Datasheet LTC7815 (Analog Devices) - 6
| Manufacturer | Analog Devices |
| Description | Low IQ, 2.25MHz, Triple Output, Buck/Buck/Boost Synchronous Controller |
| Pages / Page | 38 / 6 — 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
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LTC7815
ELECTRICAL CHARACTERISTICS The
l
denotes the specifications which apply over the specified operating junction temperature range, otherwise specifications are at TA = 25°C (Notes 2, 4). VBIAS = 12V, VRUN1,2,3 = 5V, EXTVCC = 0V unless otherwise noted. SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS PGOOD1 Output
VPGL1 PGOOD1 Voltage Low IPGOOD1 = 2mA 0.2 0.4 V IPGOOD1 PGOOD1 Leakage Current VPGOOD1 = 5V ±1 µA VPG1 PGOOD1 Trip Level VFB1 with Respect to Set Regulated Voltage VFB1 Ramping Negative –13 –10 –7 % Hysteresis 2.5 % VFB1 Ramping Positive 7 10 13 % Hysteresis 2.5 % TPG1 Delay For Reporting a Fault 40 µs
OV3 Boost Overvoltage Indicator Output
VOV3L OV3 Voltage Low IOV3 = 2mA 0.2 0.4 V IOV3 OV3 Leakage Current VOV3 = 5V ±1 µA VOV OV3 Trip Level VFB3 Ramping Positive with Respect to Set 6 10 13 % Regulated Voltage Hysteresis 1.5 %
BOOST3 Charge Pump
IBST3 BOOST3 Charge Pump Available Output VBOOST3 = 16V; VSW3 = 12V; 65 µA Current Forced Continuous Mode
Note 1:
Stresses beyond those listed under Absolute Maximum Ratings Continuous operation above the specified absolute maximum operating may cause permanent damage to the device. Exposure to any Absolute junction temperature may impair device reliability or permanently damage Maximum Rating condition for extended periods may affect device the device. reliability and lifetime.
Note 4:
The LTC7815 is tested in a feedback loop that servos VITH1,2,3 to
Note 2:
The LTC7815 is tested under pulsed load conditions such that a specified voltage and measures the resultant VFB. The specification at TJ ≈ TA. The LTC7815E is guaranteed to meet performance specifications 85°C is not tested in production and is assured by design, characterization from 0°C to 85°C. Specifications over the –40°C to 125°C operating and correlation to production testing at other temperatures (125°C for junction temperature range are assured by design, characterization and the LTC7815E/LTC7815I, 150°C for the LTC7815H). For the LTC7815I correlation with statistical process controls. The LTC7815I is guaranteed and LTC7815H, the specification at 0°C is not tested in production and is over the –40°C to 125°C operating junction temperature range and the assured by design, characterization and correlation to production testing LTC7815H is guaranteed over the –40°C to 150°C operating junction at –40°C. temperature range. High junction temperatures degrade operating
Note 5:
Dynamic supply current is higher due to the gate charge being lifetimes; operating lifetime is derated for junction temperatures greater delivered at the switching frequency. See the Applications Information than 125°C. Note that the maximum ambient temperature consistent with section. these specifications is determined by specific operating conditions in
Note 6:
Rise and fall times are measured using 10% and 90% levels. Delay conjunction with board layout, the rated package thermal impedance and times are measured using 50% levels. other environmental factors. TJ is calculated from the ambient temperature T
Note 7:
The minimum on-time condition is specified for an inductor A and power dissipation PD according to the following formula: TJ = TA + (P peak-to-peak ripple current ≥ 40% of IMAX (See the Minimum On-Time D • θJA), where θJA = 34.7°C/W. Considerations in the Applications Information section).
Note 3:
This IC includes overtemperature protection that is intended to protect the device during momentary overload conditions. The maximum
Note 8:
Do not apply a voltage or current source to these pins. They must rated junction temperature will be exceeded when this protection is active. be connected to capacitive loads only, otherwise permanent damage may occur. 7815f 6 For more information www.linear.com/LTC7815 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 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 (Notes 2, 4). VBIAS = 12V, VRUN1,2,3 = 5V, EXTVCC = 0V unless otherwise noted. SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS PGOOD1 Output
VPGL1 PGOOD1 Voltage Low IPGOOD1 = 2mA 0.2 0.4 V IPGOOD1 PGOOD1 Leakage Current VPGOOD1 = 5V ±1 µA VPG1 PGOOD1 Trip Level VFB1 with Respect to Set Regulated Voltage VFB1 Ramping Negative –13 –10 –7 % Hysteresis 2.5 % VFB1 Ramping Positive 7 10 13 % Hysteresis 2.5 % TPG1 Delay For Reporting a Fault 40 µs
OV3 Boost Overvoltage Indicator Output
VOV3L OV3 Voltage Low IOV3 = 2mA 0.2 0.4 V IOV3 OV3 Leakage Current VOV3 = 5V ±1 µA VOV OV3 Trip Level VFB3 Ramping Positive with Respect to Set 6 10 13 % Regulated Voltage Hysteresis 1.5 %
BOOST3 Charge Pump
IBST3 BOOST3 Charge Pump Available Output VBOOST3 = 16V; VSW3 = 12V; 65 µA Current Forced Continuous Mode
Note 1:
Stresses beyond those listed under Absolute Maximum Ratings Continuous operation above the specified absolute maximum operating may cause permanent damage to the device. Exposure to any Absolute junction temperature may impair device reliability or permanently damage Maximum Rating condition for extended periods may affect device the device. reliability and lifetime.
Note 4:
The LTC7815 is tested in a feedback loop that servos VITH1,2,3 to
Note 2:
The LTC7815 is tested under pulsed load conditions such that a specified voltage and measures the resultant VFB. The specification at TJ ≈ TA. The LTC7815E is guaranteed to meet performance specifications 85°C is not tested in production and is assured by design, characterization from 0°C to 85°C. Specifications over the –40°C to 125°C operating and correlation to production testing at other temperatures (125°C for junction temperature range are assured by design, characterization and the LTC7815E/LTC7815I, 150°C for the LTC7815H). For the LTC7815I correlation with statistical process controls. The LTC7815I is guaranteed and LTC7815H, the specification at 0°C is not tested in production and is over the –40°C to 125°C operating junction temperature range and the assured by design, characterization and correlation to production testing LTC7815H is guaranteed over the –40°C to 150°C operating junction at –40°C. temperature range. High junction temperatures degrade operating
Note 5:
Dynamic supply current is higher due to the gate charge being lifetimes; operating lifetime is derated for junction temperatures greater delivered at the switching frequency. See the Applications Information than 125°C. Note that the maximum ambient temperature consistent with section. these specifications is determined by specific operating conditions in
Note 6:
Rise and fall times are measured using 10% and 90% levels. Delay conjunction with board layout, the rated package thermal impedance and times are measured using 50% levels. other environmental factors. TJ is calculated from the ambient temperature T
Note 7:
The minimum on-time condition is specified for an inductor A and power dissipation PD according to the following formula: TJ = TA + (P peak-to-peak ripple current ≥ 40% of IMAX (See the Minimum On-Time D • θJA), where θJA = 34.7°C/W. Considerations in the Applications Information section).
Note 3:
This IC includes overtemperature protection that is intended to protect the device during momentary overload conditions. The maximum
Note 8:
Do not apply a voltage or current source to these pins. They must rated junction temperature will be exceeded when this protection is active. be connected to capacitive loads only, otherwise permanent damage may occur. 7815f 6 For more information www.linear.com/LTC7815 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 TYPICAL APPLICATION RELATED PARTS
