LT1949-1EMS8#TRPBF Linear Technology, LT1949-1EMS8#TRPBF Datasheet - Page 3

• Manufacturer Part Number: LT1949-1EMS8#TRPBF
• Description: IC DC/DC CONV PWM 1A SWTCH 8MSOP
• Manufacturer: Linear Technology
• Type: Step-Up (Boost)r

Specifications of LT1949-1EMS8#TRPBF

• Internal Switch(s): Yes
• Synchronous Rectifier: No
• Number Of Outputs: 1
• Voltage - Output: Adj to 28V
• Current - Output: 1A
• Frequency - Switching: 1.1MHz
• Voltage - Input: 1.7 ~ 12 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 8-MSOP, Micro8™, 8-uMAX, 8-uSOP,
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Power - Output: -

TYPICAL PERFOR A CE CHARACTERISTICS
1.3
1.2
1.1
1.0
0.9
1.0
0.8
0.6
0.4
0.2
60
55
50
45
40
35
30
0
–50
0
0
Oscillator Frequency
Switch Voltage Drop (V
Quiescent Current, SHDN = 0V
–40 C
85 C
25 C
–25
0.2
2
SWITCH CURRENT (A)
INPUT VOLTAGE (V)
TEMPERATURE ( C)
0.4
4
0
0.6
25
6
25 C
0.8
50
8
CESAT
–40 C
W
85 C
10
1.0
75
)
1949-1 G01
1949-1 G04
1949-1 G07
U
100
1.2
12
1.25
1.24
1.23
1.22
1.21
1.20
1.3
1.2
1.1
1.0
0.9
0.8
60
55
50
45
40
35
30
25
20
15
10
–50
–50
0
Switch Current Limit
Feedback Voltage
FB Pin Bias Current
–25
–25
20
TEMPERATURE ( C)
TEMPERATURE ( C)
DUTY CYCLE (%)
0
0
40
25
25
60
50
50
80
75
75
1949-1 G05
1949-1 G08
1949-1 G02
100
100
100
8.5
8.0
7.5
7.0
6.5
6.0
5.5
5.0
4.5
1.3
1.2
1.1
1.0
0.9
0.8
–2
–4
–6
2
1
0
–50
–50
0
Switch Current Limit,
Duty Cycle = 30%
Quiescent Current, SHDN = 2V
SHDN Pin Current
–25
–25
1
SHDN PIN VOLTAGE (V)
TEMPERATURE ( C)
TEMPERATURE ( C)
0
0
2
25
25
3
LT1949-1
50
50
4
75
75
5
1949-1 G06
1949-1 G03
1949-1 G09
3
100
100
6