LTC1433IGN Linear Technology, LTC1433IGN Datasheet - Page 4

• Manufacturer Part Number: LTC1433IGN
• Description: IC DC/DC CONV STEP-DOWN 16-SSOP
• Manufacturer: Linear Technology
• Type: Step-Down (Buck)r

Specifications of LTC1433IGN

• Internal Switch(s): Yes
• Synchronous Rectifier: No
• Number Of Outputs: 1
• Voltage - Output: 3.3V, 5V, Adj
• Current - Output: 450mA
• Frequency - Switching: 125kHz ~ 240kHz
• Voltage - Input: 3 ~ 13.5 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 16-SSOP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Power - Output: -

TYPICAL PERFORMANCE CHARACTERISTICS
LTC1433/LTC1434
4
100
5.1
5.0
4.9
4.8
4.7
4.6
4.5
4.4
4.3
4.2
80
70
60
50
40
90
0.001
8
7
6
5
4
3
2
1
0
4.6
Efficiency of Figure 1 for L = 22 H
Dropout Characteristics at Different
Load Currents (V
Switch Resistance of Small FET
3
4
4.8
200mA
V
IN
I
5
OUT
= 3.6V
5.0
T
SUPPLY VOLTAGE (V)
SUPPLY VOLTAGE (V)
0.01
A
LOAD CURRENT (A)
6
= 25 C
5.2
V
V
IN
IN
7
I
300mA
OUT
= 5V
= 12V
5.4
OUT
8
I
400mA
OUT
T
T
A
A
9
5.6
= 70 C
= 5V)
= 0 C
0.1
10
V
L = 22 H
C
V
L = 20 H
C
OUT
SOC
5.8
PROG
OSC
W
11
= 3.3V
= 47pF
= 50pF
1433/34 G01
1433/34 G04
6.0
1433/34 G07
= V
12
IN
U
6.2
13
1
2.0
1.8
1.6
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0
480
440
420
380
360
3
460
400
800
700
600
400
300
200
Switch Resistance of Big FET
500
3
3
Supply Current vs Supply Voltage
Maximum Output Current
vs Input Supply
4
L = 22 H
C
OSC
5
4
= 50pF
SUPPLY VOLTAGE (V)
5
6
T
A
5
SUPPLY VOLTAGE (V)
= 25 C
SUPPLY VOLTAGE (V)
7
6
7
8
T
T
V
V
3.3V
A
A
5V
OUT
OUT
7
= 70 C
= 0 C
9
10
9
8
11
9
1433/34 G08
11
12
1433/34 G02
1433/34 G05
10
13
11
13
70
60
40
30
20
50
10
0
Switch Leakage Current
vs Temperature
0
1.202
1.198
1.194
1.190
1.186
1.182
1.178
1.174
1.170
V
IN
3.4
3.3
3.2
3.1
3.0
2.9
2.8
2.7
2.6
2.5
2.4
20
= 13.5V
– 45
3.2
Dropout Characteristics at Different
Load Currents (V
Reference Voltage
vs Temperature
SSW PIN
300mA
3.4
I
– 25
40
OUT
TEMPERATURE ( C)
400mA
I
3.6
OUT
– 5
60
3.8
SUPPLY VOLTAGE (V)
TEMPERATURE ( C)
I
500mA
OUT
BSW PIN
15
80
4.0
4.2
35
OUT
100
4.4
55
= 3.3V)
120
1433/34 G09
4.6
V
L = 20 H
C
75
PROG
OSC
4.8
140
1433/34 G06
= 50pF
1433/34 G03
95
280
160
0
= 0V
240
200
120
80
40
5.0
115
5.2