Datasheet LTC3445 (Analog Devices) - 4
| Manufacturer | Analog Devices |
| Description | I²C Controllable Buck Regulator with Two LDOs in a 4mm × 4mm QFN |
| Pages / Page | 24 / 4 — ELECTRICAL CHARACTERISTICS The. denotes the specifications which apply … |
| File Format / Size | PDF / 486 Kb |
| Document Language | English |
ELECTRICAL CHARACTERISTICS The. denotes the specifications which apply over the full operating
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LTC3445
ELECTRICAL CHARACTERISTICS The
●
denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25
°
C. VCC1 = VCC2 = 3.6V, unless otherwise noted. SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
tSU(RSTA) Repeated Start Condition Setup Time (Note 5) 600 ns tSU(STOP) Stop Condition Setup Time (Note 5) 600 ns tHD(DIN) Data Hold Time, Input (Note 5) 0 ns tSU(DAT) Data Setup Time (Note 5) 100 ns VTHR SCL and SDA Logic Input Threshold 1.8 V VHYS SCL and SDA Logic Input Hysteresis (Note 5) 50 mV ILVTRACK VTRACK Leakage VCC = 3.6V 1.44 2.2 µA ILVBACKUP VBACKUP Leakage VCC = 3.6V ● 1 µA ILADD7 ADD7 Leakage VCC = 3.6V ● 1 µA ILADD6 ADD6 Leakage VCC = 3.6V ● 1 µA ILSCL SCL Leakage VCC = 3.6V ● 1 µA ILSDA SCL Leakage VCC = 3.6V ● 1 µA ILLDO1 LDO1 Leakage VCC = 3.6V, RUN = 0 ● 1 µA ILLDO2 LDO2 Leakage VCC = 3.6V, RUN = 0 ● 1 µA ILLDO1FB LDO1FB Leakage VCC = 3.6V, RUN = 0 ● 1 µA ILLDO2FB LDO2FB Leakage VCC = 3.6V, RUN = 0 ● 1 µA ILBATTFAULT BATTFAULT Leakage VCC = 3.6V ● 1 µA IFB1,2 LDO Feedback Input Current VFB1 = 0.6V ● 1 µA
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 LTC3445EUF is guaranteed to meet performance specifica- TJ = TA + PD • 37°C/W tions from 0°C to 70°C. Specifications over the –40°C to 85°C operating
Note 4:
Dynamic supply current is higher due to the gate charge being temperature range are assured by design, characterization and correlation delivered at the switching frequency. with statistical process controls.
Note 5:
Determined by design, not production tested.
W U TYPICAL PERFOR A CE CHARACTERISTICS Supply Current vs Supply Voltage VOUT vs DAC VOUT Step Size vs DAC
500 1.6 0.016 0mA 1.5 600mA 0.014 100mA 400 ALL ON 0.012 1.4 µA) (V) 0.010 300 1.3 BUCK (V) 0.008 OUT(N–1) 1.2 OUTV – V 0.006 200 ONE LDO 1.1 TWO LDOs 0.004 OUT(N) SUPPLY CURRENT ( V 1.0 100 0.002 RUN = HIGH 0.9 0 RUN = LOW 0 0.8 –0.002 2.4 2.8 3.2 3.6 4 4.4 4.8 5.2 5.6 0 10 20 30 40 50 60 70 80 0 10 20 30 40 50 60 70 80 SUPPLY VOLTAGE (V) DAC VALUE DAC VALUE 3445 G01 3445 G02 3445 G03 3445fa 4
ELECTRICAL CHARACTERISTICS The
●
denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25
°
C. VCC1 = VCC2 = 3.6V, unless otherwise noted. SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
tSU(RSTA) Repeated Start Condition Setup Time (Note 5) 600 ns tSU(STOP) Stop Condition Setup Time (Note 5) 600 ns tHD(DIN) Data Hold Time, Input (Note 5) 0 ns tSU(DAT) Data Setup Time (Note 5) 100 ns VTHR SCL and SDA Logic Input Threshold 1.8 V VHYS SCL and SDA Logic Input Hysteresis (Note 5) 50 mV ILVTRACK VTRACK Leakage VCC = 3.6V 1.44 2.2 µA ILVBACKUP VBACKUP Leakage VCC = 3.6V ● 1 µA ILADD7 ADD7 Leakage VCC = 3.6V ● 1 µA ILADD6 ADD6 Leakage VCC = 3.6V ● 1 µA ILSCL SCL Leakage VCC = 3.6V ● 1 µA ILSDA SCL Leakage VCC = 3.6V ● 1 µA ILLDO1 LDO1 Leakage VCC = 3.6V, RUN = 0 ● 1 µA ILLDO2 LDO2 Leakage VCC = 3.6V, RUN = 0 ● 1 µA ILLDO1FB LDO1FB Leakage VCC = 3.6V, RUN = 0 ● 1 µA ILLDO2FB LDO2FB Leakage VCC = 3.6V, RUN = 0 ● 1 µA ILBATTFAULT BATTFAULT Leakage VCC = 3.6V ● 1 µA IFB1,2 LDO Feedback Input Current VFB1 = 0.6V ● 1 µA
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 LTC3445EUF is guaranteed to meet performance specifica- TJ = TA + PD • 37°C/W tions from 0°C to 70°C. Specifications over the –40°C to 85°C operating
Note 4:
Dynamic supply current is higher due to the gate charge being temperature range are assured by design, characterization and correlation delivered at the switching frequency. with statistical process controls.
Note 5:
Determined by design, not production tested.
W U TYPICAL PERFOR A CE CHARACTERISTICS Supply Current vs Supply Voltage VOUT vs DAC VOUT Step Size vs DAC
500 1.6 0.016 0mA 1.5 600mA 0.014 100mA 400 ALL ON 0.012 1.4 µA) (V) 0.010 300 1.3 BUCK (V) 0.008 OUT(N–1) 1.2 OUTV – V 0.006 200 ONE LDO 1.1 TWO LDOs 0.004 OUT(N) SUPPLY CURRENT ( V 1.0 100 0.002 RUN = HIGH 0.9 0 RUN = LOW 0 0.8 –0.002 2.4 2.8 3.2 3.6 4 4.4 4.8 5.2 5.6 0 10 20 30 40 50 60 70 80 0 10 20 30 40 50 60 70 80 SUPPLY VOLTAGE (V) DAC VALUE DAC VALUE 3445 G01 3445 G02 3445 G03 3445fa 4
