Datasheet LTC3728L-1 (Analog Devices) - 4
| Manufacturer | Analog Devices |
| Description | Dual, 550kHz, 2-Phase Synchronous Regulator |
| Pages / Page | 32 / 4 — ELECTRICAL CHARACTERISTICS. The. denotes the specifi cations which apply … |
| File Format / Size | PDF / 487 Kb |
| Document Language | English |
ELECTRICAL CHARACTERISTICS. The. denotes the specifi cations which apply over the full operating
Model Line for this Datasheet
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LTC3728L-1
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 = 15V, VRUN/SS1, 2 = 5V unless otherwise noted. SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
IPLLFLTR Phase Detector Output Current Sinking Capability fPLLIN < fOSC –15 μA Sourcing Capability fPLLIN > fOSC 15 μA
3.3V Linear Regulator
V3.3OUT 3.3V Regulator Output Voltage No Load ● 3.2 3.35 3.45 V V3.3IL 3.3V Regulator Load Regulation I3.3 = 0 to 10mA 0.5 2 % V3.3VL 3.3V Regulator Line Regulation 6V < VIN < 30V 0.05 0.2 % I3.3LEAK Leakage Current in Shutdown VRUN/SS1 = 0V; VRUN/SS2 = 0V, VIN = 3V ● 10 50 μA
PGOOD Output
VPGL PGOOD Voltage Low IPGOOD = 2mA 0.1 0.3 V IPGOOD PGOOD Leakage Current VPGOOD = 5V ±1 μA VPG PGOOD Trip Level, Either Controller VOSENSE with Respect to Set Output Voltage VOSENSE Ramping Negative – 6 –7.5 – 9.5 % VOSENSE Ramping Positive 6 7.5 9.5 %
Note 1:
Stresses beyond those listed under Absolute Maximum Ratings
Note 5:
Rise and fall times are measured using 10% and 90% levels. Delay may cause permanent damage to the device. Exposure to any Absolute times are measured using 50% levels. Maximum Rating condition for extended periods may affect device
Note 6:
The minimum on-time condition is specifi ed for an inductor reliability and lifetime. peak-to-peak ripple current ≥ 40% of IMAX (see minimum on-time
Note 2:
TJ is calculated from the ambient temperature TA and power considerations in the Applications Information section). dissipation PD according to the following formulas:
Note 7:
The LTC3728LE-1 are guaranteed to meet performance LTC3728LUH-1: TJ = TA + (PD • 34°C/W) specifi cations from 0°C to 85°C. Specifi cations over the –40°C to 85°C LTC3728LGN-1: TJ = TA + (PD • 95°C/W) operating temperature range are assured by design, characterization
Note 3:
The IC is tested in a feedback loop that servos VITH1, 2 to a and correlation with statistical process controls. The LTC3728LI-1 is specifi ed voltage and measures the resultant VOSENSE1, 2. guaranteed to meet performance specifi cations over the full –40°C to 85°C
Note 4:
Dynamic supply current is higher due to the gate charge being operating temperature range delivered at the switching frequency. See Applications Information.
