Datasheet LTC3526L, LTC3526LB (Analog Devices) - 5
| 制造商 | Analog Devices |
| 描述 | 550mA 1MHz Synchronous Step-Up DC/DC Converters in 2mm × 2mm DFN |
| 页数 / 页 | 16 / 5 — Burst Mode Quiesent Current. VFB vs Temperature. Start-Up Voltage vs … |
| 文件格式/大小 | PDF / 352 Kb |
| 文件语言 | 英语 |
Burst Mode Quiesent Current. VFB vs Temperature. Start-Up Voltage vs Temperature. vs VOUT (LTC3526L). Fixed Frequency Switching
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LTC3526L/LTC3526LB typicAl perForMAnce chArActeristics
Burst Mode Quiesent Current VFB vs Temperature Start-Up Voltage vs Temperature vs VOUT (LTC3526L)
0.50 0.80 10.0 NORMALIZED TO 25°C 0.25 0.75 9.5 1mA LOAD 0 0.70 (%) 9.0 FB –0.25 (V) 0.65 (µA) 8.5 V IN NO LOAD I Q –0.50 0.60 CHANGE IN V 8.0 –0.75 0.55 7.5 –1.00 0.50 7.0 –60 –40 –20 0 20 40 60 80 100 –50 25 0 25 50 75 100 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 TEMPERATURE (°C) TEMPERATURE (°C) VOUT (V) 3526l G13 3526l G14 3526l G15
Fixed Frequency Switching Burst Mode Waveforms Waveform and VOUT Ripple (LTC3526L) VOUT and IIN During Soft-Start
SW PIN VOUT SW PIN 2V/DIV 1V/DIV 2V/DIV VOUT INPUT V 20mV/DIV OUT CURRENT 10mV/DIV AC-COUPLED 0.2A/DIV AC-COUPLED INDUCTOR CURRENT SHDN PIN 0.2A/DIV 1V/DIV V 3526l G16 3526l G17 3526l G18 IN = 1.2V 500ns/DIV VIN = 1.2V 10µs/DIV VOUT = 3.3V 200µs/DIV VOUT = 3.3V AT 100mA VOUT = 3.3V COUT = 10µF COUT = 10µF COUT = 10µF
Load Step Response (from Burst Load Step Response Mode Operation) (LTC3526L) (Fixed Frequency)
VOUT VOUT 100mV/DIV 100mV/DIV AC-COUPLED AC-COUPLED LOAD LOAD CURRENT CURRENT 50mA/DIV 50mA/DIV V 3526l G19 3526l G20 IN = 3.6V 100µs/DIV VIN = 3.6V 100µs/DIV VOUT = 5V VOUT = 5V 20mA TO 170mA STEP 50mA TO 150mA STEP COUT = 10µF COUT = 10µF 3526lfc 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 Typical Application Related Parts
Burst Mode Quiesent Current VFB vs Temperature Start-Up Voltage vs Temperature vs VOUT (LTC3526L)
0.50 0.80 10.0 NORMALIZED TO 25°C 0.25 0.75 9.5 1mA LOAD 0 0.70 (%) 9.0 FB –0.25 (V) 0.65 (µA) 8.5 V IN NO LOAD I Q –0.50 0.60 CHANGE IN V 8.0 –0.75 0.55 7.5 –1.00 0.50 7.0 –60 –40 –20 0 20 40 60 80 100 –50 25 0 25 50 75 100 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 TEMPERATURE (°C) TEMPERATURE (°C) VOUT (V) 3526l G13 3526l G14 3526l G15
Fixed Frequency Switching Burst Mode Waveforms Waveform and VOUT Ripple (LTC3526L) VOUT and IIN During Soft-Start
SW PIN VOUT SW PIN 2V/DIV 1V/DIV 2V/DIV VOUT INPUT V 20mV/DIV OUT CURRENT 10mV/DIV AC-COUPLED 0.2A/DIV AC-COUPLED INDUCTOR CURRENT SHDN PIN 0.2A/DIV 1V/DIV V 3526l G16 3526l G17 3526l G18 IN = 1.2V 500ns/DIV VIN = 1.2V 10µs/DIV VOUT = 3.3V 200µs/DIV VOUT = 3.3V AT 100mA VOUT = 3.3V COUT = 10µF COUT = 10µF COUT = 10µF
Load Step Response (from Burst Load Step Response Mode Operation) (LTC3526L) (Fixed Frequency)
VOUT VOUT 100mV/DIV 100mV/DIV AC-COUPLED AC-COUPLED LOAD LOAD CURRENT CURRENT 50mA/DIV 50mA/DIV V 3526l G19 3526l G20 IN = 3.6V 100µs/DIV VIN = 3.6V 100µs/DIV VOUT = 5V VOUT = 5V 20mA TO 170mA STEP 50mA TO 150mA STEP COUT = 10µF COUT = 10µF 3526lfc 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 Typical Application Related Parts