Datasheet LTC7804 (Analog Devices) - 8
| Manufacturer | Analog Devices |
| Description | Low IQ Synchronous Boost Controller |
| Pages / Page | 34 / 8 — TYPICAL PERFORMANCE CHARACTERISTICS. SS Pin Pull-Up Current. Shutdown … |
| File Format / Size | PDF / 1.5 Mb |
| Document Language | English |
TYPICAL PERFORMANCE CHARACTERISTICS. SS Pin Pull-Up Current. Shutdown Current. vs Temperature. vs T
Model Line for this Datasheet
- LTC7804EMSE#PBF LTC7804EMSE#TRPBF LTC7804EMSE#WPBF LTC7804EMSE#WTRPBF LTC7804EUD#PBF LTC7804EUD#TRPBF LTC7804EUD#WPBF LTC7804EUD#WTRPBF LTC7804HMSE#PBF LTC7804HMSE#TRPBF LTC7804HMSE#WPBF LTC7804HMSE#WTRPBF LTC7804HUD#PBF LTC7804HUD#TRPBF LTC7804HUD#WPBF LTC7804HUD#WTRPBF LTC7804IMSE#PBF LTC7804IMSE#TRPBF LTC7804IMSE#WPBF LTC7804IMSE#WTRPBF LTC7804IUD#PBF LTC7804IUD#TRPBF LTC7804IUD#WPBF LTC7804IUD#WTRPBF
Text Version of Document
LTC7804
TYPICAL PERFORMANCE CHARACTERISTICS SS Pin Pull-Up Current Shutdown Current vs Temperature vs T Shutdown Current vs Temperature Shutdown Current vs T vs Input Voltage vs Input V
15.0 10 3.0 VIN = VBIAS 14.5 9 14.0 2.5 8 13.5 7 2.0 13.0 6 12.5 1.5 T CURRENT (µA) 5 AR 12.0 4 T–ST 11.5 1.0 3 SOF 11.0 SHUTDOWN CURRENT (µA) 2 SHUTDOWN CURRENT (µA) 0.5 10.5 1 10.0 0 0 –55 –25 5 35 65 95 125 155 –55 –25 5 35 65 95 125 155 0 5 10 15 20 25 30 35 40 TEMPERATURE (°C) TEMPERATURE (°C) INPUT VOLTAGE (V) 7804 G10 7804 G11 3897 G12
RUN Pin Thresholds Undervoltage Lockout Thresholds Quiescent Current vs Temperature vs Temperature vs T vs Temperature vs T
50 1.30 5.0 45 4.8 1.25 40 4.6 35 RUN RISING 1.20 4.4 INTVCC RISING 30 TAGE (v) 4.2 TAGE (V) 25 1.15 4.0 INTVCC FALLING VOL 20 RUN FALLING 3.8 V CC 1.10 15 RUN PIN VOL INT 3.6 QUIESCENT CURRENT (µA) 10 1.05 3.4 5 3.2 0 1.00 3.0 –55 –25 5 35 65 95 125 155 –55 –25 5 35 65 95 125 155 –55 25 5 35 65 95 125 155 TEMPERATURE (°C) TEMPERATURE (°C) TEMPERATURE (°C) 7804 G13 7804 G14 7804 G15
INTVCC and EXTVCC INTVCC Line Regulation CC INTVCC Line Regulation vs Load Curent vs Load Current
5.3 5.3 5.3 NO LOAD NO LOAD 5.2 5.2 5.2 EXTVCC = 0V 5.1 5.1 5.1 5.0 EXTVCC = 8.5V 4.9 5.0 5.0 4.8 TAGE (V) TAGE (V) TAGE (V) 4.9 4.7 4.9 EXTVCC = 5V VOL VOL VOL 4.6 V CC 4.8 V CC 4.8 V CC 4.5 INT INT INT 4.4 4.7 4.7 4.3 4.6 4.6 4.2 4.1 VBIAS = 12V 4.5 4.5 4.0 0 5 10 15 20 25 30 35 40 4.50 4.75 5 5.25 5.50 5.75 6 0 10 20 30 40 50 60 70 80 INPUT VOLTAGE (V) INPUT VOLTAGE (V) LOAD CURRENT (mA) 7804 G16 7804 G17 7804 G18 Rev. 0 8 For more information www.analog.com Document Outline Features Applications Typical Application Description Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Operation Main Control Loop INTVCC/EXTVCC Power Boost Supply and Dropout (BOOST and SW Pins) Shutdown and Start-Up (RUN, SS Pins) Light Load Current Operation: Burst Mode Operation, Pulse-Skipping or Forced Continuous Mode (MODE Pin) Frequency Selection, Spread Spectrum and Phase-Locked-Loop (FREQ and PLLIN/SPREAD Pins) Operation When VIN > VOUT Operation at Low Input Voltage BOOST Supply Refresh and Internal Charge Pump Applications Information SENSE+ and SENSE– Pins Low Value Resistor Current Sensing Inductor DCR Sensing Inductor Value Calculation Inductor Core Selection Power MOSFET Selection CIN and COUT Selection Setting Output Voltage RUN Pin Soft-Start (SS Pin) INTVCC Regulators Topside MOSFET Driver Supply (CB, DB) Phase-Locked Loop and Frequency Synchronization Setting the Operating Frequency Selecting the Light-Load Operating Mode Minimum On-Time Considerations Fault Conditions: Overtemperature Protection Efficiency Considerations Checking Transient Response Design Example PC Board Layout Checklist PC Board Layout Debugging Package Description Typical Application Related Parts
