Datasheet LTC3892, LTC3892-1, LTC3892-2 (Analog Devices) - 5
| Manufacturer | Analog Devices |
| Description | 60V Low IQ, Dual, 2-Phase Synchronous Step-Down DC/DC Controller |
| Pages / Page | 38 / 5 — ELECTRICAL CHARACTERISTICS. The. denotes the specifications which apply … |
| File Format / Size | PDF / 1.4 Mb |
| Document Language | English |
ELECTRICAL CHARACTERISTICS. The. denotes the specifications which apply over the specified operating
Model Line for this Datasheet
- LTC3892EFE-1#PBF LTC3892EFE-1#TRPBF LTC3892EUH#PBF LTC3892EUH#TRPBF LTC3892EUH-2#PBF LTC3892EUH-2#TRPBF LTC3892HFE-1#PBF LTC3892HFE-1#TRPBF LTC3892HUH#PBF LTC3892HUH#TRPBF LTC3892HUH-2#PBF LTC3892HUH-2#TRPBF LTC3892IFE-1#PBF LTC3892IFE-1#TRPBF LTC3892IUH#PBF LTC3892IUH#TRPBF LTC3892IUH-2#PBF LTC3892IUH-2#TRPBF LTC3892MPFE-1#PBF LTC3892MPFE-1#TRPBF LTC3892MPUH#PBF LTC3892MPUH#TRPBF LTC3892MPUH-2#PBF LTC3892MPUH-2#TRPBF
Text Version of Document
LTC3892/ LTC3892-1/LTC3892-2
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 = 12V, VRUN1,2 = 5V, VEXTVCC = 0V, VDRVSET = 0V, VPRG1 = FLOAT unless otherwise noted. SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
VRUN1,2 ON RUN Pin On Threshold VRUN1, VRUN2 Rising l 1.22 1.275 1.33 V VRUN1,2 Hyst RUN Pin Hysteresis 75 mV VSENSE(MAX) Maximum Current Sense Threshold VFB1,2 = 0.7V, VSENSE1,2– = 3.3V ILIM = FLOAT (LTC3892/LTC3892-2) or LTC3892-1 l 66 75 84 mV ILIM = 0V (LTC3892/LTC3892-2) l 43 50 58 mV ILIM = INTVCC (LTC3892/LTC3892-2) l 90 100 109 mV VSENSE(MATCH) Matching Between VSENSE1(MAX) and VFB1,2 = 0.7V, VSENSE1,2– = 3.3V VSENSE2(MAX) ILIM = FLOAT (LTC3892/LTC3892-2) or LTC3892-1 l –8 0 8 mV ILIM = 0V (LTC3892/LTC3892-2) l –8 0 8 mV ILIM = INTVCC (LTC3892/LTC3892-2) l –8 0 8 mV
Gate Driver
TG1,2 Pull-Up On-Resistance VDRVSET = INTVCC 2.2 Ω Pull-Down On-Resistance 1.0 Ω BG1,2 Pull-Up On-Resistance VDRVSET = INTVCC 2.2 Ω Pull-Down On-Resistance 1.0 Ω BDSW1,2 BOOST to DRVCC Switch On- VSW = 0V, VDRVSET = INTVCC 3.7 Ω Resistance TG Transition Time: (Note 6) VDRVSET = INTVCC TG1,2 tr Rise Time CLOAD = 3300pF 25 ns TG1,2 tf Fall Time CLOAD = 3300pF 15 ns BG Transition Time: (Note 6) VDRVSET = INTVCC BG1,2 tr Rise Time CLOAD = 3300pF 25 ns BG1,2 tf Fall Time CLOAD = 3300pF 15 ns TG/BG t1D Top Gate Off to Bottom Gate On CLOAD = 3300pF Each Driver, VDRVSET = INTVCC 55 ns Delay Synchronous Switch-On Delay Time BG/TG t1D Bottom Gate Off to Top Gate On CLOAD = 3300pF Each Driver, VDRVSET = INTVCC 50 ns Delay Top Switch-On Delay Time tON(MIN)1,2 TG Minimum On-Time (Note 7) VDRVSET = INTVCC 80 ns
DRVCC Linear Regulator
VDRVCC(INT) DRVCC Voltage from Internal VIN LDO VEXTVCC = 0V 7V < VIN < 60V, DRVSET = 0V 5.8 6.0 6.2 V 11V < VIN < 60V, DRVSET = INTVCC 9.6 10.0 10.4 V VLDOREG(INT) DRVCC Load Regulation from VIN ICC = 0mA to 50mA, VEXTVCC = 0V 0.9 2.0 % LDO VDRVCC(EXT) DRVCC Voltage from Internal EXTVCC 7V < VEXTVCC < 13V, DRVSET = 0V 5.8 6.0 6.2 V LDO 11V < VEXTVCC < 13V, DRVSET = INTVCC 9.6 10.0 10.4 V VLDOREG(EXT) DRVCC Load Regulation from Internal ICC = 0mA to 50mA, VEXTVCC = 8.5V, 0.7 2.0 % EXTVCC LDO VDRVSET = 0V VEXTVCC EXTVCC LDO Switchover Voltage EXTVCC Ramping Positive DRVUV = 0V 4.5 4.7 4.9 V DRVUV = INTVCC 7.4 7.7 8.0 V VLDOHYS EXTVCC Hysteresis 250 mV VDRVCC(50kΩ) Programmable DRVCC