Datasheet LTC3528-2 (Analog Devices) - 5
| Hersteller | Analog Devices |
| Beschreibung | 1A, 2MHz Synchronous Step-Up DC/DC Converter in 2mm × 3mm DFN |
| Seiten / Seite | 18 / 5 — TYPICAL PERFORMANCE CHARACTERISTICS (TA = 25°C unless otherwise noted). … |
| Dateiformat / Größe | PDF / 406 Kb |
| Dokumentensprache | Englisch |
TYPICAL PERFORMANCE CHARACTERISTICS (TA = 25°C unless otherwise noted). Burst Mode Threshold Current
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LTC3528-2
TYPICAL PERFORMANCE CHARACTERISTICS (TA = 25°C unless otherwise noted) Burst Mode Threshold Current Oscillator Frequency Change vs V vs V IN OUT RDS(ON) vs VOUT
80 0.50 450 VOUT = 5V 0.25 0 400 60 –0.25 350 EXIT BURST –0.50 –0.75 300 (mA) (mΩ) 40 –1.00 PMOS I OUT 250 ENTER BURST –1.25 R DS(ON) 20 –1.50 200 FREQUENCY CHANGE (%) –1.75 NMOS 150 –2.00 0 –2.25 100 1 1.5 2 2.5 3 3.5 4 1.5 2 2.5 3 3.5 4 4.5 5 1.5 2 2.5 3 3.5 4 4.5 5 VIN (V) VOUT (V) VOUT (V) 35242 G11 35282 G12 35282 G13
Oscillator Frequency Change vs Temperature RDS(ON) Change vs Temperature VFB vs Temperature
2 40 1.200 1 30 1.199 0 20 –1 (V) 10 1.198 V FB CHANGE (%) –2 0 FREQUENCY CHANGE (%) 1.197 –3 –10 –4 –20 1.196 –50 –25 0 25 50 75 100 125 –50 –25 0 25 50 75 100 125 –50 –25 0 25 50 75 100 125 TEMPERATURE (˚C) TEMPERATURE (˚C) TEMPERATURE (°C) 35282 G14 35282 G15 35282 G16
Output Voltage vs Load Current Output Voltage vs Load Current for VOUT = 5V for VOUT = 3.3V Start-Up Voltage vs Temperature
0.20 0.20 850 VIN = 3.6V VIN = 1.2V 0.15 0.15 800 0.10 0.10 0.05 0.05 750 0 0 700 –0.05 –0.05 –0.10 –0.10 START-UP VOLTAGE (mV) 650 CHANGE IN OUTPUT VOLTAGE (%) –0.15 CHANGE IN OUTPUT VOLTAGE (%) –0.15 –0.20 –0.20 600 0 200 400 600 0 50 100 150 200 –50 –25 0 25 50 75 100 125 LOAD CURRENT (mA) LOAD CURRENT (mA) TEMPERATURE (°C) 3528-2 G27 35282 G28 35282 G17 35282fb 5 Document Outline Features Applications Description Typical Application Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Operation Applications Information Typical Applications Package Description Revision History Related Parts
TYPICAL PERFORMANCE CHARACTERISTICS (TA = 25°C unless otherwise noted) Burst Mode Threshold Current Oscillator Frequency Change vs V vs V IN OUT RDS(ON) vs VOUT
80 0.50 450 VOUT = 5V 0.25 0 400 60 –0.25 350 EXIT BURST –0.50 –0.75 300 (mA) (mΩ) 40 –1.00 PMOS I OUT 250 ENTER BURST –1.25 R DS(ON) 20 –1.50 200 FREQUENCY CHANGE (%) –1.75 NMOS 150 –2.00 0 –2.25 100 1 1.5 2 2.5 3 3.5 4 1.5 2 2.5 3 3.5 4 4.5 5 1.5 2 2.5 3 3.5 4 4.5 5 VIN (V) VOUT (V) VOUT (V) 35242 G11 35282 G12 35282 G13
Oscillator Frequency Change vs Temperature RDS(ON) Change vs Temperature VFB vs Temperature
2 40 1.200 1 30 1.199 0 20 –1 (V) 10 1.198 V FB CHANGE (%) –2 0 FREQUENCY CHANGE (%) 1.197 –3 –10 –4 –20 1.196 –50 –25 0 25 50 75 100 125 –50 –25 0 25 50 75 100 125 –50 –25 0 25 50 75 100 125 TEMPERATURE (˚C) TEMPERATURE (˚C) TEMPERATURE (°C) 35282 G14 35282 G15 35282 G16
Output Voltage vs Load Current Output Voltage vs Load Current for VOUT = 5V for VOUT = 3.3V Start-Up Voltage vs Temperature
0.20 0.20 850 VIN = 3.6V VIN = 1.2V 0.15 0.15 800 0.10 0.10 0.05 0.05 750 0 0 700 –0.05 –0.05 –0.10 –0.10 START-UP VOLTAGE (mV) 650 CHANGE IN OUTPUT VOLTAGE (%) –0.15 CHANGE IN OUTPUT VOLTAGE (%) –0.15 –0.20 –0.20 600 0 200 400 600 0 50 100 150 200 –50 –25 0 25 50 75 100 125 LOAD CURRENT (mA) LOAD CURRENT (mA) TEMPERATURE (°C) 3528-2 G27 35282 G28 35282 G17 35282fb 5 Document Outline Features Applications Description Typical Application Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Operation Applications Information Typical Applications Package Description Revision History Related Parts