TYPICAL PERFORMANCE CHARACTERISTICS SS Pin Pull-Up Current Shutdown Current vs Temperature vs T Shutdown Current vs Temperature Shutdown Current vs T vs Input Voltage vs Input V
15.0 10 3.0 VIN = VBIAS 14.5 9 14.0 2.5 8 13.5 7 2.0 13.0 6 12.5 1.5 T CURRENT (µA) 5 AR 12.0 4 T–ST 11.5 1.0 3 SOF 11.0 SHUTDOWN CURRENT (µA) 2 SHUTDOWN CURRENT (µA) 0.5 10.5 1 10.0 0 0 –55 –25 5 35 65 95 125 155 –55 –25 5 35 65 95 125 155 0 5 10 15 20 25 30 35 40 TEMPERATURE (°C) TEMPERATURE (°C) INPUT VOLTAGE (V) 7804 G10 7804 G11 3897 G12
RUN Pin Thresholds Undervoltage Lockout Thresholds Quiescent Current vs Temperature vs Temperature vs T vs Temperature vs T
50 1.30 5.0 45 4.8 1.25 40 4.6 35 RUN RISING 1.20 4.4 INTVCC RISING 30 TAGE (v) 4.2 TAGE (V) 25 1.15 4.0 INTVCC FALLING VOL 20 RUN FALLING 3.8 V CC 1.10 15 RUN PIN VOL INT 3.6 QUIESCENT CURRENT (µA) 10 1.05 3.4 5 3.2 0 1.00 3.0 –55 –25 5 35 65 95 125 155 –55 –25 5 35 65 95 125 155 –55 25 5 35 65 95 125 155 TEMPERATURE (°C) TEMPERATURE (°C) TEMPERATURE (°C) 7804 G13 7804 G14 7804 G15
INTVCC and EXTVCC INTVCC Line Regulation CC INTVCC Line Regulation vs Load Curent vs Load Current
5.3 5.3 5.3 NO LOAD NO LOAD 5.2 5.2 5.2 EXTVCC = 0V 5.1 5.1 5.1 5.0 EXTVCC = 8.5V 4.9 5.0 5.0 4.8 TAGE (V) TAGE (V) TAGE (V) 4.9 4.7 4.9 EXTVCC = 5V VOL VOL VOL 4.6 V CC 4.8 V CC 4.8 V CC 4.5 INT INT INT 4.4 4.7 4.7 4.3 4.6 4.6 4.2 4.1 VBIAS = 12V 4.5 4.5 4.0 0 5 10 15 20 25 30 35 40 4.50 4.75 5 5.25 5.50 5.75 6 0 10 20 30 40 50 60 70 80 INPUT VOLTAGE (V) INPUT VOLTAGE (V) LOAD CURRENT (mA) 7804 G16 7804 G17 7804 G18 Rev. 0 8 For more information www.analog.com Document Outline Features Applications Typical Application Description Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Operation Main Control Loop INTVCC/EXTVCC Power Boost Supply and Dropout (BOOST and SW Pins) Shutdown and Start-Up (RUN, SS Pins) Light Load Current Operation: Burst Mode Operation, Pulse-Skipping or Forced Continuous Mode (MODE Pin) Frequency Selection, Spread Spectrum and Phase-Locked-Loop (FREQ and PLLIN/SPREAD Pins) Operation When VIN > VOUT Operation at Low Input Voltage BOOST Supply Refresh and Internal Charge Pump Applications Information SENSE+ and SENSE– Pins Low Value Resistor Current Sensing Inductor DCR Sensing Inductor Value Calculation Inductor Core Selection Power MOSFET Selection CIN and COUT Selection Setting Output Voltage RUN Pin Soft-Start (SS Pin) INTVCC Regulators Topside MOSFET Driver Supply (CB, DB) Phase-Locked Loop and Frequency Synchronization Setting the Operating Frequency Selecting the Light-Load Operating Mode Minimum On-Time Considerations Fault Conditions: Overtemperature Protection Efficiency Considerations Checking Transient Response Design Example PC Board Layout Checklist PC Board Layout Debugging Package Description Typical Application Related Parts
