Datasheet

LTC3765
4
3765fb
For more information www.linear.com/LTC3765
TYPICAL PERFORMANCE CHARACTERISTICS
Charge Pump Output Current
vs Temperature
Start-Up Oscillator Frequency
vs R
FS
Resistor Value
Start-Up Oscillator Frequency
vs Temperature
I
SMAG
Thresholds
vs Temperature
V
CC
Supply Current
vs Supply Voltage
I
SMAG
Replicated Slope
vs RUN Pin Voltage and R
CORE
V
CC
UVLO Thresholds
vs Temperature
I
SMAG
Replicated Slope
vs Temperature
Charge Pump Output Current
vs V
CC
Supply Current
SUPPLY VOLTAGE (V)
0
SUPPLY CURRENT (mA)
1.0
15
3765 G01
0.5
0
5 10
1.5
2.0
TEMPERATURE (°C)
–55
UVLO THRESHOLD (V)
7.1
7.3
155
3765 G02
6.9
6.8
5
65
125
–25
35
95
7.6
7.0
7.2
7.4
7.5
FALLING
RISING
V
CC
VOLTAGE (V)
3
0
CHARGE PUMP CURRENT (µA)
10
20
30
40
5 7 9
3765 G03
50
60
70
80
90
100
4 6
8
NDRV = V
CC
+ 2V
NDRV = V
CC
+ 4V
–55 155
5
65
125
–25
35
95
TEMPERATURE (°C)
20
CHARGE PUMP CURRENT (µA)
25
30
35
40
3765 G04
45
50
NDRV = 7V
V
CC
= 5V
NDRV = 9V
R
FS
(kΩ)
0
0
FREQUENCY (kHz)
50
150
200
250
500
350
20
40
50
3765 G05
100
400
450
300
10 30
60
70
80
TEMPERATURE (°C)
–55
FREQUENCY (kHz)
300
400
500
65
3765 G06
200
100
250
350
450
150
50
0
–25
5
35
95 125
155
R
FS
= 10kΩ
R
FS
= 20kΩ
R
FS
= 75kΩ
TEMPERATURE (°C)
–55
THRESHOLD VOLTAGE MAGNITUDE (V)
1.01
1.02
1.03
35 95
3765 G07
1.00
0.99
–25 5
65 125
155
0.98
0.97
POSITIVE THRESHOLD MAGNITUDE
NEGATIVE THRESHOLD MAGNITUDE
RUN PIN VOLTAGE (V)
1
0
REPLICATED SLOPE (mV/µs)
200
600
800
1000
5
1800
3765 G08
400
3
2
6
4 7
1200
1400
1600
R
CORE
= 10kΩ
R
CORE
= 30kΩ
R
CORE
= 50kΩ
TEMPERATURE (°C)
–55
0
REPLICATED SLOPE (mV/µs)
50
150
200
250
500
350
5
65
95
3765 G09
100
400
450
300
–25
35
125
155
V
RUN
= 1.5V
R
CORE
= 10kΩ
R
CORE
= 30kΩ
R
CORE
= 50kΩ