Datasheet LTC1627 (Analog Devices) - 4
| Manufacturer | Analog Devices |
| Description | Monolithic Synchronous Step-Down Switching Regulator |
| Pages / Page | 16 / 4 — TYPICAL PERFOR A CE CHARACTERISTICS. Oscillator Frequency. Maximum Output … |
| File Format / Size | PDF / 240 Kb |
| Document Language | English |
TYPICAL PERFOR A CE CHARACTERISTICS. Oscillator Frequency. Maximum Output Load Current. vs Temperature. vs Input Voltage
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LTC1627
W U TYPICAL PERFOR A CE CHARACTERISTICS Oscillator Frequency Oscillator Frequency Maximum Output Load Current vs Temperature vs Input Voltage vs Input Voltage
390 390 1100 VIN = 5V VSYNC/FCB = 0V V 380 V DR = –VIN SYNC/FCB = 0V 380 1000 370 370 900 VDR = 0V 360 360 800 350 350 700 340 340 600 330 330 500 320 320 400 OSCILLATOR FREQUENCY (kHz) OSCILLATOR FREQUENCY (kHz) 310 310 300 VOUT = 2.5V MAXIMUM OUTPUT LOAD CURRENT (mA) L = 15µH 300 300 200 – 50 – 25 0 25 50 75 100 125 2.5 3.5 4.5 5.5 6.5 7.5 8.5 2.5 3.5 4.5 5.5 6.5 7.5 8.5 TEMPERATURE (°C) INPUT VOLTAGE (V) INPUT VOLTAGE (V) 1627 G10 1627 G11 1627 G12
Switch Leakage Current Switch Resistance Switch Resistance vs Temperature vs Temperature vs Input Voltage
1800 0.9 0.9 VIN = 8.4V VIN = 5V VDR = 0V 1600 VDR = 0V 0.8 VDR = 0V 0.8 1400 ) 0.7 SYNCHRONOUS ) 0.7 Ω SWITCH Ω SYNCHRONOUS SWITCH 1200 0.6 0.6 1000 0.5 0.5 MAIN SWITCH SYNCHRONOUS MAIN 800 0.4 0.4 SWITCH SWITCH 600 0.3 0.3 400 SWITCH RESISTANCE ( 0.2 SWITCH RESISTANCE ( 0.2 MAIN SYNCHRONOUS SWITCH LEAKAGE (nA) 200 0.1 0.1 SWITCH 0 0 0 – 50 – 25 0 25 50 75 100 125 – 50 – 25 0 25 50 75 100 125 2.5 3.5 4.5 5.5 6.5 7.5 8.5 TEMPERATURE (°C) TEMPERATURE (°C) INPUT VOLTAGE (V) 1627 G13 1627 G14 1627 G15
Load Step Transient Response Load Step Transient Response Burst Mode Operation
ITH ITH 0.5V/DIV 0.5V/DIV SW 5V/DIV VOUT VOUT VOUT 50mV/DIV 50mV/DIV 20mV/DIV AC COUPLED AC COUPLED AC COUPLED ILOAD ILOAD ILOAD 500mA/DIV 500mA/DIV 200mA/DIV 1627 G16 1627 G17 25µs/DIV 1627 G18 25µs/DIV 10µs/DIV VIN = 5V VIN = 5V VIN = 5V VOUT = 3.3V VOUT = 3.3V VOUT = 3.3V L = 15µH L = 15µH L = 15µH CIN = 22µF CIN = 22µF CIN = 22µF COUT = 100µF COUT = 100µF COUT = 100µF ILOAD = 0mA TO 500mA ILOAD = 0mA TO 500mA ILOAD = 50mA Burst Mode OPERATION FORCED CONTINUOUS MODE 4
W U TYPICAL PERFOR A CE CHARACTERISTICS Oscillator Frequency Oscillator Frequency Maximum Output Load Current vs Temperature vs Input Voltage vs Input Voltage
390 390 1100 VIN = 5V VSYNC/FCB = 0V V 380 V DR = –VIN SYNC/FCB = 0V 380 1000 370 370 900 VDR = 0V 360 360 800 350 350 700 340 340 600 330 330 500 320 320 400 OSCILLATOR FREQUENCY (kHz) OSCILLATOR FREQUENCY (kHz) 310 310 300 VOUT = 2.5V MAXIMUM OUTPUT LOAD CURRENT (mA) L = 15µH 300 300 200 – 50 – 25 0 25 50 75 100 125 2.5 3.5 4.5 5.5 6.5 7.5 8.5 2.5 3.5 4.5 5.5 6.5 7.5 8.5 TEMPERATURE (°C) INPUT VOLTAGE (V) INPUT VOLTAGE (V) 1627 G10 1627 G11 1627 G12
Switch Leakage Current Switch Resistance Switch Resistance vs Temperature vs Temperature vs Input Voltage
1800 0.9 0.9 VIN = 8.4V VIN = 5V VDR = 0V 1600 VDR = 0V 0.8 VDR = 0V 0.8 1400 ) 0.7 SYNCHRONOUS ) 0.7 Ω SWITCH Ω SYNCHRONOUS SWITCH 1200 0.6 0.6 1000 0.5 0.5 MAIN SWITCH SYNCHRONOUS MAIN 800 0.4 0.4 SWITCH SWITCH 600 0.3 0.3 400 SWITCH RESISTANCE ( 0.2 SWITCH RESISTANCE ( 0.2 MAIN SYNCHRONOUS SWITCH LEAKAGE (nA) 200 0.1 0.1 SWITCH 0 0 0 – 50 – 25 0 25 50 75 100 125 – 50 – 25 0 25 50 75 100 125 2.5 3.5 4.5 5.5 6.5 7.5 8.5 TEMPERATURE (°C) TEMPERATURE (°C) INPUT VOLTAGE (V) 1627 G13 1627 G14 1627 G15
Load Step Transient Response Load Step Transient Response Burst Mode Operation
ITH ITH 0.5V/DIV 0.5V/DIV SW 5V/DIV VOUT VOUT VOUT 50mV/DIV 50mV/DIV 20mV/DIV AC COUPLED AC COUPLED AC COUPLED ILOAD ILOAD ILOAD 500mA/DIV 500mA/DIV 200mA/DIV 1627 G16 1627 G17 25µs/DIV 1627 G18 25µs/DIV 10µs/DIV VIN = 5V VIN = 5V VIN = 5V VOUT = 3.3V VOUT = 3.3V VOUT = 3.3V L = 15µH L = 15µH L = 15µH CIN = 22µF CIN = 22µF CIN = 22µF COUT = 100µF COUT = 100µF COUT = 100µF ILOAD = 0mA TO 500mA ILOAD = 0mA TO 500mA ILOAD = 50mA Burst Mode OPERATION FORCED CONTINUOUS MODE 4
