Datasheet LTC3549 (Analog Devices) - 5
| Manufacturer | Analog Devices |
| Description | 250mA Low VIN Buck Regulator in 2mm × 3mm DFN |
| Pages / Page | 16 / 5 — TYPICAL PERFOR A CE CHARACTERISTICS |
| File Format / Size | PDF / 370 Kb |
| Document Language | English |
TYPICAL PERFOR A CE CHARACTERISTICS
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Text Version of Document
LTC3549
W U TYPICAL PERFOR A CE CHARACTERISTICS (From Typical Application on the front page, except for the resistive divider resistor values) Oscillator Frequency Oscillator Frequency Shift Output Voltage vs Load Current vs Temperature vs Input Voltage VIN = 1.6V, VOUT = 1.2V
2.35 2.5 1.205 2.0 2.30 V 1.204 IN = 2.7V VIN = 1.6V 1.5 2.25 1.203 1.0 2.20 0.5 1.202 VIN = 4.2V BURST 0 2.15 1.201 OUTPUT VOLTAGE (V) –0.5 OSCILLATOR FREQUENCY (MHz) 2.10 1.200 V OSCILLATOR FREQUENCY SHIFT (%) OUT –1.0 PULSE SKIP 2.05 –1.5 1.199 –50 –25 0 25 50 75 100 125 1.5 2.5 3.5 4.5 5.5 0 100 200 300 TEMPERATURE (°C) INPUT VOLTAGE (V) LOAD CURRENT (mA) 3549 G07 3549 G08 3549 G09
Dynamic Input Current RDS(ON) vs Input Voltage RDS(ON) vs Temperature VOUT = 1.5V, 247k
Ω
Load
DYNAMIC SUPPLY CURRENT—BURST MODE ( 0.9 0.95 µA) 10000 70 0.8 Burst Mode 0.85 OPERATION 60 0.7 0.75 50 0.6 ) Ω Ω) 0.65 ( MAIN SWITCH 0.5 ( 40 0.55 1000 DS(ON) 0.4 DS(ON) R R 30 0.45 0.3 SYNCHRONOUS SWITCH 20 0.35 0.2 PULSE SKIP MODE 0.1 0.25 10 µ 0 0.15 DYNAMIC SUPPLY CURRENT—PULSE SKIP ( A) 100 0 1.5 2.5 3.5 4.5 5.5 –50 –25 0 25 50 75 100 125 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5 6.0 INPUT VOLTAGE (V) TEMPERATURE (°C) INPUT VOLTAGE (V) 3549 G10 3549 G11 3549 G12 MAIN SWITCH SYNCHRONOUS SWITCH VIN = 1.6V VIN = 1.6V VIN = 2.7V VIN = 2.7V VIN = 4.2V VIN = 4.2V
Dynamic Supply Current vs Temperature, VIN = 3.6V, Switch Leakage vs Temperature VOUT = 1.5V, No Load VIN = 5.5V Switch Leakage vs Input Voltage
350 250 1.6 ) 300 1.4 µA 200 PULSE SKIP ) 1.2 250 1.0 150 200 SYNCHRONOUS SWITCH MAIN SWITCH 0.8 150 100 0.6 100 SWITCH LEAKAGE (nA SWITCH LEAKAGE (nA) 0.4 MAIN SWITCH BURST 50 DYNAMIC SUPPLY CURRENT ( 50 0.2 SYNCHRONOUS SWITCH 0 0 0 –50 –25 0 25 50 75 100 125 –50 –25 0 25 50 75 100 125 0 2 4 6 TEMPERATURE (°C) TEMPERATURE (°C) INPUT VOLTAGE (V) 3549 G13 3549 G14 3549 G15 3549f 5
W U TYPICAL PERFOR A CE CHARACTERISTICS (From Typical Application on the front page, except for the resistive divider resistor values) Oscillator Frequency Oscillator Frequency Shift Output Voltage vs Load Current vs Temperature vs Input Voltage VIN = 1.6V, VOUT = 1.2V
2.35 2.5 1.205 2.0 2.30 V 1.204 IN = 2.7V VIN = 1.6V 1.5 2.25 1.203 1.0 2.20 0.5 1.202 VIN = 4.2V BURST 0 2.15 1.201 OUTPUT VOLTAGE (V) –0.5 OSCILLATOR FREQUENCY (MHz) 2.10 1.200 V OSCILLATOR FREQUENCY SHIFT (%) OUT –1.0 PULSE SKIP 2.05 –1.5 1.199 –50 –25 0 25 50 75 100 125 1.5 2.5 3.5 4.5 5.5 0 100 200 300 TEMPERATURE (°C) INPUT VOLTAGE (V) LOAD CURRENT (mA) 3549 G07 3549 G08 3549 G09
Dynamic Input Current RDS(ON) vs Input Voltage RDS(ON) vs Temperature VOUT = 1.5V, 247k
Ω
Load
DYNAMIC SUPPLY CURRENT—BURST MODE ( 0.9 0.95 µA) 10000 70 0.8 Burst Mode 0.85 OPERATION 60 0.7 0.75 50 0.6 ) Ω Ω) 0.65 ( MAIN SWITCH 0.5 ( 40 0.55 1000 DS(ON) 0.4 DS(ON) R R 30 0.45 0.3 SYNCHRONOUS SWITCH 20 0.35 0.2 PULSE SKIP MODE 0.1 0.25 10 µ 0 0.15 DYNAMIC SUPPLY CURRENT—PULSE SKIP ( A) 100 0 1.5 2.5 3.5 4.5 5.5 –50 –25 0 25 50 75 100 125 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5 6.0 INPUT VOLTAGE (V) TEMPERATURE (°C) INPUT VOLTAGE (V) 3549 G10 3549 G11 3549 G12 MAIN SWITCH SYNCHRONOUS SWITCH VIN = 1.6V VIN = 1.6V VIN = 2.7V VIN = 2.7V VIN = 4.2V VIN = 4.2V
Dynamic Supply Current vs Temperature, VIN = 3.6V, Switch Leakage vs Temperature VOUT = 1.5V, No Load VIN = 5.5V Switch Leakage vs Input Voltage
350 250 1.6 ) 300 1.4 µA 200 PULSE SKIP ) 1.2 250 1.0 150 200 SYNCHRONOUS SWITCH MAIN SWITCH 0.8 150 100 0.6 100 SWITCH LEAKAGE (nA SWITCH LEAKAGE (nA) 0.4 MAIN SWITCH BURST 50 DYNAMIC SUPPLY CURRENT ( 50 0.2 SYNCHRONOUS SWITCH 0 0 0 –50 –25 0 25 50 75 100 125 –50 –25 0 25 50 75 100 125 0 2 4 6 TEMPERATURE (°C) TEMPERATURE (°C) INPUT VOLTAGE (V) 3549 G13 3549 G14 3549 G15 3549f 5
