LTC3807_15 Datasheet, PDF (8/32 Pages) Linear Technology – Low IQ, Synchronous Step-Down Controller with 24V Output Voltage Capability

LTC3807
TYPICAL PERFORMANCE CHARACTERISTICS
SENSE^– Pin Input Bias Current
vs Temperature
800
700
V_OUT > INTV_CC + 0.5V
600
500
400
300
200
100
0
V_OUT < INTV_CC – 0.5V
–100
–75 –50 –25 0 25 50 75 100 125 150
TEMPERATURE (°C)
3807 G22
Undervoltage Lockout Threshold
vs Temperature
4.2
4.1
4.0
RISING
3.9
FALLING
3.8
3.7
3.6
–75 –50 –25 0 25 50 75 100 125 150
TEMPERATURE (°C)
3807 G25
Total Input Supply Current vs
Input Voltage
300
FIGURE 12 CIRCUIT
250
200
150
300µA LOAD
100
NO LOAD
50
0
5 10 15 20 25 30 35 40
INPUT VOLTAGE (V)
3807 G10
Shutdown Current vs Input
Voltage
30
25
20
15
10
5
0
5 10 15 20 25 30 35 40
INPUT VOLTAGE (V)
3807 G23
Oscillator Frequency vs Input
Voltage
356
FREQ = GND
354
352
350
348
346
344
5
10 15 20 25 30 35 40
INPUT VOLTAGE (V)
3807 G26
EXTV_CC Switchover and INTV_CC
Voltages vs Temperature
6.0
5.8
5.6
5.4
5.2
INTV_CC
5.0
EXTV_CC RISING
4.8
4.6
EXTV_CC FALLING
4.4
4.2
4.0
–75 –50 –25 0 25 50 75 100 125 150
TEMPERATURE (°C)
3807 G11
8
For more information www.linear.com/LTC3807
Oscillator Frequency
vs Temperature
600
550
FREQ = INTV_CC
500
450
400
FREQ = GND
350
300
–75 –50 –25 0 25 50 75 100 125 150
TEMPERATURE (°C)
3807 G24
Shutdown Current vs Temperature
22
V_IN = 12V
20
18
16
14
12
10
8
–75 –50 –25 0 25 50 75 100 125 150
TEMPERATURE (°C)
3807 G27
INTV_CC vs INTV_CC Load Current
5.5
5.3
5.1
4.9
V_IN = 5.5V
4.7
4.5
4.3
V_IN = 5V
4.1
3.9
3.7
3.5
0
10 20 30 40 50 60 70 80 90 100
INTV_CC LOAD CURRENT (mA)
3807 G12
3807f