Datasheet LTC3777 (Analog Devices) - 3
| Manufacturer | Analog Devices |
| Description | 150V VIN and VOUT Synchronous 4-Switch Buck-Boost Controller + Switching Bias Supply |
| Pages / Page | 40 / 3 — ELECTRICAL CHARACTERISTICS The. denotes the specifications which apply … |
| Revision | A |
| File Format / Size | PDF / 2.8 Mb |
| Document Language | English |
ELECTRICAL CHARACTERISTICS The. denotes the specifications which apply over the specified operating
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LTC3777
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, VRUN = 5V, VEXTVCC = 0V, VDRVSET = 0V, VVINOV = 0V unless otherwise noted. SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
VIN Input Supply Operating Voltage Range (Note 4) 4.5 150 V VOUT Output Supply Operating Voltage Range 1.2 150 V Regulated Feedback Voltage (Note 5); ITH Voltage = 1.4V l 1.188 1.2 1.212 V Feedback Current (Note 5) –15 -50 nA Reference Voltage Line Regulation (Note 5); VIN = 7V to 100V 0.02 0.2 % Output Voltage Load Regulation (Note 5); Measured in Servo Loop; ∆ITH l 0.01 0.2 % Voltage = 1.5V to 2V Transconductance Amplifier gm (Note 5); ITH = 1.4V; Sink/Source 5µA 1.5 mmho IQ Input DC Supply Current (Note 6) 3.6 5.5 mA Shutdown RUN = 0V 40 75 µA Undervoltage Lockout V5 Ramping Up 4.1 4.35 4.6 V V5 Ramping Down 3.6 3.85 4.1 V RUN Pin ON Threshold VRUN Rising 1.1 1.2 1.3 V RUN Pin Hysteresis 100 mV RUN Pin Source Current VRUN < 1.2V 2.5 µA RUN Pin Hysteresis Current VRUN > 1.2V 6.5 µA VIN Overvoltage Lockout Threshold VVINOV Rising 1.18 1.28 1.38 V (Rising) VIN Overvoltage Hysteresis 50 mV SENSE Pins Current VSENSEP = VSENSEN = 0 ±2 µA IAVGSNSP IAVGSNS Pins Current VIAVGSNSP = VIAVGSNSN = 10V 15 µA IAVGSNSN Soft-Start Charge Current VSS = 0V 4 5 6 µA VSENSE(MAX) Maximum Current Sense Threshold VFB = 1V l 70 90 110 mV (Buck Region Valley Current Mode) Maximum Current Sense Threshold VFB = 1V l 120 140 160 mV (Boost Region Peak Current Mode) Maximum Input / Output Average VIAVGSNSP = VIAVGSNSN = 10V, VFB = 1V 47.5 50 52.5 mV Current Sense Threshold DC(MAX, BOOST) Maximum Duty Factor % Switch C On 90 % DC(MIN, BOOST) Minimum Duty Factor for Main Switch in % Switch C On 9 % Boost Operation DC(MIN, BUCK) Minimum Duty Factor for Main Switch in % Switch B On 9 % Buck Operation
Gate Driver
TG Pull-Up On Resistance VDRVCC = 6V 3.1 Ω TG Pull-Down On Resistance 1.5 BG Pull-Up On Resistance VDRVCC = 6V 5.5 Ω BG Pull-Down On Resistance 3 TG Transition Time: VDRVCC = 6V (Note 7) Rise Time CLOAD = 3300pF 60 ns Fall Time BG Transition Time: VDRVCC = 6V (Note 7) Rise Time CLOAD = 3300pF 60 ns Fall Time Rev A For more information www.analog.com 3 Document Outline FEATURES DESCRIPTION APPLICATIONS TYPICAL APPLICATION ABSOLUTE MAXIMUM RATINGS PIN CONFIGURATION ORDER INFORMATION ELECTRICAL CHARACTERISTICS TYPICAL PERFORMANCE CHARACTERISTICS TYPICAL PERFORMANCE CHARACTERISTICS – SWITCHING BIAS SUPPLY PIN FUNCTIONS BLOCK DIAGRAM OPERATION APPLICATIONS INFORMATION PACKAGE DESCRIPTION REVISION HISTORY TYPICAL APPLICATION RELATED PARTS
