Datasheet LT1575, LT1577 (Analog Devices) - 3
| Manufacturer | Analog Devices |
| Description | Ultrafast Transient Response, Low Dropout Regulators Adjustable and Fixed |
| Pages / Page | 20 / 3 — ELECTRICAL CHARACTERISTICS. TA = 25. C, VIN = 12V, GATE = 6V, IPOS = INEG … |
| File Format / Size | PDF / 320 Kb |
| Document Language | English |
ELECTRICAL CHARACTERISTICS. TA = 25. C, VIN = 12V, GATE = 6V, IPOS = INEG = 5V, SHDN = 0.75V unless otherwise noted. SYMBOL
Model Line for this Datasheet
- LT1575CN8#PBF LT1575CN8#PBF LT1575CN8-1.5#PBF LT1575CN8-1.5#PBF LT1575CN8-2.8#PBF LT1575CN8-2.8#PBF LT1575CN8-3.3#PBF LT1575CN8-3.3#PBF LT1575CN8-3.5#PBF LT1575CN8-3.5#PBF LT1575CN8-5#PBF LT1575CN8-5#PBF LT1575CS8#PBF LT1575CS8#PBF LT1575CS8#TRPBF LT1575CS8#TRPBF LT1575CS8-1.5#PBF LT1575CS8-1.5#PBF LT1575CS8-2.8#PBF LT1575CS8-2.8#PBF LT1575CS8-3.3#PBF LT1575CS8-3.3#PBF LT1575CS8-3.5#PBF LT1575CS8-3.5#PBF LT1575CS8-5#PBF LT1575CS8-5#PBF
Text Version of Document
LT1575/LT1577
ELECTRICAL CHARACTERISTICS TA = 25
°
C, VIN = 12V, GATE = 6V, IPOS = INEG = 5V, SHDN = 0.75V unless otherwise noted. SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
IQ Supply Current ● 5 12 19 mA VFB LT1575 Reference Voltage – 0.6 1.210 0.6 % ● – 1.0 1.210 1.0 % VOUT LT1575-1.5 Output Voltage – 0.6 1.500 0.6 % ● – 1.0 1.500 1.0 % LT1575-2.8 Output Voltage – 0.6 2.800 0.6 % ● – 1.0 2.800 1.0 % LT1575-3.3 Output Voltage – 0.6 3.300 0.6 % ● – 1.0 3.300 1.0 % LT1575-3.5 Output Voltage – 0.6 3.500 0.6 % ● – 1.0 3.500 1.0 % LT1575-5 Output Voltage – 0.6 5.000 0.6 % ● – 1.0 5.000 1.0 % Line Regulation 10V ≤ VIN ≤ 20V ● 0.01 0.03 %/V IFB FB Input Bias Current FB = VFB ● – 0.6 – 4.0 µA IOUT OUT Divider Current OUT = VOUT ● 0.5 1.0 1.5 mA AVOL LT1575 Large-Signal Voltage Gain VGATE = 3V to 10V ● 69 84 dB LT1575-1.5 Large-Signal Voltage Gain VGATE = 3V to 10V ● 67 82 dB LT1575-2.8 Large-Signal Voltage Gain VGATE = 3V to 10V ● 60 76 dB LT1575-3.3 Large-Signal Voltage Gain VGATE = 3V to 10V ● 60 75 dB LT1575-3.5 Large-Signal Voltage Gain VGATE = 3V to 10V ● 60 74 dB LT1575-5 Large-Signal Voltage Gain VGATE = 3V to 10V ● 56 71 dB VOL GATE Output Swing Low (Note 3) IGATE = 0mA ● 2.5 3.0 V VOH GATE Output Swing High IGATE = 0mA ● VIN – 1.6 VIN – 1 V IPOS + INEG Supply Current 3V ≤ IPOS ≤ 20V ● 0.3 0.625 1.0 mA Current Limit Threshold Voltage 42 50 58 mV ● 37 50 63 mV Current Limit Threshold Voltage 3V ≤ IPOS ≤ 20V ● – 0.20 – 0.50 %/V Line Regulation SHDN Sink Current Current Flows Into Pin ● 2.5 5.0 8.0 µA SHDN Source Current Current Flows Out of Pin ● – 8 – 15 – 23 µA SHDN Low Clamp Voltage ● 0.1 0.25 V SHDN High Clamp Voltage ● 1.50 1.85 2.20 V SHDN Threshold Voltage ● 1.18 1.21 1.240 V SHDN Threshold Hysteresis ● 50 100 150 mV The ● denotes specifications which apply over the full operating Because the LT1577 consists of two regulators in the package, the total temperature range. LT1577 power dissipation must be used for its junction temperature
Note 1:
Absolute Maximum Ratings are those values beyond which the life calculation. The total LT1577 PD = PD (Regulator 1) + PD (Regulator 2). of the device may be impaired.
