Datasheet LTC1980 (Analog Devices) - 4
| Manufacturer | Analog Devices |
| Description | Combination Battery Charger and DC/DC Converter |
| Pages / Page | 16 / 4 — ELECTRICAL CHARACTERISTICS The. denotes the specifications which apply … |
| File Format / Size | PDF / 245 Kb |
| Document Language | English |
ELECTRICAL CHARACTERISTICS The. denotes the specifications which apply over the full operating
Model Line for this Datasheet
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LTC1980
ELECTRICAL CHARACTERISTICS The
●
denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25
°
C.VBAT = 2.4V, VREG = 5V, VBAT unloaded. SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
VP2 Digital Input Pull-Up Voltage, BATT1 BATT1 Input Floating 1.6 V VIL3 Digital Input Low Voltage, BATT2 0.3 V VIH3 Digital Input High Voltage, BATT2 2 V II1 Digital Input Current, WA –5 5 µA II2 Digital Input Current, BATT1 –10 10 µA II3 Digital Input Current, BATT2 –1 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 LTC1980E is guaranteed to meet performance specifications
Note 3:
TA = 0°C to 70°C. from 0°C to 70°C. Specifications over the –40°C to 85°C operating
W U TYPICAL PERFOR A CE CHARACTERISTICS Feedback Reference Voltage Switching Frequency Variance vs Temperature vs Temperature Regulator Load Regulation
1.2240 1.5 0 VBAT = 4.2V V 1.2235 REG ≅ 3.3V 1.0 –0.2 TA = 25°C FIGURE 5 1.2230 0.5 –0.4 1.2225 (%) 0 –0.6 REG 1.2220 V ∆ –0.5 –0.8 1.2215 FREQUENCY VARIANCE (%) –1.0 –1.0 FEEDBACK REFERENCE VOLTAGE (V) 1.2210 1.2205 –1.5 –1.2 –40 –15 10 35 60 85 –40 –15 10 35 60 85 0 100 200 300 400 500 TEMPERATURE (°C) TEMPERATURE (°C) LOAD CURRENT (mA) 1980 G01 1980 G02 1980 G03
3.3V Regulator Efficiency 5V Regulator Efficiency vs Load Current vs Load Current Regulator Load Step Response
90 90 85 85 VREG 50mV/DIV 80 80 75 75 IL EFFICIENCY (%) 70 EFFICIENCY (%) 70 500mA/DIV VBAT = 3.6V 1980 G06 65 V V 100 BAT = 3.6V µs/DIV BAT = 3.6V 65 TA = 25°C T VREG ≅ 3.3V A = 25°C R8 = 309k I FIGURE 5 FIGURE 5 L = 100mA TO 500mA 60 60 TA = 25°C 10 100 1000 10 100 1000 FIGURE 5 LOAD CURRENT (mA) LOAD CURRENT (mA) 1980 G04 1980 G05 1980f 4
ELECTRICAL CHARACTERISTICS The
●
denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25
°
C.VBAT = 2.4V, VREG = 5V, VBAT unloaded. SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
VP2 Digital Input Pull-Up Voltage, BATT1 BATT1 Input Floating 1.6 V VIL3 Digital Input Low Voltage, BATT2 0.3 V VIH3 Digital Input High Voltage, BATT2 2 V II1 Digital Input Current, WA –5 5 µA II2 Digital Input Current, BATT1 –10 10 µA II3 Digital Input Current, BATT2 –1 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 LTC1980E is guaranteed to meet performance specifications
Note 3:
TA = 0°C to 70°C. from 0°C to 70°C. Specifications over the –40°C to 85°C operating
W U TYPICAL PERFOR A CE CHARACTERISTICS Feedback Reference Voltage Switching Frequency Variance vs Temperature vs Temperature Regulator Load Regulation
1.2240 1.5 0 VBAT = 4.2V V 1.2235 REG ≅ 3.3V 1.0 –0.2 TA = 25°C FIGURE 5 1.2230 0.5 –0.4 1.2225 (%) 0 –0.6 REG 1.2220 V ∆ –0.5 –0.8 1.2215 FREQUENCY VARIANCE (%) –1.0 –1.0 FEEDBACK REFERENCE VOLTAGE (V) 1.2210 1.2205 –1.5 –1.2 –40 –15 10 35 60 85 –40 –15 10 35 60 85 0 100 200 300 400 500 TEMPERATURE (°C) TEMPERATURE (°C) LOAD CURRENT (mA) 1980 G01 1980 G02 1980 G03
3.3V Regulator Efficiency 5V Regulator Efficiency vs Load Current vs Load Current Regulator Load Step Response
90 90 85 85 VREG 50mV/DIV 80 80 75 75 IL EFFICIENCY (%) 70 EFFICIENCY (%) 70 500mA/DIV VBAT = 3.6V 1980 G06 65 V V 100 BAT = 3.6V µs/DIV BAT = 3.6V 65 TA = 25°C T VREG ≅ 3.3V A = 25°C R8 = 309k I FIGURE 5 FIGURE 5 L = 100mA TO 500mA 60 60 TA = 25°C 10 100 1000 10 100 1000 FIGURE 5 LOAD CURRENT (mA) LOAD CURRENT (mA) 1980 G04 1980 G05 1980f 4
