Datasheet LT1976, LT1976B (Analog Devices) - 2
| Manufacturer | Analog Devices |
| Description | High Voltage 1.5A, 200kHz Step-Down Switching Regulator with 100µA Quiescent Current |
| Pages / Page | 28 / 2 — ABSOLUTE AXI U. RATI GS. PACKAGE/ORDER I FOR ATIO. (Note 1). Order … |
| File Format / Size | PDF / 314 Kb |
| Document Language | English |
ABSOLUTE AXI U. RATI GS. PACKAGE/ORDER I FOR ATIO. (Note 1). Order Options. ELECTRICAL CHARACTERISTICS The
Model Line for this Datasheet
Text Version of Document
LT1976/LT1976B
W W W U U W U ABSOLUTE AXI U RATI GS PACKAGE/ORDER I FOR ATIO (Note 1)
VIN, SHDN, PG, BIAS .. 60V ORDER PART BOOST Pin Above SW .. 35V TOP VIEW NUMBER BOOST Pin Voltage ... 68V NC 1 16 PG LT1976EFE SYNC, C SW 2 15 SHDN SS, PGFB, FB .. 6V LT1976IFE Operating JunctionTemperature Range NC 3 14 SYNC LT1976HFE LT1976EFE/LT1976BEFE (Note 2) ... – 40°C to 125°C V 4 13 IN PGFB 17 NC 5 12 FB LT1976BEFE LT1976IFE/LT1976BIFE (Note 2) ... – 40°C to 125°C BOOST 6 11 V LT1976BIFE LT1976HFE (Note 2) .. – 40°C to 140°C C C 7 10 T BIAS Storage Temperature Range ... – 65°C to 150°C FE PART MARKING GND 8 9 CSS Lead Temperature (Soldering, 10 sec).. 300°C 1976EFE FE PACKAGE 1976IFE 16-LEAD PLASTIC TSSOP θJA = 45°C/W, θJC(PAD) = 10°C/W 1976HFE EXPOSED PAD IS GND (PIN 17) 1976BEFE MUST BE SOLDERED TO GND (PIN 8) 1976BIFE
Order Options
Tape and Reel: Add #TR Lead Free: Add #PBF Lead Free Tape and Reel: Add #TRPBF Lead Free Part Marking: http://www.linear.com/leadfree/ Consult LTC Marketing for parts specified with wider operating temperature ranges.
ELECTRICAL CHARACTERISTICS The
●
denotes the specifications which apply over the full –40
°
C to 125
°
C operating temperature range, otherwise specifications are at TJ = 25
°
C. VIN = 12V, SHDN = 12V, BOOST = 15.3V, BIAS = 5V, FB/PGFB = 1.25V, CSS/SYNC = 0V unless otherwise noted. SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
VSHDN SHDN Threshold ● 1.2 1.3 1.4 V ISHDN SHDN Input Current SHDN = 12V ● 5 20 μA Minimum Input Voltage (Note 3) ● 2.4 3 V IVINS Supply Shutdown Current SHDN = 0V, BOOST = 0V, FB/PGFB = 0V 0.1 2 μA Supply Sleep Current (Note 4) (LT1976) BIAS = 0V, FB = 1.35V ● 170 230 μA FB = 1.35V ● 45 75 μA IVIN Supply Quiescent Current BIAS = 0V, FB = 1.15V, VC = 0.8V (VC = 0V LT1976B) 3.2 4.10 mA BIAS = 5V, FB = 1.15V, VC = 0.8V (VC = 0V LT1976B) 2.6 3.25 mA Minimum BIAS Voltage (Note 5) ● 2.7 3 V IBIASS BIAS Sleep Current (Note 4) (LT1976) ● 110 180 μA IBIAS BIAS Quiescent Current SYNC = 3.3V 700 800 μA Minimum Boost Voltage (Note 6) ISW = 1.5A 1.8 2.5 V Input Boost Current (Note 7) ISW = 1.5A 40 50 mA VREF Reference Voltage (VREF) 3.3V < VVIN < 60V ● 1.225 1.25 1.275 V IFB FB Input Bias Current 75 200 nA EA Voltage Gain (Note 8) 900 V/V EA Voltage gm dI(VC)= ±10μA 400 650 800 μMho EA Source Current FB = 1.15V 20 40 55 μA EA Sink Current FB = 1.35V 15 30 40 μA VC to SW gm 3 A/V VC High Clamp 2.1 2.2 2.4 V VC Switching Threshold (LT1976B) ● 0.1 0.4 0.8 V 1976bfg 2
