LTC1874 Linear Technology, LTC1874 Datasheet - Page 3

• Manufacturer Part Number: LTC1874
• Description: Dual Constant Frequency Current Mode Step-Down DC/DC Controller
• Manufacturer: Linear Technology

TYPICAL PERFORMANCE CHARACTERISTICS
825
820
815
810
805
800
795
790
785
780
775
–55
Reference Voltage
vs Temperature
V
IN
–35
= 4.2V
–15
TEMPERATURE ( C)
5
130
120
110
100
25
90
80
70
60
50
20
Maximum (V
vs Duty Cycle
45
30
65
40
W
85 105
DUTY CYCLE (%)
1874 G01
50
IN
U
– SENSE
125
60
70
–
) Voltage
80
–10
V
T
–2
–4
–6
–8
10
IN
A
8
6
4
2
0
= 25 C
–55
= 4.2V
90
Normalized Oscillator Frequency
vs Temperature
1874 G04
V
IN
–35
100
= 4.2V
–15
TEMPERATURE ( C)
5
25
45
65
600
560
520
480
440
400
360
320
280
240
200
85 105
–55
Shutdown Threshold
vs Temperature
V
1874 G02
IN
–35
= 4.2V
125
–15
TEMPERATURE ( C)
5
2.24
2.20
2.16
2.12
2.08
2.04
2.00
1.96
1.92
1.88
1.84
25
–55
Undervoltage Lockout Trip
Voltage vs Temperature
45
V
IN
–35
FALLING
65
–15
85 105
TEMPERATURE ( C)
5
1874 G05
25
125
45
LTC1874
65
85 105
1874 G03
3
125