Datasheet LTC1625 (Analog Devices) - 3
| Fabricante | Analog Devices |
| Descripción | No RSENSE Current Mode Synchronous Step-Down Switching Regulator |
| Páginas / Página | 24 / 3 — ELECTRICAL CHARACTERISTICS TA = 25. C, VIN = 15V unless otherwise noted. … |
| Formato / tamaño de archivo | PDF / 392 Kb |
| Idioma del documento | Inglés |
ELECTRICAL CHARACTERISTICS TA = 25. C, VIN = 15V unless otherwise noted. SYMBOL. PARAMETER. CONDITIONS. MIN. TYP. MAX. UNITS
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LTC1625
ELECTRICAL CHARACTERISTICS TA = 25
°
C, VIN = 15V unless otherwise noted. SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
BG Transition Time BG tR Rise Time CLOAD = 3300pF 50 150 ns BG tF Fall Time CLOAD = 3300pF 50 150 ns
Internal VCC Regulator
VINTVCC Internal VCC Voltage 6V < VIN < 30V, VEXTVCC = 4V ● 5.0 5.2 5.4 V VLDOINT INTVCC Load Regulation ICC = 20mA, VEXTVCC = 4V – 1 – 2 % VLDOEXT EXTVCC Voltage Drop ICC = 20mA, VEXTVCC = 5V 180 300 mV VEXTVCC EXTVCC Switchover Voltage ICC = 20mA, VEXTVCC Ramping Positive ● 4.5 4.7 V
Oscillator
fOSC Oscillator Freqency 135 150 165 kHz fH/fOSC Maximum Synchronized Frequency Ratio 1.5 VSYNC SYNC Pin Threshold (Figure 4) Ramping Positive 0.9 1.2 V RSYNC SYNC Pin Input Resistance 50 kΩ The ● denotes specifications which apply over the full operating
Note 3:
The LTC1625 is tested in a feedback loop that adjusts VOSENSE to temperature range. achieve a specified error amplifier output voltage (ITH).
Note 1:
Absolute Maximum Ratings are those values beyond which the life
Note 4:
Typical in application circuit with EXTVCC tied to VOUT = 5V, of a device may be impaired. IOUT = 0A and FCB = INTVCC. Dynamic supply current is higher due
Note 2:
T to the gate charge being delivered at the switching frequency. See J is calculated from the ambient temperature TA and power dissipation P Applications Information. D according to the following formula: LTC1625CGN/LTC1625IGN: T
Note 5:
Minimum input supply voltage is 3.9V at – 40°C for industrial J = TA + (PD • 130°C/W) LTC1625CS/LTC1625IS: T grade parts. J = TA + (PD • 110°C/W) 3
ELECTRICAL CHARACTERISTICS TA = 25
°
C, VIN = 15V unless otherwise noted. SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
BG Transition Time BG tR Rise Time CLOAD = 3300pF 50 150 ns BG tF Fall Time CLOAD = 3300pF 50 150 ns
Internal VCC Regulator
VINTVCC Internal VCC Voltage 6V < VIN < 30V, VEXTVCC = 4V ● 5.0 5.2 5.4 V VLDOINT INTVCC Load Regulation ICC = 20mA, VEXTVCC = 4V – 1 – 2 % VLDOEXT EXTVCC Voltage Drop ICC = 20mA, VEXTVCC = 5V 180 300 mV VEXTVCC EXTVCC Switchover Voltage ICC = 20mA, VEXTVCC Ramping Positive ● 4.5 4.7 V
Oscillator
fOSC Oscillator Freqency 135 150 165 kHz fH/fOSC Maximum Synchronized Frequency Ratio 1.5 VSYNC SYNC Pin Threshold (Figure 4) Ramping Positive 0.9 1.2 V RSYNC SYNC Pin Input Resistance 50 kΩ The ● denotes specifications which apply over the full operating
Note 3:
The LTC1625 is tested in a feedback loop that adjusts VOSENSE to temperature range. achieve a specified error amplifier output voltage (ITH).
Note 1:
Absolute Maximum Ratings are those values beyond which the life
Note 4:
Typical in application circuit with EXTVCC tied to VOUT = 5V, of a device may be impaired. IOUT = 0A and FCB = INTVCC. Dynamic supply current is higher due
Note 2:
T to the gate charge being delivered at the switching frequency. See J is calculated from the ambient temperature TA and power dissipation P Applications Information. D according to the following formula: LTC1625CGN/LTC1625IGN: T
Note 5:
Minimum input supply voltage is 3.9V at – 40°C for industrial J = TA + (PD • 130°C/W) LTC1625CS/LTC1625IS: T grade parts. J = TA + (PD • 110°C/W) 3