Datasheet LTC3852 (Analog Devices) - 8
| Manufacturer | Analog Devices |
| Description | Low Input Voltage, Synchronous Step-Down DC/DC Controller |
| Pages / Page | 32 / 8 — TYPICAL PERFORMANCE CHARACTERISTICS. Charge Pump. SHDN LO-to-HI … |
| File Format / Size | PDF / 429 Kb |
| Document Language | English |
TYPICAL PERFORMANCE CHARACTERISTICS. Charge Pump. SHDN LO-to-HI Threshold. SHDN HI-to-LO Threshold. vs Temperature
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LTC3852
TYPICAL PERFORMANCE CHARACTERISTICS Charge Pump Charge Pump SHDN LO-to-HI Threshold SHDN HI-to-LO Threshold vs Temperature vs Temperature
0.9 0.8 VIN = 3.2V 0.8 0.7 VIN = 3.2V VIN = 2.4V 0.7 VIN = 2.4V 0.6 0.6 0.5 SHDN THRESHOLD LO-TO-HI (V) SHDN THRESHOLD HI-TO-LO (V) 0.5 0.4 –50 0 50 100 150 –50 0 50 100 150 TEMPERATURE (oC) TEMPERATURE (oC) 3852 G32 3852 G33
Charge Pump Short-Circuit Charge Pump Load Regulation Current vs Supply Voltage
5.20 350 5.10 300 5.00 250 VIN = 4.2V TAGE (V) 4.90 200 VIN = 3.6V DEVICE CYCLES 4.80 150 IN AND OUT OF VIN = 2.7V THERMAL SHUTDOWN T-CIRCUIT CURRENT (mA) OUTPUT VOL 4.70 100 SHOR 4.60 50 4.50 0 0 100 200 300 400 500 1.5 2.0 2.5 3.0 3.5 4.0 4.5 SUPPLY VOLTAGE (V) LOAD CURRENT (mA) 3852 G34 3852 G35
Charge Pump Output Load Charge Pump Effective Open-Loop Capability at 4% Below Regulation Output Resistance vs Temperature
500 8 125°C VIN = 2.7V 450 85°C V ANCE (Ω) OUT = 4.5V 25°C 400 –45°C 7 350 300 250 6 200 OUTPUT LOAD (mA) 150 5 100 50 0 EFFECTIVE OPEN-LOOP OUTPUT RESIST 4 2.4 2.9 3.4 3.9 –50 0 50 100 SUPPLY VOLTAGE (V) TEMPERATURE (oC) 3852 G36 3852f 8
TYPICAL PERFORMANCE CHARACTERISTICS Charge Pump Charge Pump SHDN LO-to-HI Threshold SHDN HI-to-LO Threshold vs Temperature vs Temperature
0.9 0.8 VIN = 3.2V 0.8 0.7 VIN = 3.2V VIN = 2.4V 0.7 VIN = 2.4V 0.6 0.6 0.5 SHDN THRESHOLD LO-TO-HI (V) SHDN THRESHOLD HI-TO-LO (V) 0.5 0.4 –50 0 50 100 150 –50 0 50 100 150 TEMPERATURE (oC) TEMPERATURE (oC) 3852 G32 3852 G33
Charge Pump Short-Circuit Charge Pump Load Regulation Current vs Supply Voltage
5.20 350 5.10 300 5.00 250 VIN = 4.2V TAGE (V) 4.90 200 VIN = 3.6V DEVICE CYCLES 4.80 150 IN AND OUT OF VIN = 2.7V THERMAL SHUTDOWN T-CIRCUIT CURRENT (mA) OUTPUT VOL 4.70 100 SHOR 4.60 50 4.50 0 0 100 200 300 400 500 1.5 2.0 2.5 3.0 3.5 4.0 4.5 SUPPLY VOLTAGE (V) LOAD CURRENT (mA) 3852 G34 3852 G35
Charge Pump Output Load Charge Pump Effective Open-Loop Capability at 4% Below Regulation Output Resistance vs Temperature
500 8 125°C VIN = 2.7V 450 85°C V ANCE (Ω) OUT = 4.5V 25°C 400 –45°C 7 350 300 250 6 200 OUTPUT LOAD (mA) 150 5 100 50 0 EFFECTIVE OPEN-LOOP OUTPUT RESIST 4 2.4 2.9 3.4 3.9 –50 0 50 100 SUPPLY VOLTAGE (V) TEMPERATURE (oC) 3852 G36 3852f 8
