LT3513 View Datasheet(PDF) - Linear Technology
Part Name
Description
Manufacturer
LT3513 Datasheet PDF : 20 Pages
| |||
LT3513
ELECTRICAL CHARACTERISTICS The l denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at TA = 25°C. VIN = 12V, BIAS = 3V, unless otherwise noted.
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
FB Threshold Offset to Begin CT Charge
CT Pin Current Source
CT Threshold to Power VON
VON Switch Drop
Maximum VON Current
VON_CLK Input Voltage High
VON_CLK Input Voltage Low
VONSINK Voltage On
Master Oscillator Frequency
(Note 3)
All FB Pins = 1.5V
All FB Pins = 1.5V
VON Current = 30mA
VE3 = 30V
VONSINK Current = 1μA
90
125
160
mV
16
20
25
μA
1
1.1
1.2
V
200
400
mV
l
30
50
mA
1.5
V
0.3
V
●
1.2
V
1.90
2
2.12
MHz
● 1.80
2.22
MHz
Foldback Switching Frequency
All FB = 0V
200
kHz
UVLO Pin Threshold
UVLO Pin Voltage Rising
1.25
V
UVLO Pin Hysteresis Current
PGOOD Threshold Offset
PGOOD Sink Current
PGOOD Pin Leakage
Switch 1 (2.2A Buck)
VUVLO = 1V
PGOOD Connected to 40V Through 100k
VPGOOD = 40V
3.4
3.9
4.4
μA
90
125
160
mV
4
mA
1
μA
FB1 Voltage
1.215
1.235
1.255
V
● 1.205
1.265
V
FB1 Voltage Line Regulation
FB1 Pin Bias Current
4.5V < VIN < 32V
(Note 4)
0.01
0.03
%/V
●
30
200
nA
Error Amplifier 1 Voltage Gain
250
V/V
Error Amplifier 1 Transconductance
ΔI = 10μA
220
μmhos
Maximum Duty Cycle
●
75
85
%
Switch 1 Current Limit
Duty Cycle = 35% (Note 5)
2.2
3
3.5
A
Switch 1 VCESAT
Switch 1 Leakage Current
ISW = 1.5A
FB1 = 1.5V
430
mV
0.1
10
μA
Minimum BOOST Voltage Above SW1 Pin
BOOST Pin Current
BOOST Schottky Diode Drop
ISW = 1.5A (Note 6)
ISW = 1.5A
I = 170mA
1.8
2.5
V
30
50
mA
700
mV
Switch 2 (1.5A BOOST)
FB2 Voltage
1.20
1.22
1.24
V
● 1.19
1.25
V
FB2 Voltage Line Regulation
FB2 Pin Bias Current
4.5V < VIN < 32V
(Note 4)
0.01
0.03
%/V
●
30
200
nA
Error Amplifier 2 Voltage Gain
250
V/V
Error Amplifier 2 Transconductance
ΔI = 10μA
220
μmhos
Switch 2 Current Limit
1.5
1.85
2.3
A
Switch 2 VCESAT
Switch 2 Leakage Current
ISW2 = 1.2A
FB2 = 1.5V
360
mV
0.1
1
μA
BIAS Pin Current Due to SW2
Maximum Duty Cycle (SW2)
ISW2 = 1.2A
45
mA
●
75
90
%
3513fa
3
Share Link: 