Datasheet LTC3779 (Analog Devices) - 3
| Hersteller | Analog Devices |
| Beschreibung | 150V VIN and VOUT Synchronous 4-Switch Buck-Boost Controller |
| Seiten / Seite | 38 / 3 — ELECTRICAL CHARACTERISTICS. The. denotes the specifications which apply … |
| Revision | A |
| Dateiformat / Größe | PDF / 2.6 Mb |
| Dokumentensprache | Englisch |
ELECTRICAL CHARACTERISTICS. The. denotes the specifications which apply over the specified operating
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LTC3779
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 % DCON(MIN, BOOST) Minimum Duty Factor for Main Switch in % Switch C On 9 % Boost Operation DCON(MIN, BUCK) Minimum Duty Factor for Main Switch in % Switch B On 9 % Buck Operation
Gate Driver
TG Pull-Up On Resistance VDRVCC = 9V 3.1 Ω TG Pull-Down On Resistance 1.3 BG Pull-Up On Resistance VDRVCC = 9V 5.5 Ω BG Pull-Down On Resistance 3 TG Transition Time: VDRVCC = 9V (Note 7) Rise Time CLOAD = 3300pF 60 ns Fall Time BG Transition Time: VDRVCC = 9V (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 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 % DCON(MIN, BOOST) Minimum Duty Factor for Main Switch in % Switch C On 9 % Boost Operation DCON(MIN, BUCK) Minimum Duty Factor for Main Switch in % Switch B On 9 % Buck Operation
Gate Driver
TG Pull-Up On Resistance VDRVCC = 9V 3.1 Ω TG Pull-Down On Resistance 1.3 BG Pull-Up On Resistance VDRVCC = 9V 5.5 Ω BG Pull-Down On Resistance 3 TG Transition Time: VDRVCC = 9V (Note 7) Rise Time CLOAD = 3300pF 60 ns Fall Time BG Transition Time: VDRVCC = 9V (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 PIN FUNCTIONS BLOCK DIAGRAM OPERATION APPLICATIONS INFORMATION PACKAGE DESCRIPTION REVISION HISTORY TYPICAL APPLICATION RELATED PARTS