LTC1626 View Datasheet(PDF) - Linear Technology
Part Name
Description
MFG CO.
'LTC1626' PDF : 12 Pages View PDF
TYPICAL PERFORMANCE CHARACTERISTICS
Efficiency vs Input Voltage
(VOUT = 2.5V)
100
98
L1 = 33µH
RSENSE = 0.1Ω
96
CT = 270pF
94
IOUT = 100mA
92
90 IOUT = 250mA
88
86
84
82
80
2.5 3.0 3.5 4.0 4.5 5.0 5.5 6.0 6.5 7.0 7.5
INPUT VOLTAGE (V)
1626 G01
Efficiency vs Output Current
(VOUT = 3.3V)
100
95
90
85
80 L1 = 33µH
VIN = 5V
75
VOUT = 3.3V
RSENSE = 0.1Ω
CT = 270pF
70
0.01
0.1
OUTPUT CURRENT (A)
1
1626 G02
Operating Frequency
2.0
1.8 FIGURE 1 CIRCUIT
1.6
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0
2.5 3.0 3.5 4.0 4.5 5.0 5.5 6.0 6.5 7.0 7.5
INPUT VOLTAGE (V)
1626 G04
DC Supply Current*
5.0
4.5
TJ = 25°C
* DOES NOT INCLUDE
4.0 GATE CHARGE CURRENT
3.5
3.0
2.5
ACTIVE MODE
2.0
1.5
1.0
0.5
SLEEP MODE
0
2.5 3.0 3.5 4.0 4.5 5.0 5.5 6.0 6.5 7.0 7.5
INPUT VOLTAGE (V)
1626 G07
Switch Resistance
1.0
0.9
0.8
0.7
0.6
0.5
TJ = 70°C
0.4
0.3
0.2
TJ = 25°C
TJ = 0°C
0.1
0
2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5 6.0 6.5 7.0
INPUT VOLTAGE (V)
1626 G05
Supply Current in Shutdown
0.50
0.45
TJ = 25°C
SHUTDOWN = VIN
0.40
0.35
0.30
0.25
0.20
0.15
0.10
0.05
0
2.5 3.0 3.5 4.0 4.5 5.0 5.5 6.0 6.5 7.0 7.5
INPUT VOLTAGE (V)
1626 G08
LTC1626
Efficiency vs Input Voltage
(VOUT = 3.3V)
100
98
96
IOUT = 100mA
94
92 IOUT = 250mA
90
88
86
84 L1 = 33µH
82
RSENSE = 0.1Ω
CT = 270pF
80
2.5 3.0 3.5 4.0 4.5 5.0 5.5 6.0 6.5 7.0 7.5
INPUT VOLTAGE (V)
1626 G03
Switch Leakage Current
100
90 VIN = 4.5V
80
70
60
50
40
30
20
10
0
0 10 20 30 40 50 60 70 80 90 100
JUNCTION TEMPERATURE (°C)
1626 G06
Low Voltage Behavior
5.0
4.5
L1 = 33µH
RSENSE = 0.1Ω
4.0 CT = 270pF
TJ = 25°C
3.5 ILOAD = 250mA
3.0
2.5
VOUT = 3.3V
VOUT = 2.5V
2.0
1.5
1.0
0.5
0
0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0
INPUT VOLTAGE (V)
1626 G09
3
Share Link: 