Note 3:
The VGS(th) of the external MOSFET must be greater than
Note 2:
T 3V – V J is calculated from the ambient temperature TA and power OUT. dissipation PD according to the following formulas: LT1575CN8: TJ = TA + (PD • 100°CW) LT1575CS8: TJ = TA + (PD • 130°CW) LT1577CS: TJ = TA + (PD • 100°CW) 3
ELECTRICAL CHARACTERISTICS TA = 25
°
C, VIN = 12V, GATE = 6V, IPOS = INEG = 5V, SHDN = 0.75V unless otherwise noted. SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
IQ Supply Current ● 5 12 19 mA VFB LT1575 Reference Voltage – 0.6 1.210 0.6 % ● – 1.0 1.210 1.0 % VOUT LT1575-1.5 Output Voltage – 0.6 1.500 0.6 % ● – 1.0 1.500 1.0 % LT1575-2.8 Output Voltage – 0.6 2.800 0.6 % ● – 1.0 2.800 1.0 % LT1575-3.3 Output Voltage – 0.6 3.300 0.6 % ● – 1.0 3.300 1.0 % LT1575-3.5 Output Voltage – 0.6 3.500 0.6 % ● – 1.0 3.500 1.0 % LT1575-5 Output Voltage – 0.6 5.000 0.6 % ● – 1.0 5.000 1.0 % Line Regulation 10V ≤ VIN ≤ 20V ● 0.01 0.03 %/V IFB FB Input Bias Current FB = VFB ● – 0.6 – 4.0 µA IOUT OUT Divider Current OUT = VOUT ● 0.5 1.0 1.5 mA AVOL LT1575 Large-Signal Voltage Gain VGATE = 3V to 10V ● 69 84 dB LT1575-1.5 Large-Signal Voltage Gain VGATE = 3V to 10V ● 67 82 dB LT1575-2.8 Large-Signal Voltage Gain VGATE = 3V to 10V ● 60 76 dB LT1575-3.3 Large-Signal Voltage Gain VGATE = 3V to 10V ● 60 75 dB LT1575-3.5 Large-Signal Voltage Gain VGATE = 3V to 10V ● 60 74 dB LT1575-5 Large-Signal Voltage Gain VGATE = 3V to 10V ● 56 71 dB VOL GATE Output Swing Low (Note 3) IGATE = 0mA ● 2.5 3.0 V VOH GATE Output Swing High IGATE = 0mA ● VIN – 1.6 VIN – 1 V IPOS + INEG Supply Current 3V ≤ IPOS ≤ 20V ● 0.3 0.625 1.0 mA Current Limit Threshold Voltage 42 50 58 mV ● 37 50 63 mV Current Limit Threshold Voltage 3V ≤ IPOS ≤ 20V ● – 0.20 – 0.50 %/V Line Regulation SHDN Sink Current Current Flows Into Pin ● 2.5 5.0 8.0 µA SHDN Source Current Current Flows Out of Pin ● – 8 – 15 – 23 µA SHDN Low Clamp Voltage ● 0.1 0.25 V SHDN High Clamp Voltage ● 1.50 1.85 2.20 V SHDN Threshold Voltage ● 1.18 1.21 1.240 V SHDN Threshold Hysteresis ● 50 100 150 mV The ● denotes specifications which apply over the full operating Because the LT1577 consists of two regulators in the package, the total temperature range. LT1577 power dissipation must be used for its junction temperature
Note 1:
Absolute Maximum Ratings are those values beyond which the life calculation. The total LT1577 PD = PD (Regulator 1) + PD (Regulator 2). of the device may be impaired.
Note 3:
The VGS(th) of the external MOSFET must be greater than
Note 2:
T 3V – V J is calculated from the ambient temperature TA and power OUT. dissipation PD according to the following formulas: LT1575CN8: TJ = TA + (PD • 100°CW) LT1575CS8: TJ = TA + (PD • 130°CW) LT1577CS: TJ = TA + (PD • 100°CW) 3
