Datasheet LTC3826-1 (Analog Devices) - 4
| Hersteller | Analog Devices |
| Beschreibung | 30µA IQ, Dual, 2-Phase Synchronous Step-Down Controller |
| Seiten / Seite | 32 / 4 — ELECTRICAL CHARACTERISTICS. Note 1:. Note 4:. Note 5:. Note 2:. Note 6:. … |
| Dateiformat / Größe | PDF / 438 Kb |
| Dokumentensprache | Englisch |
ELECTRICAL CHARACTERISTICS. Note 1:. Note 4:. Note 5:. Note 2:. Note 6:. Note 7:. Note 3:. TYPICAL PERFORMANCE CHARACTERISTICS
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LTC3826-1
ELECTRICAL CHARACTERISTICS Note 1:
Stresses beyond those listed under Absolute Maximum Ratings
Note 4:
The LTC3826-1 is tested in a feedback loop that servos VITH1, 2 to may cause permanent damage to the device. Exposure to any Absolute a specifi ed voltage and measures the resultant VFB1, 2. 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. See Applications Information.
Note 2:
The LTC3826E-1 is guaranteed to meet performance specifi cations
Note 6:
Rise and fall times are measured using 10% and 90% levels. Delay from 0°C to 85°C. Specifi cations over the –40°C to 85°C operating times are measured using 50% levels. temperature range are assured by design, characterization and correlation with statistical process controls. The LTC3826I-1 is guaranteed to
Note 7:
The minimum on-time condition is specifi ed for an inductor meet performance specifi cations over the full −40°C to 85°C operating peak-to-peak ripple current ≥40% of IMAX (see minimum on-time temperature range. considerations in the Applications Information section).
Note 3:
TJ is calculated from the ambient temperature TA and power dissipation PD according to the following formula: TJ = TA + (PD • 95 °C/W)
TYPICAL PERFORMANCE CHARACTERISTICS Effi ciency and Power Loss vs Output Current Effi ciency vs Load Current Effi ciency vs Input Voltage
100 10000 100 98 Burst Mode OPERATION 90 FORCED CONTINUOUS MODE 90 96 PULSE SKIPPING 80 1000 MODE 80 94 70 POWER LOSS (mW) 70 92 60 100 60 50 50 90 40 10 40 88 EFFICIENCY (%) EFFICIENCY (%) EFFICIENCY (%) 30 30 86 20 1 20 VIN = 12V 10 V 84 IN = 12V 10 VIN = 5V VOUT = 3.3V VOUT = 3.3V 0 0.1 0 82 0.00001 0.0001 0.001 0.01 0.1 1 10 0.00001 0.0001 0.001 0.01 0.1 1 10 0 5 10 15 20 25 30 35 40 OUTPUT CURRENT (A) OUTPUT CURRENT (A) INPUT VOLTAGE (V) 38261 G01 38261 G02 38261 G03 FIGURE 13 CIRCUIT FIGURE 13 CIRCUIT
Load Step Load Step Load Step (Burst Mode Operation) (Forced Continuous Mode) (Pulse Skipping Mode)
VOUT VOUT VOUT 100mV/DIV 100mV/DIV 100mV/DIV AC AC AC COUPLED COUPLED COUPLED IL I IL 2A/DIV L 2A/DIV 2A/DIV 20μs/DIV 20μs/DIV 20μs/DIV 38261 G04 38261 G05 38261 G06 FIGURE 13 CIRCUIT FIGURE 13 CIRCUIT FIGURE 13 CIRCUIT VOUT = 3.3V VOUT = 3.3V VOUT = 3.3V 38261fb 4
ELECTRICAL CHARACTERISTICS Note 1:
Stresses beyond those listed under Absolute Maximum Ratings
Note 4:
The LTC3826-1 is tested in a feedback loop that servos VITH1, 2 to may cause permanent damage to the device. Exposure to any Absolute a specifi ed voltage and measures the resultant VFB1, 2. 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. See Applications Information.
Note 2:
The LTC3826E-1 is guaranteed to meet performance specifi cations
Note 6:
Rise and fall times are measured using 10% and 90% levels. Delay from 0°C to 85°C. Specifi cations over the –40°C to 85°C operating times are measured using 50% levels. temperature range are assured by design, characterization and correlation with statistical process controls. The LTC3826I-1 is guaranteed to
Note 7:
The minimum on-time condition is specifi ed for an inductor meet performance specifi cations over the full −40°C to 85°C operating peak-to-peak ripple current ≥40% of IMAX (see minimum on-time temperature range. considerations in the Applications Information section).
Note 3:
TJ is calculated from the ambient temperature TA and power dissipation PD according to the following formula: TJ = TA + (PD • 95 °C/W)
TYPICAL PERFORMANCE CHARACTERISTICS Effi ciency and Power Loss vs Output Current Effi ciency vs Load Current Effi ciency vs Input Voltage
100 10000 100 98 Burst Mode OPERATION 90 FORCED CONTINUOUS MODE 90 96 PULSE SKIPPING 80 1000 MODE 80 94 70 POWER LOSS (mW) 70 92 60 100 60 50 50 90 40 10 40 88 EFFICIENCY (%) EFFICIENCY (%) EFFICIENCY (%) 30 30 86 20 1 20 VIN = 12V 10 V 84 IN = 12V 10 VIN = 5V VOUT = 3.3V VOUT = 3.3V 0 0.1 0 82 0.00001 0.0001 0.001 0.01 0.1 1 10 0.00001 0.0001 0.001 0.01 0.1 1 10 0 5 10 15 20 25 30 35 40 OUTPUT CURRENT (A) OUTPUT CURRENT (A) INPUT VOLTAGE (V) 38261 G01 38261 G02 38261 G03 FIGURE 13 CIRCUIT FIGURE 13 CIRCUIT
Load Step Load Step Load Step (Burst Mode Operation) (Forced Continuous Mode) (Pulse Skipping Mode)
VOUT VOUT VOUT 100mV/DIV 100mV/DIV 100mV/DIV AC AC AC COUPLED COUPLED COUPLED IL I IL 2A/DIV L 2A/DIV 2A/DIV 20μs/DIV 20μs/DIV 20μs/DIV 38261 G04 38261 G05 38261 G06 FIGURE 13 CIRCUIT FIGURE 13 CIRCUIT FIGURE 13 CIRCUIT VOUT = 3.3V VOUT = 3.3V VOUT = 3.3V 38261fb 4