Datasheet

4
LTC3701
3701fa
TYPICAL PERFOR A CE CHARACTERISTICS
UW
Undervoltage Lockout Trip
Voltage (Falling) vs Temperature
TEMPERATURE (°C)
–60
1.85
INPUT VOLTAGE (V)
1.90
1.95
2.00
2.05
–20 20
60
100
3701 G04
2.10
2.15
–40 0
40
80
Undervoltage Lockout Trip
Voltage (Rising) vs Temperature
TEMPERATURE (°C)
–60
2.00
INPUT VOLTAGE (V)
2.02
2.06
2.08
2.10
2.20
2.14
–20
20
40
3701 G05
2.04
2.16
2.18
2.12
–40 0
60
80
100
Maximum Current Sense
Threshold vs Temperature
Input and Shutdown Currents vs
Input Voltage
Efficiency vs Load Current (Pulse
Skipping Mode)
PGOOD R
ON
vs Input Voltage
2-Phase Operation
TEMPERATURE (°C)
–60
MAXIMUM CURRENT SENSE THRESHOLD (mV)
125
120
115
110
105
100
0 40 100
3701 G06
–40 –20
20
60 80
INPUT VOLTAGE (V)
2
INPUT CURRENT (µA)
4
6
711
3701 G07
35
8
9
10
600
500
400
300
200
100
0
PULSE SKIPPING MODE OPERATION
(EXTCLK/MODE = 0V)
BURST MODE OPERATION
(EXTCLK/MODE = V
IN
)
SHUTDOWN
(I
TH
/RUN
1,2
= 0V)
FIGURE 1 CIRCUIT
LOAD CURRENT = 0A
LOAD CURRENT (mA)
EFFICIENCY (%)
100
90
80
70
60
50
40
1 100 100O 1OOOO
3701 G08
10
FIGURE 1 CIRCUIT
EXTCLK/MODE = GND
V
OUT
= 2.5V
V
IN
= 3.3V
V
IN
= 4.2V
V
IN
= 6V
V
IN
= 8.4V
INPUT VOLTAGE (V)
500
450
400
350
300
250
200
150
100
50
0
PGOOD R
DS(ON)
(Ω)
3701 G09
0123
4
5
678910
I
PGOOD
= 500µA
SW1
5V/DIV
SW2
5V/DIV
INPUT
CURRENT
1A/DIV
FIGURE 1 CIRCUIT
500ns/DIV