RDRVSET = 50kΩ, VEXTVCC = 0V 5.0 V VDRVCC(70kΩ) Programmable DRVCC RDRVSET = 70kΩ, VEXTVCC = 0V 6.4 7.0 7.6 V VDRVCC(90kΩ) Programmable DRVCC RDRVSET = 90kΩ, VEXTVCC = 0V 9.0 V 38921fc For more information www.linear.com/LTC3892 5 Document Outline Features Applications Description Typical Application Absolute Maximum Ratings Pin Configuration Order Information Typical Performance Characteristics Pin Functions Functional Diagrams Operation Package Description 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 = 12V, VRUN1,2 = 5V, VEXTVCC = 0V, VDRVSET = 0V, VPRG1 = FLOAT unless otherwise noted. SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
VRUN1,2 ON RUN Pin On Threshold VRUN1, VRUN2 Rising l 1.22 1.275 1.33 V VRUN1,2 Hyst RUN Pin Hysteresis 75 mV VSENSE(MAX) Maximum Current Sense Threshold VFB1,2 = 0.7V, VSENSE1,2– = 3.3V ILIM = FLOAT (LTC3892/LTC3892-2) or LTC3892-1 l 66 75 84 mV ILIM = 0V (LTC3892/LTC3892-2) l 43 50 58 mV ILIM = INTVCC (LTC3892/LTC3892-2) l 90 100 109 mV VSENSE(MATCH) Matching Between VSENSE1(MAX) and VFB1,2 = 0.7V, VSENSE1,2– = 3.3V VSENSE2(MAX) ILIM = FLOAT (LTC3892/LTC3892-2) or LTC3892-1 l –8 0 8 mV ILIM = 0V (LTC3892/LTC3892-2) l –8 0 8 mV ILIM = INTVCC (LTC3892/LTC3892-2) l –8 0 8 mV
Gate Driver
TG1,2 Pull-Up On-Resistance VDRVSET = INTVCC 2.2 Ω Pull-Down On-Resistance 1.0 Ω BG1,2 Pull-Up On-Resistance VDRVSET = INTVCC 2.2 Ω Pull-Down On-Resistance 1.0 Ω BDSW1,2 BOOST to DRVCC Switch On- VSW = 0V, VDRVSET = INTVCC 3.7 Ω Resistance TG Transition Time: (Note 6) VDRVSET = INTVCC TG1,2 tr Rise Time CLOAD = 3300pF 25 ns TG1,2 tf Fall Time CLOAD = 3300pF 15 ns BG Transition Time: (Note 6) VDRVSET = INTVCC BG1,2 tr Rise Time CLOAD = 3300pF 25 ns BG1,2 tf Fall Time CLOAD = 3300pF 15 ns TG/BG t1D Top Gate Off to Bottom Gate On CLOAD = 3300pF Each Driver, VDRVSET = INTVCC 55 ns Delay Synchronous Switch-On Delay Time BG/TG t1D Bottom Gate Off to Top Gate On CLOAD = 3300pF Each Driver, VDRVSET = INTVCC 50 ns Delay Top Switch-On Delay Time tON(MIN)1,2 TG Minimum On-Time (Note 7) VDRVSET = INTVCC 80 ns
DRVCC Linear Regulator
VDRVCC(INT) DRVCC Voltage from Internal VIN LDO VEXTVCC = 0V 7V < VIN < 60V, DRVSET = 0V 5.8 6.0 6.2 V 11V < VIN < 60V, DRVSET = INTVCC 9.6 10.0 10.4 V VLDOREG(INT) DRVCC Load Regulation from VIN ICC = 0mA to 50mA, VEXTVCC = 0V 0.9 2.0 % LDO VDRVCC(EXT) DRVCC Voltage from Internal EXTVCC 7V < VEXTVCC < 13V, DRVSET = 0V 5.8 6.0 6.2 V LDO 11V < VEXTVCC < 13V, DRVSET = INTVCC 9.6 10.0 10.4 V VLDOREG(EXT) DRVCC Load Regulation from Internal ICC = 0mA to 50mA, VEXTVCC = 8.5V, 0.7 2.0 % EXTVCC LDO VDRVSET = 0V VEXTVCC EXTVCC LDO Switchover Voltage EXTVCC Ramping Positive DRVUV = 0V 4.5 4.7 4.9 V DRVUV = INTVCC 7.4 7.7 8.0 V VLDOHYS EXTVCC Hysteresis 250 mV VDRVCC(50kΩ) Programmable DRVCC RDRVSET = 50kΩ, VEXTVCC = 0V 5.0 V VDRVCC(70kΩ) Programmable DRVCC RDRVSET = 70kΩ, VEXTVCC = 0V 6.4 7.0 7.6 V VDRVCC(90kΩ) Programmable DRVCC RDRVSET = 90kΩ, VEXTVCC = 0V 9.0 V 38921fc For more information www.linear.com/LTC3892 5 Document Outline Features Applications Description Typical Application Absolute Maximum Ratings Pin Configuration Order Information Typical Performance Characteristics Pin Functions Functional Diagrams Operation Package Description Typical Application Related Parts
