lt3505ems8e-trpbf Linear Technology Corporation, lt3505ems8e-trpbf Datasheet - Page 6

• Manufacturer Part Number: lt3505ems8e-trpbf
• Description: 1.2a, Step-down Switching Regulator In 3mm X 3mm Dfn
• Manufacturer: Linear Technology Corporation

LT3505
TYPICAL PERFORMANCE CHARACTERISTICS
6
505
500
2.0
1.9
1.8
1.7
1.6
1.5
1.4
1.3
1.2
1.1
1.0
495
490
485
480
–50
–50
Switch Current Limit
R
V
T
FB
Pin Bias Voltage
–25
= 0.78V
–25
20mV/DIV
0
TEMPERATURE (°C)
0
0.5A/DIV
TEMPERATURE(°C)
5V/DIV
V
V
OUT
25
25
SW
I
0
L
Operating Waveforms
V
V
I
L = 10µH
C
R
OUT
IN
OUT
OUT
T
50
50
= 75.0k
= 12V
= 0.5A
= 3.3V
= 10µF
75
75
100
100
1µs/DIV
125
125
2.5
2.0
1.0
3.0
1.5
0.5
1.8
1.7
1.6
1.5
1.4
1.3
1.2
0
0
0
Switching Frequency
3505 G18
Switch Current Limit, R
T
A
10
= 25°C
5
20
R
T
10
PIN BIAS CURRENT (µA)
30
DUTY CYCLE (%)
40
15
50
20
60
20mV/DIV
0.5A/DIV
70
T
25
5V/DIV
= 75.0k
V
V
T
OUT
80
SW
A
I
0
L
= 25°C
30
Operating Waveforms,
Discontinuous Mode
V
V
I
L = 10µH
C
R
90
3505 G20
OUT
IN
OUT
OUT
T
= 75.0k
= 12V
100
= 50mA
35
= 3.3V
= 10µF
160
140
120
100
0.1
80
60
40
20
1µs/DIV
0
1
–50
10
Typical Minimum On Time
Switching Frequency
–25
R
T
0
TEMPERATURE (°C)
PIN RESISTANCE (kΩ)
25
3505 F26
50
100
75
T
A
100
= 25°C
3505 G24
3505fc
125