LTC3776EUF(RevA) 查看數據表（PDF） - Linear Technology
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LTC3776EUF
(Rev.:RevA)
(Rev.:RevA)
Linear Technology
LTC3776EUF Datasheet PDF : 28 Pages
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LTC3776
TYPICAL PERFOR A CE CHARACTERISTICS TA = 25°C unless otherwise noted.
Efficiency vs Load Current
100
90
80
70
60
50
40
30
20
10
0
10
FIGURE 14 CIRCUIT
CHANNEL 2 (VIN = 3.3V)
CHANNEL 1 (VIN = 5V)
CHANNEL 1 (VIN = 3.3V)
CHANNEL 2 (VIN = 5V)
100
1000
LOAD CURRENT (mA)
10000
3776 G01
Load Step (Load Connected
Between VOUT1 and VOUT2)
Step from Sinking to Sourcing
Load Current (CH2)
VOUT2
100mV/DIV
AC-COUPLED
LOAD CURRENT
500mA/DIV
20μs/DIV
VIN = 3.3V
FIGURE 14 CIRCUIT
3776 G02
Tracking Start-Up with Internal
Soft-Start (CSS = 0μF)
VOUT1
100mV/DIV
AC-COUPLED
VOUT2
100mV/DIV
AC-COUPLED
LOAD CURRENT
1A/DIV
20μs/DIV
VIN = 3.3V
FIGURE 14 CIRCUIT
VOUT1 SOURCING
VOUT2 SINKING
Tracking Start-Up with External
Soft-Start (CSS = 0.15μF)
VOUT1 =
2.5V
500mV/DIV
VOUT2 =
1.25V
4ms/DIV
VIN = 3.3V
FIGURE 14 CIRCUIT
3776 G05
VOUT1 =
2.5V
500mV/DIV
VOUT2 =
1.25V
3776 G03
500μs/DIV
VIN = 3.3V
FIGURE 14 CIRCUIT
3776 G04
Oscillator Frequency
vs Input Voltage
5
4
3
2
1
0
–1
–2
–3
–4
–5
23 4 56 78
INPUT VOLTAGE (V)
9 10
3736 G06
Maximum Current Sense Voltage
vs ITH1 Pin Voltage (CH1)
100
80
60
40
20
0
–20
0.5
1
1.5
ITH VOLTAGE (V)
2
3776 G07
3776fa
4
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