Datasheet LT3506, LT3506A (Analog Devices) - 3
| Manufacturer | Analog Devices |
| Description | Dual Monolithic 1.6A Step-Down Switching Regulator |
| Pages / Page | 24 / 3 — The. ELECTRICAL CHARACTERISTICS. denotes the specifi cations which apply … |
| File Format / Size | PDF / 221 Kb |
| Document Language | English |
The. ELECTRICAL CHARACTERISTICS. denotes the specifi cations which apply over the full operating
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LT3506/LT3506A
The ELECTRICAL CHARACTERISTICS
l
denotes the specifi cations which apply over the full operating temperature range, otherwise specifi cations are at TA = 25°C, VIN = 5V, VBOOST = 8V, unless otherwise noted. (Note 2) SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
VIN(MIN) Undervoltage Lockout l 3.4 3.6 V IINQ Quiescent Current Not Switching 3.8 4.8 mA IINSD Shutdown Current VRUNSS = 0V 30 45 μA VFB Feedback Voltage –40°C to 85°C, DHD l 792 800 808 mV –40°C to 85°C, EFE l 784 800 816 mV –40°C to 125°C, IFE l 784 800 816 mV IFB FB Pin Bias Current VFB = 800mV, VC = 0.4V l 40 100 nA VFB(REG) Reference Line Regulation VIN = 5V to 25V 0.005 %/V gmEA Error Amp GM 350 μMhos AV Error Amp Voltage Gain 400 IVC VC Source Current VFB = 0.6V, VC = 0V 30 μA VC Sink Current VFB = 1.2V, VC = 1100mV 30 μA VVC(THRESH) VC Switching Threshold 0.7 V VVC(CLAMP) VC Clamp Voltage 1.9 V fSW Switching Frequency LT3506 500 575 650 kHz LT3506A 1 1.1 1.2 MHz Switching Phase (Note 5) 180 Deg DC Maximum Duty Cycle LT3506 89 93 % LT3506A 78 88 % VFB(SWTHRESH) Frequency Shift Threshold on FB 0.4 V fFOLD Foldback Frequency VFB = 0V 170 kHz ISW Switch Current Limit (Note 3) 2.0 2.6 3.6 A VSW(SAT) Switch VCESAT (Note 4) ISW = 1A 210 mV ILSW Switch Leakage Current 10 μA VBOOST(MIN) Minimum Boost Voltage Above Switch ISW = 1A 1.5 2.5 V IBOOST BOOST Pin Current ISW = 1A 20 30 mA IRUN/SS RUN/SS Current 2.1 μA VRUN/SS(THRESH) RUN/SS Threshold 0.3 0.8 V VFB(PGTHRESH) VFB PG Threshold VFB Rising 720 mV VPG(LOW) PG Voltage Output Low VFB = 640mV, IPG = 250μA 0.22 0.4 V ILPG PG Pin Leakage VPG = 2V 0.1 1 μA
Note 1:
Stresses beyond those listed under Absolute Maximum Ratings correlation with statistical process controls. The LT3506I/LT3506AI are may cause permanent damage to the device. Exposure to any Absolute guaranteed and tested over the full –40°C to 125°C operating temperature Maximum Rating condition for extended periods may affect device range. reliability and lifetime.
Note 3:
Current limit is guaranteed by design and/or correlation to static
Note 2:
The LT3506E/LT3506AE are guaranteed to meet performance test. Slope compensation reduces current limit at high duty cycle. specifi cations from 0°C to 85°C. Specifi cations over the –40°C to 85°C
Note 4:
Switch VCESAT guaranteed by design. operating temperature range are assured by design, characterization and
Note 5:
Switching phase is guaranteed by design. 3506afc 3
The ELECTRICAL CHARACTERISTICS
l
denotes the specifi cations which apply over the full operating temperature range, otherwise specifi cations are at TA = 25°C, VIN = 5V, VBOOST = 8V, unless otherwise noted. (Note 2) SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
VIN(MIN) Undervoltage Lockout l 3.4 3.6 V IINQ Quiescent Current Not Switching 3.8 4.8 mA IINSD Shutdown Current VRUNSS = 0V 30 45 μA VFB Feedback Voltage –40°C to 85°C, DHD l 792 800 808 mV –40°C to 85°C, EFE l 784 800 816 mV –40°C to 125°C, IFE l 784 800 816 mV IFB FB Pin Bias Current VFB = 800mV, VC = 0.4V l 40 100 nA VFB(REG) Reference Line Regulation VIN = 5V to 25V 0.005 %/V gmEA Error Amp GM 350 μMhos AV Error Amp Voltage Gain 400 IVC VC Source Current VFB = 0.6V, VC = 0V 30 μA VC Sink Current VFB = 1.2V, VC = 1100mV 30 μA VVC(THRESH) VC Switching Threshold 0.7 V VVC(CLAMP) VC Clamp Voltage 1.9 V fSW Switching Frequency LT3506 500 575 650 kHz LT3506A 1 1.1 1.2 MHz Switching Phase (Note 5) 180 Deg DC Maximum Duty Cycle LT3506 89 93 % LT3506A 78 88 % VFB(SWTHRESH) Frequency Shift Threshold on FB 0.4 V fFOLD Foldback Frequency VFB = 0V 170 kHz ISW Switch Current Limit (Note 3) 2.0 2.6 3.6 A VSW(SAT) Switch VCESAT (Note 4) ISW = 1A 210 mV ILSW Switch Leakage Current 10 μA VBOOST(MIN) Minimum Boost Voltage Above Switch ISW = 1A 1.5 2.5 V IBOOST BOOST Pin Current ISW = 1A 20 30 mA IRUN/SS RUN/SS Current 2.1 μA VRUN/SS(THRESH) RUN/SS Threshold 0.3 0.8 V VFB(PGTHRESH) VFB PG Threshold VFB Rising 720 mV VPG(LOW) PG Voltage Output Low VFB = 640mV, IPG = 250μA 0.22 0.4 V ILPG PG Pin Leakage VPG = 2V 0.1 1 μA
Note 1:
Stresses beyond those listed under Absolute Maximum Ratings correlation with statistical process controls. The LT3506I/LT3506AI are may cause permanent damage to the device. Exposure to any Absolute guaranteed and tested over the full –40°C to 125°C operating temperature Maximum Rating condition for extended periods may affect device range. reliability and lifetime.
Note 3:
Current limit is guaranteed by design and/or correlation to static
Note 2:
The LT3506E/LT3506AE are guaranteed to meet performance test. Slope compensation reduces current limit at high duty cycle. specifi cations from 0°C to 85°C. Specifi cations over the –40°C to 85°C
Note 4:
Switch VCESAT guaranteed by design. operating temperature range are assured by design, characterization and
Note 5:
Switching phase is guaranteed by design. 3506afc 3
