LTC1878 View Datasheet(PDF) - Linear Technology
Part Name
Description
MFG CO.
'LTC1878' PDF : 16 Pages View PDF
LTC1878
TYPICAL PERFOR A CE CHARACTERISTICS
Efficiency vs Output Current
95
90
VIN = 3V
85
VIN = 3.6V
VIN = 4.2V
80
VIN = 6V
75
70
65
0.1
VOUT = 1.8V
L = 10µH
1
10
100
OUTPUT CURRENT (mA)
1000
1878 G04
Oscillator Frequency
vs Supply Voltage
605
595
585
575
565
555
545
535
525
515
505
495
0
2
4
6
SUPPLY VOLTAGE (V)
8
1878 G07
RDS(ON) vs Temperature
1.2
SYNCHRONOUS SWITCH
1.1
MAIN SWITCH
1.0
0.9
0.8
VIN = 3V
0.7
VIN = 5V
0.6
0.5
0.4
0.3
–50 –25
0 25 50 75
TEMPERATURE (°C)
100 125
1878 G10
Reference Voltage
vs Temperature
0.814
VIN = 3.6V
0.809
0.804
0.799
0.794
0.789
0.784
–50 –25
0 25 50 75
TEMPERATURE (°C)
100 125
1878 G05
Output Voltage vs Load Current
1.83
1.82
1.81
1.80
1.79
1.78 PULSE SKIPPING MODE
VIN = 3.6V
L = 10µH
1.77
0 100 200 300 400 500 600 700 800 900
LOAD CURRENT (mA)
1878 G08
DC Supply Current
vs Input Voltage
250
VOUT = 1.8V
PULSE SKIPPING
200
MODE
150
100
50
Burst Mode
OPERATION
0
01234567
INPUT VOLTAGE (V)
1878 G11
Oscillator Frequency
vs Temperature
605
VIN = 3.6V
595
585
575
565
555
545
535
525
515
505
495
–50 –25
0 25 50 75
TEMPERATURE (°C)
100 125
1878 G06
RDS(ON) vs Input Voltage
0.9
0.8
0.7
SYNCHRONOUS
SWITCH
0.6
0.5
MAIN
SWITCH
0.4
0.3
0.2
0.1
0
012345678
INPUT VOLTAGE (V)
1878 G09
DC Supply Current
vs Temperature
300
VIN = 3.6V
250
PULSE SKIPPING
200
MODE
150
100
50
0
–50 –25
Burst Mode
OPERATION
0 25 50 75
TEMPERATURE (°C)
100 125
1878 G12
4
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