Datasheet LTC3407A (Analog Devices) - 3
| Manufacturer | Analog Devices |
| Description | Dual Synchronous 600mA, 1.5MHz Step-Down DC/DC Regulator |
| Pages / Page | 16 / 3 — ELECTRICAL CHARACTERISTICS The. denotes the specifi cations which apply … |
| File Format / Size | PDF / 296 Kb |
| Document Language | English |
ELECTRICAL CHARACTERISTICS The. denotes the specifi cations which apply over the full operating
Model Line for this Datasheet
Text Version of Document
LTC3407A
ELECTRICAL CHARACTERISTICS The
l
denotes the specifi cations which apply over the full operating temperature range, otherwise specifi cations are at TA = 25°C. VIN = 3.6V, unless otherwise specifi ed. (Note 2) SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
ΔVLOAD REG Output Voltage Load Regulation MODE/SYNC = 0V (Note 3) 0.5 % IS Input DC Supply Current (Note 4) Active Mode VFB1 = VFB2 = 0.5V 600 800 μA Sleep Mode VFB1 = VFB2 = 0.63V, MODE/SYNC = 3.6V 40 60 μA Shutdown RUN = 0V, VIN = 5.5V, MODE/SYNC = 0V 0.1 1 μA fOSC Oscillator Frequency VFBX = 0.6V ● 1.2 1.5 1.8 MHz fSYNC Synchronization Frequency 1.5 MHz ILIM Peak Switch Current Limit VIN = 3V, VFBX = 0.5V, Duty Cycle <35% 0.75 1 1.25 A RDS(ON) Top Switch On-Resistance (Note 6) 0.35 0.45 Ω Bottom Switch On-Resistance (Note 6) 0.30 0.45 Ω ISW(LKG) Switch Leakage Current VIN = 5V, VRUN = 0V, VFBX = 0V 0.01 1 μA POR Power-On Reset Threshold VFBX Ramping Up, MODE/SYNC = 0V 8.5 % VFBX Ramping Down, MODE/SYNC = 0V –8.5 % Power-On Reset On-Resistance 100 200 Ω Power-On Reset Delay 65,536 Cycles VRUN RUN/SS Threshold Low ● 0.3 1 1.5 V RUN/SS Threshold High ● 2 V IRUN RUN/SS Leakage Current ● 0.01 1 μA VMODE MODE Threshold Low 0 0.5 V MODE Threshold High VIN – 0.5 VIN V
Note 1:
Stresses beyond those listed under Absolute Maximum Ratings
Note 3:
The LTC3407A is tested in a proprietary test mode that connects may cause permanent damage to the device. Exposure to any Absolute VFB to the output of the error amplifi er. Maximum Rating condition for extended periods may affect device
Note 4:
Dynamic supply current is higher due to the internal gate charge reliability and lifetime. being delivered at the switching frequency.
Note 2:
The LTC3407AE is guaranteed to meet specifi ed performance
Note 5:
TJ is calculated from the ambient TA and power dissipation PD from 0°C to 85°C. Specifi cations over the –40°C and 85°C operating according to the following formula: T temperature range are assured by design, characterization and correlation J = TA + (PD • θJA). with statistical process controls. The LTC3407AI is guaranteed over the full
Note 6:
The DFN switch on-resistance is guaranteed by correlation to –40°C to 125°C temperature range. wafer level measurements.
TYPICAL PERFORMANCE CHARACTERISTICS Burst Mode Operation Pulse Skipping Mode
SW SW 5V/DIV 5V/DIV VOUT VOUT 50mV/DIV 10mV/DIV IL IL 200mA/DIV 100mA/DIV 3407 G01 2μs/DIV 3407 G02 1μs/DIV VIN = 3.6V VIN = 3.6V VOUT = 1.8V VOUT = 1.8V ILOAD = 50mA ILOAD = 50mA CIRCUIT OF FIGURE 3 CIRCUIT OF FIGURE 3 3407afa 3
ELECTRICAL CHARACTERISTICS The
l
denotes the specifi cations which apply over the full operating temperature range, otherwise specifi cations are at TA = 25°C. VIN = 3.6V, unless otherwise specifi ed. (Note 2) SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
ΔVLOAD REG Output Voltage Load Regulation MODE/SYNC = 0V (Note 3) 0.5 % IS Input DC Supply Current (Note 4) Active Mode VFB1 = VFB2 = 0.5V 600 800 μA Sleep Mode VFB1 = VFB2 = 0.63V, MODE/SYNC = 3.6V 40 60 μA Shutdown RUN = 0V, VIN = 5.5V, MODE/SYNC = 0V 0.1 1 μA fOSC Oscillator Frequency VFBX = 0.6V ● 1.2 1.5 1.8 MHz fSYNC Synchronization Frequency 1.5 MHz ILIM Peak Switch Current Limit VIN = 3V, VFBX = 0.5V, Duty Cycle <35% 0.75 1 1.25 A RDS(ON) Top Switch On-Resistance (Note 6) 0.35 0.45 Ω Bottom Switch On-Resistance (Note 6) 0.30 0.45 Ω ISW(LKG) Switch Leakage Current VIN = 5V, VRUN = 0V, VFBX = 0V 0.01 1 μA POR Power-On Reset Threshold VFBX Ramping Up, MODE/SYNC = 0V 8.5 % VFBX Ramping Down, MODE/SYNC = 0V –8.5 % Power-On Reset On-Resistance 100 200 Ω Power-On Reset Delay 65,536 Cycles VRUN RUN/SS Threshold Low ● 0.3 1 1.5 V RUN/SS Threshold High ● 2 V IRUN RUN/SS Leakage Current ● 0.01 1 μA VMODE MODE Threshold Low 0 0.5 V MODE Threshold High VIN – 0.5 VIN V
Note 1:
Stresses beyond those listed under Absolute Maximum Ratings
Note 3:
The LTC3407A is tested in a proprietary test mode that connects may cause permanent damage to the device. Exposure to any Absolute VFB to the output of the error amplifi er. Maximum Rating condition for extended periods may affect device
Note 4:
Dynamic supply current is higher due to the internal gate charge reliability and lifetime. being delivered at the switching frequency.
Note 2:
The LTC3407AE is guaranteed to meet specifi ed performance
Note 5:
TJ is calculated from the ambient TA and power dissipation PD from 0°C to 85°C. Specifi cations over the –40°C and 85°C operating according to the following formula: T temperature range are assured by design, characterization and correlation J = TA + (PD • θJA). with statistical process controls. The LTC3407AI is guaranteed over the full
Note 6:
The DFN switch on-resistance is guaranteed by correlation to –40°C to 125°C temperature range. wafer level measurements.
TYPICAL PERFORMANCE CHARACTERISTICS Burst Mode Operation Pulse Skipping Mode
SW SW 5V/DIV 5V/DIV VOUT VOUT 50mV/DIV 10mV/DIV IL IL 200mA/DIV 100mA/DIV 3407 G01 2μs/DIV 3407 G02 1μs/DIV VIN = 3.6V VIN = 3.6V VOUT = 1.8V VOUT = 1.8V ILOAD = 50mA ILOAD = 50mA CIRCUIT OF FIGURE 3 CIRCUIT OF FIGURE 3 3407afa 3