W W W U U W U ABSOLUTE AXI U RATI GS PACKAGE/ORDER I FOR ATIO (Note 1)
VIN, SHDN, PG, BIAS .. 60V ORDER PART BOOST Pin Above SW .. 35V TOP VIEW NUMBER BOOST Pin Voltage ... 68V NC 1 16 PG LT1976EFE SYNC, C SW 2 15 SHDN SS, PGFB, FB .. 6V LT1976IFE Operating JunctionTemperature Range NC 3 14 SYNC LT1976HFE LT1976EFE/LT1976BEFE (Note 2) ... – 40°C to 125°C V 4 13 IN PGFB 17 NC 5 12 FB LT1976BEFE LT1976IFE/LT1976BIFE (Note 2) ... – 40°C to 125°C BOOST 6 11 V LT1976BIFE LT1976HFE (Note 2) .. – 40°C to 140°C C C 7 10 T BIAS Storage Temperature Range ... – 65°C to 150°C FE PART MARKING GND 8 9 CSS Lead Temperature (Soldering, 10 sec).. 300°C 1976EFE FE PACKAGE 1976IFE 16-LEAD PLASTIC TSSOP θJA = 45°C/W, θJC(PAD) = 10°C/W 1976HFE EXPOSED PAD IS GND (PIN 17) 1976BEFE MUST BE SOLDERED TO GND (PIN 8) 1976BIFE
Order Options
Tape and Reel: Add #TR Lead Free: Add #PBF Lead Free Tape and Reel: Add #TRPBF Lead Free Part Marking: http://www.linear.com/leadfree/ Consult LTC Marketing for parts specified with wider operating temperature ranges.
ELECTRICAL CHARACTERISTICS The
●
denotes the specifications which apply over the full –40
°
C to 125
°
C operating temperature range, otherwise specifications are at TJ = 25
°
C. VIN = 12V, SHDN = 12V, BOOST = 15.3V, BIAS = 5V, FB/PGFB = 1.25V, CSS/SYNC = 0V unless otherwise noted. SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
VSHDN SHDN Threshold ● 1.2 1.3 1.4 V ISHDN SHDN Input Current SHDN = 12V ● 5 20 μA Minimum Input Voltage (Note 3) ● 2.4 3 V IVINS Supply Shutdown Current SHDN = 0V, BOOST = 0V, FB/PGFB = 0V 0.1 2 μA Supply Sleep Current (Note 4) (LT1976) BIAS = 0V, FB = 1.35V ● 170 230 μA FB = 1.35V ● 45 75 μA IVIN Supply Quiescent Current BIAS = 0V, FB = 1.15V, VC = 0.8V (VC = 0V LT1976B) 3.2 4.10 mA BIAS = 5V, FB = 1.15V, VC = 0.8V (VC = 0V LT1976B) 2.6 3.25 mA Minimum BIAS Voltage (Note 5) ● 2.7 3 V IBIASS BIAS Sleep Current (Note 4) (LT1976) ● 110 180 μA IBIAS BIAS Quiescent Current SYNC = 3.3V 700 800 μA Minimum Boost Voltage (Note 6) ISW = 1.5A 1.8 2.5 V Input Boost Current (Note 7) ISW = 1.5A 40 50 mA VREF Reference Voltage (VREF) 3.3V < VVIN < 60V ● 1.225 1.25 1.275 V IFB FB Input Bias Current 75 200 nA EA Voltage Gain (Note 8) 900 V/V EA Voltage gm dI(VC)= ±10μA 400 650 800 μMho EA Source Current FB = 1.15V 20 40 55 μA EA Sink Current FB = 1.35V 15 30 40 μA VC to SW gm 3 A/V VC High Clamp 2.1 2.2 2.4 V VC Switching Threshold (LT1976B) ● 0.1 0.4 0.8 V 1976bfg 2
