Datasheet

5
LTC1530
1530fa
PV
CC
Shutdown Supply Current
vs Temperature
PV
CC
Supply Current
vs Gate Capacitance
Shutdown Threshold Voltage
vs Temperature Output Overcurrent Protection
Transient Response
50µs/DIV 1530 G18
2A/DIV
50mV/DIV
Error Amplifier Open-Loop Gain
vs Temperature
Oscillator Frequency
vs Temperature
Maximum G1 Duty Cycle
vs Ambient Temperature
I
MAX
Sink Current vs Temperature
TEMPERATURE (°C)
–55
ERROR AMPLIFIER OPEN-LOOP DC GAIN (dB)
60
55
50
45
40
–15
25
45 125
1530 G10
–35 5
65
85
105
TEMPERATURE (°C)
–55
OSCILLATOR FREQUENCY (kHz)
350
340
330
320
310
300
290
280
270
260
250
–15
25
45 125
1530 G11
–35 5
65
85
105
AMBIENT TEMPERATURE (°C)
–55
MAXIMUM G1 DUTY CYCLE (%)
92
90
88
86
84
82
80
78
–15
25
45 125
1530 G12
–35 5
65
85
105
THERMAL SHUTDOWN OCCURS
BEYOND THESE POINTS
G1, G2
CAPACITANCE
= 1000pF
PV
CC
= 12V
f
OSC
= 300kHz
7700pF
5500pF
3300pF
2200pF
TEMPERATURE (°C)
–55
I
MAX
SINK CURRENT (µA)
300
280
260
240
220
200
180
160
140
120
–15
25
45 125
1530 G13
–35 5
65
85
105
PV
CC
= 12V
G1, G2 ARE NOT SWITCHING
GATE CAPACITANCE (nF)
0
PV
CC
SUPPLY CURRENT (mA)
6
1530 G14
24 8
70
60
50
40
30
20
10
0
1357
PV
CC
= 12V
T
A
= 25°C
GATE CAPACITANCE = C
G1
= C
G2
TEMPERATURE (°C)
–55
80
75
70
65
60
55
50
45
40
35
30
–15
25
45 125
1530 G15
–35 5
65
85
105
PV
CC
= 12V
PV
CC
SHUTDOWN CURRENT (µA)
OUTPUT CURRENT (A)
0
OUTPUT VOLTAGE (V)
3.0
2.5
2.0
1.5
1.0
0.5
0
8
1530 G17
213579
4
6
10
SHORT-CIRCUIT
CURRENT
PV
CC
= 12V
T
A
= 25°C
REFER TO
FIGURE 2
TEMPERATURE (°C)
–55
SHUTDOWN THRESHOLD VOLTAGE (mV)
250
200
150
100
50
0
–15
25
45 125
1530 G16
–35 5
65
85
105
PV
CC
= 12V
MEASURED AT
COMP PIN
TYPICAL PERFOR A CE CHARACTERISTICS
UW