LT1930AES5 LINER [Linear Technology], LT1930AES5 Datasheet - Page 3

• Manufacturer Part Number: LT1930AES5
• Description: 1A, 1.2MHz/2.2MHz, Step-Up DC/DC Converters
• Manufacturer: LINER [Linear Technology]

TYPICAL PERFOR A CE CHARACTERISTICS
PI FU CTIO S
SW (Pin 1): Switch Pin. Connect inductor/diode here.
Minimize trace area at this pin to reduce EMI.
GND (Pin 2): Ground. Tie directly to local ground plane.
FB (Pin 3): Feedback Pin. Reference voltage is 1.255V.
Connect resistive divider tap here. Minimize trace area at
FB. Set V
7.0
6.5
6.0
5.5
5.0
4.5
4.0
3.5
3.0
1.6
1.4
1.2
1.0
0.8
0.6
0.4
0.2
U
0
–50
10
Quiescent Current
Current Limit
NOT SWITCHING
20
–25
OUT
U
30
according to V
TEMPERATURE ( C)
0
DUTY CYCLE (%)
40
25
50
U
LT1930
60
50
70
W
LT1930A
OUT
75
1930/A G01
1930/A G04
80
= 1.255V(1 + R1/R2).
U
100
90
0.30
0.25
0.20
0.10
0.45
0.40
0.35
0.15
0.05
1.28
1.27
1.26
1.25
1.24
1.23
1.22
0
–50
0
FB Pin Voltage
Switch Saturation Voltage
–25
0.2
SWITCH CURRENT (A)
TEMPERATURE ( C)
0.4
0
0.6
25
SHDN (Pin 4): Shutdown Pin. Tie to 2.4V or more to enable
device. Ground to shut down.
V
IN
0.8
50
(Pin 5): Input Supply Pin. Must be locally bypassed.
1.0
75
1930/A G05
1930/A G02
100
1.2
–10
2.5
2.3
2.1
1.9
1.7
1.5
1.3
1.1
0.9
0.7
0.5
30
90
80
70
60
50
40
20
10
0
–50
0
Oscillator Frequency
SHDN Pin Current
LT1930/LT1930A
–25
1
LT1930A
SHDN PIN VOLTAGE (V)
TEMPERATURE ( C)
2
0
25
3
LT1930
LT1930A
50
4
LT1930
75
5
1930/A G06
1930/A G03
3
100
6