Datasheet LTC3406A (Analog Devices) - 3
| 制造商 | Analog Devices |
| 描述 | 1.5MHz, 600mA Synchronous Step-Down Regulator in ThinSOT |
| 页数 / 页 | 16 / 3 — ELECTRICAL CHARACTERISTICS. The. denotes the specifi cations which apply … |
| 文件格式/大小 | PDF / 305 Kb |
| 文件语言 | 英语 |
ELECTRICAL CHARACTERISTICS. The. denotes the specifi cations which apply over the full operating
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LTC3406A
ELECTRICAL CHARACTERISTICS The
●
denotes the specifi cations which apply over the full operating temperature range, otherwise specifi cations are at TA = 25°C. VIN = 3.6V unless otherwise specifi ed. SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
RNFET RDS(ON) of N-Channel FET ISW = –100mA 0.21 0.35 Ω ILSW SW Leakage VRUN = 0V, VSW = 0V or 5V, VIN = 5V ±0.01 ±1 μA tSOFT-START Soft-Start Time VFB from 10% to 90% Full-Scale 0.6 0.9 1.2 ms VRUN RUN Threshold ● 0.3 1 1.5 V IRUN RUN Leakage Current ● ±0.01 ±1 μA
Note 1:
Stresses beyond those listed under Absolute Maximum Ratings
Note 4:
The LTC3406A is tested in a proprietary test mode that connects may cause permanent damage to the device. Exposure to any Absolute VFB to the output of the error amplifi er. Maximum Rating condition for extended periods may affect device
Note 5:
Dynamic supply current is higher due to the gate charge being reliability and lifetime. delivered at the switching frequency.
Note 2:
The LTC3406AE is guaranteed to meet performance specifi cations
Note 6:
This IC includes overtemperature protection that is intended from 0°C to 85°C. Specifi cations over the –40°C to 85°C operating to protect the device during momentary overload conditions. Junction temperature range are assured by design, characterization and correlation temperature will exceed 125°C when overtemperature protection is active. with statistical process controls. The LTC3406AI is guaranteed to meet the Continuous operation above the specifi ed maximum operating junction specifi ed performance over the full –40°C to 125°C operating temperature temperature may impair device reliability. range.
Note 7:
Limited by long term current density considerations.
Note 3:
TJ is calculated from the ambient temperature TA and power dissipation PD according to the following formula: LTC3406A: TJ = TA + (PD)(250°C/W)
TYPICAL PERFORMANCE CHARACTERISTICS (From Front Page Figure Except for the Resistive Divider Resistor Values) Effi ciency vs Input Voltage Effi ciency vs Load Current Effi ciency vs Load Current
100 100 100 90 90 90 80 80 80 70 70 70 60 60 60 50 50 50 40 40 40 EFFICIENCY (%) EFFICIENCY (%) EFFICIENCY (%) 30 30 30 20 I 20 20 L = 10mA VIN = 2.7V VIN = 2.7V 10 IL = 100mA 10 VIN = 3.6V 10 VIN = 3.6V V I OUT = 1.8V L = 600mA V V OUT = 1.2V IN = 4.2V V V OUT = 2.5V IN = 4.2V 0 0 0 2 3 4 5 6 0.1 1 10 100 1000 0.1 1 10 100 1000 INPUT VOLTAGE (V) OUTPUT CURRENT (mA) OUTPUT CURRENT (mA) 3406A G01 3406A G02 3406A G03 3406afa 3
ELECTRICAL CHARACTERISTICS The
●
denotes the specifi cations which apply over the full operating temperature range, otherwise specifi cations are at TA = 25°C. VIN = 3.6V unless otherwise specifi ed. SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
RNFET RDS(ON) of N-Channel FET ISW = –100mA 0.21 0.35 Ω ILSW SW Leakage VRUN = 0V, VSW = 0V or 5V, VIN = 5V ±0.01 ±1 μA tSOFT-START Soft-Start Time VFB from 10% to 90% Full-Scale 0.6 0.9 1.2 ms VRUN RUN Threshold ● 0.3 1 1.5 V IRUN RUN Leakage Current ● ±0.01 ±1 μA
Note 1:
Stresses beyond those listed under Absolute Maximum Ratings
Note 4:
The LTC3406A is tested in a proprietary test mode that connects may cause permanent damage to the device. Exposure to any Absolute VFB to the output of the error amplifi er. Maximum Rating condition for extended periods may affect device
Note 5:
Dynamic supply current is higher due to the gate charge being reliability and lifetime. delivered at the switching frequency.
Note 2:
The LTC3406AE is guaranteed to meet performance specifi cations
Note 6:
This IC includes overtemperature protection that is intended from 0°C to 85°C. Specifi cations over the –40°C to 85°C operating to protect the device during momentary overload conditions. Junction temperature range are assured by design, characterization and correlation temperature will exceed 125°C when overtemperature protection is active. with statistical process controls. The LTC3406AI is guaranteed to meet the Continuous operation above the specifi ed maximum operating junction specifi ed performance over the full –40°C to 125°C operating temperature temperature may impair device reliability. range.
Note 7:
Limited by long term current density considerations.
Note 3:
TJ is calculated from the ambient temperature TA and power dissipation PD according to the following formula: LTC3406A: TJ = TA + (PD)(250°C/W)
TYPICAL PERFORMANCE CHARACTERISTICS (From Front Page Figure Except for the Resistive Divider Resistor Values) Effi ciency vs Input Voltage Effi ciency vs Load Current Effi ciency vs Load Current
100 100 100 90 90 90 80 80 80 70 70 70 60 60 60 50 50 50 40 40 40 EFFICIENCY (%) EFFICIENCY (%) EFFICIENCY (%) 30 30 30 20 I 20 20 L = 10mA VIN = 2.7V VIN = 2.7V 10 IL = 100mA 10 VIN = 3.6V 10 VIN = 3.6V V I OUT = 1.8V L = 600mA V V OUT = 1.2V IN = 4.2V V V OUT = 2.5V IN = 4.2V 0 0 0 2 3 4 5 6 0.1 1 10 100 1000 0.1 1 10 100 1000 INPUT VOLTAGE (V) OUTPUT CURRENT (mA) OUTPUT CURRENT (mA) 3406A G01 3406A G02 3406A G03 3406afa 3