TYPICAL PERFORMANCCE CHARACTERISTICS Effi ciency vs Output Current Effi ciency vs Output Current Effi ciency vs Input Voltage and Mode (Figure 13) (Figure 13) (Figure 13)
100 100 100 Burst Mode V 90 IN = 7V OPERATION 80 90 90 70 VIN = 10V FORCED VIN = 15V 60 CONTINUOUS 80 80 MODE (PWM) 50 VIN = 20V 40 70 CONSTANT 70 EFFICIENCY (%) EFFICIENCY (%) EFFICIENCY (%) 30 FREQUENCY (BURST DISABLE) 20 60 60 VIN = 15V VOUT = 5V 10 V VOUT = 5V OUT = 5V IOUT = 3A f = 250kHz f = 250kHz f = 250kHz 0 50 50 0.001 0.01 0.1 1 10 0.001 0.01 0.1 1 10 5 15 25 35 OUTPUT CURRENT (A) OUTPUT CURRENT (A) INPUT VOLTAGE (V) 3728L1 G01 3728L1 G02 3728L1 G03 3728l1fc 4
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 = 15V, VRUN/SS1, 2 = 5V unless otherwise noted. SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
IPLLFLTR Phase Detector Output Current Sinking Capability fPLLIN < fOSC –15 μA Sourcing Capability fPLLIN > fOSC 15 μA
3.3V Linear Regulator
V3.3OUT 3.3V Regulator Output Voltage No Load ● 3.2 3.35 3.45 V V3.3IL 3.3V Regulator Load Regulation I3.3 = 0 to 10mA 0.5 2 % V3.3VL 3.3V Regulator Line Regulation 6V < VIN < 30V 0.05 0.2 % I3.3LEAK Leakage Current in Shutdown VRUN/SS1 = 0V; VRUN/SS2 = 0V, VIN = 3V ● 10 50 μA
PGOOD Output
VPGL PGOOD Voltage Low IPGOOD = 2mA 0.1 0.3 V IPGOOD PGOOD Leakage Current VPGOOD = 5V ±1 μA VPG PGOOD Trip Level, Either Controller VOSENSE with Respect to Set Output Voltage VOSENSE Ramping Negative – 6 –7.5 – 9.5 % VOSENSE Ramping Positive 6 7.5 9.5 %
Note 1:
Stresses beyond those listed under Absolute Maximum Ratings
Note 5:
Rise and fall times are measured using 10% and 90% levels. Delay may cause permanent damage to the device. Exposure to any Absolute times are measured using 50% levels. Maximum Rating condition for extended periods may affect device
Note 6:
The minimum on-time condition is specifi ed for an inductor reliability and lifetime. peak-to-peak ripple current ≥ 40% of IMAX (see minimum on-time
Note 2:
TJ is calculated from the ambient temperature TA and power considerations in the Applications Information section). dissipation PD according to the following formulas:
Note 7:
The LTC3728LE-1 are guaranteed to meet performance LTC3728LUH-1: TJ = TA + (PD • 34°C/W) specifi cations from 0°C to 85°C. Specifi cations over the –40°C to 85°C LTC3728LGN-1: TJ = TA + (PD • 95°C/W) operating temperature range are assured by design, characterization
Note 3:
The IC is tested in a feedback loop that servos VITH1, 2 to a and correlation with statistical process controls. The LTC3728LI-1 is specifi ed voltage and measures the resultant VOSENSE1, 2. guaranteed to meet performance specifi cations over the full –40°C to 85°C
Note 4:
Dynamic supply current is higher due to the gate charge being operating temperature range delivered at the switching frequency. See Applications Information.
TYPICAL PERFORMANCCE CHARACTERISTICS Effi ciency vs Output Current Effi ciency vs Output Current Effi ciency vs Input Voltage and Mode (Figure 13) (Figure 13) (Figure 13)
100 100 100 Burst Mode V 90 IN = 7V OPERATION 80 90 90 70 VIN = 10V FORCED VIN = 15V 60 CONTINUOUS 80 80 MODE (PWM) 50 VIN = 20V 40 70 CONSTANT 70 EFFICIENCY (%) EFFICIENCY (%) EFFICIENCY (%) 30 FREQUENCY (BURST DISABLE) 20 60 60 VIN = 15V VOUT = 5V 10 V VOUT = 5V OUT = 5V IOUT = 3A f = 250kHz f = 250kHz f = 250kHz 0 50 50 0.001 0.01 0.1 1 10 0.001 0.01 0.1 1 10 5 15 25 35 OUTPUT CURRENT (A) OUTPUT CURRENT (A) INPUT VOLTAGE (V) 3728L1 G01 3728L1 G02 3728L1 G03 3728l1fc 4
