Datasheet LT1738 (Analog Devices) - 2
| Hersteller | Analog Devices |
| Beschreibung | Slew Rate Controlled Ultralow Noise DC/DC Controller |
| Seiten / Seite | 20 / 2 — ABSOLUTE AXI U. RATI GS. PACKAGE/ORDER I FOR ATIO. (Note 1). ELECTRICAL … |
| Dateiformat / Größe | PDF / 260 Kb |
| Dokumentensprache | Englisch |
ABSOLUTE AXI U. RATI GS. PACKAGE/ORDER I FOR ATIO. (Note 1). ELECTRICAL CHARACTERISTICS The
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LT1738
W W W U U W U ABSOLUTE AXI U RATI GS PACKAGE/ORDER I FOR ATIO (Note 1)
Supply Voltage (V TOP VIEW ORDER PART IN) .. 20V Gate Drive Current ... Internal Limit NUMBER GATE 1 20 PGND V5 Current ... Internal Limit CAP 2 19 NC SHDN Pin Voltage .. 20V GCL 3 18 NC LT1738EG Feedback Pin Voltage (Trans. 10ms) .. ±10V CS 4 17 VIN LT1738IG Feedback Pin Current .. 10mA V5 5 16 RVSL Negative Feedback Pin Voltage (Trans. 10ms) .. ±10V SYNC 6 15 RCSL CS Pin .. 5V C 7 14 T SHDN GCL Pin ... 16V R 8 13 T SS FB 9 12 V SS Pin .. 3V C NFB 10 11 GND Operating Junction Temperature Range (Note 3) .. – 40°C to 125°C G PACKAGE 20-LEAD PLASTIC SSOP Storage Temperature Range ... – 65°C to 150°C TJMAX = 150°C, θJA = 110°C/ W Lead Temperature (Soldering, 10 sec).. 300°C Consult LTC Marketing for parts specified with wider operating temperature ranges.
ELECTRICAL CHARACTERISTICS The
●
denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25
°
C. VIN = 12V, VC = 0.9V, VFB = VREF, RVSL, RCSL = 16.9k, RT = 16.9k and other pins open unless otherwise noted. SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS Error Amplifiers
VREF Reference Voltage Measured at Feedback Pin ● 1.235 1.250 1.265 V IFB Feedback Input Current VFB = VREF ● 250 1000 nA FBREG Reference Voltage Line Regulation 2.7V ≤ VIN ≤ 20V ● 0.012 0.03 %/V VNFR Negative Feedback Reference Voltage Measured at Negative Feedback Pin ● –2.56 – 2.50 –2.45 V with Feedback Pin Open INFR Negative Feedback Input Current VNFB = VNFR –37 – 25 µA NFBREG Negative Feedback Reference Voltage Line Regulation 2.7V ≤ VIN ≤ 20V ● 0.009 0.03 %/V gm Error Amplifier Transconductance ∆IC = ±50µA 1100 1500 2200 µmho ● 700 2500 µmho IESK Error Amp Sink Current VFB = VREF + 150mV, VC = 0.9V ● 120 200 350 µA IESRC Error Amp Source Current VFB = VREF – 150mV, VC = 0.9V ● 120 200 350 µA VCLH Error Amp Clamp Voltage High Clamp, VFB = 1V 1.27 V VCLL Error Amp Clamp Voltage Low Clamp, VFB = 1.5V 0.12 V AV Error Amplifier Voltage Gain 180 250 V/V FBOV FB Overvoltage Shutdown Outputs Drivers Disabled 1.47 V ISS Soft-Start Charge Current VSS = 1V 9.0 12 µA 1738fa 2
W W W U U W U ABSOLUTE AXI U RATI GS PACKAGE/ORDER I FOR ATIO (Note 1)
Supply Voltage (V TOP VIEW ORDER PART IN) .. 20V Gate Drive Current ... Internal Limit NUMBER GATE 1 20 PGND V5 Current ... Internal Limit CAP 2 19 NC SHDN Pin Voltage .. 20V GCL 3 18 NC LT1738EG Feedback Pin Voltage (Trans. 10ms) .. ±10V CS 4 17 VIN LT1738IG Feedback Pin Current .. 10mA V5 5 16 RVSL Negative Feedback Pin Voltage (Trans. 10ms) .. ±10V SYNC 6 15 RCSL CS Pin .. 5V C 7 14 T SHDN GCL Pin ... 16V R 8 13 T SS FB 9 12 V SS Pin .. 3V C NFB 10 11 GND Operating Junction Temperature Range (Note 3) .. – 40°C to 125°C G PACKAGE 20-LEAD PLASTIC SSOP Storage Temperature Range ... – 65°C to 150°C TJMAX = 150°C, θJA = 110°C/ W Lead Temperature (Soldering, 10 sec).. 300°C Consult LTC Marketing for parts specified with wider operating temperature ranges.
ELECTRICAL CHARACTERISTICS The
●
denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25
°
C. VIN = 12V, VC = 0.9V, VFB = VREF, RVSL, RCSL = 16.9k, RT = 16.9k and other pins open unless otherwise noted. SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS Error Amplifiers
VREF Reference Voltage Measured at Feedback Pin ● 1.235 1.250 1.265 V IFB Feedback Input Current VFB = VREF ● 250 1000 nA FBREG Reference Voltage Line Regulation 2.7V ≤ VIN ≤ 20V ● 0.012 0.03 %/V VNFR Negative Feedback Reference Voltage Measured at Negative Feedback Pin ● –2.56 – 2.50 –2.45 V with Feedback Pin Open INFR Negative Feedback Input Current VNFB = VNFR –37 – 25 µA NFBREG Negative Feedback Reference Voltage Line Regulation 2.7V ≤ VIN ≤ 20V ● 0.009 0.03 %/V gm Error Amplifier Transconductance ∆IC = ±50µA 1100 1500 2200 µmho ● 700 2500 µmho IESK Error Amp Sink Current VFB = VREF + 150mV, VC = 0.9V ● 120 200 350 µA IESRC Error Amp Source Current VFB = VREF – 150mV, VC = 0.9V ● 120 200 350 µA VCLH Error Amp Clamp Voltage High Clamp, VFB = 1V 1.27 V VCLL Error Amp Clamp Voltage Low Clamp, VFB = 1.5V 0.12 V AV Error Amplifier Voltage Gain 180 250 V/V FBOV FB Overvoltage Shutdown Outputs Drivers Disabled 1.47 V ISS Soft-Start Charge Current VSS = 1V 9.0 12 µA 1738fa 2