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, VRUN = 5V, VEXTVCC = 0V, VDRVSET = 0V, VVINOV = 0V unless otherwise noted. SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
VIN Input Supply Operating Voltage Range (Note 4) 4.5 150 V VOUT Output Supply Operating Voltage Range 1.2 150 V Regulated Feedback Voltage (Note 5); ITH Voltage = 1.4V l 1.188 1.2 1.212 V Feedback Current (Note 5) –15 -50 nA Reference Voltage Line Regulation (Note 5); VIN = 7V to 100V 0.02 0.2 % Output Voltage Load Regulation (Note 5); Measured in Servo Loop; ∆ITH l 0.01 0.2 % Voltage = 1.5V to 2V Transconductance Amplifier gm (Note 5); ITH = 1.4V; Sink/Source 5µA 1.5 mmho IQ Input DC Supply Current (Note 6) 3.6 5.5 mA Shutdown RUN = 0V 40 75 µA Undervoltage Lockout V5 Ramping Up 4.1 4.35 4.6 V V5 Ramping Down 3.6 3.85 4.1 V RUN Pin ON Threshold VRUN Rising 1.1 1.2 1.3 V RUN Pin Hysteresis 100 mV RUN Pin Source Current VRUN < 1.2V 2.5 µA RUN Pin Hysteresis Current VRUN > 1.2V 6.5 µA VIN Overvoltage Lockout Threshold VVINOV Rising 1.18 1.28 1.38 V (Rising) VIN Overvoltage Hysteresis 50 mV SENSE Pins Current VSENSEP = VSENSEN = 0 ±2 µA IAVGSNSP IAVGSNS Pins Current VIAVGSNSP = VIAVGSNSN = 10V 15 µA IAVGSNSN Soft-Start Charge Current VSS = 0V 4 5 6 µA VSENSE(MAX) Maximum Current Sense Threshold VFB = 1V l 70 90 110 mV (Buck Region Valley Current Mode) Maximum Current Sense Threshold VFB = 1V l 120 140 160 mV (Boost Region Peak Current Mode) Maximum Input / Output Average VIAVGSNSP = VIAVGSNSN = 10V, VFB = 1V 47.5 50 52.5 mV Current Sense Threshold DC(MAX, BOOST) Maximum Duty Factor % Switch C On 90 % DC(MIN, BOOST) Minimum Duty Factor for Main Switch in % Switch C On 9 % Boost Operation DC(MIN, BUCK) Minimum Duty Factor for Main Switch in % Switch B On 9 % Buck Operation
Gate Driver
TG Pull-Up On Resistance VDRVCC = 6V 3.1 Ω TG Pull-Down On Resistance 1.5 BG Pull-Up On Resistance VDRVCC = 6V 5.5 Ω BG Pull-Down On Resistance 3 TG Transition Time: VDRVCC = 6V (Note 7) Rise Time CLOAD = 3300pF 60 ns Fall Time BG Transition Time: VDRVCC = 6V (Note 7) Rise Time CLOAD = 3300pF 60 ns Fall Time Rev A For more information www.analog.com 3 Document Outline FEATURES DESCRIPTION APPLICATIONS TYPICAL APPLICATION ABSOLUTE MAXIMUM RATINGS PIN CONFIGURATION ORDER INFORMATION ELECTRICAL CHARACTERISTICS TYPICAL PERFORMANCE CHARACTERISTICS TYPICAL PERFORMANCE CHARACTERISTICS – SWITCHING BIAS SUPPLY PIN FUNCTIONS BLOCK DIAGRAM OPERATION APPLICATIONS INFORMATION PACKAGE DESCRIPTION REVISION HISTORY TYPICAL APPLICATION RELATED PARTS
