Datasheet LT3752, LT3752-1 (Analog Devices) - 5

LT3752/LT3752-1
ELECTRICAL CHARACTERISTICS The
l
denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C. VIN = 12V, UVLO_VSEC = 2.5V. PARAMETER CONDITIONS MIN TYP MAX UNITS
OVLO Hysteresis l 23 35 47 mV OVLO Pin Current (Note 10) OVLO = 0V 5 100 nA OVLO = 1.5V (SS1 = 2.7V) 0.9 mA OVLO = 1.5V (SS1 = 1.0V) 5 100 nA
Oscillator (Forward Controller: OUT, SOUT, AOUT)
Frequency: fOSC = 100kHz RT = 82.5k 94 100 106 kHz Frequency: fOSC = 300kHz RT = 24.9k l 279 300 321 kHz Frequency: fOSC = 500kHz RT = 14k 470 500 530 kHz fOSC Line Regulation RT = 24.9k 6.5V < VIN < 100V (LT3752) 0.05 0.1 %/V 10.5V < VIN < 16V (LT3752-1) 0.05 0.1 %/V Frequency and DVSEC Foldback Ratio (LT3752) (Fold) SS1 = VSSACT + 25mV, SS2 = 2.7V 4 Frequency and DVSEC Foldback Ratio (LT3752-1) (Fold) SS1 = VSS1ACT + 25mV, SS2 = 2.7V 2 SYNC Input High Threshold (Note 4) l 1.2 1.8 V SYNC Input Low Threshold (Note 4) l 0.6 1.025 V SYNC Pin Current SYNC = 6V 75 µA SYNC Frequency/Programmed fOSC 1.0 1.25 kHz/kHz
Linear Regulator (INTVCC) (LT3752)
INTVCC Regulation Voltage 6.6 7 7.2 V Dropout (VIN-INTVCC) VIN = 6.5V, IINTVCC = 10mA 0.8 V INTVCC UVLO(+) (Start Switching) 4.75 5 V INTVCC UVLO(–) (Stop Switching) 4.6 4.85 V INTVCC UVLO Hysteresis 0.075 0.15 0.24 V
Linear Regulator (INTVCC) (LT3752-1)
INTVCC Regulation Voltage 9.4 10 10.4 V Dropout (VIN-INTVCC) VIN = 8.75V, IINTVCC = 10mA 0.6 V INTVCC UVLO(+) (Start Switching) 7 7.4 V INTVCC UVLO(–) (Stop Switching) 6.8 7.2 V INTVCC UVLO Hysteresis 0.1 0.2 0.3 V
Linear Regulator (INTVCC) (LT3752/LT3752-1)
INTVCC OVLO(+) (Stop Switching) 15.9 16.5 17.2 V INTVCC OVLO(–) (Start Switching) 15.4 16 16.7 V INTVCC OVLO Hysteresis 0.38 0.5 0.67 V INTVCC Current Limit INTVCC = 0V 17 23 29 mA INTVCC = 5.75V (LT3752) l 35 50 60 mA INTVCC = 8.75V (LT3752-1) l 35 50 60 mA
Error Amplifier
FB Reference Voltage l 1.220 1.250 1.275 V FB Line Reg 6.5V < VIN < 100V (LT3752) 0.1 0.3 mV/V 10.5V < VIN < 16V (LT3752-1) 0.1 0.3 mV/V FB Load Reg COMP_SW – 0.1V < COMP < COMP_VOH – 0.1V 0.1 0.3 mV/V FB Input Bias Current (Note 10) 50 200 nA Open-Loop Voltage Gain 85 dB Unity-Gain Bandwidth (Note 8) 2.5 MHz COMP Source Current FB = 1V, COMP = 1.75V (Note 10) 6 11 mA Rev. C For more information www.analog.com 5 Document Outline Features Applications Typical Application Description Table of Contents Absolute Maximum Ratings Order Information Pin Configuration Order Information Electrical Characteristics Pin Functions Block Diagram Timing Diagrams Operation Applications Information Typical Applications Package Description Revision History Typical Application Related Parts