Datasheet LTC1265, LTC1265-3.3, LTC1265-5 (Analog Devices) - 2
| Hersteller | Analog Devices |
| Beschreibung | 1.2A, High Efficiency Step-Down DC/DC Converter |
| Seiten / Seite | 16 / 2 — ABSOLUTE AXI U RATI GS. PACKAGE/ORDER I FOR ATIO. (Voltages Refer to GND … |
| Dateiformat / Größe | PDF / 244 Kb |
| Dokumentensprache | Englisch |
ABSOLUTE AXI U RATI GS. PACKAGE/ORDER I FOR ATIO. (Voltages Refer to GND Pin) (Note 1). ELECTRICAL CHARACTERISTICS The
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LTC1265/LTC1265-3.3/LTC1265-5
W W W U U W U ABSOLUTE AXI U RATI GS PACKAGE/ORDER I FOR ATIO (Voltages Refer to GND Pin) (Note 1)
Input Supply Voltage (Pins 1, 2, 13) ..– 0.3V to 13V TOP VIEW ORDER PART NUMBER DC Switch Current (Pin 14) .. 1.2A PWR V 1 14 IN SW Peak Switch Current (Pin 14) ... 1.6A V 2 13 IN PWR VIN LTC1265CS Switch Voltage (Pin 14) .. V LB 3 12 PGND IN – 13.0 OUT LTC1265CS-5 Operating Temperature Range LB 4 11 IN SGND LTC1265CS-3.3 LTC1265C ... 0° to 70°C C 5 10 T SHDN LTC1265IS LTC1265I .. – 40°C to 85°C I 6 9 TH N/C (VFB*) Junction Temperature (Note 2) ... 125°C SENSE– 7 8 SENSE+ Storage Temperature Range ..– 65° to 150°C S PACKAGE 14-LEAD PLASTIC SO Lead Temperature (Soldering, 10 sec).. 300°C *ADJUSTABLE OUTPUT VERSION TJMAX = 125°C, θJA = 110°C/W Consult factory for Military grade parts.
ELECTRICAL CHARACTERISTICS The
●
denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25
°
C. VIN = 10V, VSHDN = 0V, unless otherwise specified. SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
IFB Feedback Current into Pin 9 LTC1265 0.2 1 µA VFB Feedback Voltage LTC1265C ● 1.22 1.25 1.28 V VIN = 9V, LTC1265I ● 1.20 1.25 1.30 V VOUT Regulator Output Voltage LTC1265-3.3: ILOAD = 800mA ● 3.22 3.3 3.40 V LTC1265-5: ILOAD = 800mA ● 4.9 5 5.2 V ∆VOUT Output Voltage Line Regulation VIN = 6.5V to 10V, ILOAD = 800mA –40 0 40 mV Output Voltage Load Regulation LTC1265-3.3: 10mA < ILOAD < 800mA 40 65 mV LTC1265-5: 10mA < ILOAD < 800mA 60 100 mV Burst Mode Operation Output Ripple ILOAD = 0mA 50 mVP-P IQ Input DC Supply Current (Note 3) Active Mode: 3.5V < VIN < 10V 1.8 2.4 mA Sleep Mode: 3.5V < VIN < 10V 160 230 µA Sleep Mode: 5V < VIN < 10V (LTC1265-5) 160 230 µA Shutdown: VSHDN = VIN, 3.5V < VIN < 10V 5 15 µA VLBTRIP Low-Battery Trip Point 1.15 1.25 1.35 V ILBIN Current into Pin 4 0.5 µA ILBOUT Current Sunk by Pin 3 VLBOUT = 0.4V, VLBIN = 0V 0.5 1.0 1.5 mA VLBOUT = 5V, VLBIN = 10V 1.0 µA V – 8 – V7 Current Sense Threshold Voltage LTC1265: VSENSE = 5V, V9 = VOUT/4 + 25mV (Forced) 25 mV V – SENSE = 5V, V9 = VOUT/4 – 25mV (Forced) 130 150 180 mV LTC1265-3.3: V – SENSE = VOUT + 100mV (Forced) 25 mV V – SENSE = VOUT – 100mV (Forced) 130 150 180 mV LTC1265-5: V – SENSE = VOUT + 100mV (Forced) 25 mV V – SENSE = VOUT – 100mV (Forced) 130 150 180 mV RON ON Resistance of Switch LTC1265C ● 0.3 0.60 Ω LTC1265I 0.3 0.70 Ω I – 5 CT Pin Discharge Current VOUT in Regulation, VSENSE = VOUT 40 60 100 µA VOUT = 0V 2 10 µA tOFF Switch Off Time (Note 4) CT = 390pF, ILOAD = 800mA (LTC1265C) ● 4 5 6 µs CT = 390pF, ILOAD = 800mA (LTC1265I) ● 3.5 5 7 µs 2
