Datasheet LTC3860 (Analog Devices) - 4
| 制造商 | Analog Devices |
| 描述 | Dual, Multiphase Step-Down Voltage Mode DC/DC Controller with Current Sharing |
| 页数 / 页 | 36 / 4 — ELECTRICAL CHARACTERISTICS. The. denotes the specifi cations which apply … |
| 文件格式/大小 | PDF / 451 Kb |
| 文件语言 | 英语 |
ELECTRICAL CHARACTERISTICS. The. denotes the specifi cations which apply over the full operating
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LTC3860
ELECTRICAL CHARACTERISTICS The
l
denotes the specifi cations which apply over the full operating junction temperature range, otherwise specifi cations are at TA = 25°C (Note 3). VCC = 5V, VRUN1,2 = 5V, VFREQ = VCLKIN = 0V, VFB = 0.6V, fOSC = 0.6MHz unless otherwise specifi ed. SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
IFREQ FREQ Pin Output Current VFREQ = 0.8V 19 21 23 μA tCLKIN(HI) CLKIN Pulse Width High VCLKIN = 0V to 5V 100 ns tCLKIN(LO) CLKIN Pulse Width Low VCLKIN = 0V to 5V 100 ns RCLKIN CLKIN Pull-Up Resistance 13 kΩ VCLKIN CLKIN Input Threshold VCLKIN Falling 1.2 V VCLKIN Rising 2 V VFREQ FREQ Input Threshold VCLKIN = 0V VFREQ Falling 1.5 V VFREQ Rising 2.5 V VOL(CLKOUT) CLKOUT Low Output Voltage ILOAD = –500μA 0.2 V VOH(CLKOUT) CLKOUT High Output Voltage ILOAD = 500μA VCC – 0.2 V θ2-θ1 Channel 1-to-Channel 2 Phase Relationship VPHSMD = 0V 180 Deg VPHSMD = Float 180 Deg VPHSMD = VCC 120 Deg θCLKOUT-θ1 CLKOUT-to-Channel 1 Phase Relationship VPHSMD = 0V 60 Deg VPHSMD = Float 90 Deg VPHSMD = VCC 240 Deg
PWM/PWMEN Outputs
PWM PWM Output High Voltage ILOAD = 500μA l 4.5 V PWM Output Low Voltage ILOAD = –500μA l 0.5 V PWM Output Current in Hi-Z State ±5 μA PWM Maximum Duty Cycle 91.5 % PWMEN PWMEN Output High Voltage ILOAD = 1mA l 4.5 V
Note 1:
Stresses beyond those listed under Absolute Maximum Ratings
Note 3:
The LTC3860 is tested under pulsed load conditions such that may cause permanent damage to the device. Exposure to any Absolute TJ ≈ TA. The LTC3860E is guaranteed to meet performance specifi cations Maximum Rating condition for extended periods may affect device from 0°C to 85°C junction temperature. Specifi cations over the –40°C reliability and lifetime. to 125°C operating junction temperature range are assured by design,
Note 2:
T characterization and correlation with statistical process controls. The J is calculated from the ambient temperature TA and power dissipation P LTC3860I is guaranteed over the full –40°C to 125°C operating junction D according to the following formula: temperature range. The maximum ambient temperature consistent with TJ = TA + (PD • θJA) these specifi cations is determined by specifi c operating conditions in conjunction with board layout, the rated package thermal resistors and other environmental factors. 3860fc 4 Document Outline FEATURES DESCRIPTION APPLICATIONS TYPICAL APPLICATION ABSOLUTE MAXIMUM RATINGS PIN CONFIGURATION ORDER INFORMATION ELECTRICAL CHARACTERISTICS TYPICAL PERFORMANCE CHARACTERISTICS PIN FUNCTIONS FUNCTIONAL DIAGRAM OPERATION APPLICATIONS INFORMATION TYPICAL APPLICATIONS PACKAGE DESCRIPTION REVISION HISTORY TYPICAL APPLICATION RELATED PARTS
ELECTRICAL CHARACTERISTICS The
l
denotes the specifi cations which apply over the full operating junction temperature range, otherwise specifi cations are at TA = 25°C (Note 3). VCC = 5V, VRUN1,2 = 5V, VFREQ = VCLKIN = 0V, VFB = 0.6V, fOSC = 0.6MHz unless otherwise specifi ed. SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
IFREQ FREQ Pin Output Current VFREQ = 0.8V 19 21 23 μA tCLKIN(HI) CLKIN Pulse Width High VCLKIN = 0V to 5V 100 ns tCLKIN(LO) CLKIN Pulse Width Low VCLKIN = 0V to 5V 100 ns RCLKIN CLKIN Pull-Up Resistance 13 kΩ VCLKIN CLKIN Input Threshold VCLKIN Falling 1.2 V VCLKIN Rising 2 V VFREQ FREQ Input Threshold VCLKIN = 0V VFREQ Falling 1.5 V VFREQ Rising 2.5 V VOL(CLKOUT) CLKOUT Low Output Voltage ILOAD = –500μA 0.2 V VOH(CLKOUT) CLKOUT High Output Voltage ILOAD = 500μA VCC – 0.2 V θ2-θ1 Channel 1-to-Channel 2 Phase Relationship VPHSMD = 0V 180 Deg VPHSMD = Float 180 Deg VPHSMD = VCC 120 Deg θCLKOUT-θ1 CLKOUT-to-Channel 1 Phase Relationship VPHSMD = 0V 60 Deg VPHSMD = Float 90 Deg VPHSMD = VCC 240 Deg
PWM/PWMEN Outputs
PWM PWM Output High Voltage ILOAD = 500μA l 4.5 V PWM Output Low Voltage ILOAD = –500μA l 0.5 V PWM Output Current in Hi-Z State ±5 μA PWM Maximum Duty Cycle 91.5 % PWMEN PWMEN Output High Voltage ILOAD = 1mA l 4.5 V
Note 1:
Stresses beyond those listed under Absolute Maximum Ratings
Note 3:
The LTC3860 is tested under pulsed load conditions such that may cause permanent damage to the device. Exposure to any Absolute TJ ≈ TA. The LTC3860E is guaranteed to meet performance specifi cations Maximum Rating condition for extended periods may affect device from 0°C to 85°C junction temperature. Specifi cations over the –40°C reliability and lifetime. to 125°C operating junction temperature range are assured by design,
Note 2:
T characterization and correlation with statistical process controls. The J is calculated from the ambient temperature TA and power dissipation P LTC3860I is guaranteed over the full –40°C to 125°C operating junction D according to the following formula: temperature range. The maximum ambient temperature consistent with TJ = TA + (PD • θJA) these specifi cations is determined by specifi c operating conditions in conjunction with board layout, the rated package thermal resistors and other environmental factors. 3860fc 4 Document Outline FEATURES DESCRIPTION APPLICATIONS TYPICAL APPLICATION ABSOLUTE MAXIMUM RATINGS PIN CONFIGURATION ORDER INFORMATION ELECTRICAL CHARACTERISTICS TYPICAL PERFORMANCE CHARACTERISTICS PIN FUNCTIONS FUNCTIONAL DIAGRAM OPERATION APPLICATIONS INFORMATION TYPICAL APPLICATIONS PACKAGE DESCRIPTION REVISION HISTORY TYPICAL APPLICATION RELATED PARTS