LTM4649 ELECTRICAL CHARACTERISTICSThe l denotes the specifications which apply over the specified internaloperating temperature range, otherwise specifications are at TA = 25°C (Note 2). VIN = 12V per typical application.SYMBOLPARAMETERCONDITIONSMINTYPMAXUNITS SR Slew Rate (Note 5) 2 V/µs GBP Gain Bandwidth Product (Note 5) 3 MHz CMRR Common Mode Rejection (Note 3) 60 dB IDIFFOUT DIFFOUT Current Sourcing 2 mA RIN Input Resistance DIFFP, DIFFN to GND 80 kΩ 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 Internal VCC Voltage 4.8 5 5.2 V VINTVCC Load Reg INTVCC Load Regulation ICC = 0mA to 50mA 0.9 % Oscillator and Phase-Locked Loop fSYNC Frequency Sync Capture Range 250 800 kHz fS Nominal Switching Frequency 400 450 500 kHz RMODE MODE Input Resistance 250 kΩ VIH_CLKIN Clock Input Level High 2.0 V VIL_CLKIN Clock Input Level Low 0.8 V Note 1: Stresses beyond those listed under Absolute Maximum Ratings Note 3: 100% tested at wafer level. may cause permanent damage to the device. Exposure to any Absolute Note 4: See output current derating curves for different VIN, VOUT and TA. Maximum Rating condition for extended periods may affect device Note 5: Guaranteed by design. reliability and lifetime. Notes are automatically numbered when you apply the note style. Note 2: The LTM4649 is tested under pulsed load conditions such that TJ ≈ TA. The LTM4649E is guaranteed to meet performance specifications over the 0°C to 125°C internal operating temperature range. Specifications over the –40°C to 125°C internal operating temperature range are assured by design, characterization and correlation with statistical process controls. The LTM4649I is guaranteed to meet specifications over the –40°C to 125°C internal operating temperature range. Note that the maximum ambient temperature consistent with these specifications is determined by specific operating conditions in conjunction with board layout, the rated package thermal resistance and other environmental factors. 4649fc 4 For more information www.linear.com/LTM4649 Document Outline Features Applications Description Typical Application Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Operation Applications Information Typical Applications Package Description Package Photo Revision History Typical Application Design Resources Related Parts
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