Datasheet LTC3766 (Analog Devices) - 3

LTC3766
ORDER INFORMATION http://www.linear.com/product/LTC3766#orderinfo LEAD FREE FINISH TAPE AND REEL PART MARKING* PACKAGE DESCRIPTION TEMPERATURE RANGE
LTC3766EGN#PBF LTC3766EGN#TRPBF LTC3766GN 28-Lead Narrow Plastic SSOP –40°C to 125°C LTC3766IGN#PBF LTC3766IGN#TRPBF LTC3766GN 28-Lead Narrow Plastic SSOP –40°C to 125°C LTC3766HGN#PBF LTC3766HGN#TRPBF LTC3766GN 28-Lead Narrow Plastic SSOP –40°C to 150°C LTC3766MPGN#PBF LTC3766MPGN#TRPBF LTC3766GN 28-Lead Narrow Plastic SSOP –55°C to 150°C LTC3766EUFD#PBF LTC3766EUFD#TRPBF 3766 28-Lead (4mm × 5mm) Plastic QFN –40°C to 125°C LTC3766IUFD#PBF LTC3766IUFD#TRPBF 3766 28-Lead (4mm × 5mm) Plastic QFN –40°C to 125°C LTC3766HUFD#PBF LTC3766HUFD#TRPBF 3766 28-Lead (4mm × 5mm) Plastic QFN –40°C to 150°C LTC3766MPUFD#PBF LTC3766MPUFD#TRPBF 3766 28-Lead (4mm × 5mm) Plastic QFN –55°C to 150°C Consult LTC Marketing for parts specified with wider operating temperature ranges. *The temperature grade is identified by a label on the shipping container. For more information on lead free part marking, go to: http://www.linear.com/leadfree/ For more information on tape and reel specifications, go to: http://www.linear.com/tapeandreel/. Some packages are available in 500 unit reels through designated sales channels with #TRMPBF suffix.
ELECTRICAL CHARACTERISTICS The
l
denotes the specifications which apply over the specified operating junction temperature range, otherwise specifications are at TA = 25°C. (Note 2) VIN = 15V, GND = PGND = 0V, unless otherwise noted. SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS Main Control Loop
VFB Regulated Feedback Voltage (Note 4) ITH = 1.2V l 0.592 0.600 0.608 V IFB Feedback Input Current (Note 4) 2 50 nA ΔVFB(LINREG) Feedback Voltage Line Regulation VIN = 5V to 32V, ITH = 1.2V 0.001 %/V ΔVFB(LOADREG) Feedback Voltage Load Regulation Measured in Servo Loop, ITH = 0.5V to 2V l –0.01 –0.1 % VISAVG Average Current Sense Threshold Resistor Sense (RS) Mode 47 55 63 mV Current Transformer (CT) Mode 0.66 0.73 0.80 V VISADJ Current Sense Ripple Compensation RS Mode 10 mV CT Mode 140 mV V + SW = 10V, VS = 5V, FS/SYNC = VCC, RIPK = 23.7k V – ISOC Overcurrent Shutdown Threshold RS Mode: VIS = 0V 86 100 113 mV CT Mode: V – IS = VCC 1.22 1.33 1.44 V I + – SIN IS and IS Input Current 280 500 nA gm Error Amplifier gm 2.2 2.7 3.2 mS REA Error Amplifier Output Resistance (Note 7) 5 MΩ ISOFT(C) Soft-Start Charge Current VSS = 2V 4 5 6 μA ISOFT(D) Soft-Start Discharge Current VSS = 2V 3 μA VRUNR RUN Pin On Threshold VRUN Rising l 1.18 1.22 1.26 V VRUNF RUN Pin Off Threshold VRUN Falling l 1.13 1.17 1.21 V IRUN RUN Pin Hysteresis Current VRUN = 0.5V 2.2 3.0 3.6 μA tON(MIN) Minimum Controllable On Time 200 ns DMAX Maximum Duty Cycle FGD = SGD = GND 77 79 81 % ΔVSEC(TH) Volt-Second Limit Threshold Accuracy 2V ≤ VSW < 5V –6 6 % 5V ≤ VSW ≤ 40V –4 4 % RVSDN Volt-Second Discharge Resistance 75 Ω VSWCL SW Clamp Voltage ISW = 1mA 43 51 60 V ΔVFB(OV) Output Overvoltage Threshold VFB Rising 15 17 19 % 3766fc For more information www.linear.com/LTC3766 3 Document Outline Features Applications Description Typical Application Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Timing Diagram Operation Applications Information Typical Applications Package Description Typical Application Related Parts Features Applications Typical Application Description Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Timing Diagram Operation Applications Information Typical Applications Typical Applications Typical Applications Package Description Revision History Typical Application Related Parts