ltc3890 Linear Technology Corporation, ltc3890 Datasheet - Page 7

• Manufacturer Part Number: ltc3890
• Description: 60v Low Iq, Dual, 2-phase Synchronous Step-down Dc/dc Controller
• Manufacturer: Linear Technology Corporation

TYPICAL PERFORMANCE CHARACTERISTICS
–200
–250
–300
–350
–600
–650
–700
–750
–800
1.05
0.95
0.90
–100
–150
–400
–450
–500
–550
1.10
1.00
–50
4.4
4.3
4.2
4.1
4.0
3.9
3.8
3.7
3.6
3.5
3.4
50
0
–45
–45
–45
TRACK/SS Pull-Up Current
vs Temperature
SENSE
vs Temperature
Undervoltage Lockout Threshold
vs Temperature
–25
–20
–20
–
–5
Pin Total Input Bias Current
5
5
TEMPERATURE (°C)
V
V
TEMPERATURE (°C)
TEMPERATURE (°C)
OUT
OUT
15
FALLING
RISING
30
< INTV
30
> INTV
35
55
55
CC
CC
55
– 0.5V
– 0.5V
75
80
80
95
105
105
3890 G19
3890 G25
3890 G22
115
130
130
1.10
1.05
1.00
1.40
1.35
1.30
1.25
1.20
1.15
356
354
352
350
348
346
344
30
25
20
15
10
5
0
–45
5
5
Shutdown (RUN) Threshold
vs Temperature
Shutdown Current vs Input
Voltage
Oscillator Frequency vs Input
Voltage
FREQ = GND
10
10
RUN1 RISING
–20
RUN1 FALLING
15
15
20
20
5
INPUT VOLTAGE (V)
INPUT VOLTAGE (V)
TEMPERATURE (°C)
25
25
30 35 40 45 50 55 60 65
30 35 40 45 50 55 60 65
30
RUN2 FALLING
55
RUN2 RISING
80
105
3890 G23
3890 G26
3890 G20
130
796
600
550
300
800
806
804
802
800
798
794
792
500
450
400
350
22
20
18
16
14
12
10
8
–45
–45
–45
Regulated Feedback Voltage
vs Temperature
Oscillator Frequency
vs Temperature
Shutdown Current vs Temperature
V
IN
–20
–20
–20
= 12V
5
5
5
TEMPERATURE (°C)
TEMPERATURE (°C)
TEMPERATURE (°C)
FREQ = INTV
FREQ = GND
30
30
30
LTC3890
55
55
55
CC
80
80
80
105
105
105
3890 G21
3890 G24
3890 G27
7
3890f
130
130
130