Datasheet LTC3408 (Analog Devices) - 2
| Hersteller | Analog Devices |
| Beschreibung | 1.5MHz, 600mA Synchronous Step-Down Regulator with Bypass Transistor |
| Seiten / Seite | 12 / 2 — ABSOLUTE AXI U RATI GS. PACKAGE/ORDER I FOR ATIO. (Note 1). ELECTRICAL … |
| Dateiformat / Größe | PDF / 165 Kb |
| Dokumentensprache | Englisch |
ABSOLUTE AXI U RATI GS. PACKAGE/ORDER I FOR ATIO. (Note 1). ELECTRICAL CHARACTERISTICS. The
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LTC3408
W W W U U W U ABSOLUTE AXI U RATI GS PACKAGE/ORDER I FOR ATIO (Note 1)
Input Supply Voltage (< 300µs) .. – 0.3V to 6V ORDER PART Input Supply Voltage (DC) ... – 0.3V to 5.5V TOP VIEW NUMBER RUN, REF, VOUT Voltages .. – 0.3V to VIN V 1 8 V OUT OUT SW Voltage (DC) ... – 0.3V to (V V 2 7 V LTC3408EDD IN + 0.3V) IN IN 9 P-Channel Switch Source Current (DC) ... 800mA GND 3 6 REF N-Channel Switch Sink Current (DC) ... 800mA SW 4 5 RUN Peak SW Sink and Source Current .. 1.3A DD PACKAGE DD PART MARKING Bypass P-Channel FET Source Current (DC) .. 1A 8-LEAD (3mm × 3mm) PLASTIC DFN EXPOSED PAD IS GND (PIN 9) Operating Temperature Range (Note 2) .. – 40°C to 85°C MUST BE SOLDERED TO PCB LAEA Junction Temperature (Note 3) .. 125°C TJMAX = 125°C, θJA = 43°C/ W, θJC = 3°C/ W Storage Temperature Range .. – 65°C to 125°C Consult LTC Marketing for parts specified with wider operating temperature ranges.
ELECTRICAL CHARACTERISTICS The
●
denotes specifications which apply over the full operating temperature range, otherwise specifications are TA = 25
°
C. VIN = 3.6V unless otherwise specified. SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
VOUT Regulated Output Voltage VREF = 1.1V ● 3.23 3.3 3.37 V VREF = 0.1V ● 0.25 0.3 0.35 V ∆VOUT Output Voltage Line Regulation VIN = 2.5V to 5V, VREF = 0.6V ● 0.1 0.4 %/V IPK Peak Inductor Current VIN = 3V, VREF = 0.9V 0.70 1 1.25 A VLOADREG Output Voltage Load Regulation 0.7 % VIN Input Voltage Range ● 2.5 5 V IS Input Current VRUN = 1.2V, SW = Open 1.5 2.5 mA Shutdown Current VRUN = 0V, SW = Open 0.1 1 µA fOSC Oscillator Frequency VREF ≥ 0.25V ● 1.2 1.5 1.8 MHz VREF ≤ 0.1V 550 700 850 kHz VREF Bypass PFET Turn-Off Threshold VREF = 1.167 1.2 V Bypass PFET Turn-On Threshold VREF = 1.21 1.26 V RPFET RDS(ON) of P-Channel FET ISW = 160mA, Wafer Level 0.3 0.4 Ω ISW = 160mA, DD Package 0.4 Ω RNFET RDS(ON) of N-Channel FET ISW = –160mA, Wafer Level 0.3 0.4 Ω ISW = –160mA, DD Package 0.4 Ω RBYPASS RDS(ON) of Bypass P-Channel FET IOUT = 100mA, VIN = 3V, Wafer Level 0.05 0.08 Ω IOUT = 100mA, VIN = 3V, DD Package (Note 4) 0.08 Ω ILSW SW Leakage VRUN = 0V, VSW = 0V or 5V, VIN = 5V ±0.01 ±1 µA ILBYP Bypass PFET Leakage VOUT = 0V, VIN = 5V, VREF = 0V ±0.01 ±1 µA VRUN RUN Threshold ● 0.3 1 1.5 V IRUN RUN Input Current VRUN = 0V or 2.5V ● ±0.01 ±1 µA IREF REF Input Current ● ±0.01 ±1 µA
Note 1:
Absolute Maximum Ratings are those values beyond which the life temperature range are assured by design, characterization and correlation of a device may be impaired. with statistical process controls.
