Datasheet LT1375, LT1376 (Analog Devices) - 3

LT1375/LT1376
ELECTRICAL CHARACTERISTICS The
●
denotes specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25
°
C. TJ = 25
°
C, VIN = 15V, VC = 1.5V, boost open, switch open, unless otherwise noted. PARAMETER CONDITIONS MIN TYP MAX UNITS
Reference Voltage (Adjustable) 2.39 2.42 2.45 V ● 2.36 2.48 V Sense Voltage (Fixed 5V) 4.94 5.0 5.06 V ● 4.90 5.10 V Sense Pin Resistance 7 10 14 kΩ Reference Voltage Line Regulation 5V ≤ VIN ≤ 25V 0.01 0.03 %/ V 5V ≤ VIN ≤ 30V (LT1375HV/LT1376HV) 0.01 0.03 %/V Feedback Input Bias Current ● 0.5 1.5 µA Error Amplifier Voltage Gain VSHDN = 1V (Notes 2, 8) 200 400 Error Amplifier Transconductance VSHDN = 1V, ∆I (VC) = ±10µA (Note 8) 1500 2000 2700 µMho ● 1100 3000 µMho VC Pin to Switch Current Transconductance 2 A/ V Error Amplifier Source Current VSHDN = 1V, VFB = 2.1V or VSENSE = 4.4V ● 150 225 320 µA Error Amplifier Sink Current VSHDN = 1V, VFB = 2.7V or VSENSE = 5.6V 2 mA VC Pin Switching Threshold Duty Cycle = 0 0.9 V VC Pin High Clamp VSHDN = 1V 2.1 V Switch Current Limit VC Open, VFB = 2.1V or VSENSE = 4.4V, VBOOST = VIN + 5V DC ≤ 50% ● 1.50 2 3 A DC = 80% ● 1.35 3 A Switch On Resistance (Note 7) ISW = 1.5A, VBOOST = VIN + 5V 0.3 0.4 Ω ● 0.5 Ω Maximum Switch Duty Cycle VFB = 2.1V or VSENSE = 4.4V ● 86 93 % Switch Frequency VC Set to Give 50% Duty Cycle 460 500 540 kHz 0°C ≤ TJ ≤ 125°C 440 560 kHz ● 440 570 kHz Switch Frequency Line Regulation 5V ≤ VIN ≤ 25V ● 0.05 0.15 %/ V 5V ≤ VIN ≤ 30V (LT1375HV/LT1376HV) ● 0.05 0.15 %/V Frequency Shifting Threshold on FB Pin ∆f = 10kHz ● 0.8 1.0 1.3 V Minimum Input Voltage (Note 3) ● 5.0 5.5 V Minimum Boost Voltage (Note 4) ISW ≤ 1.5A ● 3 3.5 V Boost Current (Note 5) VBOOST = VIN + 5V ISW = 500mA ● 12 22 mA ISW = 1.5A ● 25 35 mA Input Supply Current (Note 6) VBIAS = 5V ● 0.9 1.4 mA Output Supply Current (Note 6) VBIAS = 5V ● 3.2 4.0 mA Shutdown Supply Current VSHDN = 0V, VIN ≤ 25V, VSW = 0V, VC Open 15 50 µA ● 75 µA VSHDN = 0V, VIN ≤ 30V, VSW = 0V, VC Open (LT1375HV/LT1376HV) 20 75 µA ● 100 µA Lockout Threshold VC Open ● 2.3 2.38 2.46 V 13756fd 3