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LTM4607 Datasheet(PDF) 4 Page - Linear Technology |
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LTM4607 Datasheet(HTML) 4 Page - Linear Technology |
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4 / 24 page  LTM4607 4 4607f Note 1: Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. Exposure to any Absolute Maximum Rating condition for extended periods may affect device reliability and lifetime. Note 2: The LTM4607E is guaranteed to meet performance specifications from 0°C to 85°C. Specifications over the –40°C to 85°C operating temperature range are assured by design, characterization and correlation with statistical process controls. The LTM4607I is guaranteed over the –40°C to 85°C temperature range. Note 3: The LTM4607 is tested in a feedback loop that servos VCOMP to a specified voltage and measures the resultant VFB. Note 4: Turn-on and turn-off time are measured using 10% and 90% levels. Transition delay time is measured using 50% levels. Note 5: 100% test at wafer level only. SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS Control Section VFB Feedback Reference Voltage VCOMP = 1.2V ● 0.792 0.8 0.808 V VRUN RUN Pin ON/OFF Threshold 1 1.6 2.2 V ISS Soft-Start Charging Current VRUN = 2.2V 1 1.7 μA VSTBYMD(START) Start-Up Threshold VSTBYMD Rising 0.4 0.7 V VSTBYMD(KA) Keep-Active Power On Threshold VSTBYMD Rising, VRUN = 0V 1.25 V VFCB Forced Continuous Threshold 0.76 0.8 0.84 V IFCB Forced Continuous Pin Current VFCB = 0.85V –0.3 –0.2 –0.1 μA VBURST Burst Inhibit (Constant Frequency) Threshold Measured at FCB Pin 5.3 5.5 V DF(BOOST, MAX) Maximum Duty Factor % Switch M4 On 99 % DF(BUCK, MAX) Maximum Duty Factor % Switch M1 On 99 % tON(MIN, BUCK) Minimum On-Time for Synchronous Switch in Buck Operation Switch M1 (Note 5) 200 250 ns RFBHI Resistor Between VOUT and VFB Pins 99.5 100 100.5 kΩ Internal VCC Regulator INTVCC Internal VCC Voltage VIN > 7V, VEXTVCC = 5V ● 5.7 6 6.3 V ΔVLDO/VLDO Internal VCC Load Regulation ICC = 0mA to 20mA, VEXTVCC = 5V 0.3 2 % VEXTVCC EXTVCC Switchover Voltage ICC = 20mA, VEXTVCC Rising ● 5.4 5.6 V ΔVEXTVCC(HYS) EXTVCC Switchover Hysteresis 300 mV ΔVEXTVCC EXTVCC Switch Drop Voltage ICC = 20mA, VEXTVCC = 6V 60 150 mV Current Sensing Section VSENSE(MAX) Maximum Current Sense Threshold Boost Mode Buck Mode ● ● –95 160 –130 190 –150 mV mV VSENSE(MIN, BUCK) Minimum Current Sense Threshold Discontinuous Mode –6 mV ISENSE Sense Pins Total Source Current VSENSE– = VSENSE+ = 0V –380 μA PGOOD ΔVFBH PGOOD Upper Threshold VFB Rising 5.5 7.5 10 % ΔVFBL PGOOD Lower Threshold VFB Falling –5.5 –7.5 –10 % ΔVFB(HYS) PGOOD Hysteresis VFB Returning 2.5 % VPGL PGOOD Low Voltage IPGOOD = 2mA 0.2 0.3 V IPGOOD PGOOD Leakage Current VPGOOD = 5V 1 μA ELECTRICAL CHARACTERISTICS The ● denotes the specifications which apply over the –40°C to 85°C temperature range, otherwise specifications are at TA = 25°C, VIN = 12V. Per typical application (front page) configuration. |
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Similar Description - LTM4607 |
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