Note 2:
The LTC3408E is guaranteed to meet performance specifications
Note 3:
TJ is calculated from the ambient temperature TA and power from 0°C to 70°C. Specifications over the –40°C to 85°C operating dissipation PD according to the following formula: LTC3408: TJ = TA + (PD)(43°C/W) 3408f 2
W W W U U W U ABSOLUTE AXI U RATI GS PACKAGE/ORDER I FOR ATIO (Note 1)
Input Supply Voltage (< 300µs) .. – 0.3V to 6V ORDER PART Input Supply Voltage (DC) ... – 0.3V to 5.5V TOP VIEW NUMBER RUN, REF, VOUT Voltages .. – 0.3V to VIN V 1 8 V OUT OUT SW Voltage (DC) ... – 0.3V to (V V 2 7 V LTC3408EDD IN + 0.3V) IN IN 9 P-Channel Switch Source Current (DC) ... 800mA GND 3 6 REF N-Channel Switch Sink Current (DC) ... 800mA SW 4 5 RUN Peak SW Sink and Source Current .. 1.3A DD PACKAGE DD PART MARKING Bypass P-Channel FET Source Current (DC) .. 1A 8-LEAD (3mm × 3mm) PLASTIC DFN EXPOSED PAD IS GND (PIN 9) Operating Temperature Range (Note 2) .. – 40°C to 85°C MUST BE SOLDERED TO PCB LAEA Junction Temperature (Note 3) .. 125°C TJMAX = 125°C, θJA = 43°C/ W, θJC = 3°C/ W Storage Temperature Range .. – 65°C to 125°C Consult LTC Marketing for parts specified with wider operating temperature ranges.
ELECTRICAL CHARACTERISTICS The
●
denotes specifications which apply over the full operating temperature range, otherwise specifications are TA = 25
°
C. VIN = 3.6V unless otherwise specified. SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
VOUT Regulated Output Voltage VREF = 1.1V ● 3.23 3.3 3.37 V VREF = 0.1V ● 0.25 0.3 0.35 V ∆VOUT Output Voltage Line Regulation VIN = 2.5V to 5V, VREF = 0.6V ● 0.1 0.4 %/V IPK Peak Inductor Current VIN = 3V, VREF = 0.9V 0.70 1 1.25 A VLOADREG Output Voltage Load Regulation 0.7 % VIN Input Voltage Range ● 2.5 5 V IS Input Current VRUN = 1.2V, SW = Open 1.5 2.5 mA Shutdown Current VRUN = 0V, SW = Open 0.1 1 µA fOSC Oscillator Frequency VREF ≥ 0.25V ● 1.2 1.5 1.8 MHz VREF ≤ 0.1V 550 700 850 kHz VREF Bypass PFET Turn-Off Threshold VREF = 1.167 1.2 V Bypass PFET Turn-On Threshold VREF = 1.21 1.26 V RPFET RDS(ON) of P-Channel FET ISW = 160mA, Wafer Level 0.3 0.4 Ω ISW = 160mA, DD Package 0.4 Ω RNFET RDS(ON) of N-Channel FET ISW = –160mA, Wafer Level 0.3 0.4 Ω ISW = –160mA, DD Package 0.4 Ω RBYPASS RDS(ON) of Bypass P-Channel FET IOUT = 100mA, VIN = 3V, Wafer Level 0.05 0.08 Ω IOUT = 100mA, VIN = 3V, DD Package (Note 4) 0.08 Ω ILSW SW Leakage VRUN = 0V, VSW = 0V or 5V, VIN = 5V ±0.01 ±1 µA ILBYP Bypass PFET Leakage VOUT = 0V, VIN = 5V, VREF = 0V ±0.01 ±1 µA VRUN RUN Threshold ● 0.3 1 1.5 V IRUN RUN Input Current VRUN = 0V or 2.5V ● ±0.01 ±1 µA IREF REF Input Current ● ±0.01 ±1 µA
Note 1:
Absolute Maximum Ratings are those values beyond which the life temperature range are assured by design, characterization and correlation of a device may be impaired. with statistical process controls.
Note 2:
The LTC3408E is guaranteed to meet performance specifications
Note 3:
TJ is calculated from the ambient temperature TA and power from 0°C to 70°C. Specifications over the –40°C to 85°C operating dissipation PD according to the following formula: LTC3408: TJ = TA + (PD)(43°C/W) 3408f 2