LT1158CS View Datasheet(PDF) - Linear Technology
Part Name
Description
MFG CO.
'LT1158CS' PDF : 20 Pages View PDF
LT1158
ELECTRICAL CHARACTERISTICS Test Circuit, TA = 25°C, V+ = V16 = 12V, V11 = V12 = V13 = 0V, Pins 1 and 4
open, Gate Feedback pins connected to Gate Drive pins unless otherwise specified.
SYMBOL PARAMETER
V14 – V13 Top Turn-Off Threshold
V8
Bottom Turn-Off Threshold
I5
Fault Output Leakage
V5
Fault Output Saturation
V12 – V11 Fault Conduction Threshold
V12 – V11 Current Limit Threshold
V12 – V11 Current Limit Inhibit
VDS Threshold
tR
Top Gate Rise Time
tD
Top Gate Turn-Off Delay
tF
Top Gate Fall Time
tR
Bottom Gate Rise Time
tD
Bottom Gate Turn-Off Delay
tF
Bottom Gate Fall Time
CONDITIONS
V+ = V16 = 5V, V6 = 0.8V
V+ = V16 = 5V, V6 = 2V
V+ = 30V, V16 = 15V, V6 = 2V
V+ = 30V, V16 = 15V, V6 = 2V, I5 = 10mA
V+ = 30V, V16 = 15V, V6 = 2V, I5 = 100µA
V+ = 30V, V16 = 15V, V6 = 2V, Closed Loop
V+ = V12 = 12V, V6 = 2V, Decrease V11
until V15 goes low
Pin 6 (+) Transition, Meas. V15 – V13 (Note 3)
Pin 6 (–) Transition, Meas. V15 – V13 (Note 3)
Pin 6 (–) Transition, Meas. V15 – V13 (Note 3)
Pin 6 (–) Transition, Meas. V9 (Note 3)
Pin 6 (+) Transition, Meas. V9 (Note 3)
Pin 6 (+) Transition, Meas. V9 (Note 3)
LT1158I
MIN TYP MAX
1 1.75 2.5
1 1.5 2
q
0.1 1
0.5 1
90 110 130
130 150 170
q 120
180
1.1 1.25 1.4
LT1158C
MIN TYP MAX
1 1.75 2.5
1 1.5 2
0.1 1
0.5 1
85 110 135
120 150 180
120
180
1.1 1.25 1.4
UNITS
V
V
µA
V
mV
mV
mV
V
q
130 250
130 250
ns
q
350 550
350 550
ns
q
120 250
120 250
ns
q
130 250
130 250
ns
q
200 400
200 400
ns
q
100 200
100 200
ns
The q denotes specifications that apply over the full operating temperature
range.
Note 1: TJ is calculated from the ambient temperature TA and power
dissipation PD according to the following formulas:
LT1158IN, LT1158CN: TJ = TA + (PD × 70°C/W)
LT1158IS, LT1158CS: TJ = TA + (PD × 110°C/W)
Note 2: Dynamic supply current is higher due to the gate charge being
delivered at the switching frequency. See typical performance
characteristics and applications information.
Note 3: Gate rise times are measured from 2V to 10V, delay times are
measured from the input transition to when the gate voltage has decreased
to 10V, and fall times are measured from 10V to 2V.
TYPICAL PERFORMANCE CHARACTERISTICS
DC Supply Current
14
I2 + I10 + I16
12
10
V13 = 0V
INPUT HIGH V13 = V+
INPUT LOW
8
6
4
ENABLE LOW
2
0
0 5 10 15 20 25 30 35 40
SUPPLY VOLTAGE (V)
LT1158 G01
DC Supply Current
14
I2 + I10 + I16
12 V+ = 12V
10
INPUT HIGH
8
INPUT LOW
6
4
2
ENABLE LOW
0
–50 –25
0 25 50 75
TEMPERATURE (°C)
100 125
LT1158 G02
Dynamic Supply Current (V+)
30
50% DUTY CYCLE
25 CGATE = 3000pF
20
V+ = 24V
15
V+ = 12V
10
V+ = 6V
5
0
1
10
100
INPUT FREQUENCY (kHz)
LT1158 G03
3
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