Datasheet LTC3405A (Analog Devices) - 2
| 制造商 | Analog Devices |
| 描述 | 1.5MHz, 300mA Synchronous Step-Down Regulator in ThinSOT |
| 页数 / 页 | 16 / 2 — ABSOLUTE AXI U RATI GS. PACKAGE/ORDER I FOR ATIO. (Note 1). ELECTRICAL … |
| 文件格式/大小 | PDF / 219 Kb |
| 文件语言 | 英语 |
ABSOLUTE AXI U RATI GS. PACKAGE/ORDER I FOR ATIO. (Note 1). ELECTRICAL CHARACTERISTICS. The
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LTC3405A
W W W U U W U ABSOLUTE AXI U RATI GS PACKAGE/ORDER I FOR ATIO (Note 1)
Input Supply Voltage .. – 0.3V to 6V ORDER PART MODE, RUN, VFB Voltages ... – 0.3V to VIN TOP VIEW NUMBER SW Voltage .. – 0.3V to (VIN + 0.3V) RUN 1 6 MODE GND 2 5 V LTC3405AES6 P-Channel Switch Source Current (DC) ... 400mA FB N-Channel Switch Sink Current (DC) ... 400mA SW 3 4 VIN Peak SW Sink and Source Current .. 630mA S6 PACKAGE S6 PART MARKING Operating Temperature Range (Note 2) .. – 40°C to 85°C 6-LEAD PLASTIC TSOT-23 TJMAX = 125°C, θJA = 250°C/ W Junction Temperature (Note 3) .. 125°C LTZW Storage Temperature Range .. – 65°C to 150°C Lead Temperature (Soldering, 10 sec)... 300°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
IVFB Feedback Current ● ±30 nA IPK Peak Inductor Current VIN = 3V, VFB = 0.7V, Duty Cycle < 35% 375 500 625 mA VFB Regulated Feedback Voltage (Note 4) ● 0.784 0.8 0.816 V ∆VOVL ∆Output Overvoltage Lockout ∆VOVL = VOVL – VFB ● 20 50 80 mV ∆VFB Reference Voltage Line Regulation VIN = 2.5V to 5.5V (Note 4) ● 0.04 0.4 %/V VLOADREG Output Voltage Load Regulation 0.5 % VIN Input Voltage Range ● 2.5 5.5 V IS Input DC Bias Current (Note 5) Pulse Skipping Mode VFB = 0.7V, Mode = 3.6V, ILOAD = 0A 300 400 µA Burst Mode® Operation VFB = 0.83V, Mode = 0V, ILOAD = 0A 20 35 µA Shutdown VRUN = 0V, VIN = 4.2V 0.1 1 µA fOSC Oscillator Frequency VFB = 0.8V ● 1.2 1.5 1.8 MHz VFB = 0V 210 kHz RPFET RDS(ON) of P-Channel FET ISW = 100mA 0.7 0.85 Ω RNFET RDS(ON) of N-Channel FET ISW = –100mA 0.6 0.90 Ω ILSW SW Leakage VRUN = 0V, VSW = 0V or 5V, VIN = 5V ±0.01 ±1 µA VRUN RUN Threshold ● 0.3 1 1.5 V IRUN RUN Leakage Current ● ±0.01 ±1 µA VMODE MODE Threshold ● 0.3 1.5 2 V IMODE MODE Leakage Current ● ±0.01 ±1 µA Burst Mode is a registered trademark of Linear Technology Corporation.
Note 1:
Absolute Maximum Ratings are those values beyond which the life
Note 3:
TJ is calculated from the ambient temperature TA and power of a device may be impaired. dissipation PD according to the following formula:
Note 2:
The LTC3405AE is guaranteed to meet performance specifications LTC3405A: TJ = TA + (PD)(250°C/W) from 0°C to 70°C. Specifications over the –40°C to 85°C operating
Note 4:
The LTC3405A is tested in a proprietary test mode that connects temperature range are assured by design, characterization and correlation VFB to the output of the error amplifier. with statistical process controls.
Note 5:
Dynamic supply current is higher due to the gate charge being delivered at the switching frequency. 3405afa 2
W W W U U W U ABSOLUTE AXI U RATI GS PACKAGE/ORDER I FOR ATIO (Note 1)
Input Supply Voltage .. – 0.3V to 6V ORDER PART MODE, RUN, VFB Voltages ... – 0.3V to VIN TOP VIEW NUMBER SW Voltage .. – 0.3V to (VIN + 0.3V) RUN 1 6 MODE GND 2 5 V LTC3405AES6 P-Channel Switch Source Current (DC) ... 400mA FB N-Channel Switch Sink Current (DC) ... 400mA SW 3 4 VIN Peak SW Sink and Source Current .. 630mA S6 PACKAGE S6 PART MARKING Operating Temperature Range (Note 2) .. – 40°C to 85°C 6-LEAD PLASTIC TSOT-23 TJMAX = 125°C, θJA = 250°C/ W Junction Temperature (Note 3) .. 125°C LTZW Storage Temperature Range .. – 65°C to 150°C Lead Temperature (Soldering, 10 sec)... 300°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
IVFB Feedback Current ● ±30 nA IPK Peak Inductor Current VIN = 3V, VFB = 0.7V, Duty Cycle < 35% 375 500 625 mA VFB Regulated Feedback Voltage (Note 4) ● 0.784 0.8 0.816 V ∆VOVL ∆Output Overvoltage Lockout ∆VOVL = VOVL – VFB ● 20 50 80 mV ∆VFB Reference Voltage Line Regulation VIN = 2.5V to 5.5V (Note 4) ● 0.04 0.4 %/V VLOADREG Output Voltage Load Regulation 0.5 % VIN Input Voltage Range ● 2.5 5.5 V IS Input DC Bias Current (Note 5) Pulse Skipping Mode VFB = 0.7V, Mode = 3.6V, ILOAD = 0A 300 400 µA Burst Mode® Operation VFB = 0.83V, Mode = 0V, ILOAD = 0A 20 35 µA Shutdown VRUN = 0V, VIN = 4.2V 0.1 1 µA fOSC Oscillator Frequency VFB = 0.8V ● 1.2 1.5 1.8 MHz VFB = 0V 210 kHz RPFET RDS(ON) of P-Channel FET ISW = 100mA 0.7 0.85 Ω RNFET RDS(ON) of N-Channel FET ISW = –100mA 0.6 0.90 Ω ILSW SW Leakage VRUN = 0V, VSW = 0V or 5V, VIN = 5V ±0.01 ±1 µA VRUN RUN Threshold ● 0.3 1 1.5 V IRUN RUN Leakage Current ● ±0.01 ±1 µA VMODE MODE Threshold ● 0.3 1.5 2 V IMODE MODE Leakage Current ● ±0.01 ±1 µA Burst Mode is a registered trademark of Linear Technology Corporation.
Note 1:
Absolute Maximum Ratings are those values beyond which the life
Note 3:
TJ is calculated from the ambient temperature TA and power of a device may be impaired. dissipation PD according to the following formula:
Note 2:
The LTC3405AE is guaranteed to meet performance specifications LTC3405A: TJ = TA + (PD)(250°C/W) from 0°C to 70°C. Specifications over the –40°C to 85°C operating
Note 4:
The LTC3405A is tested in a proprietary test mode that connects temperature range are assured by design, characterization and correlation VFB to the output of the error amplifier. with statistical process controls.
Note 5:
Dynamic supply current is higher due to the gate charge being delivered at the switching frequency. 3405afa 2