Datasheet LTC3727LX-1 (Analog Devices) - 4

HerstellerAnalog Devices
BeschreibungHigh Efficiency, 2-Phase Synchronous Step-Down Switching Regulator
Seiten / Seite28 / 4 — ELECTRICAL CHARACTERISTICS The. denotes the specifications which apply …
Dateiformat / GrößePDF / 431 Kb
DokumentenspracheEnglisch

ELECTRICAL CHARACTERISTICS The. denotes the specifications which apply over the full operating

ELECTRICAL CHARACTERISTICS The denotes the specifications which apply over the full operating

Modelllinie für dieses Datenblatt

Textversion des Dokuments

LTC3727LX-1
ELECTRICAL CHARACTERISTICS The

denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25
°
C. VIN = 15V, VRUN/SS1, 2 = 5V unless otherwise noted. SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS 3.3V Linear Regulator
V3.3OUT 3.3V Regulator Output Voltage No Load ● 3.25 3.35 3.45 V V3.3IL 3.3V Regulator Load Regulation I3.3 = 0mA to 10mA 0.5 2.5 % V3.3VL 3.3V Regulator Line Regulation 6V < VIN < 30V 0.05 0.3 %
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 4:
The LTC3727LX-1 is tested in a feedback loop that servos VITH1, 2 may cause permanent damage to the device. Exposure to any Absolute to a specified voltage and measures the resultant VOSENSE1, 2. Maximum Rating condition for extended periods may affect device
Note 5:
Dynamic supply current is higher due to the gate charge being reliability and lifetime. delivered at the switching frequency. See Applications Information.
Note 2:
The LTC3727LX-1 is guaranteed to meet performance
Note 6:
Rise and fall times are measured using 10% and 90% levels. Delay specifications from 0°C to 85°C. Specifications over the –40°C to 85°C times are measured using 50% levels. operating temperature range are assured by design, characterization and correlation with statistical process controls.
Note 3:
TJ is calculated from the ambient temperature TA and power dissipation PD according to the following formulas: LTC3727LXEG-1: TJ = TA + (PD • 95 °C/W) LTC3727LXEUH-1: TJ = TA + (PD • 34 °C/W)
W U TYPICAL PERFOR A CE CHARACTERISTICS Efficiency vs Output Current Efficiency vs Output Current Efficiency vs Input Voltage and Mode (Figure 13) (Figure 13) (Figure 13)
100 100 100 Burst Mode V VOUT = 5V 90 IN = 7V OPERATION IOUT = 3A 80 FORCED 90 90 CONTINUOUS 70 MODE VIN = 10V VIN = 15V 60 80 80 50 VIN = 20V CONSTANT- 40 70 70 EFFICIENCY (%) FREQUENCY EFFICIENCY (%) EFFICIENCY (%) 30 (BURST DISABLE) 20 60 60 10 VIN = 15V VOUT = 8.5V VOUT = 5V 0 50 50 0.001 0.01 0.1 1 10 0.001 0.01 0.1 1 10 5 15 25 32 OUTPUT CURRENT (A) OUTPUT CURRENT (A) INPUT VOLTAGE (V) 3727LX1 G01 3727LX1 G02 3727LX1 G03 3727lx1fa 4