lt3503edcb-trpbf Linear Technology Corporation, lt3503edcb-trpbf Datasheet - Page 4

• Manufacturer Part Number: lt3503edcb-trpbf
• Description: 1a, 2.2mhz Step-down Switching Regulator In 2mm X 3mm Dfn
• Manufacturer: Linear Technology Corporation

LT3503
4
TYPICAL PERFOR A CE CHARACTERISTICS
1.8
1.6
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0
4
Maximum Load Current
V
L = 2.2µH
OUT
5
= 3.3V
6
INPUT VOLTAGE (V)
4.00
3.90
3.80
3.70
3.60
3.50
3.40
3.30
3.20
3.10
3.00
TYPICAL
7
2.5
2.0
1.0
0.5
1.5
0
–45
Undervoltage Lockout
0
Frequency Foldback
8
MINIMUM
100 200
–25
9
FEEDBACK VOLTAGE (mV)
10
W
–5
TEMPERATURE (°C)
300
11
3503 G03
15
400
U
12
35
500
600 700
55
1.8
1.6
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0
3503 G10
6
3503 G08
Maximum Load Current
75
V
L = 3.3µH
OUT
800
7
= 5V
8
INPUT VOLTAGE (V)
9
TYPICAL
10
MINIMUM
11
12
2.25
2.00
1.75
2.75
2.50
2.0
1.8
1.6
1.4
1.2
1.0
0.8
0.6
0.4
0.2
13
0
–45
0
Switching Frequency
Soft-Start
3503 G04
14
T
0.25
A
–25
= 25°C unless otherwise noted.
15
0.50
SHDN PIN VOLTAGE (V)
–5
TEMPERATURE (°C)
0.75
500
450
400
350
300
250
200
150
100
50
15
0
1
0
Switch Voltage Drop
1.25
35
300
1.50 1.75
55
T
SWITCH CURRENT (mA)
A
= 25°C
3503 G11
600
3503 G09
75
T
A
2
= 85°C
T
900
A
= –45°C
1200
3503 G07
1500
3503f