ltc1876eg-trpbf Linear Technology Corporation, ltc1876eg-trpbf Datasheet - Page 7

• Manufacturer Part Number: ltc1876eg-trpbf
• Description: High Efficiency, 2-phase, Dual Synchronous Step-down Switching Controller And Step-up Regulator
• Manufacturer: Linear Technology Corporation

TYPICAL PERFOR A CE CHARACTERISTICS
1.28
1.27
1.23
1.22
1.26
1.25
1.24
4.5
4.0
3.5
3.0
2.5
2.0
1.0
1.5
0.5
10
0
8
6
4
2
0
–50
–50 –25
–50
Shutdown Latch Thresholds vs
Temperature
Feedback Pin Voltage (AUXV
EXTV
Temperature
–25
–25
CC
and Switch Resistance vs
0
0
TEMPERATURE ( C)
TEMPERATURE ( C)
TEMPERATURE ( C)
0
THRESHOLD
LATCHOFF
25
25
25
LATCH ARMING
50
50
50
75
75
W
100
100
75
FB
1876 G22
1876 G19
1876 G25
)
U
125
125
100
350
200
150
100
300
250
1.6
1.4
1.2
1.0
0.8
0.6
0.4
0.2
20
50
40
35
30
25
15
10
0
0
0
5
– 50
10
0
Oscillator Frequency vs
Temperature (Controller)
Shutdown Pin Current (I
Current Limit for Auxillary
Regulator
– 25
20
1
SHUTDOWN PIN VOLTAGE (V)
30
0
TEMPERATURE ( C)
DUTY CYCLE (%)
2
40
V
25
V
FREQSET
V
T
FREQSET
FREQSET
A
50
= 25 C
3
50
= OPEN
60
= 5V
= 0V
4
75
T
AUXVFB
70
A
= 100 C
100
5
80
1876 G26
1876 G20
1876 G23
)
125
90
6
3.50
3.45
3.30
3.20
1.35
1.30
1.10
1.05
3.40
3.35
3.25
1.25
1.20
1.15
4.6
4.5
4.4
4.3
4.2
4.1
4.0
3.9
3.8
3.6
3.7
–50
–50
–50 –30 –10
Undervoltage Lockout vs
Temperature (Controller)
Quiescent Current for Auxillary
Regulator
Auxillary Regulator Switch
Oscillator Frequency
V
NOT SWITCHING
FB
–25
= 1.3V
0
TEMPERATURE ( C)
TEMPERATURE ( C)
TEMPERATURE ( C)
0
10
25
V
IN
LTC1876
30
= 3.3V
50
50
50
75
70
V
IN
100
= 5V
90
1876 G24
1876 G21
1876 G28
1876fa
7
125
100
110