W W W U U W U ABSOLUTE AXI U RATI GS PACKAGE/ORDER I FOR ATIO (Voltages Refer to GND Pin) (Note 1)
Input Supply Voltage (Pins 1, 2, 13) ..– 0.3V to 13V TOP VIEW ORDER PART NUMBER DC Switch Current (Pin 14) .. 1.2A PWR V 1 14 IN SW Peak Switch Current (Pin 14) ... 1.6A V 2 13 IN PWR VIN LTC1265CS Switch Voltage (Pin 14) .. V LB 3 12 PGND IN – 13.0 OUT LTC1265CS-5 Operating Temperature Range LB 4 11 IN SGND LTC1265CS-3.3 LTC1265C ... 0° to 70°C C 5 10 T SHDN LTC1265IS LTC1265I .. – 40°C to 85°C I 6 9 TH N/C (VFB*) Junction Temperature (Note 2) ... 125°C SENSE– 7 8 SENSE+ Storage Temperature Range ..– 65° to 150°C S PACKAGE 14-LEAD PLASTIC SO Lead Temperature (Soldering, 10 sec).. 300°C *ADJUSTABLE OUTPUT VERSION TJMAX = 125°C, θJA = 110°C/W Consult factory for Military grade parts.
ELECTRICAL CHARACTERISTICS The
●
denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25
°
C. VIN = 10V, VSHDN = 0V, unless otherwise specified. SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
IFB Feedback Current into Pin 9 LTC1265 0.2 1 µA VFB Feedback Voltage LTC1265C ● 1.22 1.25 1.28 V VIN = 9V, LTC1265I ● 1.20 1.25 1.30 V VOUT Regulator Output Voltage LTC1265-3.3: ILOAD = 800mA ● 3.22 3.3 3.40 V LTC1265-5: ILOAD = 800mA ● 4.9 5 5.2 V ∆VOUT Output Voltage Line Regulation VIN = 6.5V to 10V, ILOAD = 800mA –40 0 40 mV Output Voltage Load Regulation LTC1265-3.3: 10mA < ILOAD < 800mA 40 65 mV LTC1265-5: 10mA < ILOAD < 800mA 60 100 mV Burst Mode Operation Output Ripple ILOAD = 0mA 50 mVP-P IQ Input DC Supply Current (Note 3) Active Mode: 3.5V < VIN < 10V 1.8 2.4 mA Sleep Mode: 3.5V < VIN < 10V 160 230 µA Sleep Mode: 5V < VIN < 10V (LTC1265-5) 160 230 µA Shutdown: VSHDN = VIN, 3.5V < VIN < 10V 5 15 µA VLBTRIP Low-Battery Trip Point 1.15 1.25 1.35 V ILBIN Current into Pin 4 0.5 µA ILBOUT Current Sunk by Pin 3 VLBOUT = 0.4V, VLBIN = 0V 0.5 1.0 1.5 mA VLBOUT = 5V, VLBIN = 10V 1.0 µA V – 8 – V7 Current Sense Threshold Voltage LTC1265: VSENSE = 5V, V9 = VOUT/4 + 25mV (Forced) 25 mV V – SENSE = 5V, V9 = VOUT/4 – 25mV (Forced) 130 150 180 mV LTC1265-3.3: V – SENSE = VOUT + 100mV (Forced) 25 mV V – SENSE = VOUT – 100mV (Forced) 130 150 180 mV LTC1265-5: V – SENSE = VOUT + 100mV (Forced) 25 mV V – SENSE = VOUT – 100mV (Forced) 130 150 180 mV RON ON Resistance of Switch LTC1265C ● 0.3 0.60 Ω LTC1265I 0.3 0.70 Ω I – 5 CT Pin Discharge Current VOUT in Regulation, VSENSE = VOUT 40 60 100 µA VOUT = 0V 2 10 µA tOFF Switch Off Time (Note 4) CT = 390pF, ILOAD = 800mA (LTC1265C) ● 4 5 6 µs CT = 390pF, ILOAD = 800mA (LTC1265I) ● 3.5 5 7 µs 2