Datasheet LTC3729L-6 (Analog Devices) - 4
| Manufacturer | Analog Devices |
| Description | PolyPhase, Synchronous Step-Down Switching Regulator |
| Pages / Page | 28 / 4 — ELECTRICAL CHARACTERISTICS The. denotes the specifications which apply … |
| File Format / Size | PDF / 356 Kb |
| Document Language | English |
ELECTRICAL CHARACTERISTICS The. denotes the specifications which apply over the full operating
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LTC3729L-6
ELECTRICAL CHARACTERISTICS The
●
denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25
°
C. VIN = 15V, VRUN/SS = 5V unless otherwise noted. SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
RRELPHS Controller 2-Controller 1 Phase VPHASMD = 0V, Open 180 Deg VPHASMD = 5V 240 Deg CLKOUT Phase (Relative to Controller 1) VPHASMD = 0V 60 Deg VPHASMD = Open 90 Deg VPHASMD = 5V 120 Deg CLKHIGH Clock High Output Voltage 4 V CLKLOW Clock Low Output Voltage 0.2 V
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 VEAIN with Respect to Set Output Voltage VEAIN Ramping Negative – 8 – 10 – 12 % VEAIN Ramping Positive 8 10 12 % tMASK PGOOD Mask Timer 100 µs
Differential Amplifier Gain Block (Note 5)
ADA Gain 0.995 1 1.005 V/V CMRRDA Common Mode Rejection Ratio 0V < VCM < 5V 46 55 dB RIN Input Resistance Measured at VOS+ Input 80 kΩ
Note 1:
Absolute Maximum Ratings are those values beyond which the life
Note 4:
Dynamic supply current is higher due to the gate charge being of a device may be impaired. delivered at the switching frequency. See Applications Information.
Note 2:
T
Note 5:
The minimum on-time condition corresponds to the on inductor J is calculated from the ambient temperature TA and power dissipation P peak-to-peak ripple current D according to the following formulas: ≥40% of IMAX (see Minimum On-Time Considerations in the Applications Information section). TJ = TA + (PD • 34°C/W)
Note 6:
The LTC3729LEUH-6 is guaranteed to meet performance
Note 3:
The I.C. is tested in a feedback loop that servos VITH to a specified specifications from 0 voltage and measures the resultant V °C to 70°C. Specifications over the –40°C to 85°C EAIN. operating ambient temperature range are assured by design, characterization and correlation with statistical process controls.
W U TYPICAL PERFOR A CE CHARACTERISTICS Efficiency vs Output Current Efficiency vs Output Current Efficiency vs Input Voltage (Figure 12) (Figure 12) (Figure 12)
100 100 100 VOUT = 3.3V V VEXTVCC = 5V EXTVCC = 5V 80 I 90 OUT = 20A V T IN = 5V A = 25°C VIN = 8V VEXTVCC = 0V 90 60 VIN = 12V 80 VIN = 20V 40 70 EFFICIENCY (%) EFFICIENCY (%) EFFICIENCY (%) 80 V 20 OUT = 3.3V V 60 EXTVCC = 5V IOUT = 20A VOUT = 3.3V TA = 25°C TA = 25°C 0 50 70 0.1 1 10 100 1 10 100 5 10 15 20 OUTPUT CURRENT (A) OUTPUT CURRENT (A) VIN (V) 3729L-6 G01 3729L-6 G02 3729L-6 G03 sn3729l6 3729l6fs 4
ELECTRICAL CHARACTERISTICS The
●
denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25
°
C. VIN = 15V, VRUN/SS = 5V unless otherwise noted. SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
RRELPHS Controller 2-Controller 1 Phase VPHASMD = 0V, Open 180 Deg VPHASMD = 5V 240 Deg CLKOUT Phase (Relative to Controller 1) VPHASMD = 0V 60 Deg VPHASMD = Open 90 Deg VPHASMD = 5V 120 Deg CLKHIGH Clock High Output Voltage 4 V CLKLOW Clock Low Output Voltage 0.2 V
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 VEAIN with Respect to Set Output Voltage VEAIN Ramping Negative – 8 – 10 – 12 % VEAIN Ramping Positive 8 10 12 % tMASK PGOOD Mask Timer 100 µs
Differential Amplifier Gain Block (Note 5)
ADA Gain 0.995 1 1.005 V/V CMRRDA Common Mode Rejection Ratio 0V < VCM < 5V 46 55 dB RIN Input Resistance Measured at VOS+ Input 80 kΩ
Note 1:
Absolute Maximum Ratings are those values beyond which the life
Note 4:
Dynamic supply current is higher due to the gate charge being of a device may be impaired. delivered at the switching frequency. See Applications Information.
Note 2:
T
Note 5:
The minimum on-time condition corresponds to the on inductor J is calculated from the ambient temperature TA and power dissipation P peak-to-peak ripple current D according to the following formulas: ≥40% of IMAX (see Minimum On-Time Considerations in the Applications Information section). TJ = TA + (PD • 34°C/W)
Note 6:
The LTC3729LEUH-6 is guaranteed to meet performance
Note 3:
The I.C. is tested in a feedback loop that servos VITH to a specified specifications from 0 voltage and measures the resultant V °C to 70°C. Specifications over the –40°C to 85°C EAIN. operating ambient temperature range are assured by design, characterization and correlation with statistical process controls.
W U TYPICAL PERFOR A CE CHARACTERISTICS Efficiency vs Output Current Efficiency vs Output Current Efficiency vs Input Voltage (Figure 12) (Figure 12) (Figure 12)
100 100 100 VOUT = 3.3V V VEXTVCC = 5V EXTVCC = 5V 80 I 90 OUT = 20A V T IN = 5V A = 25°C VIN = 8V VEXTVCC = 0V 90 60 VIN = 12V 80 VIN = 20V 40 70 EFFICIENCY (%) EFFICIENCY (%) EFFICIENCY (%) 80 V 20 OUT = 3.3V V 60 EXTVCC = 5V IOUT = 20A VOUT = 3.3V TA = 25°C TA = 25°C 0 50 70 0.1 1 10 100 1 10 100 5 10 15 20 OUTPUT CURRENT (A) OUTPUT CURRENT (A) VIN (V) 3729L-6 G01 3729L-6 G02 3729L-6 G03 sn3729l6 3729l6fs 4
