LTC3701 Linear Technology, LTC3701 Datasheet - Page 4

• Manufacturer Part Number: LTC3701
• Description: 2-Phase/ Low Input Voltage/ Dual Step-Down DC/DC Controller
• Manufacturer: Linear Technology

LTC3701
TYPICAL PERFOR A CE CHARACTERISTICS
4
2.15
2.05
2.00
1.90
1.85
2.10
1.95
–60
Undervoltage Lockout Trip
Voltage (Falling) vs Temperature
–40
–20
TEMPERATURE ( C)
0
600
500
400
300
200
100
20
500
450
400
350
300
250
200
150
100
50
0
0
Input and Shutdown Currents vs
Input Voltage
0
PGOOD R
2
40
FIGURE 1 CIRCUIT
LOAD CURRENT = 0A
PULSE SKIPPING MODE OPERATION
1
3
60
BURST MODE OPERATION
2
W
4
(EXTCLK/MODE = 0V)
(EXTCLK/MODE = V
ON
80
INPUT VOLTAGE (V)
3
INPUT VOLTAGE (V)
3701 G04
(I
5
TH
vs Input Voltage
SHUTDOWN
U
4
100
/RUN
6
5
1,2
7
= 0V)
6
I
IN
PGOOD
8
2.20
2.18
2.16
2.14
2.12
2.10
2.08
2.06
2.04
2.00
2.02
)
7
–60
9
Undervoltage Lockout Trip
Voltage (Rising) vs Temperature
8
= 500 A
10
3701 G07
–40
3701 G09
9
11
10
–20
TEMPERATURE ( C)
0
20
CURRENT
40
5V/DIV
5V/DIV
1A/DIV
INPUT
SW1
SW2
100
60
90
80
70
60
50
40
1
2-Phase Operation
Efficiency vs Load Current (Pulse
Skipping Mode)
FIGURE 1 CIRCUIT
EXTCLK/MODE = GND
V
80
FIGURE 1 CIRCUIT
OUT
3701 G05
V
IN
100
= 2.5V
= 6V
10
LOAD CURRENT (mA)
V
IN
500ns/DIV
= 4.2V
125
120
115
110
105
100
100
–60
Maximum Current Sense
Threshold vs Temperature
–40 –20
100O
V
IN
V
IN
= 8.4V
TEMPERATURE ( C)
= 3.3V
3701 G08
0
1OOOO
20
40
60
80
3701 G06
3701fa
100