Oscillator and Phase-Locked Loop fSYNC Frequency Sync Capture MODE_PLLIN Clock Duty Cycle = 50% 250 800 kHz Range fNOM Nominal Frequency VfSET = 1.2V 450 500 550 kHz fLOW Lowest Frequency VfSET = 0V 210 250 290 kHz fHIGH Highest Frequency VfSET ≥ 2.4V 700 770 850 kHz IFREQ Frequency Set Current 9 10 11 µA RMODE_PLLIN MODE_PLLIN Input 250 kΩ Resistance VIH_MODE_PLLIN Clock Input Level High 2.0 V VIL_MODE_PLLIN Clock Input Level Low 0.8 V Temperature Diode VTEMP TEMP Diode Voltage ITEMP = 100µA 0.6 V TC VTEMP Temperature Coefficient l –2 mV/°C Note 1: Stresses beyond those listed under Absolute Maximum Ratings determined by specific operating conditions in conjunction with board may cause permanent damage to the device. Exposure to any Absolute layout, the rated package thermal resistance and other environmental Maximum Rating condition for extended periods may affect device factors. reliability and lifetime. Note 3: The minimum on-time condition is specified for a peak-to-peak Note 2: The LTM4639 is tested under pulsed load conditions such that inductor ripple current of ~40% of IMAX Load. (See the Applications TJ ≈ TA. The LTM4639E is guaranteed to meet performance specifications Information section) over the 0°C to 125°C internal operating temperature range. Specifications Note 4: See output current derating curves for different VIN, VOUT and TA. over the full –40°C to 125°C internal operating temperature range are Note 5: Limit current into the RUN pin to less than 2mA. assured by design, characterization and correlation with statistical process Note 6: Guaranteed by design. controls. The LTM4639I is guaranteed to meet specifications over the full –40°C to 125°C internal operating temperature range. Note that the Note 7: 100% tested at wafer level. maximum ambient temperature consistent with these specifications is 4639f 4 For more information www.linear.com/LTM4639
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